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Effects of fluorine on photocatalysis

Chinese Journal of Catalysis 2020年第10期41卷 1451-1467页

作者： Xiaofang Li Xiaofeng Wu Shengwei Liu Yuhan Li Jiajie Fan Kangle Lv Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Enducation College of Resources and Environmental ScienceSouth-Central University for NationalitiesWuhan 430074HubeiChina College of Chemistry and Chemical Engineering Wuhan University of Science and TechnologyWuhan 430081HubeiChina School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation TechnologySun Yat-sen UniversityGuangzhou 510006GuangdongChina Engineering Research Center for Waste Oil Recovery Technology and Equipment Ministry of EducationChongqing Key Laboratory of Catalysis and New Environmental MaterialsChongqing Technology and Business UniversityChongqing 400067China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina Laboratory of Inorganic Materials and Catalysis Department of Chemical Engineering and ChemistryEindhoven University of TechnologyP.0.Box 5135600 MB EindhovenThe Netherlands

Tailoring the microstructure of pristine TiO2 is essential to narrow its band gap and prolong the charge lifetime. In particular, strategies involving fluorine have been used successfully to tune the surface chemistry, electronic structure, and morphology of TiO2 photocatalysts to improve their photocatalytic activity based on the strong complexation between fluoride ions and TiO2 and the high electronegativity of fluorine. In this review, we summarize the strategies involving fluorine to establish highly efficient TiO2 photocatalytic systems or fabricate highly efficient TiO2 photocatalysts. The main fluorine effects(i.e. the effects of fluorine on photocatalysis) include the following four aspects:(1) Surface effects of fluoride on TiO2 photocatalysis,(2) effects of fluorine doping on TiO2 photocatalysis,(3) fluoride-mediated tailoring of the morphology of TiO2 photocatalysts, and(4) the effects of fluorine on non-TiO2 photocatalysis. Additionally, the unique applications of these fluorine effects in photocatalysis, including selective degradation of pollutants, selective oxidation of chemicals, water-splitting to produce H2, reduction of CO2 to produce solar fuels, and improvement of the thermostability of TiO2 photocatalysts, are reviewed.

关键词： TiO2 Fluorine Photocatalysis Doping Surface modification

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China's greenhouse gas budget during 2000-2023

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National Science Review 2025年第4期 24-36页

作者： Wenping Yuan Minqi Liang Yuanyi Gao Ling Huang Li Dan Hongtao Duan Songbai Hong Fei Jiang Weimin Ju Tingting Li Ziyang Lou Shilong Luan Xiao Lu Zhangcai Qin Lishan Ran Lulu Shen Fei Teng Xiangjun Tian Yilong Wang Jing Wei Jiangzhou Xia Xiaosheng Xia Lijun Yu Xu Yue Haicheng Zhang Wen Zhang Yuzhong Zhang Xu Zhao Qiuan Zhu Shilong Piao Xuhui Wang Institute of Carbon Neutrality Sino-French Institute for Earth System Science College of Urban and Environmental Sciences Peking University School of Atmospheric Sciences Guangdong Province Data Center of Terrestrial and Marine Ecosystems Carbon Cycle Sun Yat-sen University Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of Sciences Key Laboratory of Lake and Watershed Science for Water Security Nanjing Institute of Geography and LimnologyChinese Academy of Sciences State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences School of Urban Planning and Design Shenzhen Graduate School Peking University Frontiers Science Center for Critical Earth Material Cycling Nanjing University Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology International Institute for Earth System Science Nanjing University Key Laboratory of Atmospheric Environment and Extreme Meteorology Institute of Atmospheric PhysicsChinese Academy of Sciences Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery School of Environmental Science & Engineering Shanghai Jiao Tong University Department of Geography The University of Hong Kong Department of Atmospheric and Oceanic Sciences School of PhysicsPeking University Institute of Energy Environment and Economy Tsinghua University State Key Laboratory of Tibetan Plateau Earth System Resources and Environment (TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of Sciences Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal University State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC) Institute of Atmospheric PhysicsChinese Academy of Sciences Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of

National greenhouse gas（GHG） budget,including CO2,CH4and N2O has increasingly become a topic of concern in international climate *** is paying increasing attention to reducing GHG emissions and increasing land sinks to effectively mitigate climate *** estimates of GHG fluxes are crucial for monitoring progress toward mitigating GHG emissions in *** study used comprehensive methods,including emission factor methods,process-based models,atmospheric inversions,and data-driven models,to estimate the long-term trends of GHG sources and sinks from all anthropogenic and natural sectors in China's mainland during 2000-2023,and produced an up-to-date China GHG Budget dataset（CNGHG）.The total gross emissions of the three GHGs show a 3-fold increase from 5.0（95% CI:4.9-5.1） Gt CO2-eq yr-1（in 2000） to 14.3（95% CI:13.8-14.8） Gt CO2-eqyr-1（in2023）.CO2emissions represented 81.8% of the GHG emissions in 2023,while 12.7% and 5.5% were for CH4and N2O,*** the largest CO2source,the energy sector contributed 87.4% *** contrast,the agriculture,forestry and other land use sector was the largest sector of CH4and N2O,representing 50.1% and 6 6.3% emissions,***,China's terrestrial ecosystems serve as a net CO2sink(1.0 Gt CO2yr-1,9596 CI:0.2-1.9 Gt CO2yr-1) during 2012 to 2021,equivalent to an average of 14.3% of fossil *** GHG emission estimates showed a general consistency with national GHG inventories,with gridded and sector-specific estimates of GHG fluxes over China,providing the basis for curtailing GHG emissions for each region and sector.

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Insight into disinfection byproduct formation potential of aged biochar and its effects during chlorination

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Journal of environmental management 2022年 317卷 115437页

作者： Hailan Yang Shujing Ye Han Wang Chengyun Zhou Ting Xiong Yuanyuan Deng Qianmin Fu Guangming Zeng Zhuotong Zeng Xiaofei Tan Department of Dermatology Second Xiangya Hospital Central South University Changsha 410011 PR China College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China. College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China School of Resources Environment and Materials Guangxi University Nanning 530004 PR China. Institute of Big Data and Internet Innovation Hunan University of Technology and Business Changsha 410205 PR China. College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China. Electronic address: zengzhuotong@***. College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education) Hunan University Changsha 410082 PR China. Electronic address: tanxf@***.

Biochar can achieve multiple benefits including solid waste management, polluted water remediation, carbon sequestration, and emission reduction. However, various environmental factors (such as temperature variations and dry-wet alternation) and microbial activity may lead to the fragmentation, dissolution, and oxidation of biochar. These accelerate the dissolution of biochar-derived dissolved organic matter (DOM) and then influence disinfection byproducts formation potential (DBPFP) throughout the water treatment process. In this paper, biochars from six biomass feedstocks with five aging processes were prepared, and the DBPFP of biochar and its derived DOM were first studied systematically. Different aging processes might increase the DBPFP of biochar by increasing DOM content and changing the fraction distribution of DOM derived from biochar. Especially, the DBPFP of biochar increased apparently with the chemical aging process. Coexisting with the environmental concentration of humic acid, even aged biochar showed the potential to reduce DBPFP and integrated toxic risk value of the mixed system. In this study, the DBPFP of biochar-derived DOM during the disinfection process is confirmed, and the results can give information to the selection of biomass feedstocks of biochar and its service life in the water treatment process.

关键词： Aged biochar Chlorination Disinfection byproducts Dissolved organic matter Integrated toxic risk value

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The impacts of water transfer on water quality under internal and external nutrient load in Chaohu Lake

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Journal of Contaminant Hydrology 2025年 274卷

作者： Zhang Ting Hu Hanqing Xie Huaming Yang Chao Wu Qianjiao Kou Jiefeng Lu Xiaorong Xian Yuyang Wu Jiadong Zhou Xian School of Environment and Energy Engineering Anhui Jianzhu University Hefei China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Hefei China Institute of Remote Sensing and Geographic Information Systems Anhui Jianzhu University Hefei China Changjiang Basin Ecology and Environment Monitoring and Scientific Research Center Changjiang Basin Ecology and Environment Administration Ministry of Ecology and Environment Wuhan China Key Laboratory for Environment and Disaster Monitoring and Evaluation of Hubei Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan China Research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources Changjiang River Scientific Research Institute Wuhan China

Water transfer can alleviate the uneven distribution of regional water resources and improve the eutrophication status of water bodies in the receiving regions. However, few studies have quantitatively analyzed water quality changes in eutrophic lakes under water division considering the effects of internal and external nutrient load. Chaohu Lake, a large shallow lake in East China, was used as an example. Daily meteorological, hydrological, and water quality data for 2023–2024 were applied to develop a coupled hydrodynamic-water quality model using the Environmental Fluid Dynamics Code, considering seasonal sediment release of ammonia, phosphate, and nitrate. Based on this model, the seasonal contributions to nutrient loads from internal and external sources were quantified. Water transfer scenarios were employed to simulate and compare the spatial and temporal changes in the water level and water quality of Chaohu Lake. The results demonstrated that: 1) The simulated values of the water level, water temperature, and water quality parameters (including TN, TP, and DO) fit well with the measured values, thus confirming the reliability of the model. 2) The annual endogenous release of phosphorus and nitrogen accounted for 76.8 % and 75.3 % of the total load from internal and external sources, respectively. 3) Water transfer measures significantly altered the hydrological conditions of the lake, exacerbated seasonal fluctuations in nutrients, and increased sediment release, leading to an increase in TP concentration, and decrease of TN and DO. Under the four water transfer scenarios, the water transfer path of diverting water into Chaohu Lake (150 m 3 /s) through Zhao River and using the Baishitian River as the outlet significantly improved the water quality of the entire lake, with 5.03 % decrease in TN concentration and a minimum increase (14.29 %) of TP. This study provides a scientific basis for water diversion scheduling and eutrophication regulation in lakes.

关键词： EFDC Sediment release Water quality Water transfer project

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Corrigendum to ``Temporal shifts in the phytoplankton network in a large eutrophic shallow freshwater lake subjected to major environmental changes due to human interventions'' [Water Research 261 (2024) 122054]

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Water research 2024年 264卷 122206页

作者： Guojun Cai Yili Ge Zheng Dong Yu Liao Yaoqi Chen Aiping Wu Youzhi Li Huanyao Liu Guixiang Yuan Jianming Deng Hui Fu Erik Jeppesen Ecology Department College of Environments & Ecology Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area Hunan Agricultural University Changsha 410128 PR China Institute of Mountain Resources Guizhou Academy of Science Guiyang 550001 PR China. Ecology Department College of Environments & Ecology Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area Hunan Agricultural University Changsha 410128 PR China. Taihu Laboratory for Lake Ecosystem Research State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China. Electronic address: jmdeng@***. Ecology Department College of Environments & Ecology Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area Hunan Agricultural University Changsha 410128 PR China. Electronic address: huifu367@***. Department of Ecoscience and Centre for Water Technology (WATEC) Aarhus University Vejlsøvej 25 8600 Silkeborg Denmark Sino-Danish Centre for Education and Research (SDC) University of Chinese Academy of Sciences Beijing China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and Implementation Middle East Technical University Ankara Turkey Institute of Marine Sciences Middle East Technical University 33731 Erdemli-Mersin Turkey Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science Yunnan University Kunming China.

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Catalyst and gas diffusion electrode design toward C–N coupling for urea electrosynthesis

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eScience 2025年

作者： Jiping Sun Bichao Wu Guangchao Li Zhixing Wang Xinhai Li Huajun Guo Guochun Yan Hui Duan Wenchao Zhang Min Liu Jiexi Wang School of Metallurgy and Environment Central South University Changsha 410083 China National Energy Metal Resources and New Materials Key Laboratory Engineering Research Center of the Ministry of Education for Advanced Battery Materials Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy Central South University Changsha 410083 China National Engineering Research Centre of Advanced Energy Storage Materials Changsha 410205 China Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution Central South University Changsha 410083 China Department of Physics Central South University Changsha 410083 China

The electrocatalytic C–N coupling reaction involving carbon dioxide (CO 2 ) and nitrogenous small molecules has recently emerged as a subject of considerable interest within the field of urea synthesis. This approach has the potential to facilitate the clean, sustainable production of urea, thereby contributing to the attainment of carbon neutrality and the advancement of artificial nitrogen cycling. Nevertheless, electrocatalytic urea synthesis still faces significant challenges due to the difficulty of balancing the co-activation of carbon and nitrogen sources and the subsequent catalytic C–N coupling of in situ-generated species, as well as competing reactions. To overcome these challenges, there is a growing emphasis on the research of gas diffusion electrodes (GDEs) and the design of electrode materials. This article provides a comprehensive review of the C–N coupling mechanisms, the classification of catalysts, the electrocatalyst design and optimization strategies, and the fundamental functions and importance of GDEs in electrocatalytic C–N coupling reactions. It also provides insights and perspectives on the major challenges and future research directions for GDEs and electrocatalysts in electrocatalytic urea synthesis.

关键词： C–N coupling Urea synthesis Gas diffusion electrode Catalyst design

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Reduced dietary nitrogen with a high Lys:CP ratio restricted dietary N excretion without negatively affecting weaned piglets

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Animal Nutrition 2019年第2期5卷 115-123页

作者： Hongnan Liu Li Wu Hui Han Yuying Li Lijian Wang Jie Yin Wenjun Fan Miaomiao Bai Jiming Yao Xingguo Huang Tiejun Li Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-Ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha410125China Hunan Co-Innovation Center of Animal Production Safety Changsha410128China University of Chinese Academy of Sciences Beijing100039China Department of Animal Science Hunan Agriculture UniversityChangsha410128China Guangdong Wangda Group Academician Workstation for Clean Feed Technology Research and Development in Swine Guangdong Wangda Group Co.Ltd.Guangzhou510663China

We hypothesized that balancing the content of exogenous amino acids, especially lysine, to reduce protein content in swine diets could reduce nitrogen(N) pollution associated with animal husbandry. Two experiments(45 d each experiment) were performed on weaned piglets(Duroc x Landrace x Yorkshire,28 d of age) to test this and to determine the optimal lysine to crude protein(Lys:CP) ratio in diet. In Exp. 1,12 piglets(6 replicates [n = 6]) were fed diets containing different levels of CP(17% and 20%) but the same level of Lys, Increased CP content resulted in significant increases(P < 0.05) of average daily gain(ADG), average daily feed intake(ADFI), and body weight(BW);but did not affect the feed to gain ratio. In Exp. 2,24 piglets(8 replicates [n = 8]) were fed 1 of 3 diets as follows: 1) 20% CP with a regular Lys:CP ratio(6.23%, control);2) 17% CP with a reduced Lys:CP ratio(6.14%, LL);or 3) 17% CP with a standard Lys:CP ratio(7.32%, SL). The ADG, final BW, serum concentrations of growth hormone and insulin-like growth factor-1, villus height in the jejunum, and villus height to crypt depth ratio were the lowest in piglets fed LL diet, whereas blood urea N concentration was the lowest and the value of lipase activity was the highest in the piglets fed SL diet. The SL diet did not affect growth performance,intestinal morphology, or serum hormone concentrations, indicating that reduced dietary N with a high Lys:CP ratio can efficiently reduce dietary N excretion without negatively affecting weaned piglets.

关键词： Protein Lysine Feeding Digestion Nutrition Genetic mapping

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Role of Hydrogen Migrations in Carbonyl Peroxy Radicals in the Atmosphere

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Chinese Journal of Chemical Physics 2019年第4期32卷 457-466,I0003页

作者： Sai-nan Wang Run-run Wu Li-ming Wang School of Chemistry & Chemical Engineering South China University of Technology Guangzhou 510640 China State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Pro- tection and Resources Utilization Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control South China University of Technology Guangzhou 510006 China

Carbonyl peroxy radicals (RC(O)O2) are the ubiquitous radical intermediates in the atmospheric oxidation of volatile organic compounds. In this work, theoretical studies are carried out to explore the role of the unimolecular H-migration in the carbonyl peroxy radicals by using quantum chemistry and kinetics calculations. The results showed that H-migration could be significant in the atmosphere at least in CH3CH2CH2C(O)O2 and (CH3)2CHCH2C(O)O2 with rates of ∽0.012 and -0.58^-1 at 298 K. Subsequent reactions of CH3CHCH2C(O)OOH would lead to the products with multi-functional groups, which might affect the aerosol formation process;while (CH3)2CCH2C(O)OOH would transform to formaldehyde and acetone in a few steps. These processes would be important for the atmospheric modelling of volatile organic compounds under low-NOx conditions.

关键词： Carbonyl peroxy radical H-migration Atmospheric oxidation

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Mixed Plantations Enhance More Soil Organic Carbon Stocks than Monocultures across China: Implication for Optimizing Afforestation Strategies

SSRN

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SSRN 2021年

作者： Xiang, Yangzhou Li, Yuan Luo, Xuqiang Liu, Ying Huang, Pei Yao, Bin Zhang, Leiyi Li, Wenli Xue, Jianming Gao, Hongjuan Li, Yonghua Zhang, Wei Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed School of Geography and Resources Guizhou Education University Guiyang550018 China State Key Laboratory of Grassland Agro-ecosystems College of Pastoral Agriculture Science and Technology Lanzhou University Lanzhou730020 China School of Biological Sciences Guizhou Education University Guiyang550018 China Institute of Desertification Studies Chinese Academy of Forestry Beijing100091 China State Forestry Administration Dunhuang Desert Ecosystem Location Research Station Dunhuang736200 China South China Botanical Garden Chinese Academy of Sciences Guangzhou510650 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Sun Yat-sen University Guangzhou510006 China Saibei Forest Farm Zhangjiakou075000 China Scion 8440 New Zealand

Forest plays an essential role in mitigation of climate change through sequencing carbon dioxide in the atmosphere. Establishment of mixed plantations is a promising means for increasing soil organic carbon (SOC) compared to monocultures. However, with rapid increase of forest area, monocultures forests largely dominate the afforestation in China. To appropriately optimize afforestation strategies and maximum subsequent potential in C sequestration in China, this study conducted a meta-analysis with 427 observations across 176 study sites from China to quantify changes in SOC stocks with mixed plantations relative to monocultures, and identify predominant drivers for SOC stocks including region distribution, climatic factors, previous land use, edaphic properties, plantation age, nitrogen-fixing tree, mixing proportion, and mixed plantation type. Results showed that mixed plantations significantly increased SOC stocks by 12% in China, and the mixing proportion should not exceed 55%. Mixed plantation type was the principal driver for the changes in SOC stocks in response to mixed plantations. Additionally, compared to monocultures, mixed plantations in barren land has the greatest potential in increasing SOC stocks, and with limited water or thermal resource, additional measures instead of mixed plantations should be explored to increase SOC stocks in north, central, and northwest of China. Overall, this study improves our knowledge of the mixed-tree-driven spatiotemporal variability on SOC storage and have valuable implications for the establishment and management of afforestation. © 2021, The Authors. All rights reserved.

关键词： Reforestation

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Merits of different dietary patterns for ensuring China’s future food security satisfying socioeconomic development and climate change adaptation

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iScience 2025年

作者： Wencong Yue Meirong Su Yanpeng Cai Qiangqiang Rong Chao Xu Yuanchao Hu Jiajia Li Shujie Yu Donghan Chen Zhongqi Liu Zhenkun Tan Zhifeng Yang Environmental Monitoring Center Ecology and Environment Bureau of Haidian District of Beijing Municipality Beijing 100089 China Research Center for Eco-Environmental Engineering Dongguan University of Technology Dongguan 523808 China Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education School of Ecology Environment and Resources Guangdong University of Technology Guangzhou 510006 China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological Engineering Guangdong University of Technology Guangzhou 510006 China School of Resource and Environmental Sciences Wuhan University Wuhan China College of Environmental Science and Engineering Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology Beijing 100124 China

Food security depends on food production exceeding consumption, which are influenced, respectively, by climate change and socio-economic development, respectively. We adopted a hybrid approach for predicting features of future food security in China. Specifically, complex interactions in food security were examined using copula-based Markov Chain Monte Carlo simulation. Crop yields per unit area were simulated with a DeNitrification-DeComposition model under four climate-change scenarios. A high shortage risk for soybean, and lower shortage risks for maize and wheat, were predicted. Compared with the extent of food security in China under other dietary patterns, the performance advantage of the Chinese dietary pattern was identified, which could mitigate crop shortage risks. The shortage risk of core crops would not be influenced greatly under the different dietary patterns. In the planning years 2025 and 2030, the shortage risks for soybean and rice would be pronounced (i.e., more than 50%), whereas those for maize and wheat would not be prominent.

关键词： Food security Uncertainty analysis Climate change scenarios Copula functions Markov Chain Monte Carlo (MCMC) simulation Dietary transitions

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