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Adsorptive-photocatalytic removal of tetracycline from wastewater by Fe3O4- and SnO2-containing biochar nanocomposites

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BIOCHAR 2025年第1期7卷 1-19页

作者： Zhang, Chuchen zhao, shuwen Huang, Qilan Liu, Jianqiao Zhang, Qianru Chinese Acad Agr Sci Inst Agr Resources & Reg Planning State Key Lab Efficient Utilizat Arid & Semiarid A 12 Zhongguancun South St Beijing 100081 Peoples R China Dalian Maritime Univ Coll Informat & Sci Technol Dalian 116026 Peoples R China

Tetracycline poses a major threat to the aquatic environment and human health, and there is an urgent need for a green, efficient and recyclable technological means to remove its negative effects. To address this need, three Fe3O4@SnO2 modified wheat straw biochar nanocomposites with different Fe/Sn content ratios (Fe/Sn = 0.5, Fe/Sn = 1, and Fe/Sn = 2) were prepared by pyrolysis. The adsorption and degradation properties and related mechanisms of Fe3O4@SnO2 modified wheat straw biochar nanocomposites were investigated by adsorption, degradation and free radical quenching experiments, as well as EPR analysis. The removal of tetracycline by Fe3O4@SnO2 modified wheat straw biochar nanocomposites (Fe/Sn = 0.5) at pH 7.0 within 3 h was up to 91.80%, which is in accordance with the quasi-primary kinetic model. Under the interference of inorganic anions and cations, the removal of tetracycline by the composites was not affected by the coexisting ions except Ca2+, Mg2+, HCO3- and CO32-. The composites were able to efficiently remove tetracycline from pharmaceutical wastewater with a removal rate of 82.33%. It was found that the composites could be reused at least five times. FTIR, XPS combined with DFT calculations elucidated the mechanism of tetracycline removal by the composites, with center dot OH and center dot O2- being the main substances involved in the photodegradation of tetracycline, the incorporation of manganese dioxide quantum dots enhancing the response to visible light, and the incorporation of magnetic nanoparticles resulting in rapid charge transfer and improved spatial separation of photogenerated carriers. The modification measures significantly increased the specific surface area of the biochar and enhanced the adsorption and photocatalytic properties. Based on these studies, the developed nanocomposites provide a new idea for the removal of antibiotics from pharmaceutical wastewater.

关键词： Biochar nanocomposites Tetracycline Photocatalysis DFT calculation

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Effect on In³⁺ co-doping on photoluminescence and scintillation properties of LYSO:Ce crystal

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PHYSICA B-CONDENSED MATTER 2025年 699卷

作者： Yu, Jiaqi Li, Mingqing zhao, shuwen Xue, Zhongjun Ding, Dongzhou Feng, He Shanghai Univ Sch Mat Sci & Engn Shanghai 200444 Peoples R China Chinese Acad Sci Shanghai Inst Ceram Shanghai 201800 Peoples R China

In this work, a series of LYSO:0.03 at.% Ce,xat.%In (x = 0, 0.001, 0.005 and 0.01) crystals were successfully grown for the first time by the optical floating zone (FZ) method. The effect of In3+ co-doping on photoluminescence and scintillation properties of LYSO:Ce scintillation single crystal was investigated. It was found that at x = 0.001, the overall scintillation performance was optimized. This was attributed to the fact that In3+ co-doping reduces the concentration of Ce2 emission center and accelerates the photoluminescence decay time of Ce3+. The temperature dependence of photoluminescence of LYSO:Ce,xat.%In samples was also investigated. Combined with density functional theory calculation, the phenomenon of In3+ co-doping leading to a decrease in quenching temperature of decay time was explained in terms of both crossover relaxation and introduction of impurity energy levels.

关键词： Scintillation crystal LYSO:Ce In co-doping Figure of merit Temperature dependence

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Incorporating SnSx species for electroreduction of CO2 towards formate

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APPLIED SURFACE SCIENCE 2025年 689卷

作者： Yang, Yibing Yang, Xiao zhao, shuwen Liu, Zhipeng Xiao, Yi Han, Lili Fuzhou Univ Sch Chem Fuzhou 350108 Fujian Peoples R China Chinese Acad Sci Fujian Inst Res Struct Matter State Key Lab Struct Chem Fuzhou 350002 Fujian Peoples R China Ordos Lab Ordos 017000 Inner Mongolia Peoples R China

Electrocatalytic carbon dioxide reduction (ECR) is emerging as a highly attractive approach for carbon neutrality. A heterogeneous structure constructed with multi-phase SnSx can alter electronic structure and form synergistic effects, facilitating the catalytic process. In this study, a multi-phase SnSx was synthesized incorporating Sn2S3 with SnS2. Theoretical calculation results indicate that the synergistic interactions between the two phases effectively alters the electronic structure of Sn2S3/SnS2, enhancing its conductivity and optimizing the adsorption of key intermediates in the ECR process, particularly *OCHO and *COOH. This ultimately facilitates a significant reduction in the energy barriers of the reaction's rate-determining step. Therefore, the conversion of CO2 to formate is significantly enhanced, and the synthesized Sn2S3/SnS2 catalyst demonstrates outstanding activity and selectivity, achieving a maximum Faradaic efficiency of 84.3% for formate at-1.1 V vs. RHE, while maintaining stability over 14 h of continuous electrolysis. This study advances the understanding of the synergistic interactions between the two phases in ECR for formate production, offering valuable insights for the design and development of efficient ECR electrocatalysts.

关键词： Formate Catalytic mechanism Multi-phase SnSx Electrocatalytic CO2 reduction

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Analysis of floating city design solutions in the context of carbon neutrality-focus on Busan Oceanix City

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ENERGY REPORTS 2022年 8卷 153-162页

作者： Yang, Huimin zhao, shuwen Kim, Chulsoo Pukyong Natl Univ Yongso Ro 45 Busan 48513 South Korea Shenyang Ligong Univ 6 Nanping Middle Rd Shenyang Liaoning Peoples R China

Excessive carbon emissions are causing global climate change, leading to higher temperatures and continued sea level rise, affecting all the world's seaside cities. Concentrated population migration to large cities, flooding and rising sea levels are limiting the spatial growth potential of coastal urban water bodies. In response to climate change, the city of Busan, where sea levels are set to rise by 70.6 cm by 2100, is actively promoting the development of marine cities, and the development of marine space has become a hotspot. In response, the United Nations has proposed the world's first floating city design scheme, Oceanix City. The aim of this thesis is to build a new type of carbon neutral floating city, by reviewing existing research papers on floating cities and carbon neutrality, analyzing in depth the carbon neutral design elements of the scheme, exploring the possibility of creating a zero carbon zone in the ocean and finally proposing alternative energy sources and design methods for marine cities. Using a case study approach, this thesis analyses carbon sequestration and carbon emissions, providing a theoretical basis for the design of future carbon-neutral floating cities with positive implications for achieving carbon neutrality. The study also proposes macro design criteria for a carbon neutral vision for floating cities, providing a theoretical basis and reference for the development of future floating cities.(c) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/4.0/).

关键词： Carbon neutrality Floating urban Oceanix City Urban design

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FM-3DFR: Facial Manipulation-Based 3-D Face Reconstruction

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IEEE TRANSACTIONS ON CYBERNETICS 2024年第1期54卷 209-218页

作者： zhao, shuwen Wang, Xinming Zhang, Dinghuang Zhang, Gongyue Wang, Zhiyong Liu, Honghai Univ Portsmouth Sch Comp Portsmouth PO1 3HE England Harbin Inst Technol Shenzhen State Key Lab Robot & Syst Shenzhen 518055 Peoples R China Shanghai Jiao Tong Univ State Key Lab Mech Syst & Vibrat Shanghai 200240 Peoples R China

3-D Morphable model (3DMM) has widely benefited 3-D face-involved challenges given its parametric facial geometry and appearance representation. However, previous 3-D face reconstruction methods suffer from limited power in facial expression representation due to the unbalanced training data distribution and insufficient ground-truth 3-D shapes. In this article, we propose a novel framework to learn personalized shapes so that the reconstructed model well fits the corresponding face images. Specifically, we augment the dataset following several principles to balance the facial shape and expression distribution. A mesh editing method is presented as the expression synthesizer to generate more face images with various expressions. Besides, we improve the pose estimation accuracy by transferring the projection parameter into the Euler angles. Finally, a weighted sampling method is proposed to improve the robustness of the training process, where we define the offset between the base face model and the ground-truth face model as the sampling probability of each vertex. The experiments on several challenging benchmarks have demonstrated that our method achieves state-of-the-art performance.

关键词： Faces Solid modeling Shape Image reconstruction Face recognition Data models Computational modeling 3-D dense face alignment 3-D face reconstruction expression synthesis facial manipulation

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Bimetallic co-doped CoP nanoflower arrays for efficient and stable overall water splitting

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2024年第PartA期51卷 276-284页

作者： zhao, Yifan zhao, Xuan Zhou, Yao zhao, shuwen Chen, Ji Dai, Ruijie Zhou, Weijie Yang, Peizhi Zhang, Hua Chen, Anran Yunnan Univ Sch Mat & Energy Kunming 650091 Peoples R China Univ Edinburgh Sch Engn South Bridge Edinburgh EH8 9YL Scotland Yunnan Normal Univ Key Lab Adv Tech & Preparat Renewable Energy Mat Minist Educ Kunming 650092 Peoples R China

It is vital to develop efficient earth-abundant bifunctional electrocatalysts for water split-ting to mitigate the global energy crisis and environmental pollution. Here, Mn and W dual transition metal co-doped CoP nanoflower arrays supported on nickel foam (Mn-W-CoP/NF) have been synthesized via the hydrothermal method and chemical vapor deposition. The unique nanoflower-type structure of Mn-W-CoP/NF facilitated high reactive-site exposure and efficient charge transfer. Consequently, Mn-W-CoP/NF exhibited excellent bifunctional electrocatalytic activity in alkaline electrolytes, with low overpotentials of 95.8 and 229.2 mV for the hydrogen evolution reaction and oxygen evolution reaction, respec-tively, at 10 mA cm(-2). Furthermore, it could be used to construct a two-electrode water-splitting electrolyzer exhibiting stable water splitting at a low cell voltage (1.57 V) at 10 mA cm(-2). This study could guide the design and development of efficient bifunctional electrocatalysts for large-scale water-splitting applications. (c) 2022 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.

关键词： Electrocatalysts

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Efficient recovery of rare metal lanthanum from water by MOF-modified biochar: DFT calculation and dynamic adsorption

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BIOCHAR 2025年第1期7卷 1-17页

作者： Huang, Qilan Zhang, Qianru zhao, shuwen Zhang, Chuchen Guan, Huixin Liu, Jianqiao Chinese Acad Agr Sci Inst Agr Resources & Reg Planning State Key Lab Efficient Utilizat Arid & Semiarid A 12 South Zhongguancun St Beijing 100081 Peoples R China Dalian Maritime Univ Coll Informat Sci & Technol 1 Linghai Rd Dalian 116026 Peoples R China

In this research, a novel metal-organic framework-modified biochar composite (MIL-88b@BC) was created for the first time by modifying rice husk biochar using the excellent adsorption properties of metal-organic framework (MOF), as well as reducing the solubility of MOF using biochar as a substrate, aiming to improve the understanding of the adsorption characteristics of rare-earth metal recycling and to predict its adsorption mechanism. Density functional theory (DFT) computations allowed for rationally constructing the adsorption model. According to DFT calculations, the primary processes involved in the adsorption of La3+ were pi-pi interaction and ligand exchange, wherein the surface hydroxyl group played a crucial role. MIL-88b@BC interacted better with La3+ than biochar or MOF did. Accompanying batch tests with the theoretical conjecture's verification demonstrated that the pseudo-second-order model and the Langmuir model, respectively, provided a good fit for the adsorption kinetics and isotherms. The maximum La3+ adsorption capacity of MOF@BC (288.89 mg g-1) was achieved at pH 6.0, which was significantly higher than the adsorbents' previously documented adsorption capacities. Confirming the DFT estimations, the adsorption capacity of BC@MIL-88b for La3+ was higher than that of MOF and BC. Additionally, MOF@BC can be recycled at least four times. To mitigate the growing scarcity of rare earth elements (REEs) and lessen their negative environmental effects, this work laid the path for effectively treating substantial volumes of wastewater produced while mining *** novel composite adsorbent was prepared by MOF and biochar in situ growth *** adsorption mechanism was innovatively investigated based on DFT *** exchange and La-O-Fe formation dominated in lanthanide ion removal.

关键词： Biochar Fe-MOF Adsorption Rare earth element Density functional theory

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Series of New Alkali Metal Hafnium-Based Iodates A2Hf(IO3)6 (A = K, Rb, Cs) and Isomorphic Ba2Zn(IO3)6 with Large Birefringence

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CRYSTAL GROWTH & DESIGN 2025年第7期25卷 2146-2154页

作者： zhao, shuwen Xue, Zhiyong Wen, Xin Yan, Yuchen Chen, Jindong Peng, Guang Ye, Ning Tianjin Univ Technol Inst Funct Crystal State Key Lab Crystal Mat Tianjin Key Lab Funct Crystal Mat Tianjin 300384 Peoples R China Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China Shandong Univ Inst Crystal Mat Jinan 250100 Peoples R China

Iodate is an important class of optoelectronic functional materials, however, only a few hafnium-based iodates have been reported at present. Herein, a series of alkali metal hafnium-based iodates A2Hf(IO3)6 (A = K, Rb, Cs) and isomorphic Ba2Zn(IO3)6 were synthesized by the hydrothermal method. These four crystals all crystallized in the trigonal system with an R 3 space group. Both Hf4+ and Zn2+ are six-coordinated with six IO3 - groups, forming a petal-shaped arrangement. Based on millimeter-sized crystals, their ultraviolet cutoff edges were measured as 329-347 and 288 nm, respectively. Theoretical calculation shows that they possess a large birefringence of 0.092-0.111@1064 nm. This work not only provides potential birefringent materials but also enriches the iodate system.

关键词： Birefringence

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Salt stress-induced changes in soil metabolites promote cadmium transport into wheat tissues

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Journal of Environmental Sciences 2023年第5期127卷 577-588页

作者： Lifu Wang Luyao Qin Xiaoyi Sun shuwen zhao Lei Yu Shibao Chen Meng Wang Key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China

Soil salinity is known to improve cadmium(Cd)mobility,especially in arid ***,the mechanisms involved in how salt stress-associated metabolic profiles participate in mediating Cd transport in the soil-plant system remain poorly *** study was designed to investigate the effects of salinity-induced changes in soil metabolites on Cd *** salts in different combinations according to molar ratio(NaCl:Na_(2)SO_(4)=1:1;NaCl:Na_(2)SO_(4):NaHCO_(3)=1:2:1;NaCl:Na_(2)SO_(4):NaHCO_(3):Na_(2)CO_(3)=1:9:9:1;NaCl:Na_(2)SO_(4):NaHCO_(3):Na_(2)CO_(3)=1:1:1:1)were applied to the Cd-contaminated soils,which increased soil Cd availability by 22.36%and the Cd content in wheat grains by 36.61%,compared to the *** stress resulted in soil metabolic reprogramming,which might explain the decreased growth of wheat plants and increased Cd transport from the soil into wheat *** example,down-regulation of starch and sucrose metabolism reduced the production of sugars,which adversely affected growth;up-regulation of fatty acid metabolism allowed wheat plants to maintain a normal intracellular environment under saline conditions;up-regulation of the tricarboxylic acid(TCA)cycle was triggered,causing an increase in organic acid synthesis and the accumulation of organic acids,which facilitated the migration of soil Cd into wheat *** summary,salt stress can facilitate Cd transport into wheat tissues by the direct effect of salt-based ions and the combined effect of altered soil physicochemical properties and soil metabolic profiles in Cd-contaminated soils.

关键词： Saline stress Cadmium availability Wheat growth Metabolite profile Rhizosphere

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Research Literature Review on Mongolian Heroic Epic Jangar(1978-2023)

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Psychology Research 2023年第8期13卷 331-349页

作者： zhao shuwen Inner Mongolia University HohhotChina

There is abundant research on the epic Jangar,which involves many fields such as literature,culture,document,*** cross-study between Jangar and different disciplines boosts its continued vitality in the contemporary *** research achievements are as *** comparative research is remarkable and the linkage development trend with domestic and foreign literature is ***,multi-channel cultural research is concurrent with steadily advanced source exploration,and the research field has expanded under multidisciplinary *** achievements have been made in Jangar and Jangarology,and the research on epic development and literature collation has attracted much ***,the expansion of theoretical construction and the innovation of communication methods flourish the research on ***,as for the current research situation,there are still some challenges,such as divides in basic problems,insufficient in-depth and comprehensive research fields,and hardships in implementing the inheritance and protection of intangible cultural heritage.

关键词： Jangar heroic epic literature review

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