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Catalytic effect of MOF-derived transition metal catalyst FeCoS@C on hydrogen storage of magnesium

Journal of Materials Science & technology 2023年第7期138卷 59-69页

作者： Yaokun Fu Lu Zhang Yuan Li Sanyang Guo Zhichao Yu Wenfeng Wang Kailiang Ren Qiuming Peng Shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

The introduction of the heterogeneous catalysts with high activity can significantly improve hydrogen storage performance of MgH_(2),therefore,in this paper,we synthesize a carbon-supported transition metal compound,FeCoS@C derivative from ZIF-67,by utilizing the in situ formed C dispersive multiphase Mg_(2)Co,α-Fe,Co_(3)Fe_(7),and MgS to implement catalysis to MgH_(2).Noteworthily,MgH_(2)-FeCoS@C rapidly ab-sorbs 6.78 wt%H_(2)within 60 s at 573 K and can also absorb 4.56 wt%H_(2)in 900 s at 473 ***,the addition of FeCoS@C results in decreasing of the initial dehydrogenation temperatures of MgH_(2)from 620 to 550 *** dehydrogenation activation energy of MgH_(2)decreases from 160.7 to 91.9 kJ mol^(-1).Studies show that the Mg_(2)Co,α-Fe,and Co_(3)Fe_(7)act as“hydrogen channels”to accelerate hydrogen transfer due to the presence of transition metals,and MgS with excellent catalytic effect formed from MgH_(2)-FeCoS@C provides a strong and stable catalytic ***,the carbon skeleton obtained by the carbonization of ZIF-67 not only serves as a dispersion for the multiphase catalytic system,but also provides more active sites for the *** study shows that the multiphase and multiscale catalytic system provides an effective strategy for improving the hydrogen storage performance of MgH_(2).

关键词： Hydrogen storage material Magnesium hydride Heterogeneous catalyst Synergistic catalytic MOF materials

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Accelerating urban street canyon wind flow predictions with deep learning method

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建筑模拟（英文版） 2025年第4期18卷 923-936页

作者： Wai-Chi Cheng Tzung-May Fu Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China National Center for Applied Mathematics Shenzhen(NCAMS)ShenzhenGuangdong 518055China

Predicting wind flow statistics in urban areas is important for various environmental and engineering ***,building-resolved computational fluid dynamics(CFD)simulations are the most commonly used and reliable methods to simulate urban wind flows but they are time-consuming which limits their use in real ***,our objective is to develop a surrogate model based on deep learning(DL),which can be used as a faster alternative to CFD methods for urban *** proposed model hypothesis is that the spatial distributions of the time-averaged flow quantities within urban canopies are highly correlated to the local urban *** test this hypothesis,we developed a model to predict the flow in uniform urban street canyons by constructing a geometry reading filter to convert local urban geometry information around the targeted locations into a numerical array as DL model inputs.A standard feedforward DL model is then trained using large-eddy simulation(LES)results to predict the mean wind and turbulence within uniform street *** results show that the model can give fast and accurate predictions compared to LES *** prediction errors are found to range from 5.8%to 36%,and the normalized mean bias magnitudes range from 6.6×10-3 to 1.6×10-1 for the different flow *** DL model is also found to predict the flow patterns reasonably well,consistent with experimental data similar to the results of coarse-resolution *** model has the potential to be further developed into a robust and practical tool for fast urban flow predictions.

关键词： deep learning geometry reading filter large-eddy simulation neural network model urban wind flow prediction urban street canyons

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La^(3+)@BC500-S_(2)O_(8)^(2−)system for removal of sulfonamide antibiotics in water

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Journal of environmental Sciences 2024年第12期146卷 140-148页

作者： Bing Wang Dongsu Bi Juan Wang Hengbo Qiao Yalei Zhang Zheng Shen School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China State Key Laboratory of Pollution Control and Resources Reuse Key Laboratory of Yangtze River Water Environment of MOENational Engineering Research Center of Protected AgricultureShanghai Engineering Research Center of Protected AgricultureTongji UniversityShanghai 200092China

Sulfonamide antibiotics(SAs)widely used have potentially negative effects on human beings and *** and advanced oxidation methods have been exten-sively applied in SAs wastewater *** this study,compared with Al^(3+)@BC500 and Fe^(3+)@BC500,La^(3+)@BC500 for activating persulfate(S2O82−)had the best effect removal per-formance of sulfadiazine(SDZ)and sulfamethoxazole(SMX).Morphology,acidity,oxygen-containing functional groups,and loading of La^(3+)@BC500 were analyzed by techniques,in-cluding EA,BET,XRD,XPS,*** results show that with the increase of La^(3+)loading,the surface characteristics of biochar gradually changed from CaCO_(3)to LaCO_(3)*** EPR technology,it is proved that LaCO_(3)OH on the surface of La^(3+)@BC500 can not only acti-vate S2O82−to generate SO_(4)^(−)•,but also to produce•*** the optimization experiment,the optimal dosage of La^(3+)is between 0.05 and 0.2(mol/L)/*** had a good removal effect at pH(5-9),but SMX had a good removal effect only at pH=*** potential also proves that the material is more stable under acidic *** removal process of SDZ is more in accord with pseudo-first-order kinetics(R^(2)=0.9869),while SMX is more in line with pseudo-second order kinetics(R^(2)=0.9926).

关键词： Sulfadiazine Sulfamethoxazole La^(3+)@BC500 Persulfate

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Tetraethylenepentamine-functionalized magnetic mesoporous composites as a novel adsorbent for the removal Cr(Ⅲ)-ethylenediaminetetraacetic acid in complex solution

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Chinese Journal of Chemical engineering 2024年第4期68卷 16-26页

作者： Zhi Hu Jiahong Wang Tongtong Sun School of Environmental Science and Engineering Shaanxi University of Science&TechnologyXi'an 710021China Shaanxi Key Laboratory of Green Preparation and Functionalization of Inorganic Materials Xi'an 710021China

A novel tetraethylenepentamine(TEPA) functionalized magnetic mesoporous silica adsorbent(FNMs/TEPA) was prepared for the adsorption of Cr(Ⅲ)-ethylenediaminetetraacetic acid(EDTA)from wastewater. The characterization of the prepared adsorbent certified that TEPA was modified onto the magnetic mesoporous silicon(FNMs), while FNMs/TEPA maintained the ordered mesoporous and pristine magnetic properties. The batch adsorption experiments demonstrated that TEPA significantly enhanced the removal capacity of the adsorbent for Cr(Ⅲ)-EDTA. FNMs/TEPA exhibited an excellent adsorption property(13.84 mg·g-1) at p H 4.0. Even in the presence of high concentrations of coexisting ions and organic acids, the adsorption performance of FNMs/TEPA was stable. Experimental characterization and DFT demonstrated that the adsorption of Cr(Ⅲ)-EDTA was ascribed to the electrostatic interaction, hydrogen bonding, and complexation between Cr(Ⅲ)-EDTA and amino groups on the adsorbent surface. The analysis of the independent gradient model(IGM) shows that electrostatic interaction is the main mode of action in the adsorption process. Moreover, FNMs/TEPA demonstrated remarkable reusability in three regeneration cycles. These findings indicated that FNMs/TEPA possessed excellent application prospects in the disposal of wastewater containing Cr(Ⅲ)-EDTA.

关键词： TEPA functionalized magnetic mesoporous silicon Adsorption Cr(III)-EDTA Density functional theory calculations

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The short and long-term effect of polystyrene nanoplastics on nitrifying sludge at high nitrite concentrations

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Journal of environmental Sciences 2024年第1期36卷 222-231页

作者： Xiaolong Wang Jialu Huang Zhiqiang Qi Ruiqin Kang Chao Du Da Li School of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China Henan Licheng Environmental Technology Co. Ltd.Anyang 455000China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The effect of nanoplastics(NPs)on nitrite oxidation bacteria(NOB)community in treating high-strength wastewater remains unclear,which seriously affects the stability of nitrogen removal *** this study,highly active nitrifying sludge was enriched and exposed to 50nm polystyrene NPs(PS-NPs)for short-term(1,100,500,and 1000 mg/L,1.5 hr)and long-term(1,10,100 mg/L,40 days)at high nitrite *** contrast to previous studies,our results showed that the exposures to PS-NPs had little effect on nitrifying *** long-term exposure,the protein/polysaccharide ratios in extracellular polymeric substances(EPS)were positively correlated with PS-NPs concentrations(0.78–0.99).The produced reactive oxygen species(ROS)were gradually removed,and PS-NPs higher than 10 mg/L caused damage to membrane ***-term exposure for 40 days increased the community diversity and caused significant differences between the control and exposed *** control group were dominated by Nitrobacter and Exiguobacterium,while the exposure group was dominated by Bacillus,Mycobacterium,and Nitrospira.A noticeable shift in the NOB community from Nitrobacter(26.5%to 3.4%)to Nitrospira(1.61%to 14.27%)was observed.A KEGG analysis indicated a decrease in cell growth and death,cell motility and energy *** appeared that NOB could adapt to PS-NPs stress through enhanced secretion and removal of oxidative ***,this study provided new insights into the response mechanism of NOB to PS-NPs exposure.

关键词： Nanoplastics Nitrifying activity Extracellular polymeric substance(EPS) Exposure Community analysis

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CeO_(2)@MnO_(2)with strong Ce-Mn interaction activating PDS to promote in situ degradation of adsorbed tetracycline

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Journal of Rare Earths 2025年第3期43卷 490-499,I0003页

作者： Jinhui Zhang Jiawei Sun Xinfeng Zhu Jingquan Liu Linlin Chang Guofeng Li Rongfu Peng Junning Wang Libin Jiang Kai Wang Shiqiang Yin Xueping Liu Chaohai Wang Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology School of Municipal and Environmental EngineeringHenan University of Urban ConstructionPingdingshan467036China National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou510006China School of Light Industry&Chemical Engineering Dalian Polytechnic UniversityDalian116034China

A series of CeO_(2)@MnO_(2)composites was prepared by deposition-precipitation *** materials were used to activate sodium persulfate(PDS)for the oxidation of *** is found that the composites,especially the CeO_(2)@MnO_(2)-1:4 composites,exhibit better tetracycline removal rates than the pure components.X-ray diffraction(XRD),Raman and scanning electron microscopy(SEM)analyses all indicate that the composite has been successfully prepared with high purity and high *** XPS analysis shows that the strong interaction between the components promotes the electron ***,the kinetic rate constants of CeO_(2)@MnO_(2)-1:4 after 60 min are 3.8 and 12.7 times higher than pure CeO_(2)and MnO_(2),***_(2)@MnO_(2-)1:4 composite also exhibits excellent catalytic activity for individual and hybrid *** effects of wastewater matrix,pH,circulation and ion stre ngth on the degradation of tetracycline were *** is found that CeO_(2)@MnO_(2)-1:4 composite has good practical application ***_(2)@MnO_(2)composites with synergistic adsorption catalysis can activate PDS and peroxymo no sulfate(PMS)for efficient organic catalytic *** paper provides the theoretical basis and data support for the practical application of the CeO_(2)@MnO_(2)composite materials.

关键词： Tetracycline Multicomponent contamination Adsorption-catalytic synergy Anti-interference CeO_(2)@MnO_(2) Rare earths

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Flexible polyphosphazene nanocomposite films: Enhancing stability and luminescence of CsPbBr_(3) perovskite nanocrystals

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Chinese Chemical Letters 2025年第4期36卷 455-460页

作者： Husitu Lin Shuangkun Zhang Dianfa Zhao Yongkang Wang Wei Liu Fan Yang Jianjun Liu Dongpeng Yan Zhanpeng Wu State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China School of Chemistry&Chemical Engineering and Environmental Engineering Weifang UniversityWeifang 261061China

Polyphosphazene with phenoxy or 4-ester phenoxy as pendent groups are demonstrated as both ligands and host matrices for CsPbBr_(3) perovskite nanocrystals(NCs). These polymers produced fiexible nanocomposite films with excellent NCs dispersion, optical transparency and stability in various extreme conditions. Both films remained stable even after 30 days of air storage. CsPbBr_(3) /poly[bis(phenoxy phosphazene)](PBPP) delivered better air and light stability, and CsPbBr_(3) /poly[bis(4-esterphenoxy)phosphazene](PBEPP) exhibited superior water and heat resistance. CsPbBr_(3) /PBEPP showed a greater increase in fiuorescence intensity under 365 nm UV light and demonstrated a 10% luminescence increase after 96 h of water immersion and even at high temperature(150℃). These findings thus provide new insight into fiexible luminescent CsPbBr_(3) films with high stability in optoelectronic applications.

关键词： Polyphosphazene CsPbBr_(3) Quantum dots Encapsulation Luminescent properties High stability

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Geochemistry and origins of hydrogen-containing natural gases in deep Songliao Basin,China:Insights from continental scientific drilling

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Petroleum Science 2024年第2期21卷 741-751页

作者： Shuang-Biao Han Chao-Han Xiang Xin Du Lin-Feng Xie Jie Huang Cheng-Shan Wang College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing100083China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing100083China

The different reservoirs in deep Songliao Basin have non-homogeneous lithologies and include multiple layers with a high content of hydrogen *** gas composition and stable isotope characteristics vary significantly,but the origin analysis of different gas types has previously been *** on the geochemical parameters of gas samples from different depths and the analysis of geological settings,this research covers the diverse origins of natural gas in different *** gas components are mainly methane with a small amount of C_(2+),and non-hydrocarbon gases,including nitrogen(N_(2)),hydrogen(H_(2)),carbon dioxide(CO_(2)),and helium(He).At greater depth,the carbon isotope of methane becomes heavier,and the hydrogen isotope points to a lacustrine sedimentary *** increasing depth,the origins of N_(2)and CO_(2)change gradually from a mixture of organic and inorganic to *** origins of hydrogen gas are complex and include organic sources,water radiolysis,water-rock(Fe^(2+)-containing minerals)reactions,and *** shales of Denglouku and Shahezi Formations,as source rocks,provide the premise for generation and occurrence of organic ***,the deep faults and fluid activities in Basement Formation control the generation and migration of mantle-derived *** discovery of a high content of H_(2)in study area not only reveals the organic and inorganic association of natural-gas generation,but also provides a scientific basis for the exploration of deep hydrogen-rich gas.

关键词： Gas compositions Stable isotopes Gas origins Hydrogen gas Songliao Basin

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Enhancing anoxic denitrification of low C/N ratio wastewater with novel ZVI composite carriers

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Journal of environmental Sciences 2022年第2期34卷 180-191页

作者： Yanping Shi Tao Liu Hongtao Yu Xie Quan Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

External organic carbon sources are needed to provide electron donors for the denitrification of wastewater with a low COD/NO_(3)^(-)-N(C/N)ratio,increasing the treatment *** economic strategy is to enhance the bioactivity and/or biodiversity of denitrifiers to efficiently utilize organic substances in *** this study,novel zero-valent iron(ZVI)composite carriers were prepared and implemented in a suspended carrier biofilm reactor to enhance the bioactivity and/or biodiversity of *** the influent C/N ratio of 4(COD was 179.5±5.0 mg/L and TN was 44.2±0.8 mg/L),COD and TN removal efficiencies were 85.1%and 66.4%,respectively,in the reactors filled with 3 wt%ZVI composite *** contrast,COD and TN removal efficiencies were 70.4%and 55.3%,respectively,in the reactor filled with conventional high-density polyethylene(HDPE)biofilm *** biofilm formation on the 3 wt%ZVI composite carriers was optimized due to its higher roughness(surface square roughness increased from 76.0 nm to 93.8 nm)and favorable hydrophilicity(water contact angle dropped to 72.5°±1.4°from 94.3°±3.2°)compared with the HDPE biofilm *** addition,heterotrophic denitrifiers,Thauera and Dechloromonas,were enriched,whereas autotrophic denitrifiers,Raoultella and Thiobacillus,exhibited high relative abundance in the biofilm of ZVI composite *** coexistence of heterotrophic denitrifiers and autotrophic denitrifiers on the surface of ZVI composite carriers provided mixotrophic metabolism of denitrification(including heterotrophic and iron-based autotrophic),thereby ensuring effective denitrification for wastewater with a low C/N ratio without external organic carbon source addition.

关键词： ZVI Biofilm carrier Low C/N ratio Integrated floating fixed-film and activated sludge(IFFAS) Denitrification

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Red mud-based catalysts for the catalytic removal of typical air pollutants: A review

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Journal of environmental Sciences 2023年第5期127卷 628-640页

作者： Jiawei Chen YaoWang Zhiming Liu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Center for Environmental Pollution Control and Resource Recovery Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Red mud,as a solid waste produced during the alumina production,can cause severe ecoenvironmental pollution and health risks to ***,the resourcing of this type of solid waste is an effective way for the sustainable *** paper reviews the recent progress on red mud-based catalysts for the removal of typical air pollutants,such as the catalytic reduction of nitrogen oxides(NO_(x))by NH_(3)(NH_(3)-SCR)and the catalytic oxidation of CO and volatile organic compounds(VOCs).The factors influencing the catalytic performance and the structure–activity relationship have been *** prospects and directions for the development of such catalysts are also *** review would benefit for the high value-added utilizations of red mud in mitigating atmospheric pollutions.

关键词： Red mud Catalyst NH_(3)-SCR Catalytic oxidation Air pollutants

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