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3D-printed MoS_(2)/Ni electrodes with excellent electro-catalytic performance and long-term stability for dechlorination of florfenicol

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Journal of Environmental Sciences 2024年第3期137卷 420-431页

作者： Jianhui Xu Pengxu Wang Shenggui Chen Lei Li Dan Li Yunfei Zhang Qi Wu Jinhong Fan LumingMa School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China School of Art and Design Guangzhou Panyu PolytechnicGuangzhou 511483China National Engineering Research Center for Urban Pollution Control State Key Laboratory of Pollution Control and Resources ReuseCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China Dongguan Institute of Science and Technology Innovation Dongguan University of TechnologyDongguan 523808China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Here,we report the production of 3D-printed MoS_(2)/Ni electrodes(3D-MoS_(2)/Ni)with longterm stability and excellent performance by the selective laser melting(SLM)*** a cathode,the obtained 3D-MoS_(2)/Ni could maintain a degradation rate above 94.0%for forfenicol(FLO)when repeatedly used 50 times in *** also found that the removal rate of FLO by 3D-MoS_(2)/Ni was about 12 times higher than that of 3D-printed pure Ni(3D-Ni),attributed to the improved accessibility of H^(*).In addition,the electrochemical characterization results showed that the electrochemically active surface area of the 3D-MoS_(2)/Ni electrode is about 3-fold higher than that of the 3D-Ni electrode while the electrical resistance is 4 times *** on tert-butanol suppression,electron paramagnetic resonance and triple quadrupole mass spectrometer experiments,a“dual path”mechanism and possible degradation pathway for the dechlorination of FLO by 3D-MoS_(2)/Ni were ***,we also investigated the impacts of the cathode potential and the initial pH of the solution on the degradation of ***,this study reveals that the SLM 3D printing technique is a promising approach for the rapid fabrication of high-stability metal electrodes,which could have broad application in the control of water contaminants in the environmental field.

关键词： 3D-print Electroreduction MoS_(2)/Ni Antibiotic Florfenicol

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Biomimetic preparation of ternary heterogeneous catalyst derived from biopolymer in biological sludge and synergistic effects in Fenton process

Biomimetic preparation of ternary heterogeneous catalyst der...

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2018 International Conference on Novel Functional Materials, ICNFM 2018

作者： Oanh, Nguyen Thi Zhang, Jingyi Asgodom, Michael Engda Yan, Mei Xie, Huifang Qu, Hongxia Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing Jiangsu Province210094 China School of Chemical Engineering Nanjing University of Science and Technology Nanjing Jiangsu Province210094 China

Biopolymer (BioP) was extracted from waste activated sludge and the ternary catalyst BioP@PANI@Fe3O4 was prepared by biomimetic method. control experiments proved the synergistic effects of the components in BioP@PANI@Fe3O4. The degradation of high concentration of model pollutant proved its good performance as the heterogeneous Fenton *** high utilization efficiency of H2O2 and wide oprational pH range showed the promising application of BioP@PANI@Fe3O4 in the oxidative degradation of organic pollutants. The possible reaction mechanism on the surface of BioP@PANI@Fe3O4 lies in that PANI provide the acidic condition and the initially generated = Fe(II) species react with H2O2 to generate •OH, which destroy the organic dyes adsorbed onto catalyst surface. The redox process Fe(III)→Fe(II) take place easily due to convenient electro transfer in PANI and reduction power of functional groups in BioP. © The Authors, published by EDP Sciences, 2018.

关键词： Magnetite

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Effect of Al2O3 doping on the structure and performance of an Al2O3/Fe2O3 catalyst for mercury oxidation

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Journal of Environmental Sciences 2020年第4期32卷 138-145页

作者： Ruihui Liu Tingyu Zhu Li Tong Wenqing Xu School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Research Center for Process Pollution Control National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China Department of Air Pollution Control Beijing Municipal Institute of Labor ProtectionBeijing 100054China

In this study,the thermal stability of a Fe2 O3 catalyst for mercury oxidation was significantly improved by doping with Al2 *** 1 hr,the catalyst doped with 10 wt.%Al2 O3 still exhibited a mercury conversion efficiency of 70.9%,while the undoped sample even lost its catalytic *** with Al2 O3 retarded the collapse of the catalyst mesoporous structure during high-temperature calcination,and the doped samples maintained a higher specific surface area,smaller pore size,and narrower pore size *** electron microscope images revealed that after calcination at 350℃,the average size of the catalyst grains in Fe2 O3 was 23.4 nm;however,the corresponding values for 1%Al2 O3/Fe2 O3,3%Al2 O3/Fe2 O3,and 10%Al2 O3/Fe2 O3 were only 13.3,7.1,and 4.7 nm,*** obtained from X-ray diffraction and thermogravimetry coupled with differential scanning calorimetry confirmed that doping with Al2 O3 also retards the crystallization of the catalysts at high temperature,constraining catalyst grains to a smaller size.

关键词： Mercury Catalytic oxidation Fe2O3 Al2O3 Thermal stability

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Facilitated biological reduction of nitroaromatic compounds by reduced graphene oxide and the role of its surface characteristics

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Scientific Reports 2016年第1期6卷 1-10页

作者： Li, Lei Liu, Qi Wang, Yi-Xuan Zhao, Han-Qing He, Chuan-Shu Yang, Hou-Yun Gong, Li Mu, Yang Yu, Han-Qing CAS Key Laboratory of Urban Pollutant Conversion Collaborative Innovation Centre of Suzhou Nano Science and Technology Department of Chemistry University of Science and Technology of China Hefei China Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology Nanjing Jiangsu Province 210094 China

How reduced graphene oxide (RGO) mediates the reductive transformation of nitroaromatic pollutants by mixed cultures and the role of its surface characteristics were evaluated in this study. Different electron donors were applied to investigate the interaction between RGO and anaerobic microbes. Moreover, the influence of the surface properties of RGO on biological nitroaromatic removal was further elucidated. The results show that RGO could achieve an approximate one-fold rate increase of nitrobenzene reduction by mixed culture with glucose as an electron donor. Selective elimination of oxygen moieties on the RGO surface, such as quinone groups, decreased the nitrobenzene transformation rate, whereas doping nitrogen into the RGO framework exhibited a positive effect. The study indicates that graphene-based carbon nanomaterials have the potential to accelerate the biological transformation of nitroaromatic compounds and that the functionalization of these carbon nanomaterials, especially through surface modification, would further enhance the conversion efficiency of contaminants.

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Dynamic Active Sites in Bi_(5)O_(7)I Promoted by Surface Tensile Strain Enable Selective Visible Light CO_(2)Photoreduction

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Research 2023年第1期2022卷 301-311页

作者： Xian Shi Xing'an Dong Yanjuan Sun Shihan Zhang Fan Dong Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of EnvironmentZhejiang University of TechnologyHangzhou 310014China

Surface defects with abundant localized electrons on bismuth oxyhalide catalysts are proved to have the capability to capture and activate CO_(2).However,bismuth oxyhalide materials are susceptible to photocorrosion,making the surface defects easily deactivated and therefore losing their function as active *** of deactivation-resistant surface defects on catalyst is essential for stable CO_(2)photoreduction,but is a universal *** this work,the Bi_(5)O_(7)I nanotubes with surface tensile strain are synthesized,which are favorable for the visible light-induced dynamic I defects *** CO_(2)molecules absorbed on I defects are constantly reduced by the incoming photogenerated electrons from I-deficient Bi_(5)O_(7)I nanotubes and the successive protonation of CO_(2)molecules is thus highly promoted,realizing the selective CO_(2)conversion process via the route of CO_(2)-COOH^(-)-*** efficient and stable photoreduction of CO_(2)into CO with 100%selectivity can be achieved even under visible light(>420 nm)irradiation benefited from the dynamic I defects as active *** results presented herein demonstrate the unique action mechanism of light-induced dynamic defects during CO_(2)photoreduction process and provide a new strategy into rational design of deactivation-resistant catalysts for selective CO_(2)photoreduction.

关键词： visible bismuth rational

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In situ synthesis of oxygen-doped carbon quantum dots embedded in MIL-53(Fe) for efficient degradation of oxytetracycline

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Environmental Science and pollution Research 2024年第18期31卷 26686-26698页

作者： Du, Chunyan Lv, Yinchu Yu, Hanbo Zhang, Yin Zhu, Hao Dong, Wei Zou, Yulv Peng, Huaiyuan Zhou, Lu Wen, Xiaofeng Cao, Jiao Jiang, Jingyi School of Hydraulic and Environmental Engineering Changsha University of Science & ampTechnology Changsha410114 China Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province Changsha410114 China Engineering and Technical Center of Hunan Provincial Environmental Protection for River-Lake Dredging Pollution Control Changsha410114 China

Introducing carbon quantum dots (CQDs) into photocatalysts is believed to boost the charge transfer rate and reduce charge complexation. Doping heteroatoms such as N, S, or P enable CQDs to have an uplifting electron transfer capability. However, the application of oxygen-doped CQDs to improve the performance of photocatalysts has rarely been reported. Herein, a type of carbon-oxygen quantum dots (COQDs) was in situ embedded into MIL-53(Fe) to aid peroxydisulfate (PDS)-activated degradation of oxytetracycline (OTC) under visible light irradiation. The successful embedding of COQDs was confirmed by XRD, FT-IR, XPS, SEM, and TEM techniques. Photoelectrochemical testing confirmed its better performance. The prepared COQDs1/MIL-53(Fe) showed 88.2% decomposition efficiency of OTC in 60 min, which was 1.45 times higher than that of pure MIL-53(Fe). In addition, the performance of the material was tested at different pH, OTC concentrations, catalyst dosing, and PDS dosing. It was also subjected to cyclic testing to check stability. Moreover, free radical trapping experiments and electron paramagnetic resonance were conducted to explore the possible OTC deterioration mechanism. Our work provides a new idea for the development of MOFs for water treatment and remediation. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Wastewater treatment

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High photocatalytic activity of magnetically separable manganese ferrite - Graphene heteroarchitectures

High photocatalytic activity of magnetically separable manga...

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作者： Fu, Yongsheng Xiong, Pan Chen, Haiqun Sun, Xiaoqiang Wang, Xin Key Laboratory for Soft Chemistry and Functional Materials Nanjing University of Science and Technology Ministry of Education Nanjing 210094 China Key Laboratory of Fine Petrochemical Engineering Changzhou University Changzhou 213164 China Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse Nanjing University of Science and Technology Nanjing 210094 China

A simple and straightforward strategy was developed to fabricate magnetically separable MnFe2O4-graphene photocatalysts with differing graphene content. It was found that graphene sheets were fully exfoliated and decorated with MnFe2O4 nanocrystals having an average diameter of 5.65 nm and a narrow particle size distribution. It is very interesting that, although MnFe2O4 alone is photocatalytically inactive under visible light irradiation, the combination of MnFe2O4 nanoparticles with graphene sheets leads to high photocatalytic activity for the degradation of methylene blue under visible light irradiation. The strong magnetic property of MnFe2O4 nanoparticles can be used for magnetic separation in a suspension system, and therefore it does not require additional magnetic components as is the usual case. Consequently, the MnFe2O4-graphene system becomes a dual function photocatalyst. The significant enhancement in photoactivity under visible light irradiation can be ascribed to the reduction of graphene oxide (GO), because the photogenerated electrons of MnFe2O4 can transfer easily from the conduction band to the reduced GO, effectively preventing a direct recombination of electrons and holes. Hydroxyl radicals play the role of main oxidant in the MnFe2O4-graphene system, and the radicals' oxidation reaction is obviously dominant. © 2011 American Chemical Society.

关键词： Iron compounds

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Application of a new reagent O-(2-methylpropyl) N-prop-2-enylcarbamothioate in industrial purification of zinc sulfides: Mechanistic study

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Minerals Engineering 2025年 231卷

作者： Zhang, Hongliang Sun, Wei Wang, Fangshuo Xie, Zhenhui Zeng, Jianxi Hu, Zhen Lin, Shangyong School of Minerals Processing and Bioengineering Central South University Changsha410083 China Huangshaping Mining of Hunan Nonferrous Metals Stock Company Chenzhou424421 China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and Technology Wuhuan430081 China Zhongyuan Critical Metals Laboratory Zhenzhou450001 China State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming650093 China

Zinc sulfides, as crucial resources for obtaining metal zinc, frequently coexisting with pyrite and being separated in alkaline pulp. However, the alkaline pulp poses a significant environmental burden. In response, the alkali-free zinc beneficiation reagent system is developed. Herein, findings from solution chemistry analysis favors the classical surface deposition mode of activator Cu(II) on sphalerite. However, adsorption capacity studies reveal that this mode is exclusive to alkaline pulp with pH exceeding 9.5. In neutral pulp, Cu(II) prefers the ion-exchange adsorption mode. DFT calculations further underscore that the Cu(II) ion-exchanged on sphalerite serves as a target for the interfacial adsorption of collector O-(2-methylpropyl) N-prop-2-enylcarbamothioate (MPECT). Notably, the energy selectivity index (ESI) for the adsorption of MPECT and H2O molecule at the Cu target is 15.63 %, significantly surpassing the 3.82 % observed in direct adsorption at the Zn site. In addition, XPS confirmed that after the modification of the sphalerite by Cu(II), some of the surface-attached Cu2+ cations were reduced to Cu+ cations by S2− anions. This valence state composition, which is similar to that of covellite, facilitates the interfacial adsorption of MPECT. This work sheds a solid theoretical foundation and practical reference for the alkali-free beneficiation of zinc sulfide minerals. © 2025

关键词： Metal analysis

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Fe/BC co-conditioners with environmental and economic benefits on composting:reduced NH_(3)emissions and improved fertilizer quality

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Biochar 2024年第1期6卷 50-65页

作者： Jixiang Wang Huifang Xie Jun Wu Weijiang He Xi Zhang Junxia Huang Yanfang Feng Lihong Xue Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China. Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China. Key Laboratory of Integrated Regulation and Resources Development of Shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNanjing 210098China.

The significant volatilization of NH_(3)during aerobic composting causes nitrogen(N)losses and environmental *** iron(Fe)and biochar(BC)can influence the N conversion process in *** application can delay the maturation of materials,while biochar can enhance the quality of organic *** combination of these two conditioners may help decrease NH_(3)emissions and improve organic fertilizer ***,this study investigates the effects of different doses of FeCl_(3)and BC on NH_(3)emissions and organic fertilizer quality during *** results demonstrated that Fe/BC co-conditioners reduced the accumulation of NH_(3)emissions during composting by 11.1-48.2%,increased the total nutrient content by 0.6-15.3%,and enhanced economic and environmental benefits by 0.1-23.6$t^(−1).At the high-temperature stage of composting,Fe/BC co-conditioners decreased the pH by 0.3-1.2,but there was no significant difference compared to the control at the end of composting,and they did not affect compost *** structural equation model analysis suggested that the reduction in NH_(3)emis-sions was related to ammonia-oxidizing bacteria(AOB),NH_(4)^(+)-N,and total nitrogen(TN).As a result,the Fe/BC co-conditioners reduced NH_(3)emissions by lowering the pH at the beginning of composting and increasing the content of NH_(4)^(+)-*** study concludes that Fe/BC co-conditioners could complement each other to significantly reduce NH_(3)emissions and improve the quality of organic fertilizers.

关键词： Aerobic composting Biochar Organic fertilizer NH_(3)emissions FeCl_(3)

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Steam disinfection enhances bioaccessibility of metallic nanoparticles in nano-enabled silicone-rubber baby bottle teats,pacifiers,and teethers

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Journal of Environmental Sciences 2024年第2期136卷 161-171页

作者： Yu Su BinWang Xin Tong Shuchuan Peng Sijin Liu Baoshan Xing Rong Ji State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

Nano-enabled silicone-rubber articles for feeding or chewing could be a source of metallic nanoparticles(NPs)directly exposed to infants and young ***,the impact of steam disinfection on release of NPs and the related potential risks to children's health are ***,we investigated contents and form of Ag and Zn in 57 nano-enabled silicone-rubber baby bottle teats,pacifiers,and teethers of seven countries and examined the impacts of steam disinfection on in vitro bioaccessibility(IVBA)of Ag and Zn in the *** 89%articles had a mixture of Ag-and Zn-containing NPs and the teethers had relatively high Ag and Zn contents(up to 501 and 254μg/g,respectively).Steam disinfection caused rubber decomposition into micro(nano)plastics(0.54-15.7μm)and NP release from the interior of bulk rubber and micro-sized plastics,thus enhancing the IVBA of Ag and Zn by up to 5.5 *** findings provide insights into mechanisms for NP release by steam *** oral exposure risk assessment suggested low health concerns on individual metal release,our study points out the need to assess the potential health risks of child co-exposure to metallic NPs and micro(nano)plastics.

关键词： Silicone rubber Metallic nanoparticles Micro(nano)plastics Bioaccessibility Children's health

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