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Peracetic acid catalytic activation using Co_(3)O_(4) nanocluster decorated graphitic carbon nitride for cefapirin degradation in water

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Science China(Technological Sciences) 2024年第10期67卷 3103-3115页

作者： YIN ShiMei GAO YiXuan CHEN Long LI Fan LIU XiaoNa QI Fei LIU Wen Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Key Laboratory of Water and Sediment Sciences(Ministry of Education) College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China School of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems Peking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences Peking UniversityBeijing 100871China

This study innovated cobalt-based catalytic nanocomposites(CCNs)for the heterogeneous activation of peracetic acid(PAA),a green and efficient advanced oxidation process for removing antibiotics from *** Co_(3)O_(4) catalysts exhibit limited activity due to stable electronic *** overcome this,CCNs were synthesized using a one-step condensation method,incorporating a size control strategy that anchors Co_(3)O_(4) nanoclusters within 4‒5 nm onto six-fold cavity of g-C3N4,simultaneously modifying the coordination environment of *** alteration significantly enhances the adsorption energy of PAA and catalytic activity compared to commercial Co_(3)O_(4).The improved performance of CCN2,in particular,is attributed to a shift in the cobalt d band center towards the Fermi level,facilitating electron delocalization and transfer,enhancing Co‒O bonding,and accelerating PAA ***2’s superior activity,with a cefapirin(CFP)degradation kinetic rate constant(k1=0.760 min^(−1))~11 times that of PAA direct oxidation(k1=0.070 min^(−1))and~5 times that of commercial Co_(3)O_(4)/PAA system(k1=0.164 min^(−1)),is due to its ability to generate dominant reactive species for antibiotic degradation,including alkoxy radicals(CH3C(=O)OO•),high valence metal(Co^(Ⅳ)(=O)^(2+)),and singlet oxygen(^(1)O_(2)),with the latter two being crucial for the degradation *** degradation of CFP involved three mechanisms,including direct oxidation by PAA,decarboxylation,and open-ring reactions at nitrogen *** research provides insights into developing high-activity catalysts for efficient PAA activation and antibiotic removal,leveraging the strategy of shifting the transition metal d band center.

关键词： peracetic acid Co_(3)O_(4)nanocluster high valence metal singlet oxygen cefapirin

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Emission Characteristics, Environmental Impact, and Health Risk Assessment of Volatile Organic Compounds (vocs) During Manicure Processes

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SSRN 2023年

作者： Hao, Run Sun, Jianling Liu, Rui Zhao, Huan Yao, Zhen Wang, Hailin Hao, Zhengping Beijing Key Laboratory for VOCs Pollution Prevention and Treatment Technology Application of Urban Air Beijing Municipal Research Institute of Environment Protection Beijing100037 China The Faculty of Environment and Life Beijing University of Technology Beijing100124 China National Engineering Laboratory for VOCs Pollution Control Material & Technology Research Center for Environmental Material and Pollution Control Technology University of Chinese Academy of Sciences Beijing101408 China

In recent years, the nail industry has been widely popular in China, and the use of nail care products has also significantly increased. Due to its high content of volatile solvents, the released vocs not only have a negative impact on indoor air quality but also pose a health threat to nail salon workers who are highly exposed to such environments. The objectives of this research were to characterize vocs emissions from detailed manicure processes and to evaluate the impact on the environment and health risks. Results showed that the vocs concentration in the anti-warping treatment process was much higher than that in other manicure steps, at 360.69mg/m3, making its contributions of OFP and SOA equally prominent;The trend of concentration contribution was similar to that of OFP, and Ovocs were the most significant contributor to the vocs components in the whole manicure process. Since organic solvent nail gels were also frequently used in most steps, the main vocs were methanol, ethanol and ethyl acetate;Aromatics were the component that contributed the most to SOA, and its contributions in all processes were more than 85%;Health risk assessments performed in our study indicated that acrolein was the main non-carcinogen, and the carcinogenic risk of this study could be ignored. The results of this study can be used as a basis for controlling vocs emission and reducing exposure to vocs in nail salons. © 2023, The Authors. All rights reserved.

关键词： Health risks

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Efficient Selective Leaching of Scandium from Red Mud Through Ammonium Persulfate–Activated Roasting1

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SSRN 2024年

作者： Xue, Juanqin Song, Haodi Gou, Chunli Wang, Hang Cao, Zhaoyuan Bi, Qiang School of Chemistry and Chemical Engineering Xi’an University of Architecture and Technology Xi’an710055 China University of Chinese Academy of Sciences Research Center for Environmental Material and Pollution Control Technology National Engineering Laboratory for VOCs Pollution Control Materials & Technology Beijing101408 China

Scandium (Sc) is crucial for many high-tech industries because of its excellent alloying, electrochemical, and optical properties. Red mud (RM), produced during the Bayer process of alumina production, is rich in rare-earth elements and is a vital Sc source. However, selectively extracting Sc from RM presents significant challenges. Herein, we employed ammonium persulfate–activated roasting followed by water leaching, releasing Sc bound to hematite through crystalline-phase transformation of RM minerals. Sc was efficiently and selectively leached, and the involved impurity elements—iron (Fe), aluminum (Al), silicon (Si), and titanium (Ti)—were enriched in the leaching residue. Results showed that under optimal conditions, the Al leaching rate was 4.83%;Fe, Si and Ti were minimally leached ( © 2024, The Authors. All rights reserved.

关键词： Ammonium persulfate

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New Insight into the Inevitable Oxidation-Dissolution Behavior of Mos2 at Humid Environments: Unexpected Persistent Generation of Hydroxyl Radicals

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SSRN 2023年

作者： Lei, Dashi Wu, Zhongyi Zhang, Yu Peng, Xiangyu Zhang, Jing Xue, Juanqin Wang, Yubin School of Resources Engineering Xi’an University of Architecture and Technology Xi’an710055 China National Engineering Laboratory for VOCs Pollution Control Materials & Technology Research Center for Environmental Material and Pollution Control Technology University of Chinese Academy of Sciences Beijing101408 China Department of Chemical Engineering

The long-term persistence of transition metal dichalcogenide (TMD) gets severely weakened at humid environments, while previous studies about TMD oxidation mainly focused under light irradiation, while lack of exploration at dark environments. Herein, we filled the gap in research of the oxidation and dissolution behaviors of TMD, represented by molybdenum disulfide (MoS2). under dark condition. By means of electron paramagnetic resonance (EPR), we firstly found that water and oxygen react on MoS2 interface and generate hydroxyl radicals (•OH), a critical intermedia for MoS2 oxidation and dissolution. H2O, an important specie for MoS2 oxidation, could not only promotes the dissolution of MoO3 oxide passivation layer, but also accelerates the production of •OH. Ab-initio molecular dynamics (AIMD) simulations present detailed formation process of •OH over MoS2 surface, and spin-polarized density functional theory (DFT) calculations confirm its generation. While, under basic conditions, AIMD and DFT calculations demonstrated the generation of H2O2 at MoS2 hydroxylated surface. Therefore, our findings suggest that the environmental risk of MoS2 or other TMDs should be reconsidered, especially in humid environments. This work will assist in the understanding of MoS2 oxidation and dissolution behavior, and provide references for the investigation of interface catalytic reaction of TMDs. © 2023, The Authors. All rights reserved.

关键词： Density functional theory

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New Insight into the Inevitable Oxidation-Dissolution Behavior of MoS2 at Humid Environments: Unexpected Persistent Generation of Hydroxyl Radicals

SSRN

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SSRN 2023年

The long-term persistence of transition metal dichalcogenide (TMD) gets severely weakened at humid environments, which is key issue to solve in application. However, previous studies about TMD oxidation mainly focused under light irradiation, while lack of exploration at dark environments. Herein, we filled the gap in research of the oxidation and dissolution behaviors of TMD, represented by molybdenum disulfide (MoS2). under dark condition. The results demonstrate that water and oxygen could react produce hydroxyl radicals (•OH) on MoS2 interface, a critical intermedia for MoS2 oxidation and dissolution. Ab-initio molecular dynamics (AIMD) simulations present detailed formation process of •OH over MoS2 surface, and spin-polarized density functional theory (DFT) calculations confirm its generation. While, under basic conditions, AIMD and DFT calculations demonstrated the generation of H2O2 at MoS2 hydroxylated surface. This work will assist in understanding of MoS2 oxidation and dissolution behavior, and provide references for the investigation of long-term stability of TMDs. © 2023, The Authors. All rights reserved.

关键词： Oxidation

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A self-healing coating based on facile pH-responsive nanocontainers for corrosion protection of magnesium alloy

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Journal of Magnesium and Alloys 2022年第3期10卷 904-919页

作者： Yuejun Ouyang Lin-Xin Li Zhi-Hui Xie Lili Tang Fuhui Wang Chuan-Jian Zhong Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol(PVA)Fiber Material Huaihua UniversityHuaihua 418000PR China Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/Institute of Synthesis and Application of Functional Materials College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchong 637002PR China Shenyang National Laboratory for Materials Science Northeastern University3-11 Wenhua RoadShenyang 110819PR China Department of Chemistry State University of New York at BinghamtonBinghamtonNY 13902USA

The preparation of pH-responsive nanocontainers by typical silane modification of the mesoporous silica nanoparticle(MSN)surface is usually high-cost,complex,and time-consuming,which remains a great challenge for effective corrosion protection of magnesium ***,a new strategy to construct pH-responsive nanocontainers(MSN-MBT@LDH)is *** nanocontainers consist of corrosion inhibitor(2-mercaptobenzothiazole,MBT)loaded MSN core and layered double hydroxide(LDH)nanosheet shell serving as *** successful loading of MBT and encapsulation by LDH nanosheets were confirmed by a series of characterization such as scanning transmission electron microscopy coupled with energy dispersive X-ray spectroscopy(STEM-EDS)and N2 adsorption/desorption *** pH-responsive feature of the nanocontainers was demonstrated by determination of the MBT concentration in buffer solutions with different pH values.A smart corrosion protection system on Mg alloy is obtained by incorporating the synthesized nanocontainers into a self-assembled nanophase particle(SNAP)*** electrochemical tests and visual observations show that the hybrid coating has the best barrier properties and robustness in corrosion protection in NaCl corrosive solutions in comparison with the control *** present method simplifies the synthesis processes of nanocontainers and eliminates the potential detrimental effect of excess gatekeepers on the *** findings provide new insights into the preparation of scalable *** self-healing coatings are expected to have widespread applications for corrosion protection of Mg alloy and other metals.

关键词： Mg alloy Coating Corrosion Layered double hydroxide Nanocontainer.

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Investigation of the Synthesis and Thermal Insulation Properties of K 2 Ti 6 O 13 Whisker-Reinforced SiO 2 Micro Powder Composite Coating Fabrics

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Energy 2025年

作者： Yi Man Chang Ge Yao Wang Yongqing He Wei Yang Yumin Qi Bohong Wang Petar Sabev Varbanov Jin Wang Nanjing Vocational University of Industry Technology Nanjing 210023 Jiangsu China School of Materials Science and Engineering Hebei University of Technology Tianjin 300401 China Hebei Key Laboratory of New Functional Materials School of Material Science and Engineering Hebei University of Technology Tianjin 300401 China School of Energy and Environmental Engineering Hebei University of Technology Tianjin 300401 China Chongqing Key Laboratory of Micro-Nano System and Intelligent Transduction National Research Base of Intelligent Manufacturing Service Chongqing Technology and Business University Chongqing 400067 China National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology/Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control Zhejiang Ocean University No.1 Haida South Road 316022 Zhoushan China Széchenyi István University Egyetem tér 1 9026 Győr Hungary

Developing functional textiles with thermal insulation and hydrophobic properties is of significant interest. This study successfully synthesizes K 2 Ti 6 O 13 (potassium titanate, KTO) whiskers via the hydrothermal method and prepares KTO composite silica polyester fabric (KSP) through impregnation technology, exhibiting excellent thermal insulation and hydrophobic qualities. X-ray diffraction (XRD) analysis verifies the high purity and excellent crystallinity of KTO whiskers and SiO 2 micro-powder. Scanning electron microscopy (SEM) images reveal that the KTO whiskers retain their original morphology and exhibit uniform size distribution, with an average length of around 1 μm and an aspect ratio of 40. Transmission electron microscopy (TEM) images further validate the planar growth properties of the whiskers. Raman spectroscopy research elucidates the vibrational modes of various chemical bonds in the KTO whiskers. The ultraviolet-visible-near-infrared spectrophotometer test results demonstrate that the KSP fabric reflects 43.5% more light than standard polyester fabric and substantially lowers the temperature in the covered chamber under simulated sunlight exposure, achieving a maximum reduction of 7.4 °C. The KSP fabric has exceptional hydrophobic properties, completing a contact angle of 153.2° and maintaining reflectance stability, with a mere 5.92% reduction after 20 days of outside exposure. This work offers substantial reference value for the advancement of practical textiles.

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Plasma-Catalyzed One-Step Highly Selective Methane to Methanol Conversion Over Surface-Oxygen-Riched Ni/S-1

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SSRN 2023年

作者： Wang, Zikun Ji, Yufei Liu, Meiyin Chen, Gui Chen, Xiaomai Zhang, Yanshi Chen, Longwen Wu, Kang Ye, Daiqi Wu, Junliang School of Environment and Energy South China University of Technology Guangzhou510006 China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou510006 China

Plasma-catalyzed one-step conversion of methane to value-added liquid products has great potential for energy transformation and carbon-emission reduction. In present work, Ni/S-1 synergized with plasma exhibits the highest methane conversion and methanol selectivity with great improved energy efficiency, which is of application value. The excellent low-temperature redox activity, high specific surface area and high chemisorbed oxygen content of Ni/S-1 jointly contribute to the remarkable plasma catalytic performance. Mechanistic studies show that the plasma-excited oxygen was easily absorbed on the catalyst surface, and form Ni/S-1 with high content of surface oxygen, which drives the continuous methane partial oxidation reaction with high selectivity. It is anticipated that this work will stimulate the practical development of the methane-containing substances one-step conversion to liquid oxygenates with air as oxidant under ambient conditions. © 2023, The Authors. All rights reserved.

关键词： Methane

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Plasma-Catalyzed One-Step Highly Selective Methane to Methanol Conversion Over Ni/S-1

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SSRN 2023年

Plasma-catalyzed one-step conversion of methane to value-added liquid products has great potential for energy transformation and carbon-emission reduction. In present work, Ni/S-1 synergized with plasma exhibits the highest methane conversion and methanol selectivity with great improved energy efficiency, which is of application value. The excellent low-temperature redox activity, high specific surface area and high content of reproduceable chemisorbed oxygen of Ni/S-1 jointly contribute to the remarkable plasma catalytic performance. Mechanistic studies show that the plasma-excited oxygen was easily absorbed on the catalyst surface, and form Ni/S-1 with high content of surface oxygen, which drives the continuous methane partial oxidation reaction with high selectivity. It is anticipated that this work will stimulate the practical development of the methane-containing substances one-step conversion to liquid oxygenates with oxygen as oxidant under ambient conditions. © 2023, The Authors. All rights reserved.

关键词： Methane

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Dual-Atom Cu2/N-Doped Carbon Catalyst for Electroreduction of Co2 to C2h4

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SSRN 2022年

作者： Sun, Guodong Cao, Yanan Hu, Mingzhen Liang, Xinhu Wang, Zhe Cai, Zengjian Shen, Fengyi Zhou, Kebin School of Chemical Sciences University of Chinese Academy of Sciences Beijing100049 China National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences Beijing100049 China

CO 2 can be reduced to C 1 products over single-atom electrocatalysts but hardly achieve C-C coupling, which is a crucial step to producing multi-carbon products. In this work, we developed a dual-atom catalyst (Cu 2 /NC) with a Cu-Cu bond distributed over a nitrogen-doped carbon support, possessing a unique catalytic site for CO 2 electroreduction. The Cu2/NC catalyst can efficiently reduce CO 2 to C 2 H 4 with a Faradaic efficiency of ~34.9% and a current density of more than 35 mA·cm -2 . In contrast, Cu single-atom catalysts exhibit significantly different selectivity of CO 2 reduction reactions (CO 2 RR), mainly generating C 1 products. According to theoretical calculations, the existence of the Cu-Cu bond enhances the adsorption of *CO and reduces the energy barrier of C-C coupling. Our work is expected to open up new opportunities to develop highly efficient electrocatalysts for making multi-carbon products. © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

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