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Tuning interfacial charge transfer for efficient visible-light-driven photodegradation and simultaneous H_(2)evolution

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Journal of Materials Science & technology 2024年第1期168卷 35-49页

作者： Zhiyang Li Yaogang Chen Yinghe Zhang Wei Ai Qian Lei Tingjun Yao Dan Zhong Wenjie Liu Wenbiao Jin Lei Yang State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and ControlSchool of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen 518055China Key Laboratory of Northwest Water Resources Environment and EcologyMinistry of EducationSchool of Environmental and Municipal EngineeringXi’an University of Architecture and TechnologyXi’an 710055China CNAS Accredited Test Center Guangdong Engineering Technology Research Center of Air PurificationHealthlead Co.Ltd.Shenzhen 518055China School of Science Harbin Institute of Technology ShenzhenShenzhen 518055China

The edge-graphitized carbon nitride(C_(3)N_(4)-C g)was prepared by secondary pyrolysis to construct ZnO/C_(3)N_(4)-C g(ZCN)type-Ⅱheterojunction photocatalyst via a facile sonication dispersion method,which achieved∼7.04-fold and∼18.3-fold enhanced visible-light-driven photocatalytic performance for refrac-tory micropollutant removal and simultaneous hydrogen(H_(2))evolution respectively compared to con-ventional ZnO/g-C_(3)N_(4)Step-scheme *** apparent quantum efficiency of the ZCN_(0.4)het-erojunction reaches 0.92%(λ=420 nm).Such excellent performance stems from that the edge-graphene moieties stitched onto the interface of heterojunction extend light absorption to the full visible spec-trum,meanwhile,the built-in electric field generated during Fermi level alignment accompanying fa-vorable band-bending structure provides an effective pathway for the rapid migration of photoinduced electrons via the edge graphene channel to improve interfacial charge separation ***,the midgap states introduced in ZCN heterojunction could temporarily retain photoexcited electrons to effectively inhibit the in situ carrier recombination for improved photocatalytic H_(2)***,ZCN/peroxymonosulfate system exhibited excellent anti-interference performance against complex water bodies under visible illumination due to the synergistic effect between the co-existing anions and organic ***,the eco-friendly nature of the ZCN/peroxymonosulfate system showed no biotoxicity of reaction filtrate on cell proliferation after treatment,which avoided secondary ***-ering the outstanding performance in photocatalysis,the ZCN system exhibits broad potential for practical applications in water pollution control and green energy production.

关键词： ZnO C_(3)N_(4)-C g Heterojunction Photodegradation Hydrogen evolution

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Two-dimensional dumbbell silicene as a promising anode material for(Li/Na/K)-ion batteries

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Chinese Physics B 2023年第9期32卷 28-34页

作者：刘曼程子爽张小明李叶枫靳蕾刘丛代学芳刘影王啸天刘国栋 State Key Laboratory of Reliability and Intelligence of Electrical Equipment and School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China School of Physical Science and Technology Southwest UniversityChongqing 400715China

Rechargeable ion batteries require anode materials with excellent performance,presenting a key challenge for *** paper explores the potential of using two-dimensional dumbbell silicene as an anode material for alkali metal ion batteries through density functional theory(DFT)*** findings demonstrate that alkali metal ions have negative adsorption energies on dumbbell silicene,and the energy barriers for Li/Na/K ion diffusion are as low as0.032 e V/0.055 e V/0.21 e V,indicating that metal ions can easily diffuse across the entire surface of dumbbell ***,the average open circuit voltages of dumbbell silicene as anode for Li-ion,Na-ion,and K-ion batteries are 0.42 V,0.41 V,and 0.60 V,respectively,with corresponding storage capacities of 716 m Ah/g,622 m Ah/g,and 716 m Ah/*** results suggest that dumbbell silicene is an ideal anode material for Li-ion,Na-ion,and K-ion batteries,with high capacity,low open circuit voltage,and high ion diffusion ***,our calculations show that the theoretical capacities obtained using DFT-D2 are higher than those obtained using DFT-D3,providing a valuable reference for subsequent theoretical calculations.

关键词： dumbbell silicene density functional theory anode materials ion batteries

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Recycling of waste aluminum scraps to fabricate sulfidated zero-valent iron-aluminum particles for enhanced chromate removal

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Journal of environmental Sciences 2024年第4期138卷 650-659页

作者： Yahui Zhang Liguo Zhang Jiajia Zeng Shuqun Xu Jianyu Pan Wenzhuo Huang Jianliang Sun Feng Jiang Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Theoretical Chemistry of Environment School of EnvironmentSouth China Normal UniversityGuangzhou 510006China Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology School of Environmental Science&EngineeringSun Yat-Sen UniversityGuangzhou 510275China

Massive waste aluminum scraps produced from the spent aluminum products have high electron capacity and can be recycled as an attractive alternative to materials based on zerovalent iron(Fe^(0))for the removal of oxidative contaminants from *** study thus proposed an approach to fabricate micron-sized sulfidated zero-valent iron-aluminum particles(S-Al^(0)@Fe^(0))with high reactivity,electron selectivity and capacity using recycled waste aluminum scraps.S-Al^(0)@Fe^(0)with a three-layer structure contained zero-valent aluminum(Al^(0))core,Fe^(0) middle layer and iron sulfide(FeS)*** rates of chromate(Cr(Ⅵ))removal by S-Al^(0)@Fe^(0)at pH 5.0-9.0 were 1.6-5.9 times greater than that by sulfidated zero-valent iron(S-Fe^(0)).The Cr(Ⅵ)removal capacity of S-Al^(0)@Fe^(0)was 8.2-,11.3-and 46.9-fold greater than those of S-Fe0,zero-valent iron-aluminum(Al^(0)-Fe^(0))and Fe^(0),*** chemical cost of S-Al^(0)@Fe^(0) for the equivalent Cr(Ⅵ)removal was 78.5%lower than that of S-Fe^(0).Negligible release of soluble aluminum during the Cr(Ⅵ)removal was *** significant enhancement in the reactivity and capacity of S-Al^(0)@Fe^(0)was partially ascribed to the higher reactivity and electron density of the Al0core than Fe^(0).More importantly,S-Al^(0)@Fe^(0) served as an electric cell to harness the persistent and selective electron transfer from the Al^(0)-Fe^(0) core to Cr(Ⅵ)at the surface via coupling Fe^(0)-Fe^(2+)-Fe^(3+)redox cycles,resulting in a higher electron utilization ***,S-Al^(0)@Fe^(0) fabricated using recycled waste aluminum scraps can be a cost-effective and environmentally-friendly alternative to S-Fe^(0) for the enhanced removal of oxidative contaminants in industrial wastewater.

关键词： Recycled waste aluminum scraps Oxidative contaminants Cr(Ⅵ)reduction Sulfidated Al^(0)@Fe^(0)particle Electron transfer

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Achieving high ductility and low in-plane anisotropy in magnesium alloy through a novel texture design strategy

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Journal of Magnesium and Alloys 2024年第7期12卷 2863-2873页

作者： Shi Liu Cheng Wang Hong Ning Zhao-Yuan Meng Kai Guan Hui-Yuan Wang State Key Laboratory of Automotive Simulation and Control Jilin UniversityPR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Nanling CampusJilin UniversityNo.5988 Renmin StreetChangchun130025 PR China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and EngineeringHebei University of TechnologyTianjin300130 PR China

Texture regulation is a prominent method to modify the mechanical properties and anisotropy of magnesium *** this work,the Mg-1Al-0.3Ca-0.5Mn-0.2Gd(wt.%)alloy sheet with TD-tilted and circular texture was fabricated by unidirectional rolling(UR)and multidirectional rolling(MR)method,*** generating a strong in-plane mechanical anisotropy in conventional TD-tilted texture,the novel circular texture sample possessed a weak in-plane yield *** can be rationalized by the similar proportion of soft grains with favorable orientation for basalslip and{10.12}tensile twinning during the uniaxial tension of circular-texture sample along different ***,compared with the TD-tilted texture,the circular texture improved the elongation to failure both along the rolling direction(RD)and transverse direction(TD).By quasi-in-situ EBSD-assisted slip trace analysis,higher activation of basal slip was observed in the circular-texture sample during RD tension,contributing to its excellent *** loading along the TD,the TD-tilted texture promoted the activation of{10.12}tensile twins significantly,thus providing nucleation sites for cracks and deteriorating the *** research may shed new insights into the development of formable and ductile Mg alloy sheets by texture modification.

关键词： Magnesium alloy TD-tilted texture Circular texture In-plane yield anisotropy Ductility

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Microbial-driven ectopic uranium extraction with net electrical energy production

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Frontiers of environmental Science & engineering 2024年第1期18卷 49-58页

作者： Xin Tang Yin Ye Chunlin Wang Bingqian Wang Zemin Qin Cui Li Yanlong Chen Yuheng Wang Zhiling Li Miao Lv Aijie Wang Fan Chen School of Ecology and Environment Northwestern Polytechnical UniversityXi’an 710129China School of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China

The extraction of uranium (U) from U-bearing wastewater is of paramount importance for mitigating negative environmental impacts and recovering U resources. Microbial reduction of soluble hexavalent uranium (U(VI)) to insoluble tetravalent uranium (U(IV)) holds immense potential for this purpose, but its practical application has been impeded by the challenges associated with managing U-bacterial mixtures and the biotoxicity of U. To address these challenges, we present a novel spontaneous microbial electrochemical (SMEC) method that spatially decoupled the microbial oxidation reaction and the U(VI) reduction reaction. Our results demonstrated stable and efficient U extraction with net electrical energy production, which was achieved with both synthetic and real wastewater. U(VI) removal occurred via diffusion-controlled U(VI)-to-U(IV) reduction-precipitation at the cathode, and the UIVO_(2) deposited on the surface of the cathode contributed to the stability and durability of the abiotic U(VI) reduction. Metagenomic sequencing revealed the formation of efficient electroactive communities on the anodic biofilm and enrichment of the key functional genes and metabolic pathways involved in electron transfer, energy metabolism, the TCA cycle, and acetate metabolism, which indicated the ectopic reduction of U(VI) at the cathode. Our study represents a significant advancement in the cost-effective recovery of U from U(VI)-bearing wastewater and may open a new avenue for sustainable uranium extraction.

关键词： U(VI)bioreduction Electricity production Reaction decoupling Uranium-bearing wastewater Biofilm microbiome

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Unlocking high-performance near-infrared photodetection:polaron-assisted organic integer charge transfer hybrids

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Light(Science & Applications) 2024年第12期13卷 3285-3296页

作者： Muhammad Ahsan Iqbal Xueqian Fang Yasir Abbas Xiaoliang Weng Tingchao He Yu-Jia Zeng School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China Guangdong Provincial Key Laboratory of Intelligent Disaster Prevention and Emergency Technologies for Urban Lifeline Engineering Dongguan University of TechnologyDongguan 523808China Department of Mechanics Tianjin UniversityTianjin 300350China Shenzhen Key Laboratory of Laser Engineering Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Room temperature femtowatt sensitivity remains a sought-after attribute,even among commercial inorganic infrared(IR)photodetectors(PDs).While organic IR PDs are poised to emerge as a pivotal sensor technology in the forthcoming Fourth-Generation Industrial Era,their performance lags behind that of their inorganic *** discrepancy primarily stems from poor external quantum efficiencies(EQE),driven by inadequate exciton dissociation(high exciton binding energy)within organic IR materials,exacerbated by pronounced non-radiative recombination at narrow ***,we unveil a high-performance organic Near-IR(NIR)PD via integer charge transfer between Poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene](C-14PBTTT)donor(D)and Tetrafluorotetracyanoquinodimethane(TCNQF4)acceptor(A)molecules,showcasing strong low-energy subgap absorptions up to 2.5μ*** observe that specifically,polaron excitation in these radical and neutral D-A blended molecules enables bound charges to exceed the Coulombic attraction to their counterions,leading to an elevated EQE(polaron absorption region)compared to Frenkel *** a result,our devices achieve a high EQE of∼10^(7)%,femtowatt sensitivity(NEP)of~0.12 fW Hz^(-1/2)along a response time of~81ms,at room temperature for a wavelength of 1.0μ*** innovative utilization of polarons highlights their potential as alternatives to Frenkel excitons in high-performance organic IR PDs.

关键词： integer polaron charge

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Green-synthesized, biochar-supported nZVI from mango kernel residue for aqueous hexavalent chromium removal: Performance, mechanism and regeneration

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Chinese Journal of Chemical engineering 2024年第7期71卷 91-101页

作者： Yuting Zhang Yuwei Tang Ruiping Yan Shuang Liang Zhongmou Liu Yadong Yang Key Laboratory of Songliao Aquatic Environment Ministry of EducationJilin Jianzhu UniversityChangchun 130118China School of Environmental Science and Engineering Yancheng Institute of TechnologyYancheng 224051China

A biochar-supported green nZVI(G-nZVI@MKB)composite was synthesized using mango kernel waste with“dual identity”as reductant and biomass of *** G-nZVI@MKB with a Fe/C mass ratio of 2.0(G-nZVI@MKB2)was determined as the most favorable composite for hexavalent chromium(Cr(VI))*** influencing parameters were discussed,and 99.0%of Cr(VI)removal occurred within 360 min under these optimized ***-second order kinetic model and intra-particle diffusion model well depicted Cr(VI)removal *** XRD,FTIR,SEM,and XPS analyses verified the key roles of G-nZVI and functional groups,as well as the primary removal mechanisms involving electrostatic attraction,reduction,and complexation.G-nZVI@MKB2 exhibited good stability and reusability with only a 16.4%decline in Cr(VI)removal after five *** study offered evidence that mango kernel could be recycled as a beneficial resource to synthesize green nZVI-loaded biochar composite for efficient Cr(VI)elimination from water.

关键词： Synthesis Biochar-supported nZVI Hexavalent chromium Reduction Regeneration

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Cobalt single-atom catalyst tailored ceramic membrane for selective removal of emerging organic contaminants

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environmental Science and Ecotechnology 2024年第5期21卷 219-229页

作者： Jiaxuan Yang Jing Zhao Hesong Wang Yatao Liu Junwen Ding Tianyi Wang Jinlong Wang Han Zhang Langming Bai Heng Liang State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090PR China Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing100083PR China

Water reuse is an effective way to solve the issues of current wastewater increments and water resource ***,a promising method for water reuse,has the characteristics of low energy consumption,easy operation,and high adaptability to coupling with other water treatment ***,emerging organic contaminants(EOCs)in municipal wastewater cannot be effectively intercepted by ultrafiltration,which poses significant challenges to the effluent quality and sustainability of ultrafiltration ***,we develop a cobalt single-atom catalyst-tailored ceramic membrane(Co1-NCNT-CM)in conjunction with an activated peroxymonosulfate(PMS)system,achieving excellent EOCs degradation and anti-fouling *** interfacial reaction mechanism effectively mitigates membrane fouling through a repulsive interaction with natural organic *** generation of singlet oxygen at the Co-N3-C active sites through a catalytic pathway(PMS/PMS*/OH*/O*/OO*/1 O_(2))exhibits selective oxidation of phenols and sulfonamides,achieving>90%removal *** findings elucidate a multi-layered functional architecture within the Co1-NCNT-CM/PMS system,responsible for its superior performance in organic decontamination and membrane maintenance during secondary effluent *** highlights the power of integrating Co1-NCNT-CM/PMS systems in advanced wastewater treatment frameworks,specifically for targeted EOCs removal,heralding a new direction for sustainable water management.

关键词： Single-atom catalytic ceramic membrane Peroxymonosulfate activation Selective oxidation Interfacial response Multi-layer functional zones

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Boosting electrochemical reduction of CO_(2)to CO using molecule-regulated Ag nanoparticle in ionic liquids

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Green Energy & environment 2025年第4期10卷 813-820页

作者： Fangfang Li Kuilin Peng Chongyang Jiang Shaojuan Zeng Xiangping Zhang Xiaoyan Ji Energy Engineering Division of Energy ScienceLuleåUniversity of TechnologyLuleå97187Sweden Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China College of Chemical Engineering and Environment China University of PetroleumBeijing102249China

Electrochemical reduction of CO_(2)is a promising approach to convert CO_(2)to high-valued chemicals and ***,developing efficient electrocatalysts featuring desirable activity and selectivity is still a big *** this work,a strategy of introducing functionalized molecules with desirable CO_(2)affinity to regulate Ag catalyst for promoting electrochemical reduction of CO_(2)was ***,3-mercapto-1,2,4-triazole was introduced onto the Ag nanoparticle(Ag-m-Triz)for the first time to achieve selectively converting CO_(2)to carbon monoxide(CO).This Ag-m-Triz exhibits excellent performance for CO_(2)reduction with a high CO Faradaic efficiency(FECO)of 99.2%and CO partial current density of 85.0 mA cm^(-2)at-2.3 V ***/Ag^(+) in H-cell when combined with the ionic liquid-based electrolyte,30 wt%1-butyl-3-methylimidazolium hexafluorophosphate([Bmim][PF6])-65 wt%acetonitrile(AcN)-5 wt%H2O,which is 2.5-fold higher than the current density in Ag-powder under the same *** studies confirm that the significantly improved performance of Ag-m-Triz originates from(i)the stronger adsorption ability of CO_(2)molecule and(ii)the weaker binding energy to form the COOH*intermediate on the surface of Ag-m-Triz compared with the Ag-powder catalyst,which boosts the conversion of CO_(2)to *** research provides a facile way to regulate electrocatalysts for efficient CO_(2)reduction by introducing functionalized molecules.

关键词： CO_(2)reduction CO Electrochemical Molecule-regulated Silver Ionic liquid

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Efficient NO_x abatement by passive adsorption over a Pd-SAPO-34 catalyst prepared by solid-state ion exchange

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Chinese Chemical Letters 2024年第4期35卷 210-213页

作者： Linhui Liu Wuwan Xiong Mingli Fu Junliang Wu Zhenguo Li Daiqi Ye Peirong Chen National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China National Engineering Laboratory for Mobile Source Emission Control Technology China Automotive Technology&Research Center Co.Ltd.Tianjin 300300China

Palladium-exchanged chabazite(Pd-CHA) zeolites as passive NO_x adsorbers(PNAs) enable efficient purification of nitrogen oxides(NO_x) in cold-start diesel exhausts. Their commercial application, however,is limited by the lack of facile preparation method. Here, high-performance CHA-type Pd-SAPO-34 zeolite was synthesized by a modified solid-state ion exchange(SSIE) method using PdO as Pd precursor,and demonstrated superior PNA performance as compared to Pd-SAPO-34 prepared by conventional wetchemistry strategies. Structural characterization using Raman spectroscopy and X-ray diffraction revealed that the SSIE method avoided water-induced damage to the zeolite framework during Pd loading. Mechanistic investigations on the SSIE process by in situ infrared spectroscopy and X-ray photoelectron spectroscopy disclosed that, while PdO precursor was mainly converted to Pd^(2+) cations coordinated to the zeolite framework by consuming the-OH groups of the zeolite, a portion of PdO could also undergo thermal decomposition to form highly dispersed Pd~0 clusters in the pore channels. This simplified and scalable SSIE method paves a new way for the cost-effective synthesis of defect-free high-performance Pd-SAPO-34 zeolites as PNA catalysts.

关键词： Pd-SAPO-34 Passive NO_x adsorber Pd loading Solid-state ion exchange Pd transformation

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