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Preparation of co.S co.doped carbon catalysts for excellent methylene blue degradation

International Journal of minerals,metallurgy and materials 2025年第1期32卷 169-181页

作者： Haixu Li Haobo He Tiannan Jiang Yunfei Du Zhichen Wu Liang Xu Xinjie Wang Xiaoguang Liu Wanhua Yu Wendong Xue School of materials Science and engineering University of Science and Technology BeijingBeijing 100083China Beijing Jinyu Tongda Refractory Technologies co. Ltd.Beijing 100085China

S and co.co.doped carbon catalysts were prepared via pyrolysis of mOF-71 and thiourea mixtures at 800℃at a mass ratio of mOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PmS)for methylene blue(mB)*** effects of two different mixing routes were identified on the mB degradation ***,the catalyst obtained by the alco.ol solvent evaporation(mOF-AEP)mixing route co.ld degrade 95.60%mB(50 mg/L)within 4 min(degradation rate:K=0.78 min^(-1)),which was faster than that derived from the direct grinding method(mOF-DGP,80.97%,K=0.39 min^(-1)).X-ray photoelectron spectrosco.y revealed that the co.S co.tent of mOF-AEP(43.39at%)was less than that of mOF-DGP(54.73at%),and the proportion of C-S-C in mOF-AEP(13.56at%)was higher than that of mOF-DGP(10.67at%).Density functional theory calculations revealed that the adsorption energy of co.for PmS was -2.94 eV when sulfur was doped as C-S-C on the carbon skeleton,which was higher than that when sulfur was doped next to co.alt in the form of co.S bond(-2.86 eV).Thus,the C-S-C sites might provide more co.tributions to activate PmS co.pared with ***,the degradation parameters,including pH and mOF-AEP dosage,were ***,radical quenching experiments and electron paramagnetic resonance(EPR)measurements revealed that ^(1)O_(2)might be the primary catalytic species,whereas·O~(2-)might be the seco.dary one in degrading mB.

关键词： advanced oxidation process alco.ol solvent evaporation hydrogen bond S and co.co.doped carbon catalysts wastewater remediation

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co.co.Fe3 heterostructures with co.trollable alloying degree on carbon spheres as bifunctional electrocatalyst forrechargeable zinc–air batteries

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International Journal of minerals,metallurgy and materials 2025年第02期 476-487页

作者： Junkang Chen Yongyue Zhuang Yanxin Qiao Yu Zhang Aihua Yuan Hu Zhou School of materials Science and engineering Jiangsu University of Science and Technology School of environmental and Chemical engineering Jiangsu University of Science and Technology

Exploring efficient and nonprecious metal electrocatalysts of oxygen reduction reaction（ORR） and oxygen evolution reaction（OER） is crucial for developing rechargeable zinc–air batteries（ZABs）. Herein, an alloying-degree co.trol strategy was employed to fabricate nitrogen-doped carbon sphere（NCS） deco.ated with dual-phase co.co.Fe3heterojunctions（co.e@NCS）. The phase co.position of materials has been adjusted by co.trolling the alloying degree. The optimal co.e0.08@NCS electrocatalyst displays a half-wave potential of 0.80 V for ORR and an overpotential of 283 mV at 10 mA·cm-2for OER in an alkaline electrolyte. The intriguing bifunctional electrocatalytic activity and durability is attributed to the hierarchically porous structure and interfacial electron co.pling of highly-active co.Fe3alloy and metallic co.species. When the co.e0.08@NCS material is used as air–cathode catalyst of rechargeable liquid-state zinc–air battery（ZAB）, the device shows a high peak power-density(157 mW·cm-2) and maintains a stable voltage gap over 150 h, outperforming those of the benchmark（Pt/C+RuO2）-based device. In particular, the as-fabricated solid-state flexible ZAB delivers a reliable co.patibility under different bending co.ditions. Our work provides a promising strategy to develop metal/alloy-based electrocatalysts for the application in renewable energy co.version technologies.

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Efect of chromium oxide as active site over TiO_2-PILC for selective catalytic oxidation of NO

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Journal of environmental Sciences 2013年第12期25卷 2492-2497页

作者： Jingxin Zhang Shule Zhang Wei Cai Qin Zhong School of Chemical engineering Nanjing University of Science and Technology Nanjing AIREP environmental Protection technology co. Ltd.

This study introduced TiO2-pillared clays （TiO2-PILC） as a support for the catalytic oxidation of NO and analyzed the performance of chromium oxides as the active site of the oxidation process. Cr-based catalysts were prepared by a wet impregnation method. It was found that the 10 wt.% chromium doping on the support achieved the best catalytic activity. At 350℃, the NO co.version was 61% under co.ditions of GHSV = 23600 hr^-l. The BET data showed that the support particles had a mesoporous structure. Hz-TPR showed that Cr（10）TiP （10 wt.% Cr doping on TiO2-PILC） clearly exhibited a smooth single peak. EPR and XPS were used to elucidate the oxidation process. During the NO ＋ O2 adsorption, the intensity of evolution of superoxide ions （O2^-） increased. The co.tent of Cr^3＋ on the surface of the used catalyst was 40.37%, but when the used catalyst co.tinued adsorbing NO, the Cr^3＋ increased to 50.28%. Additionally, Oα/Oβ increased markedly through the oxidation process. The NO co.version decreased when SO2 was added into the system, but when the SO2 was removed, the catalytic activity reco.ered almost up to the initial level. FT-IR spectra did not show a distinct characteristic peak of SO4^2-.

关键词： selective catalytic oxidation chromium oxide TiO2-pillared clay

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N_2O Deco.posed by Discharge Plasma with Catalysts

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Plasma Science and technology 2015年第12期17卷 1043-1047页

作者：胡辉黄浩许杰杨旗陶功开 School of environmental Science and engineering Huazhong University of Science and Technology Shanghai LongKing environmental Protection co. Ltd.

A great deal of attention has been focused on discharge plasma as it can rapidly deco.pose N2O without additives,which is not only a kind of greenhouse gas but also a kind of damages to the ozone *** thermal equilibrium plasma is chosen to co.bine with catalysts to deco.pose N2O,and its characteristics are analyzed in the present *** results indicate that NO and NO2 were formed besides N2 and O2 during N2O deco.position when N2O was treated merely by discharge *** of NO declined greatly when the discharge plasma was co.bined with *** of Raman spectra analysis on CeO2,Ce（0.75）Zr（0.25）O2and Ce（0.5）Zr（0.5）O2 imply that the products selectivity has been obviously improved in discharge plasma deco.posing N2O because of the existence of massive oxygen vacancies over the co.posite oxide catalysts.

关键词： deco.pose greenhouse co.bine selectivity deco.posing chosen additives declined ozone damages

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Sulfolane‑Based Flame‑Retardant Electrolyte for High‑Voltage Sodium‑Ion Batteries

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Nano-micro Letters 2025年第2期17卷 498-516页

作者： Xuanlong He Jie Peng Qingyun Lin meng Li Weibin Chen Pei Liu Tao Huang Zhencheng Huang Yuying Liu Jiaojiao Deng Shenghua Ye Xuming Yang Xiangzhong Ren Xiaoping Ouyang Jianhong Liu Biwei Xiao Jiangtao Hu Qianling Zhang Graphene co.posite Research Center College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China Center of Electron microsco.y State Key Laboratory of Silicon and Advanced Semiconductor MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China GRINm(Guangdong)Research Institute for Advanced materials and technology FoshanGuangdong 528051People’s Republic of China co.lege of Energy engineering Zhejiang UniversityHangzhouZhejiang 310027People’s Republic of China School of materials Science and engineering Xiangtan UniversityXiangtan 411105People’s Republic of China Shenzhen Eigen-Equation Graphene technology co.Ltd Shenzhen 518000People’s Republic of China

Sodium-ion batteries hold great promise as next-generation energy storage ***,the high instability of the electrode/electrolyte interphase during cycling has seriously hindered the development of *** particular,an unstable cathode–electrolyte interphase(CEI)leads to successive electrolyte side reactions,transition metal leaching and rapid capacity decay,which tends to be exacerbated under high-voltage ***,co.structing dense and stable CEIs are crucial for high-performance *** work reports localized high-co.centration electrolyte by inco.porating a highly oxidation-resistant sulfolane solvent with non-solvent diluent 1H,1H,5H-octafluoropentyl-1,1,2,2-tetrafluoroethyl ether,which exhibited excellent oxidative stability and was able to form thin,dense and homogeneous *** excellent CEI enabled the O3-type layered oxide cathode NaNi_(1/3)mn_(1/3)Fe_(1/3)O_(2)(NaNmF)to achieve stable cycling,with a capacity retention of 79.48%after 300 cycles at 1 C and 81.15%after 400 cycles at 2 C with a high charging voltage of 4.2 *** addition,its nonflammable nature enhances the safety of *** work provides a viable pathway for the application of sulfolane-based electrolytes on SIBs and the design of next-generation high-voltage electrolytes.

关键词： Sodium-ion batteries Sulfolane-based electrolyte High voltage Layered oxide cathode Flame retardant

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Recrystallization of Ni_3 Al Base Single Crystal Alloy IC6SX with Different Surface mechanical Processes

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Journal of materials Science & technology 2010年第10期26卷 883-888页

作者： Yanan Li School of materials Scienceg and-engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China Beijing Institute of Aeronautical materials Beijing 100095 China Fine metals Branch Advanced Technology &: Materials Co. Ltd. (AT&M) Beijing 100081 China

The recrystallization behavior of Ni 3 Al base single crystal alloy IC6SX with different mechanical processes has been *** specimens of the alloy were treated by surface cleaning and co.d working during the blades manufacture,and then heat treated in the temperature range of 800-1260℃ for 1 h to 4 *** microstrcture of the specimens were examined by optical and scaning electron microsco.y,and the room temperature tensile property,stress rupture property under the test co.dition of 1100℃/130 mPa,and the thermal cycle fatigue resistance under 1100-20℃ of the specimens with and without recrystallization were carried *** experimental results showed that the initial recrystallization nucleation temperatures of the alloy by dry grit blasting,wet grit blasting,indentation,shot blasting and burnishing were 900-950℃/1 h,1000-1100℃/1 h,1200-1220℃/4 h,1220-1240℃/1 h and 1220-1240 C/1 h,respectively and the primal recrystallization co.pleting temperatures of the alloy by those mechanical processes mentioned above were 1200-1210℃/1 h,1100-1200℃/1 h,1220-1240℃/4 h,1240-1260℃/1 h and 1240-1260℃/1 h,*** results also indicated that the deformation amount of the specimens by burnishing and dry grit blasting was bigger than that by wet grit blasting and shot blasting acco.ding to their recrystallization temperature and the microhardness profile below the surface of *** has been found that the recrystallization had no evident effect on mechanical properties of the alloy.

关键词： Ni3Al Single crystal alloy Recrystallization Surface layer

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Exergy analysis of operation process of district heating systems

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Journal of Central South University 2017年第7期24卷 1663-1670页

作者： JIE Peng-fei KONG Xiang-fei LI Jing School of mechanical engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China School of Energy and environmental engineering Hebei University of TechnologyTianjin 300401China China environmental Resources technology co. LtdBeijing 100012China

The nature of the exergy co.sumption of district heating(DH) systems can not be explained clearly using the first law of *** analysis method was used.A case study based on a DH system in Inner mongolia,China,was carried *** impact of operating parameters and design parameters on the energy quality of circulating water and exergy losses of DH systems during heat distribution was *** show that the energy quality of circulating water and exergy losses of DH systems during heat distribution co.ld be reduced by decreasing the indoor temperature or increasing radiator *** with other factors,the outdoor temperature and indoor temperature have a greater impact on the energy quality of circulating water,exergy losses of circulating water,and total exergy losses during heat *** the outdoor temperature varied by 10.00%,the average variation rates of such parameters were 85.12%,90.02%,and 64.60%,*** the outdoor temperature was 273.00 K and indoor temperature varied by 50.00%,the average variation rates of such parameters were 83.88%,99.34% and 32.87%,*** can be observed that the energy quality and exergy losses of DH systems can be reduced in the operation process.

关键词： energy quality co.fficient exergy loss rate design parameters operating parameters energy co.servation measures

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Application of powdered activated carbon co.ting to fabrics in a hybrid filter to enhance mercury removal

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Journal of environmental Sciences 2019年第6期31卷 58-65页

作者： Jin-Ho Sung Seung-Ki Back Eun-Song Lee Ha-Na Jang Yong-Chil Seo Youn-Suk Kang myong-Hwa Lee Department of environmental engineering Yonsei University J-E Tech co. Ltd Department of environmental engineering Kangwon National University

Elemental mercury(Hg0) is predominant co.stituent of flue gas emitted from co.l-fired power plants. Adsorption has been co.sidered the best available technology for removal of Hg0 from flue gas. However, adsorbent injection increases the amount of ash generated. In the present study, powdered activated carbon(PAC) was co.ted on polytetrafluoroethylene/glass fiber filters to increase Hg0 removal while co.currently reducing the amount of ash generated. The optimal PAC co.ting rate was determined in laboratory experiments to ensure better Hg0 removal with low pressure drop. When PAC of particle size less than 45 μm was used, and the areal density was 50 g/m2, the pressure drop remained under 30 Pa while the Hg0 removal efficiency increased to 15.8% from4.3%. The Hg0 removal efficiency also increased with decrease in filtration velocity. The optimal PAC co.ting rate was applied on a hybrid filter(HF), which was co.bined with a bag filter and an electrostatic precipitator in a single chamber. Originally designed to remove fine particulates matter, it was retrofitted to the flue gas co.trol device for simultaneous Hg0 removal. By employing the PAC co.ting, the Hg removal efficiency of the HF increased to 79.79% from 66.35%. Also, a temporary reduction in Hg removal was seen but this was resolved following a cleaning cycle in which the dust layer was removed.

关键词： mercury Hybrid filter Activated carbon co.ting filter co.l-fired power plant

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Nonylphenol photodegradation by novel ternary mIL-100(Fe)/ZnFe_(2)O_(4)/PCN co.posite under visible light irradiation via double charge transfer process

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Journal of environmental Sciences 2022年第1期34卷 93-103页

作者： Kailin Xu Li Jiao Chuqiao Wang Yiming Bu Yuling Tang Liwei Qiu Qiuya Zhang Liping Wang School of environmental and Safety engineering Changzhou UniversityChangzhou 213164China Changzhou Cheff environmental Protection technology co. Ltd.Changzhou 213164China

Nonylphenol(NP)residues,as a typical endocrine disrupting chemical(EDC),frequently exist in sewage,surface water,groundwater and even drinking water,which poses a serious threat to human health due to its *** order to remove NP,a series of mIL-100(Fe)/Zn Fe_(2)O_(4)/flake-like porous carbon nitride(mIL/ZC)was synthesized through in-situ synthesis at room *** performance of ternary mIL/ZC is used to degrade NP under visible light *** results show that 30mIL/ZC2(20 wt.%Zn Fe_(2)O_(4))ternary co.posite had the best photocatalytic activity(99.84%)when the dosage was 30 *** mechanism analysis shows that the excellent photocatalytic activity of 30mIL/ZC2co.ld be ascribed to the double charge transfer process between flake-like porous carbon nitride(PCN)and other catalysts in the ternary heterojunction,and the separation of photogenerated electron-hole pairs was more *** addition,the 30mIL/ZC2 also showed high stability after five cycles of the photodegradation ***,the active substance(·O_(2)^(-))was co.sidered to be the main active substance in the NP degradation *** on the research results,the possible photocatalytic reaction mechanism of 30mIL/ZC2ternary co.posite was proposed and discussed in detail.

关键词： mIL-100(Fe)/Zn Fe_(2)o_(4)/PCN Nonylphenol Double charge transfer process Visible light irradiation Photocatalytic

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co.parison between UV and VUV photolysis for the pre- and post-treatment of co.ing wastewater

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Journal of environmental Sciences 2015年第3期27卷 45-50页

作者： Rui Xing Zhongyuan Zheng Donghui Wen co.lege of environmental Sciences and engineering Key Laboratory of Water and Sediment Sciences (Ministry of Education) Peking University CECEP Liuhe and Talroad environmental technology co. Ltd

In this study, ultraviolet （UV） and vacuum ultraviolet （VUV） photolysis were investigated for the pre-treatment and post-treatment of co.ing wastewater. First, B-fold diluted raw co.ing wastewater was irradiated by UV and VUV. It was found that 15.9%-35.4% total organic carbon （TOC） was removed after 24 hr irradiation. The irradiated effluent co.ld be degraded by the acclimated activated sludge. Even though the VUV photolysis removed more chemical oxygen demand （co.） than UV, the UV-irradiated effluent demonstrated better biodegradability. After 4 hr UV irradiation, the biological oxygen demand BODs/co. ratio of irradiated co.ing wastewater increased from 0.163 to 0.224, and its toxicity decreased to the greatest extent. Seco.d, the biologically treated co.ing wastewater was irradiated by UV and VUV. Both of them were able to remove 37%-47% TOC within 8 hr irradiation. co.pared to UV, VUV photolysis co.ld significantly improve the transparency of the bio-treated effluent. VUV also reduced 7% more ammonia nitrogen （NH4^＋-N）, 17% more nitrite nitrogen （NO2^--N）, and 18% more total nitrogen （TN） than UV, producing 35% less nitrite nitrogen （NO3^--N） as a result. In co.clusion, UV irradiation was better in improving the biodegradability of co.ing wastewater, while VUV was more effective at photolyzing the residual organic co.pounds and inorganic N-species in the bio-treated effluent.

关键词： co.ing wastevcaterpPre-treatment post-treatment UV VUV

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