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Ni/CeO_(2)基催化剂构筑及其CO_(2)甲烷化催化性能研究进展

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低碳化学与化工 2024年第8期49卷 74-88页

作者：胡译之彭揚张义焕张荣斌冯刚叶闰平南昌大学化学化工学院江西南昌330031

CO_(2)加氢制甲烷(即“CO_(2)甲烷化”)是实现碳中和目标的重要途径。CeO_(2)由于具有丰富的表面氧空位和优异的储氧性能被认为是重要的催化剂载体之一,过渡金属Ni也因为具有优异的催化性能和低廉的价格被广泛应用于催化剂的研究,CeO_(2... 详细信息

CO_(2)加氢制甲烷(即“CO_(2)甲烷化”)是实现碳中和目标的重要途径。CeO_(2)由于具有丰富的表面氧空位和优异的储氧性能被认为是重要的催化剂载体之一,过渡金属Ni也因为具有优异的催化性能和低廉的价格被广泛应用于催化剂的研究,CeO_(2)和金属Ni结合形成的Ni/CeO_(2)基催化剂在CO_(2)甲烷化反应中展现了良好的应用前景。阐述了Ni/CeO_(2)基催化剂催化CO_(2)甲烷化的机理,介绍了Ni/CeO_(2)基催化剂制备方法,重点总结了活性中心特征、载体性质、助剂类型和金属-载体相互作用等影响Ni/CeO_(2)基催化CO_(2)甲烷化催化性能的因素,并总结了改性Ni/CeO_(2)基催化剂的催化性能。分析发现,通过对Ni/CeO_(2)基催化剂进行改性,可以调控Ni/CeO_(2)基催化剂的CO_(2)甲烷化催化性能与产物选择性,可为提升其CO_(2)甲烷化催化性能提供新的思路。

关键词： Ni/CeO_(2)基催化剂 CO_(2)甲烷化金属-载体相互作用制备方法

CdS-sensitized 3D ordered macroporous g-C_(3)N_(4)for enhanced visible-light photocatalytic hydrogen generation

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Journal of Materials Science & Technology 2022年第16期111卷 204-210页

作者： Xuewen Wang Qiuchan Li Qingzhuo Lin rongbin zhang Mingyue Ding Key Laboratory of Jiangxi Province for Environment and Energy Catalysis College of ChemistryNanchang UniversityNanchang 330031China Key Laboratory of Accoutrement Technique in Fluid Machinery and Power Engineering Wuhan UniversityWuhan 430072China

Carbon nitride(g-C_(3)N_(4))is an attractive photocatalyst but commonly suffers from high photogenerated electron-hole recombination rate,low specific surface area,and narrow visible-light response ***,3D ordered macroporous(3DOM)g-C_(3)N_(4)/CdS was constructed by a feasible and inexpensive synthesis strategy of using template and light-assisted methods to solve the above *** formed heterostructure with suitable morphology,band structure,and extended light absorption range is beneficial to promoting photocatalytic Hgeneration.3DOM g-C_(3)N_(4)/Cd S exhibits a high Hproduce rate of718.6μmol hg,which is 73.3 times higher than that of g-C_(3)N_(4)and 25.4 times higher than that of3DOM g-C_(3)N_(4).The 3DOM structure can effectively increase the path length of light of g-C_(3)N_(4),improve the light energy conversion efficiency,and shorten the carrier transport *** enhances visiblelight response and produces many surface *** a stable and tight interface between 3DOM g-C_(3)N_(4)and Cd S can promote the migration of photogenerated electrons and holes and consequently the visible-light catalytic *** study offers an effective designing strategy for heterostructure photocatalysts to achieve high activity and stable solar H2production.

关键词： Carbon nitride CdS Macropore Photocatalytic H2 evolution

平原河网水动力优化调度与水环境改善的响应关系研究

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水力发电学报 2024年第8期43卷 98-111页

作者：王添侯精明栾广学申腾飞张荣斌沈健孙学良西安理工大学省部共建西北旱区生态水利国家重点实验室西安710048 中规院(北京)规划设计有限公司北京100044

平原河网河道流动性较差是引起水环境污染严重的主要原因,引调水是改善平原河网地区水环境的重要措施之一。本文以佛山市三山围为例,基于实测资料构建了河网水动力水质耦合模型,采用15天的连续水动力水质监测数据对模型进行了验证,并将... 详细信息

平原河网河道流动性较差是引起水环境污染严重的主要原因,引调水是改善平原河网地区水环境的重要措施之一。本文以佛山市三山围为例,基于实测资料构建了河网水动力水质耦合模型,采用15天的连续水动力水质监测数据对模型进行了验证,并将NSE和RMSE模型评价指标用于模型评价。同时结合地势、潮汐规律和景观水位等设计了4种闸控模式和7种景观控制水位,共28种模拟工况,模拟分析了不同条件下的水动力水质改善与内外江潮位变化、引排水流量及其空间分布、闸控方式和景观水位等综合响应机理。结果表明:构建的模型合理可靠。研究区域受引排水路径的影响,河道流动性差异较为显著。综合考虑河道流量分布、水流路径、分汊河道分流作用和外江污染物浓度等对河道水质的作用效果并有效结合潮汐河网的动态水环境容量和污染源排放的时空分布对水环境的改善作用将非常显著。与低景观控制水位相比,高景观控制水位的内江动态水环境容量相对较大,污染物浓度较低。景观控制水位从0.2 m上升至0.8 m时,不同引调水路径的引水流量上升28.00%~64.70%,断面氨氮浓度削减了0.85~5.50 mg/L,削减比例达到28.89%~67.23%。本研究为平原潮汐河网水环境优化调度研究提供了新的思路,为相关部门对平原河网的水环境改善提供了重要的参考。

关键词：暴雨洪水管理模型一维河网模型引调水方案景观控制水位水动力水质耦合

A theoretical insight about co-pyrolysis reaction of natural gas and coal

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Chinese Journal of Chemical Engineering 2023年第11期63卷 220-225页

作者： Mingjun Pan Chengkai Jin Bingying Han Runping Ye rongbin zhang Gang Feng School of Future Technology School of Chemistry and Chemical EngineeringInstitute of Applied ChemistryNanchang UniversityNanchang 330031China School of Chemistry and Chemical Engineering Nanchang UniversityNanchang 330031China State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China

The co-pyrolysis of natural gas and coal is a promising way for the production of acetylene due to its high efficiency for energy and hydrogen *** work investigated the thermodynamics for the copyrolysis reaction of natural gas and coal using density functional *** favorable reaction conditions are presented in the form of phase *** calculation results show that the extra amount of methane may benefit the production of acetylene in the co-pyrolysis reaction,and the C/H ratio of 1:1,temperature around 3000 K and pressure at 0.1 MPa are most *** results would provide basic data for related industrial process for the production of acetylene.

关键词： Natural gas Thermodynamics Hydrocarbons Co-pyrolysis Gibbs free energy Density functional theory

ZnO sheets prepared with a light-assisted growth method for improved photodegradation performance

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Journal of Energy Chemistry 2016年第4期25卷 636-640页

作者： Xuewen Wang Yuanquan Miao Wuyou Wang Gang Feng rongbin zhang The Institute of Applied Chemistry Department of ChemistryNanchang University

ZnO as a semiconductor photocatalyst is widely applied in the photodegradation of organic pollutants. Its photocatalytic activity is greatly decreased because of the recombination of photoexcited electrons and holes in the bulk. In this work, ZnO sheets are synthesized by adjusting the NaOH concentration under light irradiation at room temperature. Compared with ZnO particles, the ZnO sheets prepared with a light-assisted growth method exhibit a higher rate of photodegradation of methylene blue under UV visible light irradiation. The improved photodegradation rate is mainly attributed to the shortened transport distance of photoexcited electrons, the high surface area, and the surface atom structure modified by the light-assisted growth process. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： ZnO sheets Light-assisted Photodegredation Transport distance

All-solid-state Z-scheme BiVO_(4)-Bi_(6)O_(6)(OH)_(3)(NO_(3))_(3)heterostructure with prolonging electron-hole lifetime for enhanced photocatalytic hydrogen and oxygen evolution

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Journal of Materials Science & Technology 2021年第18期77卷 117-125页

作者： Wuyou Wang Xuewen Wang Lei Gan Xinfei Ji Zili Wu rongbin zhang Key Laboratory of Jiangxi Province for Environment and Energy Catalysis the College of ChemistryNanchang UniversityNanchang 330031China Center for Nanophase Materials Sciences Oak Ridge National LabOak Ridge 37831USA

As a visible-light response photocatalyst,BiVO_(4)is widely used in photocatalytic oxygen *** this study,a novel BiVO_(4)-Bi_(6)O_(6)(OH)_(3)(NO_(3))_(3)(BBN)heterostructure fabricates via a simple one-pot hydrothermal approach is certified to effectively restrain the recombination of carriers by efficient spatial charge *** employing BBN as a reductive-function photocatalyst,a solid-state Z-scheme is constructed to improve the photo-redox capacity of BiVO_(4)and hydrogen production is realized in the BiVO_(4)-BBN heterostructure for the first *** solid-state Z-scheme introduced in the BiVO_(4)-BBN ensures the photoexcited carriers with the powerful redox capacity to participate in the photocatalytic reaction.

关键词： Photocatalysis BiVO_(4)-BBN Solid-state Z-scheme Hydrogen Oxygen

3D macropore carbon-vacancy g-C_(3)N_(4) constructed using polymethylmethacrylate spheres for enhanced photocatalytic H_(2) evolution and CO_(2) reduction

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Journal of Energy Chemistry 2021年第2期30卷 139-146,I0006页

作者： Xuewen Wang Qjuchan Li Lei Gan Xinfei Ji Fayun Chen Xinke Peng rongbin zhang Key Laboratory of Jiangxi Province for Environment and Energy Catalysis The College of ChemistryNanchang UniversityNanchang 330031JiangxiChina College of Chemistry and Environmental Science Shangrao Normal UniversityShangrao 334001JiangxiChina Jiangxi Energy Sales Co. LtdNanchang 330031Jiangxi.China

Metal-free g-C_3N_4 is widely used in photocatalytic reactions owing to its suitable band ***, it has low specific surface area and insufficient absorbance for visible light, and its photoexcited carriers have high recombination rates. In this study, the 3 D macropore C-vacancy g-C_3N_4 was prepared through a facile one-step route. Polymethylmethacrylate is used as a template to increase the surface reaction sites of g-C_3N_4 and extend its visible-light range. Compared to unmodified g-C_3N_4, the H2 production and CO_2 reduction rates of the fabricated g-C_3N_4 significantly improved. The special pore structure significantly improved the light utilization efficiency of g-C_3N_4 and increased the number of surface-active sites. The introduction of C-vacancy extended the absorption band of visible-light and suppressed the carrier recombination. The newly developed synthesis strategy can improve solar energy conversion efficiency and potentially modifies g-C_3N_4.

关键词： Carbon nitride Macropore Photocatalytic H_(2)evolution CO_(2)reduction

Performance of pond–wetland complexes as a preliminary processor of drinking water sources

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Journal of Environmental Sciences 2016年第1期28卷 119-133页

作者： Weidong Wang Jun Zheng Zhongqiong Wang rongbin zhang Qinghua Chen Xinfeng Yu Chengqing Yin Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Jiaxing Water Conservancy Investment Co. Ltd. Jiaxing 314033 China Jiaxing Jiayuan Water Supply and Drainage Co. Ltd. Jiaxing 314001 China

Shijiuyang Constructed Wetland（110 hm^2） is a drinking water source treatment wetland with primary structural units of ponds and plant-bed/ditch systems. The wetland can process about 250,000 tonnes of source water in the Xincheng River every day and supplies raw water for Shijiuyang Drinking Water Plant. Daily data for 28 months indicated that the major water quality indexes of source water had been improved by one grade. The percentage increase for dissolved oxygen and the removal rates of ammonia nitrogen, iron and manganese were 73.63%, 38.86%, 35.64%, and 22.14% respectively. The treatment performance weight of ponds and plant-bed/ditch systems was roughly equal but they treated different pollutants preferentially. Most water quality indexes had better treatment efficacy with increasing temperature and inlet concentrations. These results revealed that the pond–wetland complexes exhibited strong buffering capacity for source water quality improvement. The treatment cost of Shijiuyang Drinking Water Plant was reduced by about 30.3%. Regional rainfall significantly determined the external river water levels and adversely deteriorated the inlet water quality, thus suggesting that the ＂hidden＂ diffuse pollution in the multitudinous stream branches as well as their catchments should be the controlling emphases for river source water protection in the future. The combination of pond and plant-bed/ditch systems provides a successful paradigm for drinking water source pretreatment. Three other drinking water source treatment wetlands with ponds and plant-bed/ditch systems are in operation or construction in the stream networks of the Yangtze River Delta and more people will be benefited.

关键词： Pond–wetland combination Plant-bed/ditch system Constructed root channel technology Semi-subsurface flow wetland Weighted comprehensive water quality index

Synthesis of cobalt-doped ZnO/rGO nanoparticles with visible-light photocatalytic activity through a cobalt-induced electrochemical method

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Journal of Energy Chemistry 2017年第3期26卷 549-555页

作者： Yuanquan Miao Xuewen Wang Wuyou Wang Chengxi Zhou Gang Feng Jianxin Cai rongbin zhang The Institute of Applied Chemistry The College of ChemistryNanchang UniversityNanchang 330031JiangxiChina School of Resources Environmental&Chemical Engineering Nanchang UniversityNanchang 330031JiangxiChina

ZnO is a semiconductor photocatalyst widely applied in photodegradation of organic pollutants and in photoelectric conversion. ZnO exhibits low photocatalytic activity due to poor absorption in the visible region. In this work, a novel cobalt-induced electrochemical growth method was developed to synthesize cobalt-doped ZnO/rGO nanoparticles in an aqueous solution at room temperature. Cobalt-doped ZnO/rGO nanoparticles exhibited wider visible-light absorption band ranging from 400 nm to 700 nm due to cobalt doping. The surface structure of ZnO formed by the cobalt-induced electrochemical method without other ions is suitable for photocatalytic reactions. The cobalt-doped ZnO/rGO nanoparticles were found to exhibit in photodegradation and photo-electrochemical measurements and exhibited enhanced photocatalytic activity under visible-light irradiation.

关键词： Co-doped ZnO Electrochemical Photodegradation Photocatalysis