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Transition metaldoping effect and high catalytic activity of CeO_(2)-TiO_(2) for chlorinated VOCs degradation

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Journal of Rare Earths 2022年第5期40卷 745-752,I0003页

作者： yijun shi Xiaolin Guo Zhinan shi Renxian Zhou Institute of Catalysis Zhejiang UniversityHangzhou 310028China College of Materials and Chemistry China Jiliang University Hangzhou 310018China

A series of transition metals(Fe,Co,Ni,Cu,Cr and Mn)-doped CeO_(2)-TiO_(2) catalysts were prepared by the sol-gel method and applied for the catalytic removal of 1,2-dichloroethane(DCE) as a model for chlorinated VOCs(CVOCs).The various characterization methods including X-ray diffraction(XRD),N_(2) adsorption-desorption,UV-Raman,NH_(3) temperature-programmed desorption(NH_(3)-TPD) and H_(2) temperature-programmed reduction(H_(2)-TPR) were utilized to investigate the physicochemical properties of the *** results show that doping Fe,Co,Ni or Mn can obviously promote the activity of CeO_(2)-TiO_(2) mixed oxides for DCE degradation,which is related to their improved texture properties,acid sites(especially for strong acidity) and low-temperature ***,CeTi-Fe doped with moderate Fe exhibits excellent activity for 1,2-dichloroethane(DCE) degradation,giving a T_(90%) value as low as 250℃.More importantly,only trace chlorinated byproducts were produced during the low-temperature degradation of various CVOCs(dichloromethane(DCM),trichloroethylene(TCE) and chlorobenzene(CB)) over CeTi-Fe1/9 catalyst with high durability.

关键词： Transition metals doping CeO_(2)-TiO_(2)mixed oxides CVOCs degradation High activity Excellent durability Rare earths

Low-temperature VOCs oxidation performance of Pt/zeolites catalysts with hierarchical pore structure

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Journal of Environmental Sciences 2023年第2期124卷 505-512页

作者： Jialu Wang yijun shi Fanzhe Kong Renxian Zhou Institute of Catalysis Department of ChemistryZhejiang UniversityHangzhou 310028China

Different zeolites supported Pt catalystswithmicro-mesoporous structurewere prepared by organic base tetrapropylammonium hydroxide(TPAOH)treatment and their catalytic oxidation activity for various volatile organic compounds(VOCs)were *** results reveal that the synergistic effect between Pt nanoparticles and surface acid sites plays an important role in VOCs low-temperature *** small size and high dispersion of Pt nanoparticles on the surface of the zeolites would promote the catalytic oxidation of aromatics and alkanes over the Pt/zeolite catalysts,while strong acidity and abundant acid sites of catalysts are in favour of the oxidation of the VOCs *** addition,it was found that Pt/ZSM-5 catalyst exhibits the highest oxidation activity for various VOCs low-temperature removal amongst all the catalysts due to the balance of both Pt dispersion and abundant acid sites in the *** comprehensive consideration should be very helpful when designing and preparing novel catalysts for the low-temperature removal of VOCs.

关键词： Pt/zeolites catalyst Hierarchical pore zeolites VOCs oxidation Synergistic effect

New insight into the design of highly dispersed Pt supported CeO_(2)-TiO_(2) catalysts with superior activity for VOCs low-temperature removal

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Green Energy & Environment 2023年第6期8卷 1654-1663页

作者： yijun shi Xiaolin Guo Yiyan Wang Fanzhe Kong Renxian Zhou Institute of Catalysis Department of ChemistryZhejiang UniversityHangzhou310028China College of Materials and Chemistry China Jiliang UniversityHangzhou310018China

A series of CeO_(2)-TiO_(2)mixed oxides supports with various Ce/Ti molar ratio were synthesized by modified coprecipitation method. The corresponding Pt loaded(0.5 wt% Pt) catalysts were prepared by electronless deposition method and evaluated for the deep oxidation of n-hexane as a model VOCs. The results show that the CeO_(2)and TiOxnanoparticles can highly disperse into each other and form Ce_(2)Ti_(2)O_(7)solid solution with appropriate Ce/Ti molar ratio, which significantly improves their redox ability by enhancing the interaction between CeO_(2)and TiO_(x). The dispersibility of Pt species can also be adjusted by altering the Ce/Ti molar ratio, and Pt/CeTi-2/1 catalyst with Ce/Ti molar ratio of 2:1 exhibits the best Pt dispersibility that Pt species mainly exist as Pt single atoms. The high dispersion of Pt species in the Pt/CeO_(2)-TiO_(2)catalysts would promote the catalytic activity of VOCs oxidation with low T90% values(1000 ppm, GHSV = 15,000 h^(-1)), such as for n-hexane degradation with T90% of 139℃. The characterizations reveal that the superior activity is mainly related to possessing the more Pt2+species,adsorbed oxygen species and higher low-temperature reducibility owing to the strong interaction between highly dispersed Pt species and CeO_(2)-TiO_(2)as well as the promoted migration of lattice oxygen by the formation of more Ce_(2)Ti_(2)O_(7)species. Furthermore, the Pt/CeTi-2/1 catalyst also exhibits excellent stability for chlorinated and other non-chlorinated VOCs oxidation, making it very promising for real application under various operating conditions.

关键词： Highly dispersed Pt species CeO_(2)–TiO_(2)mixed oxides VOCs degradation Superior activity

杭州城市空间增长与生态系统服务价值损益关联

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现代城市研究 2024年第3期39卷 110-115页

作者：夏兆煊马淇蔚徐丽华施益军陆张维浙江农林大学风景园林与建筑学院

当前我国正处于城镇化高质量转型的关键时期,明晰城市空间增长与生态系统服务价值(ESV)损益的相互关系对于城市可持续发展具有重要意义。以我国典型的山水城市—杭州为例,基于多源数据,采用空间增长定量解析法、价值当量评估、四象限分... 详细信息

当前我国正处于城镇化高质量转型的关键时期,明晰城市空间增长与生态系统服务价值(ESV)损益的相互关系对于城市可持续发展具有重要意义。以我国典型的山水城市—杭州为例,基于多源数据,采用空间增长定量解析法、价值当量评估、四象限分析模型,阐明城市空间增长和ESV损益的规模强度变化,以此揭示二者空间关系,明确空间关系类型。结果表明:(1)从总体规模和强度特征来看,杭州城市空间增长和ESV损益存在错配现象,即规模上的此消彼长和强度上的同增共减;(2)从空间特征来看,城市空间与ESV的重心整体呈东西相向而行的剧烈转移态势,在方位上增长强度与ESV损耗程度表现为东部一致而西部分歧;(3)增长强度与ESV损耗程度存在高—高、高—低、低—低、低—高4类关系且作用空间存在差异,这是由各类型城市发展政策所致。基于此,提出城市空间增长和ESV保值增益的协同发展策略,以期为城市绿色高质量发展提供决策依据。

关键词：生态系统服务价值城市空间增长空间政策四象限分析杭州

Self-Powered,Long-Durable,and Highly Selective Oil-Solid Triboelectric Nanogenerator for Energy Harvesting and Intelligent Monitoring

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Nano-Micro Letters 2022年第10期14卷 95-107页

作者： Jun Zhao Di Wang Fan Zhang Jinshan Pan Per Claesson Roland Larsson yijun shi Division of Machine Elements Department of Engineering Sciences and MathematicsLuleåUniversity of Technology97187 LuleåSweden Department of Engineering and Design School of Engineering and InformaticsUniversity of SussexBrighton BN19RHUK Division of Surface and Corrosion Science Department of ChemistryKTH Royal Institute of Technology10044 StockholmSweden

Triboelectric nanogenerators(TENGs)have potential to achieve energy harvesting and condition monitoring of oils,the“lifeblood”of ***,oil absorption on the solid surfaces is a great challenge for oil-solid TENG(O-TENG).Here,oleophobic/superamphiphobic O-TENGs are achieved via engineering of solid surface wetting *** designed O-TENG can generate an excellent electricity(with a charge density of 9.1μC m^(−2) and a power density of 1.23 mW m^(−2)),which is an order of magnitude higher than other O-TENGs made from polytetrafluoroethylene and *** also has a significant durability(30,000 cycles)and can power a digital thermometer for self-powered sensor ***,a superhigh-sensitivity O-TENG monitoring system is successfully developed for real-time detecting particle/water contaminants in *** O-TENG can detect particle contaminants at least down to 0.01 wt%and water contaminants down to 100 ppm,which are much better than previous online monitoring methods(particle>0.1 wt%;water>1000 ppm).More interesting,the developed O-TENG can also distinguish water from other contaminants,which means the developed O-TENG has a highly water-selective *** work provides an ideal strategy for enhancing the output and durability of TENGs for oil-solid contact and opens new intelligent pathways for oil-solid energy harvesting and oil condition monitoring.

关键词： Oil Triboelectric nanogenerator Energy harvesting Intelligent monitoring

臭氧活性炭深度处理工艺中微生物泄漏防控的生产性试验研究

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复旦学报（自然科学版） 2024年第4期63卷 538-544页

作者：陆劲蓉窦茵李玲钱云坤施毅君马嘉欣安东上海城投水务(集团)有限公司上海200002 复旦大学环境科学与工程系上海200438

本研究以上海市某水厂臭氧活性炭深度处理工艺为研究对象,研究活性炭滤池微生物泄漏特征,并通过生产性试验优化臭氧和活性炭工艺防控微生物泄漏。优化前活性炭滤池出水中细菌、总大肠菌群和异养菌均有不同程度的泄漏,对应总数分别比进... 详细信息

本研究以上海市某水厂臭氧活性炭深度处理工艺为研究对象,研究活性炭滤池微生物泄漏特征,并通过生产性试验优化臭氧和活性炭工艺防控微生物泄漏。优化前活性炭滤池出水中细菌、总大肠菌群和异养菌均有不同程度的泄漏,对应总数分别比进水时增加了8倍、7倍和21倍;将臭氧投加量控制在0.8 mg·L^(-1)以上,炭滤池反冲洗周期缩短至3 d,同时气冲和水冲时间减少至5 min+5 min,对于控制活性炭滤池微生物泄漏有较好的效果。

关键词：深度处理臭氧活性炭微生物泄漏生产性试验运行周期反冲洗方式

Effect of Cu loading content on the catalytic performance of Cu-USY catalysts for selective catalytic reduction of NO with NH_(3)

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Journal of Environmental Sciences 2023年第4期126卷 445-458页

作者： Jie Wan Haipeng Yang yijun shi Yanjun Liu Jin Zhang Jun Zhang Gongde Wu Renxian Zhou Energy Research Institute Nanjing Institute of TechnologyNanjing 211167China Institute of Catalysis Zhejiang UniversityHangzhou 310028China

Series of Cu-USY zeolite catalyst with different Cu loading content were synthesized through simple impregnation *** obtained catalysts were subjected to selective catalytic reduction of NOxwith NH_(3)(NH_(3)-SCR) performance evaluation,structural/chemical characterizations such as X-ray diffraction (XRD),N2adsorption/desorption,H_(2)temperature-programmed reduction (H_(2)-TPR),NH_(3)temperature-programmed desorption (NH_(3)-TPD) as well as detailed in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) experiments including CO adsorption,NH_(3)adsorption and NO+O_(2)in situ *** show that Cu-USY with proper Cu loading (in this work 5Cu-USY with5 wt.%Cu) could be promising candidates with highly efficient NH_(3)-SCR catalytic performance,relatively low byproduct formation and excellent hydrothermal stability,although its SO_(2)poisoning tolerability needs *** characterizations reveal that such catalytic advantages can be attributed to both active cu species and surface acid centers evolution modulated by Cu *** one hand,Cu species in the super cages of zeolites increases with higher Cu content and being more conducive for NH_(3)-SCR *** the other hand,higher Cu loading leads to depletion of Br?nsted acid centers and simultaneous formation of abundant Lewis acid centers,which facilitates NH_(4)NO_(3)reduction via NH_(3)adsorbed on Lewis acid centers,thus improving SCR ***,Cu over-introduction leads to formation of surface highly dispersed CuOx,causing unfavorable NH_(3)oxidation and inferior N2selectivity.

关键词： NH_(3)-SCR USY zeolite Cu species Brønsted/Lewis acid centers Diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)

Mimics软件系统行三维重建指导胸腔镜下解剖性肺段切除术的临床应用分析

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中国胸心血管外科临床杂志 2024年第1期31卷 59-64页

作者：李爽施益军丁国文孙扬永吕本博刘建超朱静峰江苏大学附属人民医院心胸外科江苏镇江212000

目的探讨Mimics软件系统行三维计算机断层扫描支气管血管成像(three-dimensional computed tomography bronchography and angiography,3D-CTBA)指导胸腔镜下解剖性肺段切除术的临床效果。方法回顾性纳入2020年6月—2022年12月在江苏大学附属人民医院胸外科行胸腔镜肺段切除术患者,术前用交互式医学图像控制系统(Materiaise’s interactive medical image control system,Mimics)制作3D-CTBA的患者纳入观察组,未行3D-CTBA患者纳入对照组,比较两组患者的临床资料。结果共纳入59例患者,其中男29例、女30例,年龄25~79岁。观察组37例,对照组22例。观察组在手术时间[(163.0±48.7)min vs.(188.8±43.0)min,P=0.044]、术中出血量[10.0(10.0,20.0)mL vs.20.0(20.0,35.0)mL,P0.05)。结论对于需行解剖性肺段切除的患者,术前使用Mimics软件制作3D-CTBA有助于准确辨识肺动静脉解剖,缩短手术时间,减少术中出血量,有助于术前判断结节所在位置,减少术前有创定位,减轻患者痛苦,值得临床推广。

关键词： Mimics软件电视胸腔镜三维重建肺段切除术早期肺癌

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健康社区的评估与规划应对——以杭州市大园新城为例

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城市建筑 2024年第13期21卷 99-105页

作者：徐楠卜方浩周歆喻陆仡聪施益军浙江农林大学风景园林与建筑学院

近年来,突发性公共卫生事件对人类的生命健康产生了严重威胁。城市这一重要的生活空间已成为国际社会关注的焦点,而社区作为城市的基本单元,是改善人居环境的重要组成部分。文章通过对国内外健康社区建设现状的研究,从自然环境、建成环... 详细信息

近年来,突发性公共卫生事件对人类的生命健康产生了严重威胁。城市这一重要的生活空间已成为国际社会关注的焦点,而社区作为城市的基本单元,是改善人居环境的重要组成部分。文章通过对国内外健康社区建设现状的研究,从自然环境、建成环境、经济环境、社会环境四个维度系统性构建健康社区评估指标体系,以杭州市大园新城为例进行实证研究,针对社区周边环境、空间建设、社区环境、人群特征及意识、社区治理等方面存在的问题,从健康环境、健康设施、健康服务、健康人群四个角度提出了社区规划应对策略。以期为健康社区研究和建设提供借鉴参考,助力建成健康社区与健康城市。

关键词：健康社区评估体系规划应对大园新城

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