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A review of updated S-scheme heterojunction photocatalysts

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Journal of Materials Science & Technology 2024年第10期177卷 142-180页

作者： Fangyi Li Guihua Zhu Jizhou Jiang Lang Yang fengxia deng Arramel Xin Li School of Environmental Ecology and Biological Engineering Key Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China National Engineering and Technology Research Center for Development&Utilization of Phosphate Resources Kunming 650600China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Nano Center Indonesia Jalan Raya PUSPIPTEKSouth TangerangBanten 15314Indonesia Institute of Biomass Engineering Key Laboratory of Energy Plants Resource and UtilizationMinistry of Agriculture and Rural AffairsSouth China Agricultural UniversityGuangzhou 510642China

Photocatalysis is a green and environmentally-friendly process that utilizes the ubiquitous intermittent *** date,an emerging S-scheme heterojunction across the intimately coupled heterojunction materials is proposed to surpass the efficiency of conventional Ⅱ-type and Z-type ***-more,S-scheme heterojunction photocatalysts with greatly improved photocatalytic performance have gained significant attention due to their fast charge carriers separation along with strong redox ability and stability,since its proposal in ***,a timely and comprehensive review is highly desired to cover the state-of-the-art *** by this idea,the review conveys the recent progress and provides new insights into further *** the conventional method,in this review,we im-plement a quantification model to outline current trends in S-scheme heterojunctions research as well as their *** overview begins with the fundamentals of four basic photocatalytic mechanisms,followed by its design ***,diverse characterization techniques used in the S-scheme heterojunctions are systematically summarized along with the modification strategies to boost photocat-alytic ***,the internal reaction mechanism and emerging applications have been reviewed,including water conversion,CO_(2) remediation,wastewater treatment,H_(2)0_(2) production,N_(2) fix-ation,*** sum up the review,we present several current challenges and future prospects of the S-scheme heterojunctions photocatalysts,aiming to provide indispensable platforms for the future smart design of photocatalysts.

关键词： S-scheme heterojunctions Photocatalysts Modification strategies Charge separation mechanism

Degradation of Pollutant and Antibacterial Activity of Waterborne Polyurethane/Doped TiO_2 Nanoparticle Hybrid Films

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Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 447-451页

作者：邱珊 deng fengxia XU Shanwen LIU Peng MIN Xinmin 马放 School of Municipal and Environmental Engineering Harbin Institute of Technology State Laboratory of Urban Water Resources and Environment Harbin Institute of Technology School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology

The waterborne polyurethane/doped Ti O2 nanoparticle hybrid films were prepared. Nd, I doped Ti O2 was prepared with a 50 nm particle size firstly. The hybrid film was prepared by mixing doped Ti O2 with waterborne polyurethane, followed by heat treatment. The presence and nanometric distribution of doped Ti O2 nanoparticles in prepared membranes is evident according to SEM images. The photocatalytic activities of doped Ti O2 were signifi cantly enhanced compared with pure Ti O2 powders. After the hybrid fi lm fabrication, the photocatalytic activities were almost the same as the pure catalysts with kMB of 0.046. In the antibacterial testing, the hybrid fi lms can inhibit E. coli growth. A signifi cant decrease in membrane fl uidity and increase of permeability of E. coli were observed.

关键词： doped TiO2 polyurethane hybrid film photocatalytic activity antibacterial

Study on the ability to produce hydrogen peroxide and to regenerate ferrous ions in electro-Fenton with foam nickel as the cathode

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Study on the ability to produce hydrogen peroxide and to reg...

第十三届全国水处理化学大会暨海峡两岸水处理化学研讨会

作者： fengxia deng Jixian Yang Cong Chen Fang Ma Shan Qiu School of Municipal and Environmental Engineering Harbin Institute of Technology

Classical Fenton’s reaction happens in the presence of Fe,HO which produces nonselective oxidation·OH.·OH acts as a strong *** abilit、to react with organics yielding dehydrogenated or hydroxylated derivatives until their overall mineralization(conversion into CO2,water and inorganic ions).The iron catalyst(Fe)activity can be substituted by other transition metals(such as Mn,Cd,Co,Cr,Cu,Mn,Ni,

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叶绿素光敏化降解水中阿特拉津

环境化学 2015年第9期34卷 1748-1751页

作者：刘延湘张旭邓凤霞江汉大学化学与环境工程学院武汉430056 武汉大学资源与环境科学学院武汉430079

为考察阿特拉津在使用过程中的环境行为,实验在模拟太阳光照射下,以叶绿素铜钠盐作为光敏化剂,探讨了阿特拉津光降解的影响因素及降解动力学.结果表明,阿特拉津直接光解较慢,叶绿素铜钠加入可以促进阿特拉津的光降解,具有敏化作用,当阿... 详细信息

为考察阿特拉津在使用过程中的环境行为,实验在模拟太阳光照射下,以叶绿素铜钠盐作为光敏化剂,探讨了阿特拉津光降解的影响因素及降解动力学.结果表明,阿特拉津直接光解较慢,叶绿素铜钠加入可以促进阿特拉津的光降解,具有敏化作用,当阿特拉津初始浓度为2 mg·L-1,加入8 mg·L-1叶绿素铜钠时,阿特拉津的降解率最大,达52.4%.p H影响阿特拉津的光敏化降解,在p H=7时降解率较大,且随着光照时间的增加,阿特拉津的降解率也随之提高.阿特拉津的光降解反应符合一级反应动力学,半衰期为174 min.

关键词：阿特拉津光敏化降解叶绿素

响应面法对泡沫铜阴极电芬顿产H_2O_2与·OH性能优化

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环境工程学报 2018年第1期12卷 93-101页

作者：李国君邱珊朱英实邓凤霞马放哈尔滨工业大学环境学院哈尔滨150090 城市水资源与水环境国家重点实验室哈尔滨150090 哈尔滨工业大学宜兴环保研究院宜兴214205

泡沫金属因其三维结构及优良导电性,使其作为电芬顿阴极开始引起学者关注。选择泡沫铜为阴极、石墨棒为阳极,搭建微孔曝气均匀的玻璃反应器,提高体系传质效率,并通过响应面探索体系产H_2O_2和·OH的机理。用响应面设计3因素(pH、电流、F... 详细信息

泡沫金属因其三维结构及优良导电性,使其作为电芬顿阴极开始引起学者关注。选择泡沫铜为阴极、石墨棒为阳极,搭建微孔曝气均匀的玻璃反应器,提高体系传质效率,并通过响应面探索体系产H_2O_2和·OH的机理。用响应面设计3因素(pH、电流、Fe^(2+)初始浓度)3水平实验,得到体系产H_2O_2和·OH与3种因素之间的非线性回归方程,得到最优条件:当pH=2、电流0.25 A、Fe^(2+)初始浓度为15μmol·L^(-1)时H_2O_2产量最大,为457.27μmol·L^(-1);当pH=2、电流0.25 A、Fe^(2+)初始浓度为20μmol·L^(-1)时·OH产量最多,可达18.56μmol·L^(-1)。根据方差分析,二次模型显著性很高(R_(H_2O_2)~2=0.977 8,R_(·OH)~2=0.964 2),能够很好地模拟实验结果。通过铜溶出实验分析得出铜溶出量在0.4~1.8 mg·L^(-1)之间,符合现行污水排入城镇下水道水质标准(CJ 343-2010)。

关键词：电化学自由基优化设计泡沫铜响应面模型过氧化氢

Temporal and Spatial Dynamics of Virioplankton in Large Shallow Freshwater Lakes,Hubei Province,China

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Temporal and Spatial Dynamics of Virioplankton in Large Shal...

水蒸汽浴FeS_(2)高效Fenton降解甲草胺

第二届中国青年学者微生物遗传学学术研讨会

作者： Kai Cheng, Da Pei, fengxia deng, Wei Liu, Yijun Zhao Hubei Key Laboratory of Urban Water Environmental Ecology, Central China Normal University, Wuhan 430079, China

We carried out annual studies of virioplankton dynamics in several Chinese freshwater lakes with different trophic environments. Water was sampled monthly from 7 sites from August 2004 to July 2005, and we measured the abundance of viruses and bacteria, concentration of nitrogen, phosphorus and chlorophyll a, water transparency, and pH. Our results indicate that viral abundance is more closely related to host density than to the trophic status of the sampling sites. This in turn indicates that viral abundance is directly dependant on bacterial abundance in eutrophic lakes, while trophic status and temperature may only indirectly affect viral abundance. We also found that the slope coefficient of the regression between bacterial and viral abundance is higher in more productive water-bodies, and that the virus-bacteria ratio is significantly lower in less productive water-bodies, indicating that the control of virioplankton on its hosts may change according to the host density;this would help to explain the hypothesis of "Killing the winner".

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物理化学学报 2023年第3期39卷 88-97页

作者：江吉周余良浪李方轶邓文明潘聪王海涛邹菁丁耀彬邓凤霞黄佳武汉工程大学环境生态与生物工程学院化学与环境工程学院化工与制药学院绿色化工程教育部重点实验室磷资源开发利用教育部工程研究中心新型催化材料湖北省工程研究中心武汉430205 中南民族大学资源与环境学院武汉430074 哈尔滨工业大学环境学院城市水资源与水环境国家重点实验室哈尔滨150090

由于硫化铁在自然环境中的丰富性,其生成活性氧和降解各种有机污染物的类Fenton活性已被广泛研究。然而,由于表面含铁活性位点的暴露有限,它们的类Fenton活性通常不高。在本研究中,以黄铁矿(FeS_(2))为例,基于水蒸汽对FeS_(2)的热处理,... 详细信息

由于硫化铁在自然环境中的丰富性,其生成活性氧和降解各种有机污染物的类Fenton活性已被广泛研究。然而,由于表面含铁活性位点的暴露有限,它们的类Fenton活性通常不高。在本研究中,以黄铁矿(FeS_(2))为例,基于水蒸汽对FeS_(2)的热处理,开发了一种提高硫化铁矿物Fenton活性的新策略,研究发现经水蒸汽热处理后的FeS_(2)(Heat-FeS_(2))对甲草胺(ACL)的非均相Fenton活性比由水热反应制备的母体FeS_(2)(Fresh-FeS_(2))更高。在初始pH为6.3时,Heat-FeS_(2)-Fenton体系对ACL的降解速率为0.48 min-1,约为Fresh-FeS_(2)-Fentton体系的23倍。电子自旋共振分析和苯甲酸探针实验证实,与Fresh-FeS_(2)-Fenton体系相比,在Heat-FeS_(2)-Fenton体系中产生更多的羟基自由基(·OH)和超氧自由基(·O_(2)^(-))。HeatFeS_(2)的Fenton活性大幅增强主要可归因于含量增加的高活性表面Fe^(2+)/Fe^(3+)组份、较高的Fe^(2+)浸出量和最佳的反应p H条件。扫描电镜,透射电镜,X射线光电子能谱(XPS)和傅里叶变换红外光谱等一系列表征结果表明,热处理可显著促进晶格Fe^(2+)向表面活性Fe^(2+)的转化,同时增强表面SO42-的生成,从而形成高酸性表面。此外,热处理后Fresh-FeS_(2)表面Fe^(2+)在表面总铁中的百分比从13%提高到了Heat-FeS_(2)的29%,而且Heat-FeS_(2)的Fe^(2+)浸出量(0.23 mmol·L-1)也远高于FreshFeS_(2)的Fe^(2+)浸出量(<0.02mmol·L-1)。为了进一步阐明Heat-FeS_(2)材料ACL降解活性增强的机理,我们通过XPS技术监测类Fenton反应前后Heat-FeS_(2)表面Fe和S物种的变化关系。结果表明,H2O_(2)反应后,Fresh-FeS_(2)和Heat-Fee S_(2)中Fe^(2+)和Fe^(3+)的表面含量显著增加,而S_(2)2-物种的表面浓度则相对下降,证实了S_(2)2-物种在Fe^(3+)还原为Fe^(2+)循环中的关键作用。重要的是,本研究不仅加深了对FeS_(2)氧化转化、腐蚀及其对天然环境中有毒有机物转化与降解的认识,而且还提供了一种基于硫化铁矿物的高效Fenton氧化方法。

关键词： FeS_(2) 水蒸汽处理 Fenton 表面Fe^(2+) 甲草胺

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汽车注塑件典型外观缺陷分析及消除对策

湖北汽车工业学院学报 2015年第1期29卷 47-51页

作者：邓凤霞刘勇东风汽车股份有限公司商品研发院湖北武汉430057 东风商用车有限公司湖北十堰442001

注塑件在制造过程中经常会出现各种外观缺陷,通过列举汽车注塑件成型过程中典型的质量缺陷,结合实际,从产品设计、模具设计与制造、原材料、注塑工艺等方面,剖析了产生外观缺陷的原因,并提出切实可行的解决办法,以期最大限度的减少外观... 详细信息

注塑件在制造过程中经常会出现各种外观缺陷,通过列举汽车注塑件成型过程中典型的质量缺陷,结合实际,从产品设计、模具设计与制造、原材料、注塑工艺等方面,剖析了产生外观缺陷的原因,并提出切实可行的解决办法,以期最大限度的减少外观缺陷,提高注塑件的质量,从而达到满足整车质量目标的要求。

关键词：注塑件外观缺陷分析质量

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超声-泡沫铜耦合降解罗丹明B

水处理技术 2016年第5期42卷 51-55页

作者：冀雅婉邱珊李光明邓凤霞马放哈尔滨工业大学市政环境工程学院哈尔滨工业大学城市水资源与水环境国家重点实验室黑龙江哈尔滨150090

以泡沫铜作为催化剂与超声波耦合降解罗丹明B溶液,分别考察了H2O2投加量、溶液初始pH以及超声功率对罗丹明B降解效果的影响。结果表明,在H_2O_2的投加量为5.0 mmol/L、超声功率300 W、溶液初始pH为3.0的条件下,初始质量浓度为5 mg/L的... 详细信息

以泡沫铜作为催化剂与超声波耦合降解罗丹明B溶液,分别考察了H2O2投加量、溶液初始pH以及超声功率对罗丹明B降解效果的影响。结果表明,在H_2O_2的投加量为5.0 mmol/L、超声功率300 W、溶液初始pH为3.0的条件下,初始质量浓度为5 mg/L的罗丹明B溶液反应25 min,去除率为99.41%,比超声单独作用相比,增加了86.75个百分点。理论分析显示,超声-泡沫铜耦合体系通过羟基自由基氧化和泡沫铜还原协同降解罗丹明B。

关键词：类Fenton 超声波泡沫铜罗丹明B