Z型异质结“(金属氧化物MOx@薄层碳TC)/BiO1-xCl”的可控构筑及其光催化性能的研究
结题报告
批准号:
22005126
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
孙立鸣
依托单位:
学科分类:
复合与杂化材料化学
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
孙立鸣
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中文摘要
氯氧铋BiOCl基异质结具有较高的光生电子和空穴的分离率,在光催化污染物降解方面得到了广泛应用。然而,由于BiOCl基异质结中光生电子和空穴难以实现定向迁移,导致其氧化还原能力减弱,限制了其在光催化有机物定向转化方面的应用。针对上述问题,本项目拟以表面氧空位丰富的BiO1-xCl薄片作为基体,采用逐层自组装法,构建BiO1-xCl@MOFs前驱体,将MOFs热解,制备得到由薄层石墨碳均匀包覆的金属氧化物与BiO1-xCl复合而成的Z型(MOx@TC)/BiO1-xCl异质结。通过调控氧空位的位置,实现该Z型异质结中光生电子和空穴的定向迁移,达到足够高的氧化能力将水氧化成羟基自由基,同时利用MOFs热解产生的薄层石墨碳对有机物的吸附与活化作用,降低苯羟基化制苯酚反应的活化能,实现在可见光驱动下水氧化苯制苯酚,拓展BiOCl基光催化剂在有机物定向转化领域的应用范围。
英文摘要
BiOCl-based heterojunctions have attracted numerous attentions as the photocatalysts of pollutant degradation, due to their high separation efficiency of photo-generated electrons and holes. However, the redox abilities of such heterojunctions can be reduced by the uncontrollable migration of photo-generated electrons and holes, limiting their applications in photocatalytic directional conversions of organic compounds. Accordingly, in this project, we propose to build Z-scheme (MOx@TC)/BiO1-xCl heterojunctions based on BiO1-xCl and carbon thin layer (TC) uniformly coated metal oxide semiconductors (MOx@TC), where BiO1-xCl is formed by introducing controllable amounts of surface oxygen vacancy (VO) to BiOCl. In the synthetic process, BiO1-xCl@MOFs fabricated by layer-by-layer method will be chosen as the pyrolytic precursor of (MOx@TC)/BiO1-xCl. The directional migration of photo-generated electrons and holes can be obtained by controlling the location of oxygen vacancy, leading to the high enough redox ability of the heterojunctions to oxidize H2O into ∙OH; the carbon thin layer derived from MOFs can favor the adsorption and activation of organic compounds, decreasing active energy of the “hydroxylation of bezene by H2O to phenol” reaction. Combining these favourable structural features, the Z-scheme (MOx@TC)/BiO1-xCl heterojunctions can act as photocatalysts of “hydroxylation of bezene by H2O to phenol” reaction and expand applications of BiOCl-based heterojunctions to directional conversions of organic compounds.
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Construction of a micro-nano reactor assembled by TiO2/N-C ultrathin sheets for photocatalytic H2 evolution.
TiO2/N-C超薄片组装的微纳米反应器的构建用于光催化析氢。
DOI:10.1039/d3cc01322g
发表时间:2023
期刊:Chemical Communications
影响因子:4.9
作者:Yu Wang;Wenwen Zhan;Lei Yang;Jianwei Zhao;Liming Sun;Xiaojun Wang;Xiaochi Han
通讯作者:Xiaochi Han
DOI:10.1039/d0ta10831f
发表时间:2021-02
期刊:Journal of Materials Chemistry
影响因子:--
作者:Yun Yang;Liming Sun;Wenwen Zhan;Xiaojun Wang;Xiguang Han
通讯作者:Yun Yang;Liming Sun;Wenwen Zhan;Xiaojun Wang;Xiguang Han
DOI:10.1021/acs.inorgchem.1c00076
发表时间:2021-05-25
期刊:INORGANIC CHEMISTRY
影响因子:4.6
作者:Hao, Juan;Long, Zhouyang;Han, Xiguang
通讯作者:Han, Xiguang
DOI:10.1021/acscatal.3c03494
发表时间:2023-10
期刊:ACS Catalysis
影响因子:12.9
作者:Haobo Zhang;Shuo Zhou;Dong Li;Wenwen Zhan;Huade Liu;Liming Sun;Mengge Li;Lei Yang;Jianwei Zhao;Xiaoxiao He;Jianhua Xu;Xiguang Han
通讯作者:Haobo Zhang;Shuo Zhou;Dong Li;Wenwen Zhan;Huade Liu;Liming Sun;Mengge Li;Lei Yang;Jianwei Zhao;Xiaoxiao He;Jianhua Xu;Xiguang Han
国内基金
海外基金