Fe_(2)O_(3)/ZnO/Ag ternary composite photocatalytic material was prepared by simple hydrothermal method,and its structure and photocatalytic properties were studied.The experimental results show that Fe_(2)O_(3)/ZnO/A...Fe_(2)O_(3)/ZnO/Ag ternary composite photocatalytic material was prepared by simple hydrothermal method,and its structure and photocatalytic properties were studied.The experimental results show that Fe_(2)O_(3)/ZnO/Ag exhibits better photocatalytic performance.After two hours of UV irradiation,the degradation rates of orange Ⅱ and methyl orange reached 91.9% and 75.9%,respectively.The design and preparation of the photocatalyst provide a theoretical basis for the practical application of photocatalytic technology.展开更多
利用热分解法制备了结构明确的负载型纳米晶催化剂。在纳米晶成核和生长过程中加入一维ZnO纳米棒作为晶种,调控不同组分的纳米晶在ZnO纳米棒表面均匀生长,从而获得了结构明确的MnO/ZnO、Co_(3)O_(4)/ZnO、Co_(3)Mn_(1)/ZnO催化剂。透射...利用热分解法制备了结构明确的负载型纳米晶催化剂。在纳米晶成核和生长过程中加入一维ZnO纳米棒作为晶种,调控不同组分的纳米晶在ZnO纳米棒表面均匀生长,从而获得了结构明确的MnO/ZnO、Co_(3)O_(4)/ZnO、Co_(3)Mn_(1)/ZnO催化剂。透射电子显微镜(TEM)与X射线粉末衍射(XRD)结果显示,不同组分纳米颗粒都均匀分散在ZnO纳米棒表面。相对于MnO/ZnO和Co_(3)O_(4)/ZnO催化剂,Co_(3)Mn_(1)/ZnO催化剂在CO氧化反应中具有最佳的催化性能。在200 L·g_(cat)^(-1)·h^(-1)的气时空速下,Co_(3)Mn_(1)/ZnO催化剂起活温度为50℃,其T100(CO转化率达到100%时的温度)为200℃;利用X射线光电子能谱(XPS)对不同催化剂进行了分析,结果显示,Co_(3)Mn_(1)/ZnO催化剂的氧空位比MnO/ZnO催化剂提高了30%以上,从而使其具有较高的CO氧化催化性能。更为重要的是,Co_(3)Mn_(1)/ZnO复合纳米晶催化剂的活化能(39.4 k J·mol^(-1))远低于其它负载型纳米晶催化剂。展开更多
基金Funded in Part by the 14th Five Year Plan Hubei Provincial Advantaged Characteristic Disciplines(Groups) Project of Wuhan University of Science and Technology(No.2023A0203)the Natural Science Foundation of Hubei Province(No.2022CFA003)。
文摘Fe_(2)O_(3)/ZnO/Ag ternary composite photocatalytic material was prepared by simple hydrothermal method,and its structure and photocatalytic properties were studied.The experimental results show that Fe_(2)O_(3)/ZnO/Ag exhibits better photocatalytic performance.After two hours of UV irradiation,the degradation rates of orange Ⅱ and methyl orange reached 91.9% and 75.9%,respectively.The design and preparation of the photocatalyst provide a theoretical basis for the practical application of photocatalytic technology.
文摘利用热分解法制备了结构明确的负载型纳米晶催化剂。在纳米晶成核和生长过程中加入一维ZnO纳米棒作为晶种,调控不同组分的纳米晶在ZnO纳米棒表面均匀生长,从而获得了结构明确的MnO/ZnO、Co_(3)O_(4)/ZnO、Co_(3)Mn_(1)/ZnO催化剂。透射电子显微镜(TEM)与X射线粉末衍射(XRD)结果显示,不同组分纳米颗粒都均匀分散在ZnO纳米棒表面。相对于MnO/ZnO和Co_(3)O_(4)/ZnO催化剂,Co_(3)Mn_(1)/ZnO催化剂在CO氧化反应中具有最佳的催化性能。在200 L·g_(cat)^(-1)·h^(-1)的气时空速下,Co_(3)Mn_(1)/ZnO催化剂起活温度为50℃,其T100(CO转化率达到100%时的温度)为200℃;利用X射线光电子能谱(XPS)对不同催化剂进行了分析,结果显示,Co_(3)Mn_(1)/ZnO催化剂的氧空位比MnO/ZnO催化剂提高了30%以上,从而使其具有较高的CO氧化催化性能。更为重要的是,Co_(3)Mn_(1)/ZnO复合纳米晶催化剂的活化能(39.4 k J·mol^(-1))远低于其它负载型纳米晶催化剂。
