Preparation and characterization of Cu modified BiYO3 for carbon dioxide reduction to formic acid
Preparation and characterization of Cu modified BiYO3 for carbon dioxide reduction to formic acid
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DOI：
10.1016/j.apcatb.2016.09.035
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发表时间：
2017-03-01
影响因子：
22.1
通讯作者：
Ji, Hongbing
中科院分区：
文献类型：
--
作者：
Su, Tongming;Tian, Hui;Ji, Hongbing
采用水热法合成了不同铜掺杂量的氧化铋(BiYO_3)光催化剂，并对其进行了表征，并将其用于可见光照射下二氧化碳还原为甲酸的光催化反应。当掺铜量为2.0%时，比表面积从6.75m(2)/g增加到18.64m(2)/g。傅立叶变换拉曼光谱结果表明，铜掺杂后形成了氧空位，抑制了电荷复合，电化学阻抗谱(EIS)证明了铜/BiYO_3具有较好的电子传输能力。以2.0%的铜/BiYO_3为光催化剂，光催化还原CO_2的HCOOH量为2.04 mU·mol/L，是BiYO_3的2.2倍。2.0%Cu/BiYO_3的高性能可以归因于其比表面积的增加、光吸收的增加和有效的电荷分离。(C)2016爱思唯尔B.V.保留所有权利。
Bismuth yttrium oxide (BiYO3) photocatalysts doped with different Cu amounts were synthesized via a hydrothermal method, characterized and applied for the photocatalytic reduced CO2 to formic acid under the visible light irradiation. The particle size of Cu/BiYO3 was smaller than that of BiYO3, and the surface area of BiYO3 was increased from 6.75 m(2)/g to 18.64 m(2)/g when the Cu doping amount of was 2.0%. The FT-Raman results reveal the formation of oxygen vacancies after doping with Cu, which suppressed the charge recombination, and the electrochemical impedance spectroscopy (EIS) proved that the Cu/BiYO3 has a better electronic transmission capacity. The HCOOH amount of photocatalytic reduction of CO2 was 2.04 mu mol/mL by using 2.0% Cu/BiYO3 as photocatalyst, which was 2.2 times than that of BiYO3. The highly improved performance of the 2.0% Cu/BiYO3 can be ascribed to the increased surface area, increased light absorption, and efficient charge separation. (C) 2016 Elsevier B.V. All rights reserved.