Preparation and characterization of Sm3+/Tm3+ co-doped BiVO4 micro-squares and their photocatalytic performance for CO2 reduction
Preparation and characterization of Sm3+/Tm3+ co-doped BiVO4 micro-squares and their photocatalytic performance for CO2 reduction
复制标题
DOI：
10.1016/j.jtice.2023.104737
复制
发表时间：
2023-03
影响因子：
5.7
通讯作者：
Kaiyan Zhao;Xingqiang Liu;Qingyun He;Wanqin Zhou;Kai Yang;Leiming Tao;Fang Li;Changling Yu
中科院分区：
文献类型：
--
作者：
Kaiyan Zhao;Xingqiang Liu;Qingyun He;Wanqin Zhou;Kai Yang;Leiming Tao;Fang Li;Changling Yu
研究背景太阳能光催化还原CO2制备具有附加值的燃料和化学品引起了人们的广泛关注。方法采用水热法合成了Sm3+/Tm3+共掺杂BiVO4微方块。通过XRD、FT-IR、SEM、TEM、XPS、UV-Vis DRS、EPR、N2物理吸脱附和电化学分析等物理化学方法对制备的样品进行了表征。在氙灯照射下评价了不同稀土含量催化剂的CO2还原能力。重大发现我们发现共掺杂10%Sm和10%Tm（摩尔百分比）的BiVO4光催化剂对CO和CH4生产表现出显着的光催化活性。 10%Sm/10%Tm/BiVO4 的 CO 产率比纯 BiVO4 和单一稀土掺杂 BiVO4 高约 5 倍。活性增强的原因是Sm3+/Tm3+共掺杂降低了光生电子和空穴的复合率，为CO2还原提供了额外的光吸收和更多的活性位点。
BackgroundSolar-driven photocatalytic reduction of CO2to fuels and chemicals with added value has attracted intense attention.MethodsHere, the Sm3+/Tm3+co-doped BiVO4micro-squares were synthesized by hydrothermal method. The prepared samples were characterized by some physicochemical methods such as XRD, FT-IR, SEM, TEM, XPS, UV–Vis DRS, EPR, N2physisorption -desorption and electrochemical analysis. The CO2reduction ability of the catalysts with different rare earth content was evaluated under xenon lamp irradiation.Significant findingsWe found that BiVO4photocatalyst co-doped with 10%Sm and 10%Tm (mole percent) showed the remarkable photocatalytic activity for CO and CH4production. The CO production rate over 10%Sm/10%Tm/BiVO4was around 5 times higher than that of pure BiVO4and single rare earth doped BiVO4. The enhanced activity can be attributed that the Sm3+/Tm3+co-doping reduced the recombination rate of photogenerated electrons and holes, provides additional light absorption and more active sites for CO2reduction.