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首页> 外文期刊>RSC Advances >Photocatalytic reduction of CO2 using molybdenum-doped titanate nanotubes in a MEA solution
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Photocatalytic reduction of CO2 using molybdenum-doped titanate nanotubes in a MEA solution

机译：在MEA溶液中使用钼掺杂的钛酸酯纳米管光催化还原CO2

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In this study, the photocatalytic reduction of CO2 in a monoethanolamine solution to form valuable energy sources was investigated using Mo-doped TNTs photocatalysts for the first time. The results revealed that the structure of Mo-doped TNTs changed with the increase of calcination temperature. For Mo-doped TNTs calcined at 500 degrees C, the partial corruption of titanate nanotubes into anatase particles caused the reduction of Mo species from Mo6+ to Mo5+ and produced oxygen vacancies, which resulted in the highest CO2 reduction ability. The yield rates of CH4, CO and total combustible organic compounds were 0.52, 10.41 and 13.53 mu mol g(cat)(-1), respectively, under UVA (8 W, 63 mu W cm(-2)) irradiation. The photoreduction quantum efficiencies of CH4 and CO were achieved at 0.036% and 0.180%, respectively. It was found that the molybdenum structure and oxygen vacancies could be the key factors controlling the photocatalytic reduction efficiency of CO2. A possible structure transformation of Mo-doped TNTs at different calcination temperatures was inferred and the reaction mechanism for photocatalytic CO2 reduction with oxygen vacancy sites of Mo-doped TNTs was proposed.
机译：在这项研究中，首次研究了使用Mo掺杂的TNTs光催化剂对单乙醇胺溶液中的CO2进行光催化还原以形成有价值的能源。结果表明，随着焙烧温度的升高，Mo掺杂TNTs的结构发生变化。对于在500摄氏度下煅烧的掺Mo的TNT，钛酸盐纳米管部分分解为锐钛矿颗粒导致Mo物种从Mo6 +还原为Mo5 +并产生氧空位，从而导致最高的CO2还原能力。在UVA（8 W，63 mu W cm（-2））照射下，CH4，CO和总可燃有机化合物的产率分别为0.52、10.41和13.53μmolmol g（cat）（-1）。 CH4和CO的光还原量子效率分别达到0.036％和0.180％。研究发现，钼的结构和氧空位可能是控制CO2光催化还原效率的关键因素。推导了不同煅烧温度下Mo掺杂TNTs可能的结构转变，提出了Mo掺杂TNTs氧空位催化光催化还原CO 2的反应机理。

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