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Photocatalytic water splitting of ternary graphene-like photocatalyst for the photocatalytic hydrogen production
Frontiers of Environmental Science & Engineering ( IF 6.1 ) Pub Date : 2020-04-26 , DOI: 10.1007/s11783-020-1248-7
Yan Zhang , Yuyan Zhang , Xue Li , Xiaohan Zhao , Cosmos Anning , John Crittenden , Xianjun Lyu

In recent times, there has been an increasing demand for energy which has resulted in an increased consumption of fossil fuels thereby posing a number of challenges to the environment. In the course finding possible solutions to this environmental canker, solar photocatalytic water splitting to produce hydrogen gas has been identified as one of the most promising methods for generating renewable energy. To retard the recombination of photogenerated carriers and improve the efficiency of photocatalysis, the present paper reports a facile method called the hydrothermal method, which was used to prepare ternary graphene-like photocatalyst. A “Design Expert” was used to investigate the influence of the loading weight of Mo and GO as well as the temperature of hydrothermal reaction and their interactions on the evolution of hydrogen (H2) in 4 h. The experimental results showed that the ternary graphene-like photocatalyst has a strong photocatalytic hydrogen production activity compared to that of pure SiC. In particular, the catalyst added 2.5 wt% of GO weight yielded the highest quantum of 21.69 % at 400–700 nm of wavelength. The optimal evolution H2 in 4 h conditions was obtained as follows: The loading weight of Mo was 8.19 wt%, the loading weight of GO was 2.02 wt%, the temperature of the hydrothermal reaction was 200.93°C. Under the optimum conditions, the evolution of H2 in 4 h could reach 4.2030 mL.



中文翻译:

三元石墨烯状光催化剂的光催化水分解法用于光催化制氢

近年来,对能源的需求不断增长,导致化石燃料的消耗增加,从而对环境提出了许多挑战。在寻找这种环境溃疡的可能解决方案的过程中,已经将太阳能光催化水分解以产生氢气的方法确定为产生可再生能源的最有希望的方法之一。为了阻止光生载流子的重组并提高光催化效率,本文报道了一种称为水热法的简便方法,该方法用于制备三元石墨烯状光催化剂。使用“设计专家”研究了Mo和GO的负载量以及水热反应的温度及其相互作用对氢(H2)在4小时内。实验结果表明,与纯SiC相比,三元石墨烯状光催化剂具有较强的光催化产氢活性。特别是,催化剂添加了GO重量的2.5 wt%,在400-700 nm波长处产生的最大量子量为21.69%。在4小时条件下获得最佳析出H 2:Mo的负载量为8.19wt%,GO的负载量为2.02wt%,水热反应的温度为200.93℃。在最佳条件下,4 h内的氢气逸出量可达4.2030 mL。

更新日期:2020-04-26
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