当前位置: X-MOL 学术Environ. Prog. Sustain. Energy › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Photocatalytic water splitting with noble‐metal free cocatalysts for a comprehensive study of two nonidentical photoreactors designs
Environmental Progress & Sustainable Energy ( IF 2.8 ) Pub Date : 2020-11-13 , DOI: 10.1002/ep.13557
Jean César Marinozi Vicentini 1 , Rafael Manieri 1 , Gimerson Weigert Subtil 1 , Fernanda Oliveira Tavares 1 , Daiane Marques Oliveira 1 , Patrícia Hissae Yassue‐Cordeiro 2 , Heveline Enzweiler 3 , Marcelino Luiz Gimenes 1 , Maria do Carmo Martins Alves 4 , Jonder Morais 5 , Mara Heloisa Neves Olsen Scaliante 1 , Marcos Souza 1
Affiliation  

Here, the authors (i) discuss the most prominent co‐catalyst for H2 generation structured in the form of Me‐TiO2/MCM‐41 (Me: Ag, Co, Cu, Ni) based on structural, electronic, textural, morphological and optical characterization techniques, such as XRD, wide and small angle, XPS, Fourier‐transform infrared spectroscopy, scanning electron microscopy, B.E.T., textural analysis, photoacoustic spectroscopy and photoluminescence spectroscopy; and (ii) evaluate the difference in hydrogen production in two distinct geometric reactors based on a theoretical study of light distribution inside the reactors supported by the experimental quantum yield calculation. As a result, copper‐doped photocatalyst generated higher hydrogen amount compared to the others. The high photocatalyst performance was due to the greater lamp spectrum absorption, marked by the low bandgap value, and high photoactivity justified by the low rate of electronic recombination. The hydrogen generation in the quartz reactor was seven times higher than the annular one, and when at maximum light power, it is comparable to the most sophisticated reaction systems found in literature. The larger light exposure area per unit volume of the quartz reactor compared to the annular one is the reason why it obtained better results due to the lower emitted photon blockade, with a 1.81% apparent quantum yield.

中文翻译:

与两种不含贵金属的光反应器设计的综合研究,用无贵金属的助催化剂进行光催化水分解

在这里,作者(i)讨论了以Me‐TiO 2形式构造的H 2生成的最杰出的助催化剂/ MCM‐41(Me:Ag,Co,Cu,Ni),基于结构,电子,结构,形态和光学表征技术,例如XRD,宽和小角度,XPS,傅立叶变换红外光谱,扫描电子显微镜, BET,组织分析,光声光谱和光致发光光谱;(ii)根据理论量子产率计算所支持的反应堆内部光分布的理论研究,评估两个不同几何反应堆中氢产生的差异。结果,与其他催化剂相比,掺杂铜的光催化剂产生了更高的氢量。高光催化剂性能归因于较低的带隙值和较高的光吸收性,其特征在于低的带隙值,以及较高的光活性,这归因于电子重组率低。石英反应器中的氢气生成量比环形反应器高7倍,并且在最大光功率下,它可与文献中发现的最复杂的反应系统相提并论。与环形反应堆相比,石英反应堆的每单位体积较大的曝光面积是由于较低的发射光子阻滞而获得更好结果的原因,表观量子产率为1.81%。
更新日期:2020-11-13
down
wechat
bug