过氧化氢
光催化
试剂
异质结
材料科学
吸收(声学)
氧气
能量转换效率
制氢
化学工程
分解
光化学
化学
氢
催化作用
光电子学
有机化学
复合材料
工程类
作者
Xueqing Li,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jianmei Lu
标识
DOI:10.1016/j.jcis.2023.06.062
摘要
The production of hydrogen peroxide (H2O2) from oxygen and water is an attractive route for converting solar energy into chemical energy. In order to achieve high solar-to-H2O2 conversion efficiency, floral inorganic/organic (CdS/TpBpy) composite with strong oxygen absorption and S-scheme heterojunction was synthesized by simple solvothermal-hydrothermal methods. The unique flower-like structure increased the active sites and oxygen absorption. The existence of S-scheme heterojuntion facilitated the charge transfer across the built-in electric field. Without sacrificial reagents or stabilizers, the optimal CdS/TpBpy had a higher H2O2 production (3600 µmol g-1 h-1), which was 2.4 and 25.6 times than those of TpBpy and CdS, respectively. Meanwhile, CdS/TpBpy inhibited the H2O2 decomposition, thus increasing the overall output. Furthermore, a series of experiments and calculations were carried out to verify the photocatalytic mechanism. This work demonstrates a modification method to improve the photocatalytic activity of hybrid composites, and shows potential applications in energy conversion.
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