材料科学
电极
阳极
光电流
石墨氮化碳
光电化学电池
辐照
分析化学(期刊)
光电子学
电子转移
光催化
电解质
化学工程
化学
光化学
物理化学
催化作用
生物化学
色谱法
工程类
物理
核物理学
作者
Jialin Ma,Xiaona Wang,Xiaohang Zong,Linli Li,Hao Sun,Pimo He,Yuan Yang,Y. Ding,Yuexin Han,Xiaoxing Fan
标识
DOI:10.1088/1361-6463/abd6ad
摘要
Abstract Graphitic carbon nitride (g-C 3 N 4 ) usually shows a low photoelectrochemical (PEC) performance due to its poor conductivity. To improve the transfer of charge carriers generated by g-C 3 N 4 , a TiO 2 /g-C 3 N 4 composite photoanode was prepared by a facile co-electrodeposition method. The composite photoelectrodes exhibit an improved PEC performance compared to TiO 2 and g-C 3 N 4 . The PEC performance was optimized by varying the mass ratio of TiO 2 to g-C 3 N 4 , and a ratio of 1:1 gave the best photocurrent density of 1.81 mA cm −2 , which is 2.27 times larger than that of the pure TiO 2 photoanode under full-arc xenon light. Furthermore, compared with pure g-C 3 N 4 , the photocurrent density is greatly improved. The incident photocurrent efficiency reached 4.14% under irradiation with 365 nm monochromatic light. TiO 2 /g-C 3 N 4 exhibits a stable photocurrent density in a PEC reaction over 2 h. The enhanced PEC performance is attributed to the synergism between TiO 2 and g-C 3 N 4 semiconductors, which improves the interfacial charge transfer and inhibits the photogenerated electron–hole pair recombination.
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