光催化
异质结
罗丹明B
材料科学
无定形固体
X射线光电子能谱
化学工程
光化学
纳米技术
化学
光电子学
催化作用
工程类
有机化学
作者
Hao Deng,Xian-jin Ma,Heng Yang,Jing Yin,Yan Liu,Lang Wu,Shuying Shi,Huiqiang Liu,Xue Ma,Yuxiang Li,Ying Xiong
标识
DOI:10.1016/j.jphotochem.2024.115716
摘要
TiO2/g-C3N4 composites have emerged as the most potent alternative for green photocatalysis, but are plagued by low photoactivity due to poor interfacial bonding. Herein, we report a straightforward mechanical ball milling method to fabricate an amorphous TiO2/g-C3N4 heterojunction. EPR, XPS and XAFS are used to prove that the N atoms of g-C3N4 was successfully doped into the crystal lattice of Am-TiO2 and formed typical Ti···N structure. The obtained 30-AT/CN (30 wt% g-C3N4) composites can form more heterojunction interfacial bonds and extremely improve the separation of charge carriers, showing superior photocatalytic reduction performance of perrhenate (non-radioactive chemical substitute for pertechnetate) and higher photochemical degradation rate of rhodamine B than the bulk counterpart. The material has a progressive Z-scheme heterojunction (S-scheme heterojunction), which increases the transfer ability and prolongs the lifetime of the photogenerated charge carriers. These results suggest a wide range of applications in the preparation method of heterojunction photocatalysts that are potential candidates for environmental remediation.
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