Novel p-n heterojunction photocatalyst constructed by porous graphite-like C3N4 and nanostructured BiOI: facile synthesis and enhanced photocatalytic activity

作者：Jiang, Deli; Chen, Linlin; Zhu, Jianjun; Chen, Min; Shi, Weidong; Xie, Jimin^*

来源：Dalton Transactions, 2013, 42(44): 15726-15734.

DOI：10.1039/c3dt52008k

• LOW-TEMPERATURE SYNTHESIS
• CARBON NITRIDE
• HYDROGEN EVOLUTION
• G-C3N4
• EFFICIENT
• DEGRADATION
• CATALYSIS
• HYBRID
• SEMICONDUCTORS
• NANOCOMPOSITE

In this work, n-type porous graphite-like C3N4 (denoted as p-g-C3N4) was fabricated and modified with p-type nanostructured BiOI to form a novel BiOI/p-g-C3N4 p-n heterojunction photocatalyst for the efficient photocatalytic degradation of methylene blue (MB). The results show that the BiOI/p-g-C3N4 heterojunction photocatalyst exhibits superior photocatalytic activity compared to pure BiOI and p-g-C3N4. The visible-light photocatalytic activity enhancement of BiOI/p-g-C3N4 heterostructures could be attributed to its strong absorption in the visible region and low recombination rate of the electron-hole pairs because of the heterojunction formed between BiOI and p-g-C3N4. It was also found that the photodegradation of MB molecules is mainly attributed to the oxidation action of the generated O2(center dot-)-radicals and partly to the action of h(vb)(+) via direct hole oxidation process.

• 出版日期2013
• 单位江苏大学