An in situ annealing route to [Bi6O6(OH)2](NO3)4·2H2O/g-C3N4 heterojunction and its visible-light-driven photocatalytic performance
作者： Yuanyuan Ma , Qiaofeng Han , Xin Wang , Junwu Zhu
DOI: 10.1016/J.MATERRESBULL.2018.01.046
关键词:
摘要: Abstract Known as incomplete hydrolysis products of Bi(NO3)3·5H2O, basic bismuth nitrates (BBN), were commonly obtained via a solution route. Herein, BBN-CN ([Bi6O6(OH)2](NO3)4·2H2O/g-C3N4) and Bi2O3-g-C3N4 heterojunctions prepared in situ by mixing g-C3N4 with baked Bi(NO3)3·5H2O subsequent calcining at 250 °C 550 °C, respectively. The source was crucial to the formation highly crystalline BBN, otherwise, product poor-crystalline low photoactive. as-prepared exhibited better photocatalytic activity for rhodamine B (RhB) degradation under visible light irradiation than g-C3N4, Bi2O3-g-C3N4, although Bi2O3 is more visible-light-active. These could be attributed higher surface areas negative conduction band potentials which benefits capturing photogenerated electrons form active O2− radicals. Furthermore, presence plays role enlarging response.
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