Synthesis and visible-light photocatalytic degradation of Ag3PO4/AgBr/hydroxyapatite ternary nanocomposites prepared from oyster shells

Sha Sha; Lei Zhang; Haijun Liu; Jingdi Chen; Yuju Che; Fanbing Zhang; Cui Song

doi:10.1039/d1ra01007g

Synthesis and visible-light photocatalytic degradation of Ag₃PO₄/AgBr/hydroxyapatite ternary nanocomposites prepared from oyster shells

RSC Adv. 2021 Apr 26;11(26):15598-15607. doi: 10.1039/d1ra01007g.

Authors

Sha Sha¹, Lei Zhang¹, Haijun Liu², Jingdi Chen¹, Yuju Che¹, Fanbing Zhang¹, Cui Song^{1

2}

Affiliations

¹ Marine College, Shandong University Weihai 264209 China songcui@sdu.edu.cn.
² Rushan Huaxin Foodstuffs Co.,Ltd Weihai 264509 China.

Abstract

In this paper, a new type of Ag₃PO₄/AgBr/hydroxyapatite (HAP) composite was successfully prepared from oyster shells and silver nitrate by a hydrothermal method. The samples were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, electron spin resonance and other precision instruments, and their catalytic activity was characterized by visible light degradation of methylene blue (MB). The experimental results show that the Ag₃PO₄/AgBr/HAP photocatalyst has a nanoscale rod-like structure and excellent photodegradation performance. Although the content of Ag₃PO₄ or AgBr had a significant effect on the reaction activity, the effects did not all positively correlate, and only the appropriate ratio could produce an improved catalytic effect. The catalytic performance of the 1:1-Ag₃PO₄/AgBr/HAP composite was the best: complete degradation of MB was achieved within 40 min, and the reaction rate was 15 times that of Ag₃PO₄/AgBr. In the process of photocatalytic degradation, ˙O^2- and h⁺ are the main active species involved in the reaction, and the synergistic catalysis of Ag₃PO₄, AgBr and HAP promotes the degradation rate.