Synthesis of h-MoO3 nanorods and h-/α-MoO3 composites and their photocatalytic performance

被引：0

作者：

Wang, Lu ^{[1
]}

Li, Hong-xiao ^{[2
]}

Xue, Zheng-liang ^{[1
,2
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[2] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Ferrous Met & Resources Utilizat, Wuhan 430081, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2023年 / 33卷 / 07期

基金：

中国国家自然科学基金;

关键词：

h-MoO3; alpha-MoO3; hydrothermal synthesis; photocatalytic performance; methylene blue;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A facile hydrothermal route for the synthesis of h-MoO3 nanorods and h-/alpha-MoO3 composites was proposed. XRD, TG-DSC, FESEM-EDX, TEM, FT-IR, Raman, photoluminescence (PL) and UV-vis DRS spectroscopy were used to characterize the as-synthesized products. h-MoO3 was formed when the liquid/solid ratio of the raw materials was 2:1 and 5:1. However, homogeneous h-/alpha-MoO3 composites were obtained when the liquid/solid ratio was increased to 8:1 and 12:1. A possible mechanism by which h-MoO3 is formed, and its transformation into alpha-MoO3 were investigated. h-MoO3 annealing was found to comprise three mass-loss stages; i.e., the removal of each of the following: physically adsorbed water, residual ammonium, and coordinated water. Both h-MoO3 nanorods and h-/alpha-MoO3 composites demonstrated excellent visible-light-driven photocatalytic performance with regard to methylene blue degradation. The superior degradation efficiency of the h-/alpha-MoO3 composites was ascribed to a lower recombination rate of electron-hole pairs, a reduced band gap energy, and an enhanced synergistic effect.

引用

页数：13