Abstract

In this study, BiVO₄ samples as visible-light-driven photocatalyst were prepared by the chemical combustion method using citric acid as a fuel and followed calcination at 400–550 °C in ambient air. The as-prepared BiVO₄ samples were indexed to the monoclinic scheelite BiVO₄ phase. The BiVO₄ samples were composed of microparticles controlled by high temperature calcination. The BiVO₄ samples were investigated by measuring the degradation of methylene blue (MB) dye under visible light irradiation. The BiVO₄ sample with 400 °C calcination shows the highest photodegradation rate under visible light irradiation because the specific surface area for visible light absorption capacity and the photogenerated charge carriers of the sample were the highest, and thus the photocatalytic activity of the sample was the highest.

摘要

在这项研究中，BiVO ₄样品作为可见光驱动的光催化剂通过化学燃烧方法制备，使用柠檬酸作为燃料，然后在环境空气中在 400-550°C 下煅烧。所制备的 BiVO ₄样品归入单斜白钨矿 BiVO ₄相。BiVO ₄样品由受高温煅烧控制的微粒组成。通过测量亚甲蓝 (MB) 染料在可见光照射下的降解来研究BiVO ₄样品。BiVO ₄ 400℃煅烧的样品在可见光照射下的光降解率最高，因为样品的可见光吸收比表面积和光生载流子最高，因此样品的光催化活性最高。