Synthesis, Characterization, and Photocatalytic Activities of BiVO₄ by Carbon Adsorption Hydrothermal Method

Abstract

A new idea of prepared method for BiVO4 nano‐powders hydrothermal synthesis process was developed to avert the existent shortcomings of hydrothermal method. The thermal stability, phase structure, light absorption property, and morphology of the catalyst prepared were characterized by thermogravimetric analyzer (TG), X‐ray diffraction (XRD), ultraviolet visible spectrophotometer (UV/Vis), and transmission electron microscopy (TEM), respectively. Using methyl orange (MO) as the target degradation material and a 500‐W dysprosium lamp as the visible light source to investigate photocatalytic performance of BiVO4. We successfully prepared BiVO4 powders with small particle size, less agglomeration and uniform distribution by carbon adsorption hydrothermal method, and the absorption wavelength of light was red‐shifted, these all rendered the absorption capacity of visible light region enhancing with 94 % high photocatalytic degradation rate of methyl orange at 60 min. And the possible mechanism was also discussed in this study.

Synthesis and photocatalytic activity of a lanthanum doped CoFe2O4/TiO2 nanocomposite for photodegradation of methylene blue organic dye

“…However, because of the rapid recombination of electronhole pairs, and no visible light absorption, the optical and electrical efficiencies of pure TiO 2 are quite limited. [21][22][23][24][25][26][27][28][29] The photocatalytic potential of TiO 2 can be improved by doping with metals or non-metals, or by combining TiO 2 with other narrow-bandgap semiconductors to enhance photon absorption of TiO 2 in the visible light reg ion. [2][3][4]12,[22][23][24]26,27,29 Cobalt ferrite is a magnetic semiconductor material that has some unique properties such as a narrow optical bandgap, nontoxicity and a low cost.…”

Preparation, characterization and photocatalytic performance of K8[Fe(H2O)W11MnO39]/PANI/TiO2 ternary composite

“…However, as a kind of homogeneous catalyst, POMs have a low specific surface area and are difficult to separate and recover. So, it is very important to choose a suitable carrier to load POMs; the other is semiconductor photocatalyst, such as TiO 2 , which has many characteristics of non‐toxic and harmlessness, high catalytic activity, low cost and stable properties [11–14] . However, the band gap of TiO 2 is relatively wide (Eg=3.2 eV), resulting in lower utilization rate of solar energy, that limits its application scope as a photocatalyst.…”