Synthesis of Co doped BiVO 4 with enhanced visible-light photocatalytic activities

Co2+ substituted for Bi3+ in BiVO4 and its enhanced photocatalytic activity under visible LED light irradiation

“…This result indicated that the presence of Co with x ¼ 0.05-0.2 caused no signicant change in the crystal phase of BiVO 4 , which was consistent with previous studies. [33][34][35] However, when further increasing the Co molar ratio to 0. 37 In addition, there was no peak indexed to the cobalt oxide or cobalt hydroxide for all Co-doped BiVO 4 samples, suggesting the possible doping of the cobalt ions into the lattice of BiVO 4 instead of loading to the BiVO 4 surface as hydroxide or oxide crystal grains.…”

Size controllable synthesis of cobalt vanadate nanostructures with enhanced photocatalytic activity for the degradation of organic dyes

“…However, wide band gap (3.2 eV) of TiO 2 caused researchers to reduce band gap of photocatalyst material which exposed to visible light for destruction of organic dyes. A series of compounds with low band gap are vanadates such as BiVO 4 [4,5], FeVO 4 [6,7], AgVO 3 [8,9], Ag 3 VO 4 [10,11], Cu 3 V 3 O 8 [12,13] and Zn 3 V 2 O 8 [14,15]. Cobalt vanadate, as one of the most important family of vanadate materials, have suitable band gap for the destruction of pollutants.…”

Catalytic Activity of BiVO4-graphene Nanocomposites for the Reduction of Nitrophenols and the Photocatalytic Degradation of Organic Dyes

“…As a result, the organic dyes were degraded into carbon dioxide (CO 2 ) and H 2 O by hydroxyl radicals (OH • ) and superoxide anion radicals (O 2 −• ), which resulted in the color change of the aqueous solution. 41 The Langmuir-Hinshelwood model was used to investigate the kinetics of photocatalytic degradation; the equation is as follows:…”