Synthesis, structure and high photocatalytic performance of a novel vanadium(V) complex based on pyridine-2,4,6-tricarboxylic acid

Abstract

The reaction of V₂O₅ with mixed ligands in water leaded to the formation of complex [(VO₃)₂·(HL^2-)₂·(HL₁)₂] (1) (H₃L = pyridine-2,4,6-tricarboxylic acid; HL₁=isonicotinic acid). This complex is characterized by SEM, X-ray single-crystal diffraction, TGA and UV-Visible diffuse reflectance spectroscopy (UV-Vis DRS). The results show that 1 belongs to the triclinic system, P-1 space group, with a = 8.5626(10) Å, b = 9.8337(12) Å, c = 10.7188(12) Å, α = 93.8250(10)°; β = 112.3410(10)°; γ = 109.8270(10)°, V = 765.20(16) ų, Mr = 832.34. Its band gap is 2.8 ev, surface area is 35.6 m²/g, and it can be stable within 200 °C. The photocatalytic degradation rate of methylene blue (MB) is 0.041 mg/L·min, which is 1.6 times of P₂₅.

Keywords:

• Complex
• pyridine-2,4,6-tricarboxylic acid
• structure
• photocatalytic
• methylene blue

Additional information

Funding

This work was supported by the program for education department of Guangxi province (No: YB2014331); The Basic Research of Guangxi Education Department (No. 200807MS090); Guangxi colleges and universities key laboratory of utilization of microbial and botanical resources, Hechi University (2017HL004), and Master's degree awarded to the project construction fund, Hechi University (2017HJA004).