钒氮共掺杂二氧化钛（TiO₂）提高光催化性能：在废水处理中的潜力。

Vanadium and Nitrogen Co-Doped Titanium Dioxide (TiO₂) with Enhanced Photocatalytic Performance: Potential in Wastewater Treatment.

机构信息

Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies (IAS), University of Malaya, 50603 Kuala Lumpur, Malaysia.

出版信息

J Nanosci Nanotechnol. 2020 Feb 1;20(2):741-751. doi: 10.1166/jnn.2020.16946.

DOI:10.1166/jnn.2020.16946

PMID:31383069

Abstract

The vanadium (V) and nitrogen (N) dopants on TiO₂ demonstrated superior photocatalytic performance for the degradation of methylene blue (MB) dye under visible light. The vanadium, V, N-co-doped TiO₂ was synthesized by a modified sol-gel method. It revealed that V and N codoping had a significant effect on the band gap () of TiO₂, where the pristine TiO₂ possessed a wide band gap (3.18 eV) compared to V-doped TiO₂ (2.89 eV) and N-doped TiO₂ (2.87 eV) while the V, N-co-doped TiO₂ depicted the narrowest band gap (2.65 eV). The greatly increased specific surface area for the V, N-co-doped TiO₂ (103.87 m²/g) as compared to P25 TiO₂ (51.68 m²/g) also contributed to the major improvement in the MB dye degradation efficiency (0.055 min). The V, N-co-doped TiO₂ exhibit rapid photocatalytic activity for the degradation of MB with almost 99% of degradation in 120 minutes.

摘要

钒(V)和氮(N)掺杂的 TiO₂ 在可见光下对亚甲基蓝(MB)染料的降解表现出优异的光催化性能。采用改进的溶胶-凝胶法合成了 V、N 共掺杂的 TiO₂。结果表明，V 和 N 共掺杂对 TiO₂ 的带隙()有显著影响，与未掺杂的 TiO₂(3.18 eV)相比，V 掺杂的 TiO₂(2.89 eV)和 N 掺杂的 TiO₂(2.87 eV)的带隙较窄，而 V、N 共掺杂的 TiO₂的带隙最窄(2.65 eV)。与 P25 TiO₂(51.68 m²/g)相比，V、N 共掺杂的 TiO₂的比表面积大大增加(103.87 m²/g)，这也有助于提高 MB 染料的降解效率(0.055 min)。V、N 共掺杂的 TiO₂对 MB 的光催化降解活性迅速，在 120 分钟内几乎达到 99%的降解率。