Visible‐light‐driven Oxygen Vacancy and Carbon Doping of C@TiO_2‐x Photocatalyst for Enhanced Pollutants Degradation Performance

Abstract

Oxygen Vacancy (OVs) and carbon doping of the photocatalyst body will significantly enhance the photocatalytic efficiency. However, synchronous regulation of these two aspects is challenging. In this paper, a novel C@TiO2‐x photocatalyst was designed by coupling the surface defect and doping engineering of titania, which can effectively remove rhodamine B (RhB) and has a relatively high performance with wide pH range, high photocatalytic activity and good stability. Within 90 minutes, the photocatalytic degradation rate of RhB by C@TiO2‐x (94.1 % at 20 mg/L) is 28 times higher than that of pure TiO2. Free radical trapping experiments and electron spin resonance techniques reveal that superoxide radicals (⋅O2−) and photogenerated holes (h+) play key roles in the photocatalytic degradation of RhB. This study demonstrates the possibility of regulating photocatalysts to degrade pollutants in wastewater based on an integrated strategy.

Hydrothermal Synthesis and Photocatalytic Activity of NiTiO3 for the Degradation of Malachite Green under Visible Light Irradiation

“…The ABO3‐type oxides are known for forming a diverse class of materials, thus having an essential role in many device applications, primarily for their various crystal structures. Due to their physicochemical properties (e. g., piezoelectric, dielectric, pyroelectric, and photostrictive), their use case expands from dielectric and photoelectric applications to gas‐sensing and lithium‐ion batteries [1,2] . $${{{\rm \ }{\rm M}{\rm T}{\rm i}{\rm O}}_{3}}$$ ‐type perovskites, where M represents Pb, Ba, Cd, Fe, Zn, Cu, or Mn, are ilmenite structures that have received increasing attention as inorganic compounds.…”