ABSTRACT

Titanium dioxide (TiO₂), which is a white material, is one of the most practical and prevalent photocatalysts, since it is abundant, chemically stable, nontoxic, and cost-effective. However, white TiO₂ absorbs only UV light due to its large band gap, which extremely limits its further development. This has stimulated intensive efforts to tune the band gap of TiO₂ for visible-NIR sensitive photocatalysis, creating an emerging material – color TiO₂ as one of the most important milestones for photocatalysts. In this review, the recent progress in color TiO₂ photocatalysts are discussed with emphasis on strategies of material design and synthesis for visible-NIR light response, including (1) metal-doping, (2) nonmetal-doping, and (3) hydrogen reduction. Applications of color TiO₂ are reviewed for photocatalytic degradation of environmental pollutants, production of hydrogen, and photocatalytic CO₂ reduction. This review will aid understanding of the advances and challenges in the development of promising visible-NIR light responsive photocatalysts.

摘要

二氧化钛 (TiO ₂ ) 是一种白色材料，是最实用和最普遍的光催化剂之一，因为它储量丰富、化学稳定、无毒且具有成本效益。然而，白色TiO ₂由于带隙大，仅吸收紫外光，极大地限制了其进一步发展。这激发了人们为调整 TiO ₂的带隙以进行可见光-NIR 敏感光催化的大量努力，创造了一种新兴材料——彩色 TiO ₂作为光催化剂最重要的里程碑之一。_{在这篇综述中，彩色TiO 2}的最新进展讨论了光催化剂，重点讨论了可见-NIR 光响应的材料设计和合成策略，包括 (1) 金属掺杂、(2) 非金属掺杂和 (3) 氢还原。综述了彩色 TiO ₂在光催化降解环境污染物、制氢和光催化 CO ₂还原方面的应用。这篇综述将有助于理解在开发有前途的可见-NIR 光响应光催化剂方面的进展和挑战。