Boron-doped black titanium dioxide for visible-light and sacrificial-agent-free photocatalytic nitrate reduction
发布时间：2026-03-30
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- DOI码：
- 10.1016/j.jcis.2026.140374
- 发表刊物：
- Journal of Colloid And Interface Science
- 摘要：
- The photocatalytic reduction of nitrate (NO3− ) to ammonia (NH3) represents a promising green route for sustainable chemical synthesis. However, the widespread reliance on organic sacrificial agents to achieve high yields remains a major limitation. Herein, we report an amorphous boron-doped titanium dioxide (B-TiO2) photocatalyst that enables efficient NO3− -to-NH3 conversion in pure aqueous solution under visible light, without sacrificial agents. The key to this performance lies in the boron doping, which effectively modifies the electronic band structure of TiO2 and extends its optical absorption from the ultraviolet into the visible region, thereby significantly enhancing light utilization. The optimized B-TiO2 material exhibits excellent stability over multiple cycles and achieves a high NH3 production rate of 769 μmol gcat− 1 h− 1. Notably, the yield of nitrite (NO2− ), the most common by-product, is suppressed to only 4% of the NH3 yield, demonstrating superior selectivity that compares favorably with reported systems
- 是否译文：
- 否
- 发表时间：
- 2026-03-29