Yuan Weidong, Chen Xiaohong, Zhao Yi, Fang Ying, Zhang Han, Chen Daomei, Wang Jiaqiang
School of Chemical Sciences & Technology, School of Materials and Energy, Yunnan Provincial Center of Technology Innovation for New Materials and Equipment in Water Pollution Control, Institute of International Rivers and Eco-Security, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming 650091, China.
Nanomaterials (Basel). 2025 Jan 7;15(2):80. doi: 10.3390/nano15020080.
Synthesis of the photocatalysts with near-infrared light response usually involves upconversion materials or plasmon-assisted noble metals. Herein, NiTiO/TiO was synthesized by using waste tobacco stem-silks as biotemplates and tetra-tert-butyl orthotitanate and nickel nitrate as precursors in a one-pot procedure. NiTiO(1.0)/TiO(TSS) with a mass percent of Ni 1.0% exhibited very high visible-light photocatalytic efficiency in photodegradation of tetracycline hydrochloride (TC), which is 8.0 and 2.3 times higher than TiO prepared without templates and TiO(TSS) prepared without Ni, respectively. Interestingly, NiTiO(1.5)/TiO(TSS) even exhibited good activity under NIR light (λ = 840~850 nm) without upconversion materials or plasmon-assisted noble metals, which is 2.8 and 2.2 times than TiO prepared without templates and TiO(TSS), respectively. The boosting photocatalytic activity has been shown to be attributed to efficient charge separation and transfer across a direct Z-scheme heterojunction between NiTiO and TiO and enhanced light-harvesting ability of special flaky structure reduplicated from tobacco stem-silks. This reported strategy provides a new idea for the multifunctional utilization of waste tobacco stem-silks and the synthesis of novel photocatalysts for the potential application in wastewater treatment.
具有近红外光响应的光催化剂的合成通常涉及上转换材料或等离子体辅助贵金属。在此，以废弃烟梗丝为生物模板，钛酸四丁酯和硝酸镍为前驱体，通过一锅法合成了NiTiO/TiO。质量百分比为1.0%的NiTiO(1.0)/TiO(TSS)在光催化降解盐酸四环素(TC)方面表现出非常高的可见光光催化效率，分别比无模板制备的TiO和无Ni制备的TiO(TSS)高8.0倍和2.3倍。有趣的是，NiTiO(1.5)/TiO(TSS)在没有上转换材料或等离子体辅助贵金属的情况下，在近红外光(λ = 840~850 nm)下甚至表现出良好的活性，分别是无模板制备的TiO和TiO(TSS)的2.8倍和2.2倍。光催化活性的提高归因于NiTiO和TiO之间通过直接Z型异质结实现的有效电荷分离和转移，以及从烟梗丝复制而来的特殊片状结构增强的光捕获能力。该报道策略为废弃烟梗丝的多功能利用以及合成用于废水处理潜在应用的新型光催化剂提供了新思路。
