One-Pot Synthesis and Enhanced Vis-NIR Photocatalytic Activity of NiTiO<sub>3</sub>/TiO<sub>2</sub> Templated by Waste Tobacco Stem-Silks
Weidong Yuan,
Xiaohong Chen,
Yi Zhao,
Ying Fang,
Han Zhang,
Daomei Chen,
Jiaqiang Wang
Affiliations
Weidong Yuan
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
Xiaohong Chen
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
Yi Zhao
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
Ying Fang
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
Han Zhang
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
Daomei Chen
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
Jiaqiang Wang
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
Synthesis of the photocatalysts with near-infrared light response usually involves upconversion materials or plasmon-assisted noble metals. Herein, NiTiO3/TiO2 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. NiTiO3(1.0)/TiO2(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 TiO2 prepared without templates and TiO2(TSS) prepared without Ni, respectively. Interestingly, NiTiO3(1.5)/TiO2(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 TiO2 prepared without templates and TiO2(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 NiTiO3 and TiO2 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.
