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Preparation of graphdiyne-doped TiO2/SiO2 composite for enhanced photocatalytic activity

Enhancing the efficiency of visible light degradation is important for the actual application of TiO 2 /SiO 2 (Ti/Si) composite materials for waste water treatment. In this manuscript, graphdiyne-doped TiO 2 /SiO 2 (Ti/Si/GDY) (the Ti/Si composite exhibits a spherical shape with a diameter between 2...

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Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2020-12, Vol.22 (12), Article 365
Main Authors: Yu, Xiang, Jiajun, Liu, Xianglin, Yu, Feng, Zhu, Yongjun, Li, Junbo, Li
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description Enhancing the efficiency of visible light degradation is important for the actual application of TiO 2 /SiO 2 (Ti/Si) composite materials for waste water treatment. In this manuscript, graphdiyne-doped TiO 2 /SiO 2 (Ti/Si/GDY) (the Ti/Si composite exhibits a spherical shape with a diameter between 200 and 500 nm) composite material was successfully prepared using a hydrothermal method, which was utilized as photocatalyst for the photocatalytic degradation of methylene blue (MB) in aqueous solution under visible light illumination. Studies showed that Ti/Si/GDY-0.8 wt% exhibited superior photocatalytic degradation efficiency (91.8%) under visible light illumination than other composite materials such as Ti/Si/GDY-0.6 wt% (87.9%), Ti/Si/GDY-1.0 wt% (85.9%), and bare Ti/Si composite (32.3%). Moreover, Ti/Si/GDY also showed a higher photocatalytic degradation efficiency than other carbon materials (graphene (GR) and carbon nanotube (CNT) composited Ti/Si (Ti/Si/GR, Ti/Si/CNT)). The studies of the possible mechanism for the degradation of MA indicated that h + was the major substance for the smooth degradation of methylene blue. Such a high efficiency photocatalyst might be also useful for the degradation of other contaminates in waste water or air.
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1572-896X
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subjects Aqueous solutions
Carbon nanotubes
Catalytic activity
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composite materials
Degradation
Efficiency
Graphene
Illumination
Inorganic Chemistry
Lasers
Light
Materials Science
Methylene blue
Nanoparticles
Nanotechnology
Optical Devices
Optics
Photocatalysis
Photocatalysts
Photodegradation
Photonics
Physical Chemistry
Research Paper
Silicon dioxide
Titanium dioxide
Wastewater
Wastewater treatment
Water treatment
title Preparation of graphdiyne-doped TiO2/SiO2 composite for enhanced photocatalytic activity
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