Carbon Nano-Onions (CNOs)/TiO2 Composite Preparation and Its Photocatalytic Performance under Visible Light Irradiation

被引:13
|
作者
Zhang, Yanrong [1 ]
Zhang, Weike [1 ]
Yang, Kai [2 ]
Yang, Yanqing [1 ]
Jia, Jia [1 ]
Liang, Ying [1 ]
Guo, Lijun [1 ]
机构
[1] Taiyuan Univ Technol, Sch Environm Sci & Engn, 79 West Yingze St, Taiyuan 030024, Peoples R China
[2] Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, 5 Yiheyuan Rd, Beijing 100871, Peoples R China
关键词
Titanium dioxide; Carbon nano-onions; Photodegradation; Magnetic recoverable photocatalysts; Organic pollutant; RHODAMINE-B; EFFICIENT REMOVAL; DEGRADATION; TIO2; WATER; NANOTUBES; TITANIA; PHASE; PHOTODEGRADATION; NANOSTRUCTURES;
D O I
10.1061/(ASCE)EE.1943-7870.0001662
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Carbon nano-onions/titanium dioxide (CNOs/TiO2) photocatalyst was synthesized by a simple sol-gel method and characterized by the methods of X-ray diffraction (XRD), scanning electronic microscope (SEM), X-ray photoelectron spectroscopy (XPS), specific surface area (BET method), Fourier transform infrared (FTIR), thermogravimetric analysis (TG), differential scanning calorimeter (DSC), UV-Vis diffuse reflectance spectra (UV-Vis DRS), and high-performance liquid chromatography (HPLC). The photocatalytic activity of CNOs/TiO2 photocatalyst was assessed by testing the degradation rate of Rhodamine B (RhB) under visible light irradiation. The results showed that the optimum photocatalytic activity was achieved when the mass ratio of CNOs to TiO2 was 10%. The aforementioned specific CNOs/TiO2 photocatalyst resulted in a maximum RhB degradation efficiency of 78% (10 mg/L of RhB in 220 min). CNOs enhance the photocatalytic efficiency of TiO2 and improve the separation quantity of CNOs/TiO2 catalyst from aqueous media. CNOs can be used as a modification agent to develop high-performance photocatalysts for the removal of organic pollutants. (c) 2020 American Society of Civil Engineers.
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页数:12
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