Preparation and Photocatalytic Performance Study of Na+/K+-WO3 by Ultrasonic Micro Method

With n-butanol/CTAB/cyclohexane as micro emulsion system, sodium tungstate and hydrochloric acid as raw material, alkali metals (Na+, K+) nitrate as dopant, pure WO3、Na+-WO3, K+-WO3 and Na+/K+-WO3 powders were prepared by ultrasonic micro-emulsion method; And performances of samples were analyzed by visible spectrophotometer. Photocatalytic activity study show that alkali metal sodium ion and potassium ion doped, photocatalytic activities of WO3 are improved markedly; When doping amount is 1.0%, catalyst amount is 2g/L, methyl orange concentration is 20mg/L, degradation time is 80 min, Na+-WO3 powder has the best photocatalytic degradation performance at 460nm, and the degradation rate is as high as 65%.

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Study on Preparation and Photocatalytic Performance of Co-Doped TiO2 with Cu and Ce

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.722 ◽

2011 ◽

Vol 399-401 ◽

pp. 722-726 ◽

Cited By ~ 1

Author(s):

Jiang Ping Zhao ◽

Xiao Ni Yang ◽

Hao Zhang

Keyword(s):

Photocatalytic Performance ◽

Sol Gel ◽

Test Chamber ◽

Raw Material ◽

Nano Particles ◽

Molar Ratio ◽

X Ray ◽

Co Doping ◽

Photocatalytic Activities ◽

Environmental Test

In this paper, Cu-Ce/TiO2nano-particles, whose molar ratio account for 2%,2.5%,3%,3.5% and 4% respectively, were synthesized by sol-gel method, using Ti(C4H9O)4as the raw material, And the photocatalytic activities of the prepared samples were investigated by degrading formaldehyde gas under pure visible light through simulating indoor environment in the environmental test chamber. Moreover, X-Ray Powder Diffraction (XRD) and Ultraviolet-visible spectrophotometer were applied to analyze the crystallite size and optical properties of the samples. It is indicated that the sample of 2.5% performs best in the test. Besides, photocatalytic mechanism of co-doping of Cu-Ce was discussed.

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Preparation and Photocatalytic Performance Study of La-WO3 Co-Doping TiO2

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.936.809 ◽

2014 ◽

Vol 936 ◽

pp. 809-813 ◽

Cited By ~ 1

Author(s):

Xian Zhen Diao ◽

Dong Zhou

Keyword(s):

Methyl Orange ◽

Degradation Rate ◽

Photocatalytic Performance ◽

Sol Gel ◽

Treatment Temperature ◽

Performance Study ◽

Co Doping ◽

Photocatalytic Effect ◽

Infrared Spectrometer ◽

Methyl Orange Concentration

Butyl titanate as titanium source, anhydrous ethanol as solvent, glacial acetic acid as inhibitor, La-WO3/TiO2, La/TiO2, WO3/TiO2and pure TiO2 photocatalysts were prepared through sol-gel method; At the same time, both of which were characterized by infrared spectrometer and uv-vis spectrophotometer; With methyl orange as simulated target degradation material, heat treatment temperature、different dopants, etc. on photocatalytic performance influences of TiO2were studied by spectrophotometer. Experimental results show that doping can improve obviously the photocatalytic activity of TiO2. When calcination temperature is 500 ℃, dosage of catalyst is 0.25 g, pH is 1, and methyl orange concentration is 10 mg/L, La-WO3/TiO2 photocatalytic effect is best, and degradation rate is 46.18%.

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Effects of P Doping Amount on Structure and Photocatalytic Performance of TiO2 for H2 Production from Glycerol Solution

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION) ◽

10.3724/sp.j.1088.2012.20353 ◽

2013 ◽

Vol 33 (8) ◽

pp. 1395-1401

Author(s):

Ye TIAN ◽

Huanxin SANG ◽

Xitao WANG

Keyword(s):

Photocatalytic Performance ◽

Glycerol Solution ◽

Doping Amount

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An Ultrasound Application for TiO2 Photocatalytic Degradation of Methyl Orange

Materials Science ◽

10.5755/j02.ms.21622 ◽

2021 ◽

Author(s):

Xianzhen Diao ◽

Jin XU ◽

Yufei WANG

Keyword(s):

Methyl Orange ◽

Photocatalytic Degradation ◽

Photocatalytic Performance ◽

Sol Gel ◽

Methyl Orange Solution ◽

X Ray Diffraction ◽

Doping Amount ◽

Nickel Doping ◽

Ultrasound Application ◽

Ultrasound Technology

Nanometer TiO2 photocatalysts were prepared by the sol–gel method. The catalysts were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, and other techniques. Methyl orange solution was used for the degradation of the organic material and ultrasonic technology was used to determine the photocatalytic performance of the catalysts. The results show that the photocatalytic performance of the Ni-N-TiO2 is clearly improved under ultrasonic conditions. The TiO2 photocatalytic degradation effect is optimal at a catalyst concentration of 0.3 g/L, an initial concentration of the organic matter of 0.03 mmol/L, a nickel-doping amount of 2 mol %, and a nitrogen-doping amount of 15 mol %. The use of ultrasound technology in combination with photocatalysis has a positive effect and results in a TiO2 degradation rate of methyl orange of 95 % after 3 h.

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Rapid preparation of terbium-doped titanium dioxide nanoparticles and their enhanced photocatalytic performance

Royal Society Open Science ◽

10.1098/rsos.191077 ◽

2019 ◽

Vol 6 (10) ◽

pp. 191077 ◽

Cited By ~ 3

Author(s):

Zhencui Wang ◽

Yuechao Song ◽

Xingfei Cai ◽

Jun Zhang ◽

Tianle Tang ◽

...

Keyword(s):

Titanium Dioxide ◽

Photocatalytic Activity ◽

Photocatalytic Performance ◽

Diffuse Reflectance Spectroscopy ◽

Titanium Dioxide Nanoparticles ◽

Earth Metal ◽

Nitrate Hexahydrate ◽

Doping Amount ◽

X Ray ◽

Low Toxicity

Further applications of photocatalysis were limited by the high recombination probability of photo-induced electron–hole pairs in traditional titanium dioxide nanoparticles (TiO 2 NPs). Herein, we modified them with rare earth metal via a facile sol–gel method, using tetrabutyl titanate as a precursor and terbium (III) nitrate hexahydrate as terbium (Tb) source. The resulting samples with different Tb doping amounts (from 0 to 2%) have been characterized by X-ray diffraction, UV–visible diffuse reflectance spectroscopy, X-ray photo-electron spectroscopy and a scanning electron microscope. The photocatalytic performance of Tb-doped TiO 2 was evaluated by the degradation of methylene blue. The effects of Tb doping amount and initial pH value of solution were investigated in detail. The composite with Tb doping amount of 1.0 wt% showed the highest photocatalytic performance. It exhibited approximately three times enhancement in photocatalytic activity with a reaction rate constant of 0.2314 h −1 when compared with that of commercial P25 (0.0827 h −1 ). In addition, it presented low toxicity on zebrafishes with 96 h-LC 50 of 23.2 mg l −1 , and has been proved to be reusable for at least four cycles without significant loss of photocatalytic activity. A probable photocatalytic mechanism of Tb-doped TiO 2 was proposed according to the active species trapping experiments. The high photocatalytic performance, excellent reusability and low toxicity of Tb-doped TiO 2 indicated that it is a promising candidate material in the future treatment of dye wastewater.

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Facile Solvothermal Synthesis of Hollow BiOBr Submicrospheres with Enhanced Visible-Light-Responsive Photocatalytic Performance

Journal of Analytical Methods in Chemistry ◽

10.1155/2020/3058621 ◽

2020 ◽

Vol 2020 ◽

pp. 1-12

Author(s):

Linrui Hou ◽

Yawei Niu ◽

Fan Yang ◽

Fengyue Ge ◽

Changzhou Yuan

Keyword(s):

Waste Water ◽

Methyl Orange ◽

Water Treatment ◽

Visible Light ◽

Solvothermal Synthesis ◽

Photocatalytic Performance ◽

Waste Water Treatment ◽

Commercial Application ◽

Visible Light Absorption ◽

Photocatalytic Activities

In this work, hierarchical hollow BiOBr submicrospheres (HBSMs) were successfully prepared via a facile yet efficient solvothermal strategy. Remarkable effects of solvents upon the crystallinities, morphologies, and microstructures of the BiOBr products were systematically investigated, which revealed that the glycerol/isopropanol volumetric ratio played a significant role in the formation of hollow architecture. Accordingly, the underlying formation mechanism of the hollow submicrospheres was tentatively put forward here. Furthermore, the photocatalytic activities of the resulting HBSMs were evaluated in detail with photocatalytic degradation of the organic methyl orange under visible light irradiation. Encouragingly, the as-obtained HBSMs with striking recyclability demonstrated excellent visible-light-responsive photocatalytic performance, which benefits from their large surface area, effective visible light absorption, and unique hollow feature, highlighting their promising commercial application in waste water treatment.

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Preparation and Photocatalytic Performance Study of TiO2 Coating on Cenospheres

Asian Journal of Chemistry ◽

10.14233/ajchem.2014.17302 ◽

2014 ◽

Vol 26 (6) ◽

pp. 1615-1618

Author(s):

Yongkang Tang ◽

Yin Liu ◽

Zhiping Gan ◽

Liyun Ma ◽

Jianping Zhu ◽

...

Keyword(s):

Photocatalytic Performance ◽

Tio2 Coating ◽

Performance Study

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Fabrication of 1D Nanometer Tungsten Trioxide under Different Solvent System

Materials Science Forum ◽

10.4028/www.scientific.net/msf.944.1144 ◽

2019 ◽

Vol 944 ◽

pp. 1144-1151

Author(s):

Lin Yan Zhao ◽

Yue Gang Shen ◽

You Shu Fan ◽

Li Wen Ma ◽

Xiao Li Xi

Keyword(s):

Tungsten Trioxide ◽

Dye Sensitized Solar Cells ◽

Chemical Properties ◽

Lithium Ion ◽

Solvent System ◽

Raw Material ◽

Solvent Type ◽

Photocatalytic Activities ◽

Size And Morphology ◽

Physical And Chemical

As a cheap and stable transition metal oxide, tungsten trioxide (WO3) has received extensive attentions due to superior physical and chemical properties that could be used in electronic devices, lithium-ion batteries, gas sensors, dye sensitized solar cells, catalysts. In this study, the well-designed 1D architecture of nanowires and nanorods was successfully synthesized via a simple and facile solvethermal method with no template or additives. It is found that both solvent type and concentration of W raw material can affect the size and morphology of WO3significantly in a regular way. Different products showed distinct photocatalytic activities during the processing of degradation methylene blue under visible light, and the underlying reasons for the different photocatalytic activities were discussed.

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