Heterojunction Cu2O/RGO/BiVO4 ternary nanocomposites with enhanced photocatalytic activities towards degradation of rhodamine B and tetracycline hydrochloride

2019 ◽  
Vol 43 (46) ◽  
pp. 18240-18250 ◽  
Author(s):  
Xiaoying Hu ◽  
Qi Zhang ◽  
Haoshan Nan ◽  
Ming Wang ◽  
Liang Qiao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Tetracycline Hydrochloride ◽  
Photocatalytic Activities

The synergy of BVO, Cu2O and RGO inhibits the recombination of photogenic carriers to enhance the photocatalytic activity.

Preparation of Bi1-xLaxVO4 and its Photocatalytic Degradation on Rhodamine B

2016 ◽  
Vol 852 ◽  
pp. 1473-1476
Author(s):  
Yan Ding ◽  
Liang Fang Fu ◽  
Yu Huan Wang ◽  
Liang Chao Li ◽  
Juan Bi Li
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Light Sensitivity ◽  
Structure Morphology ◽  
Photocatalytic Activities ◽  
Testing Techniques ◽  
Composition Structure

A series of photocatalyst Bi1-xLaxVO4 (0.1, 0.3, 0.5, 0.7) powders were prepared by hydrothermal method. The composition, structure, morphology and photocatalytic activity of the samples were researched by means of modern testing techniques. Bi1-xLaxVO4 showed excellent visible-light sensitivity and photocatalytic activities. The degradation rate of sample with x = 0.5 on rhodamine B reached 90 %, which was much higher than that of pure BiVO4.

Enhanced Photocatalytic Performance of Iodine Doped Bi2WO6 Nanostructures under Visible-Light Irradiation

2013 ◽  
Vol 423-426 ◽  
pp. 163-166 ◽  
Author(s):  
Bao Wei Cao ◽  
Yun Hua Xu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Absorption Spectra ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Red Shift ◽  
Light Irradiation ◽  
Photocatalytic Activities

Bi2WO6 doped with iodine ions were synthesized using hydrothermal method and their photocatalytic activities to degrade Rhodamine B (RhB) under visible-light was investigated. The successful incorporation of I ions in Bi2WO6 was proved by XRD and XPS. UV-vis absorption spectra results show that I ion was successfully doped into Bi2WO6 and a red shift for I-doped Bi2WO6 appeared when compared to pure Bi2WO6. The photocatalytic activities of the photocatalysts were evaluated by the decolorization of RhB under visible-light irradiation. The results showed that the photocatalytic activity of I-doped Bi2WO6 was much higher than the undoped Bi2WO6.

scholarly journals Investigation of ZnTiO3/TiO2 composites and their application in photocatalysis

2019 ◽  
Vol 10 (1) ◽  
pp. 7-11 ◽  
Author(s):  
Zhenzhao Pei ◽  
Pei Wang ◽  
Zhiguo Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Photocatalytic Activity ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Pure Tio2 ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photocatalytic Activities ◽  
Scanning Electron

In this work, we report that ZnTiO3/TiO2 composites, which were synthesized by hydrothermal method possessed photocatalytic and potential spraying properties. The obtained ZnTiO3/TiO2 composites were characterized by scanning electron microscopy (SEM) and X-ray diffraction techniques (XRD). Photocatalytic activities of ZnTiO3/TiO2 composites were evaluated by using Rhodamine B (RhB) as a model pollutant under visible light irradiation. The experimental results showed that the as-prepared ZnTiO3 (2%)/TiO2 composite exhibited better photocatalytic activity than that of pure TiO2.

scholarly journals The Starting Material Concentration Dependence of Ag3PO4 Synthesis for Rhodamine B Photodegradation under Visible Light Irradiation

2020 ◽  
Vol 6 (1) ◽  
pp. 1-9
Author(s):  
Febiyanto Febiyanto ◽  
Uyi Sulaeman
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Visible Region ◽  
Starting Material ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Photocatalytic Activities ◽  
Facet Plane ◽  
Co Precipitation

Synthesis of Ag3PO4 photocatalyst under the varied concentrations of AgNO3 and Na2HPO4·12H2O as starting material has been successfully synthesized using the co-precipitation method. The concentration of AgNO3 is 0.1; 0.5; 1.0; and 2.0 M, whereas Na2HPO4·12H2O is 0.03; 0.17; 0.33; and 0.67 M, respectively. The co-precipitations were carried out under aqueous solution. As-synthesized photocatalysts were examined to degrade Rhodamine B (RhB) under blue light irradiation. The results showed that varying concentrations of starting materials affect the photocatalytic activities, the intensity ratio of [110]/[200] facet plane, and their bandgap energies of Ag3PO4 photocatalyst. The highest photocatalytic activity of the sample was obtained by synthesized using the 1.0 M of AgNO3 and 0.33 M of Na2HPO4·12H2O (AP-1.0). This is due to the high [110] facet plane and increased absorption along the visible region of AP-1.0 photocatalyst. Therefore, this result could be a consideration for the improvement of Ag3PO4 photocatalyst.

scholarly journals Effects of Sintering Temperature on Crystallinity, Morphology, and Photocatalytic Activity of Bi2O3

2019 ◽  
Vol 7 (12) ◽  
Author(s):  
Mukholit, Heri Sutanto ◽  
Ngurah Ayu Ketut Umiati ◽  
Eko Hidayanto
Keyword(s):  
Photocatalytic Activity ◽  
Crystallite Size ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Sintering Temperature ◽  
Photocatalytic Properties ◽  
Precipitation Method ◽  
Temperature Variations ◽  
Photocatalytic Activities ◽  
Degradation Tests

Bi2O3 has successfully been synthesized using precipitation method with sintering temperature variations of 400oC, 450o C, 500o C, 550o C, and 600o C. Crystallinity property of resulting Bi2O3 powder has also been tested with XRD and morphology properties were tested with SEM. Meanwhile, photocatalytic properties were tested by using it to degrade Rhodamine B under sunlight. Results of XRD tests show that differences in sintering temperature affect crystallite size. Increases in sintering temperature between 400o C and 500o C result in greater crystallite size, whereas sintering temperature between 550o C and 600oC result in smaller crystallite size. Results of SEM tests show that resulting Bi2O3 has rod-like structure, While results of degradation tests show that increases in sintering temperature enhances photocatalytic activities of Bi2O3, as evident with Bi2O3 undergoing sintering at 600oC was able to degrade Rhodamine B with 56.74% effectiveness and degradation rate of 0.007 ppm/min.

High Photocatalytic Activity of Covalent Grafting of Phthalocyanines on Crosslinked Electrospun PVA/PAA Nanofibers

2016 ◽  
Vol 848 ◽  
pp. 419-424
Author(s):  
Zhen Jun Chang ◽  
Xiao Hui Jin ◽  
Jing Zeng ◽  
Tian You Song ◽  
Jing Zhang
Keyword(s):  
Electron Microscopy ◽  
Hydrogen Peroxide ◽  
Photocatalytic Activity ◽  
Rhodamine B ◽  
High Photocatalytic Activity ◽  
Esterification Reaction ◽  
Hybrid Nanofibers ◽  
Photocatalytic Application ◽  
Covalent Grafting ◽  
Photocatalytic Activities

Phthalocyanine coated crosslinked electrospun PVA/PAA nanofibers were prepared via electrospinning and esterification reaction. The structure of the as-prepared hybrid nanofibers were characterized by fourier transform infrared spectra, scan electron microscopy and UV–visiable absorption spectroscopy. Their photocatalytic activities were evaluated by the degradation of rhodamine B under visible light, and results showed that it exhibited high activity for degradation of rhodamine B in the presence of hydrogen peroxide. The recycling test was also carried out to prove its reusability in photocatalytic application

Study of Photocatalytic Activities with Copper Hydroxyphosphate

2011 ◽  
Vol 675-677 ◽  
pp. 69-72 ◽  
Author(s):  
Hui Zhang ◽  
Jia Yi Hua ◽  
Xiao Meng Lü ◽  
Su Wen Sun ◽  
Ji Min Xie
Keyword(s):  
Photocatalytic Activity ◽  
Rhodamine B ◽  
Diffuse Reflection ◽  
Raw Materials ◽  
Physical Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cupric Acetate ◽  
Photocatalytic Activities ◽  
Diammonium Hydrogen

Copper hydroxyphosphate,as self-assembled nanoparticles, was synthesized by using a hydrothermal method,with cupric acetate (Cu(CH3COO)2·H2O) and diammonium hydrogen phosphate ((NH4)2HPO4) as raw materials. Physical property of copper hydrophosphate was characterized by X-ray diffraction (XRD), Field-emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), and Ultraviolet obvious diffuse reflection(UV-vis DRS). No surfactants or templates were added in the procedure of preparation. By simply adjusting the pH from 3 to 9, the morphology of copper hydrophosphate varied from microrods to walnutshaped microspheres. Photocatalytic activity of the samples was also investigated. Photo decoloration of Rhodamine B in water under visible light irradiation shows that copper hydrophosphate (pH=7) have the best photocatalytic activity: Photodecoloration activity of 100 mL Rhodamine B (10 mg/L) was 98 % under illumination for 30 min.

Coupling {001} Facets Dominated Anatase TiO2 Nanosheets with CNTs for Efficient Photocatalyst

2013 ◽  
Vol 853 ◽  
pp. 111-115
Author(s):  
Wei Wang ◽  
Ya Ru Ni ◽  
Chun Hua Lu ◽  
Zhong Zi Xu
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Rhodamine B ◽  
Light Absorption ◽  
Separation Efficiency ◽  
Xenon Lamp ◽  
Simple Hydrothermal Method ◽  
Photocatalytic Activities

High-reactive {001} facets dominated anatase TiO2 nanosheets were synthesized successfully by a simple hydrothermal method. CNTs were used to couple with as-prepared TiO2 nanosheets to further improve the photocatalytic activity of TiO2. Photocatalytic activities of the photocatalysts were tested by the degradation of Rhodamine B (RhB) aqueous solution under the xenon lamp irradiation. The results indicate that the introduction of CNTs will improve the photocatalytic activities of TiO2 which can be ascribed to the enhanced light absorption and separation efficiency of photogenerated holes and electrons. There was also an optimal content of CNTs to modify TiO2, and a possible mechanism for this idea was also proposed.

Microwave-Assisted Hydrothermal Synthesis of Ag/BiVO4 Architecture with Enhanced Photocatalytic Activities

2012 ◽  
Vol 490-495 ◽  
pp. 3464-3467 ◽  
Author(s):  
Li Guo ◽  
Dan Jun Wang ◽  
Feng Fu ◽  
Xiao Dan Qiang ◽  
Yuan Yang
Keyword(s):  
Photocatalytic Activity ◽  
Phase Composition ◽  
Hydrothermal Synthesis ◽  
Rhodamine B ◽  
Hydrothermal Process ◽  
Absorption Property ◽  
Microwave Assisted ◽  
Degradation Ratio ◽  
Photocatalytic Activities ◽  
Activity Enhancement

BiVO4 microcrystals were prepared via a microwave-assisted hydrothermal process. Ag loaded BiVO4 photocatalyst was prepared by a photoreduction process. XRD, UV-Vis-DRS and FE-SEM techniques were employed to investigate its’ phase composition, absorption property and morphology. The photocatalytic activity of the as-prepared samples was evaluated by the degradation ratio of Rhodamine B. The result indicated that the as-synthesized BiVO4 are spherical microcrystals built up by square nanoplates. After Ag nanoparticles deposite, the photocatalytic activity of BiVO4 was greatly enhanced. Furthermore, the photoctalytic activity enhancement mechanism was also discussed.

Visible light induced photocatalytic degradation of rhodamine B by magnetic bentonite

2016 ◽  
Vol 73 (10) ◽  
pp. 2345-2352 ◽  
Author(s):  
Wenbing Li ◽  
Dong Wan ◽  
Guanghua Wang ◽  
Lulu Lu ◽  
Xiaobi Wei
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Fe3o4 Nanoparticles ◽  
Organic Dyes ◽  
Reaction Parameters ◽  
Water Contaminants ◽  
Photocatalytic Activities ◽  
Repeated Use

The photocatalytic activity of magnetic bentonite, Fe3O4 nanoparticles decorated Al-pillared bentonite (Fe3O4/Al-B), for the degradation of rhodamine B (RhB) in the presence of H2O2 under visible light (VL) was evaluated. The effects of different reaction parameters such as catalyst dose, dye concentration and externally added H2O2 were also investigated. The magnetic bentonite showed good photocatalytic activity, magnetic separability and stability for repeated use. More than 95% of 40 mg/L RhB was converted within 3 h under VL with a catalyst dose of 0.5 g/L. Suitable mechanisms have been proposed to account for the photocatalytic activities in the presence and absence of H2O2. The efficiency of H2O2 in VL process was much higher than that of the dark process. Results obtained in the current study may be useful to develop a suitable photocatalyst for photocatalytic remediation of different water contaminants including organic dyes.

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