Fabrication of black phosphorus nanosheets/BiOBr visible light photocatalysts via the co-precipitation method

2021 ◽  
Vol 612 ◽  
pp. 125967
Author(s):  
Shutao Li ◽  
Pengfei Wang ◽  
Haoxu Zhao ◽  
Rendong Wang ◽  
Ruisen Jing ◽  
...  
Keyword(s):  
Visible Light ◽  
Black Phosphorus ◽  
Precipitation Method ◽  
Co Precipitation

scholarly journals Preparation and Properties of Floral CaO/ZnO Nanocomposite From Achatina Fulica Snail Shell

2021 ◽  
Author(s):  
Qiushi Jiang ◽  
Zhaolian Han ◽  
Yafeng Yuan ◽  
Zhiqiang Cheng
Keyword(s):  
Visible Light ◽  
Cost Effective ◽  
Raw Material ◽  
Precipitation Method ◽  
Potential Candidate ◽  
Achatina Fulica ◽  
Vis Spectroscopy ◽  
Sem Study ◽  
Co Precipitation ◽  
Visible Light Degradation

Abstract In this study, CaO prepared by calcination treatment from abandoned Achatina fulica shell was used as a raw material, and the nano-flower-like CaO/ZnO photocatalytic composite material was prepared through co-precipitation method. SEM study showed ZnO with spindle-like petals in the range of 500-1000 nm grown on the surface of CaO carrier. The mapping image shows that the base component of the nanometer flower is mainly CaO, which is because CaO is not only in the reaction as a carrier, but also creates an alkaline environment in the methanol system, which is advantageous for co-precipitation. UV-vis spectroscopy shows that the visible light absorption of composites has red shifts, besides, PL, EIS and photocurrent test showed that the composites have stronger electronic hole separation capabilities. The visible light degradation test of rhodamine B showed that CaO/ZnO photocatalytic composite could degrade 90% of the pollutants in 25 min, superior to CaO and ZnO, exhibiting recyclability properties, which is a potential candidate with cost-effective and sustainable photocatalysts.

scholarly journals Synthesized BiVO4 was by the co-precipitation method for Rhodamine B degradation under visible light

2019 ◽  
Vol 542 ◽  
pp. 012058
Author(s):  
Trinh Duy Nguyen ◽  
Vu Dai Cao ◽  
Vinh Huu Nguyen ◽  
Linh Xuan Nong ◽  
Tuan Duy Luu ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
Precipitation Method ◽  
Co Precipitation

scholarly journals High activity of Ag-doped Cd0.1Zn0.9S photocatalyst prepared by the hydrothermal method for hydrogen production under visible-light irradiation

2014 ◽  
Vol 5 ◽  
pp. 587-595 ◽  
Author(s):  
Leny Yuliati ◽  
Melody Kimi ◽  
Mustaffa Shamsuddin
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Production ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Ag Doping ◽  
Light Region ◽  
Co Precipitation

Background: The hydrothermal method was used as a new approach to prepare a series of Ag-doped Cd0.1Zn0.9S photocatalysts. The effect of Ag doping on the properties and photocatalytic activity of Cd0.1Zn0.9S was studied for the hydrogen production from water reduction under visible light irradiation. Results: Compared to the series prepared by the co-precipitation method, samples prepared by the hydrothermal method performed with a better photocatalytic activity. The sample with the optimum amount of Ag doping showed the highest hydrogen production rate of 3.91 mmol/h, which was 1.7 times higher than that of undoped Cd0.1Zn0.9S. With the Ag doping, a red shift in the optical response was observed, leading to a larger portion of the visible light absorption than that of without doping. In addition to the larger absorption in the visible-light region, the increase in photocatalytic activity of samples with Ag doping may also come from the Ag species facilitating electron–hole separation. Conclusion: This study demonstrated that Ag doping is a promising way to enhance the activity of Cd0.1Zn0.9S photocatalyst.

scholarly journals Photodegradation of naphthalene over Fe 3 O 4 under visible light irradiation

2019 ◽  
Vol 6 (1) ◽  
pp. 181779
Author(s):  
Jiawei Zhang ◽  
Shanshan Fan ◽  
Bin Lu ◽  
Qinghai Cai ◽  
Jingxiang Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Degradation Products ◽  
Magnetic Measurement ◽  
Average Diameter ◽  
Degradation Pathway ◽  
Light Irradiation ◽  
Precipitation Method ◽  
Naoh Solution ◽  
Co Precipitation

Using FeCl 3 and FeSO 4 as precursors, Fe 3 O 4 were prepared by co-precipitation method via FeCl 3 and FeSO 4 aqueous solutions successively added to NaOH solution. The sample was proved by X-ray powder diffraction, transmission electron microscope, ultraviolet–visible spectrophotometry and magnetic measurement. The results showed that the prepared Fe 3 O 4 material was composed of an average diameter of about 15 nm particles and nano rods with well-crystallized magnetite and stronger superparamagnetic, getting a saturation magnetization of 49.5 emu g −1 . This Fe 3 O 4 material was found to be an effective catalyst for photodegradation of naphthalene with or without H 2 O 2 under visible light irradiation, getting 81.1% and 74.3% degradation rate in these two cases, respectively. The degradation pathway in the absence and presence of H 2 O 2 was analysed via measurement of the distribution of degradation products by GC-MS and adsorption of reactants on the surface of the catalyst by in situ DRIFTS spectra.

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