scholarly journals Fabrication and Characterization of a Novel Composite Magnetic Photocatalyst β-Bi2O3/BiVO4/MnxZn1−xFe2O4 for Rhodamine B Degradation under Visible Light

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 797 ◽  
Author(s):  
Yong Cheng ◽  
Yahan Yang ◽  
Zao Jiang ◽  
Longjun Xu ◽  
Chenglun Liu
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
Vital Role ◽  
Pollutant Degradation ◽  
Magnetic Photocatalyst ◽  
Decomposition Experiments ◽  
Calcination Method ◽  
Degradation Effect ◽  
Photo Decomposition

β-Bi2O3/BiVO4/MnxZn1−xFe2O4 (BV/MZF) composite magnetic photocatalyst was first synthesized using the hydrothermal and calcination method. BV/MZF was a mesoporous material with most probable pore size and specific surface area of 18 nm and 17.84 m2/g, respectively. Due to its high saturation magnetization (2.67 emu/g), the BV/MZF composite can be easily separated and recovered from solution under an external magnetic field. The results of photo-decomposition experiments show that the decomposition rate of Rhodamine B (RhB) by BV/MZF can reach 92.6% in 3 h under visible light. After three cycles, BV/MZF can still maintain structural stability and excellent pollutant degradation effect. In addition, analysis of the photocatalytic mechanism of BV/MZF for RhB shows that the p-n heterojunction formed in BV/MZF plays a vital role in its photocatalytic performance. This work has potential application in the future for solving environmental pollution.

scholarly journals Synthesis and characterization of Z-scheme heterostructure CoWO4/g-C3N4 as a visible-light photocatalyst for removal of organic pollutant

2021 ◽  
Vol 10 (2) ◽  
pp. 59-63
Author(s):  
Hai Pham Viet ◽  
Anh Dao Thi Ngoc ◽  
Viet Nguyen Minh ◽  
Ha Tran Thi Viet ◽  
Dang Do Van ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
High Performance ◽  
Organic Pollutant ◽  
Photogenerated Electron ◽  
Morphological Properties ◽  
Electron Hole ◽  
Visible Light Photocatalyst ◽  
Photocatalytic Activities

In this study, direct Z–scheme heterostructure CoWO4/g-C3N4 was synthesized by a facile hydrothermal method. The structural, morphological properties of the prepared samples were characterised by XRD, SEM, UV–Vis and PL measurements. The as-obtained heterostructure CoWO4/g-C3N4 exhibited enhanced photocatalytic activities toward the degradation of Rhodamine B under visible light irradiation with 92% Rhodamine B removal after 80 minutes irritation, which exceeded pristine g-C3N4 and CoWO4. The enhanced photocatalytic performance ascribed to interfacial contact between g-C3N4 and CoWO4, thus further inhibiting the recombination of photogenerated electron/hole pairs. It is anticipated that the construction of Z–scheme heterostructure CoWO4/g-C3N4 is an effective strategy to develop high-performance photocatalysts for the degradation of organic pollutants in water.

Preparation and characterization of composite magnetic photocatalyst MnxZn1−xFe2O4/β-Bi2O3

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79997-80004 ◽  
Author(s):  
Zhaodi Zhang ◽  
Longjun Xu ◽  
Chenglun Liu
Keyword(s):  
Zinc Ferrite ◽  
Magnetic Photocatalyst ◽  
Manganese Zinc ◽  
Manganese Zinc Ferrite ◽  
Magnetic Substrate ◽  
Calcination Method

Composite magnetic photocatalyst MnxZn1−xFe2O4/β-Bi2O3 was synthesized by a dip-calcination method using manganese zinc ferrite as a magnetic substrate.

Synthesis and Characterization of WO3and#183;0.33H2O/Ag2MoO4 Composites as a Visible-Light-Driven Photocatalyst for Rhodamine B and Levofloxacin Degradation

2020 ◽  
Vol 42 (6) ◽  
pp. 827-827
Author(s):  
Yun Xuan Fu Yun Xuan Fu ◽  
Yan Li Yan Li ◽  
Tian Long Chang Tian Long Chang ◽  
Xu Tao Liu Xu Tao Liu ◽  
Xiang Feng Wu Xiang Feng Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Organic Dyes ◽  
Degradation Process ◽  
Molar Ratio ◽  
Leading Role ◽  
Visible Light Driven

Visible-light-driven WO3and#183;0.33H2O/Ag2MoO4 composites have been prepared by using an in-situ growth of Ag2MoO4 nanoparticles on the surfaces of WO3and#183;0.33H2O. The photocatalytic activities of the samples were studied by degradation of rhodamine B and levofloxacin dilute solution. The synergistic photocatalytic mechanism was also analyzed. Experimental results reveal that the as-developed hybrids have higher photocatalytic activity than pure samples. When the theoretical molar ratio of WO3and#183;0.33H2O to Na2MoO4and#183;2H2O is 1:0.15, the as-developed hybrids have the highest photocatalytic degradation efficiency of 99.0% for rhodamine B in 45 min and 40.9% for levofloxacin in 120 min. Furthermore, there are chemical bonds between WO3and#183;0.33H2O and Ag2MoO4. In addition, the super oxide radicals play the leading role during the photocatalytic degradation process of the samples. This work will provide reference for treatment of organic dyes and antibiotics pollution in water with using solar energy.

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