☆ 4.6 Article

Nano flake Ag3PO4 enhanced photocatalytic activity of bisphenol A under visible light irradiation

COLLOID AND INTERFACE SCIENCE COMMUNICATIONS (2020)

Journal

COLLOID AND INTERFACE SCIENCE COMMUNICATIONS

Volume 37, Issue -, Pages -

Publisher

ELSEVIER

DOI: 10.1016/j.colcom.2020.100277

Keywords

Flake Ag3PO4; Visible light; Photocatalysis; Bisphenol A

Funding

National Natural Science Foundation of China [51678511]
Key Research and Development of Hunan Province of China [2018SK2014]
Excellent Youth Project of Hunan Education Department of China [18B078]
Major Talent Training Program of the Xiangtan University [16PYZ09]

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Abstract

Bisphenol A (BPA) persistently exist in environment, bioaccumulative and toxic to wild life. The nano flake Ag3PO4 photocatalyst and its photocatalytic performance on BPA under visible light irradiation was in-vestigated. The degradation rate constant of BPA by the nano flake Ag3PO4-2 was 9.71 times of that by the cube Ag3PO4. The radical of h+ and center dot O-2(-) principally contributed in the BPA degradation. The powder XRD and TEM showed that the nano flake Ag3PO4-2 exposed (111) crystal surface, and displayed a flake structure with a length of about of 4-6 mu m and wide of 0.05-0.1 mu m. In addition, the band gap energy was 2.39 eV. The Photoluminescence (PL) intensity of the nano flake Ag3PO4-2 was lower than the cube Ag3PO4. The high photocatalyst activity might be attributed to extended light absorption and obviously accelerated carrier transfer, which are accounted by the increasing (111) crystal number and catalytic active sites.

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NiSe2/Ag3PO4 Nanocomposites for Enhanced Visible Light Photocatalysts for Environmental Remediation Applications

Madeeha Rani, Maida Murtaza, Aneeqa Amjad, Manzar Zahra, Amir Waseem, Aiyeshah Alhodaib

Summary: This study examined the use of NiSe2/Ag3PO4 nanocomposite catalysts for photocatalytic degradation of RhB and BPA pollutants. The 20% NiSe2/Ag3PO4 composite exhibited the highest photocatalytic efficiency for both pollutants. Various factors, including dye concentration, catalyst amount, pH, and reaction time, were investigated. The study found that the 20% NiSe2/Ag3PO4 catalyst effectively degraded 10 ppm RhB in 20 min and 20 ppm BPA in 30 min. SEM, PXRD, and energy-dispersive X-ray spectroscopy were used to analyze the physical properties of the samples. The combination of NiSe2 and Ag3PO4 played a crucial role in enhancing the stability of the photocatalysts. The photodegradation of both RhB and BPA followed pseudo-first-order kinetic models with specific rate constants. A Z-scheme reaction mechanism involving superoxide anion radicals and holes was proposed to explain the photodegradation process.

CATALYSTS (2023)