BiOCOOH Microflowers Decorated with Ag/Ag2CrO4 Nanoparticles as Highly Efficient Photocatalyst for the Treatment of Toxic Wastewater

Abstract

A novel flower-like Ag/Ag2CrO4/BiOCOOH heterojunction photocatalyst was synthesized by a facile in-situ precipitation strategy combined with photoreduction treatment. Morphological studies revealed that numerous Ag/Ag2CrO4 nanoparticles were evenly anchored on BiOCOOH microflowers, producing a novel heterojunction with the compactly interfacial contact. Optical absorption characterization demonstrated that Ag/Ag2CrO4/BiOCOOH possessed much better sunlight harvesting ability than Ag2CrO4/BiOCOOH and BiOCOOH. Photocatalytic experiments verified that compared with BiOCOOH, Ag2CrO4, Ag/Ag2CrO4, and Ag2CrO4/BiOCOOH, Ag/Ag2CrO4/BiOCOOH achieved remarkable efficiency by eliminating 100% of rhodamine B (RhB), 82.6% of methyl orange (MO) or 69.4% of ciprofloxacin (CIP) within 50 min at a catalyst dosage of 0.4 g/L. The high photocatalytic performance is likely owing to the improved sunlight response and the distinctly suppressed recombination of charge carriers arising from the formation of the novel 3D hierarchical heterostructure. The quenching test signified that h+, and •O2− were detected as the prevailing active species in wastewater treatment. This study may provide a viable strategy for enhancing the photocatalytic performance of wide band-gap semiconductors.

Synthesis of Magnetic Fe3O4/ZnWO4 and Fe3O4/ZnWO4/CeVO4 Nanoparticles: The Photocatalytic Effects on Organic Pollutants upon Irradiation with UV-Vis Light

“…The development of human civilization across the earth in the form of population growth and increasing industrialization has resulted in a shortage of healthy wastewater. Wastewater may contain many pathogenic microorganisms and pharmaceutical and chemical residues [1][2][3][4]. A large variety of organic compounds are capable of being completely degraded and mineralized into CO 2 and harmless inorganic anions.…”

Mechanochemical synthesis of ionic solids based on phosphotungstic acid and triethylamine for photocatalytic dye degradation

“…Apparently, a significant effect is seen with 10.0 mM EBT and 6.0 mg of TTA5, where ∼87% dye was degraded. The degradation efficiency fell when 1 mM benzoquinone was added as a quencher of radicals [45]. Based on these findings, it can be inferred that the ionic solids containing between 60%-80% PTA are more efficient as photocatalysts.…”

Hydrothermal Synthesis and Photocatalytic Properties of Graphene@Ag/AgSb2O5.8 Composites: Reaction Laws of the Composites in Sintering Process

“…In order to efficiently destruct these organic molecules from the aquatic environment, various techniques, including adsorption, electrochemistry, and catalysis have been developed. Among those advanced oxidation processes (AOPs), semiconductor-mediated piezo-photocatalysis [3][4][5] and photocatalysis [6][7][8][9][10][11][12][13][14][15][16][17][18], which possess strong redox potentials to produce high reactive radicals of O 2 and OH . , have been proven to be one of the most reliable technologies in water purification by virtue of their eco-friendly, cost-effective, and high-efficiency characteristics.…”