Synthesis of monoclinic clinobisvanite BiVO4 for effective visible-light degradation of antibiotics in water: Photocatalytic performance, reaction kinetics, and mechanism
Chi Thi Ha Nguyen , Kien Trung Nguyen , Bac Quang Nguyen , Chuc Ngoc Pham , Quang Van Ngo , Hoanh Ngoc Dao , Ha Thi Viet Luu , Mai Vu Ngoc Nguyen , Nhiem Ngoc Dao
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引用次数: 0
Abstract
This work attempts to remediate amoxicillin (AMX) as a long-life antibiotic model in aquatic environments using the BiVO4 (BVO) semiconductor photocatalyst. Monoclinic clinobisvanite BVO materials (BVO90, BVO120, BVO150, and BVO180) were prepared by the hydrothermal method at different calcination temperatures (90, 120, 150, and 180 °C). The homogeneous BVO150 particles with a visible-light-response bandgap energy of 2.36 eV showed the highest performance for AMX photodegradation within the as-prepared catalyst. AMX degradation in the solutions containing an initial AMX concentration of ≤10 ppm and a BVO150 dosage of ≥50 mg/L at pH 4 demonstrated a photodegradation efficiency of ≥93 % after 120 min. Moreover, AMX degradation on BVO photocatalysts also followed a pseudo-first-order kinetic model. The evaluation of BVO150 before and after five cycles of AMX photodegradation exhibited good durability and stability of materials. Finally, based on the data obtained from product analyses, a proposed mechanism and degradation pathway were discussed.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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