Bismuth sulfide photocatalysis water treatment under visible irradiation

Autor:	Chuanbo Li, Atiya Khalid, Kexin He, Safia Hasan, Xiaoming Zhang, Jaweria Ambreen, Bingxue Liu, Mushtaq Ahmad, S. S. Batool, Naveed Akhtar
Rok vydání:	2021
Předmět:	Materials science 010405 organic chemistry Scanning electron microscope Portable water purification General Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Congo red chemistry.chemical_compound chemistry Specific surface area Photocatalysis Nanorod Water treatment Photodegradation Nuclear chemistry
Zdroj:	Research on Chemical Intermediates. 47:3395-3409
ISSN:	1568-5675 0922-6168
Popis:	Many contaminants in water are not completely removed by conventional water purification techniques. So, the need of fast and efficient technique for water purification is required for efficient removal. Photocatalysis using low bandgap semiconductors is capable of detoxifying contaminated water. Herein, bismuth sulfide (Bi2S3) nanorods were synthesized using a solid-state reaction method and their photocatalytic performance was tested for the removal of Congo red dye from water. X-ray diffraction (XRD) results confirmed the formation of Bi2S3 with a crystallite size of 5.0 nm. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirmed the formation of Bi2S3 nanorods with a diameter of 20–30 nm, length of 100 nm -150 nm and an aspect ratio of 5. Photoluminescence (PL) spectrum revealed the bandgap value of 2.47 eV. The specific surface area calculated using Brunauer–Emmett–Teller (BET) of Bi2S3 nanorods was 94.44 m2/g and pore volume was 0.158 cm3/g. The photodegradation of toxic Congo red was performed using Bi2S3 nanorods under UV irradiation. Photodegradation efficiencies up to 87% for Congo red dye were observed within 90 min. The pseudo-first-order (PFO) kinetic model was best fitted to understand the kinetics of photocatalysis. For Bi2S3 nanorods photocatalysts, the apparent rate constant value was 0.01573/min with a 0.997 correlation coefficient value.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::16f8c5db1e932aaaee266f05ba4fc120 https://doi.org/10.1007/s11164-021-04471-1 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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