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Hybrid high‐porosity rice straw infused with Bi VO 4 nanoparticles for efficient 2‐chlorophenol degradation
Author(s) -
Channei Duangdao,
Nakaruk Auppatham,
Khanitchaidecha Wilawan,
Jannoey Panatda,
Phanichphant Sukon
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13160
Subject(s) - materials science , adsorption , photocatalysis , straw , monoclinic crystal system , composite material , nanoparticle , porosity , aqueous solution , specific surface area , band gap , chemical engineering , crystal structure , nuclear chemistry , nanotechnology , catalysis , crystallography , organic chemistry , inorganic chemistry , chemistry , optoelectronics , engineering
In this work, the coupling of Bi VO 4 nanoparticles with a highly porous material derived from rice straw (Bi VO 4 / RS composites) and the photocatalytic degradation of 2‐chlorophenol (2‐ CP ) in an aqueous solution was studied. The results indicated that Bi VO 4 / RS composites possessed a monoclinic structure. The morphologies of Bi VO 4 / RS composites consisted of spherical shapes of Bi VO 4 particles coated on the RS adsorbent. The specific surface area of Bi VO 4 increased from 1.9024 to 31.1153 m 2 /g after coating with RS adsorbent. A shift occurred in adsorption edge from 510 to 525 nm, corresponding to a reduction in band gap energy from 2.43 to 2.35 eV . The change in the optical adsorption edge and band gap of Bi VO 4 / RS composites may simultaneously result to the duplication of a structure caused by silicon species in rice straw, which was expected to be self‐doped into the Bi VO 4 crystal lattice during synthesis. The photocatalytic performance of 2‐chlorophenol under visible irradiation clearly showed that Bi VO 4 / RS composites displayed the highest photocatalytic activities in comparison with other pure samples, which were 2 times higher than that of Bi VO 4 .