Facile synthesis of bimetallic (In,Ga)2(O,S)3 oxy-sulfide nanoflower and its enhanced photocatalytic activity for reduction of Cr(VI)

Misganaw Alemu Zeleke; Dong Hau Kuo; Kedir Ebrahim Ahmed; Noto Susanto Gultom

doi:10.1016/j.jcis.2018.06.092

Facile synthesis of bimetallic (In,Ga)₂(O,S)₃ oxy-sulfide nanoflower and its enhanced photocatalytic activity for reduction of Cr(VI)

Misganaw Alemu Zeleke
, Dong Hau Kuo
, Kedir Ebrahim Ahmed
, Noto Susanto Gultom

National Taiwan University of Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Hexavalent chromium is one of the most chronic and harmful to human beings, animals, and environmental well-being, and hence needs a high attention to detoxify it. For this purpose, bimetallic (In,Ga)₂(O,S)₃ oxy-sulfide nanoflower catalyst with different Ga contents was successfully synthesized at a low temperature of 150 °C via a facile method. It was systematically characterized and the visible light-driven photocatalytic reduction of toxic Cr(VI) was 100% completed at 4 min. The Cr(VI) reduction reaction rate constant was 13.8 fold higher than that of Ga-free In₂(O,S)₃ catalyst. It also showed lower recombination of photogenerated charge carriers, faster interfacial reaction rate, and higher electrical conductivity. The photoexcited electrons and H⁺ ions played crucial roles in the reduction of Cr(VI). The Cr(III) composition was 12.0% of the total atomic composition. The as-synthesized catalyst showed a tremendously fast Cr(VI) reduction activity and hence, it is promising for detoxification of hazardous Cr(VI).

Original language	English
Pages (from-to)	567-578
Number of pages	12
Journal	Journal of Colloid and Interface Science
Volume	530
DOIs	https://doi.org/10.1016/j.jcis.2018.06.092
Publication status	Published - 15 Nov 2018
Externally published	Yes

Keywords

Bimetallic oxy-sulfide
Catalyst oxidation
Cr(VI) reduction
Lattice oxygen
Nanoflower catalyst

Access to Document

10.1016/j.jcis.2018.06.092

Cite this

@article{2b810c2e224941a38611a5df9d3c8ea1,

title = "Facile synthesis of bimetallic (In,Ga)2(O,S)3 oxy-sulfide nanoflower and its enhanced photocatalytic activity for reduction of Cr(VI)",

abstract = "Hexavalent chromium is one of the most chronic and harmful to human beings, animals, and environmental well-being, and hence needs a high attention to detoxify it. For this purpose, bimetallic (In,Ga)2(O,S)3 oxy-sulfide nanoflower catalyst with different Ga contents was successfully synthesized at a low temperature of 150 °C via a facile method. It was systematically characterized and the visible light-driven photocatalytic reduction of toxic Cr(VI) was 100\% completed at 4 min. The Cr(VI) reduction reaction rate constant was 13.8 fold higher than that of Ga-free In2(O,S)3 catalyst. It also showed lower recombination of photogenerated charge carriers, faster interfacial reaction rate, and higher electrical conductivity. The photoexcited electrons and H+ ions played crucial roles in the reduction of Cr(VI). The Cr(III) composition was 12.0\% of the total atomic composition. The as-synthesized catalyst showed a tremendously fast Cr(VI) reduction activity and hence, it is promising for detoxification of hazardous Cr(VI).",

keywords = "Bimetallic oxy-sulfide, Catalyst oxidation, Cr(VI) reduction, Lattice oxygen, Nanoflower catalyst",

author = "Zeleke, \{Misganaw Alemu\} and Kuo, \{Dong Hau\} and Ahmed, \{Kedir Ebrahim\} and Gultom, \{Noto Susanto\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Inc.",

year = "2018",

month = nov,

day = "15",

doi = "10.1016/j.jcis.2018.06.092",

language = "English",

volume = "530",

pages = "567--578",

journal = "Journal of Colloid and Interface Science",

issn = "0021-9797",

}

TY - JOUR

T1 - Facile synthesis of bimetallic (In,Ga)2(O,S)3 oxy-sulfide nanoflower and its enhanced photocatalytic activity for reduction of Cr(VI)

AU - Zeleke, Misganaw Alemu

AU - Kuo, Dong Hau

AU - Ahmed, Kedir Ebrahim

AU - Gultom, Noto Susanto

PY - 2018/11/15

Y1 - 2018/11/15

N2 - Hexavalent chromium is one of the most chronic and harmful to human beings, animals, and environmental well-being, and hence needs a high attention to detoxify it. For this purpose, bimetallic (In,Ga)2(O,S)3 oxy-sulfide nanoflower catalyst with different Ga contents was successfully synthesized at a low temperature of 150 °C via a facile method. It was systematically characterized and the visible light-driven photocatalytic reduction of toxic Cr(VI) was 100% completed at 4 min. The Cr(VI) reduction reaction rate constant was 13.8 fold higher than that of Ga-free In2(O,S)3 catalyst. It also showed lower recombination of photogenerated charge carriers, faster interfacial reaction rate, and higher electrical conductivity. The photoexcited electrons and H+ ions played crucial roles in the reduction of Cr(VI). The Cr(III) composition was 12.0% of the total atomic composition. The as-synthesized catalyst showed a tremendously fast Cr(VI) reduction activity and hence, it is promising for detoxification of hazardous Cr(VI).

AB - Hexavalent chromium is one of the most chronic and harmful to human beings, animals, and environmental well-being, and hence needs a high attention to detoxify it. For this purpose, bimetallic (In,Ga)2(O,S)3 oxy-sulfide nanoflower catalyst with different Ga contents was successfully synthesized at a low temperature of 150 °C via a facile method. It was systematically characterized and the visible light-driven photocatalytic reduction of toxic Cr(VI) was 100% completed at 4 min. The Cr(VI) reduction reaction rate constant was 13.8 fold higher than that of Ga-free In2(O,S)3 catalyst. It also showed lower recombination of photogenerated charge carriers, faster interfacial reaction rate, and higher electrical conductivity. The photoexcited electrons and H+ ions played crucial roles in the reduction of Cr(VI). The Cr(III) composition was 12.0% of the total atomic composition. The as-synthesized catalyst showed a tremendously fast Cr(VI) reduction activity and hence, it is promising for detoxification of hazardous Cr(VI).

KW - Bimetallic oxy-sulfide

KW - Catalyst oxidation

KW - Cr(VI) reduction

KW - Lattice oxygen

KW - Nanoflower catalyst

UR - https://www.scopus.com/pages/publications/85049503993

U2 - 10.1016/j.jcis.2018.06.092

DO - 10.1016/j.jcis.2018.06.092

M3 - Article

C2 - 30005233

AN - SCOPUS:85049503993

SN - 0021-9797

VL - 530

SP - 567

EP - 578

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

Facile synthesis of bimetallic (In,Ga)₂(O,S)₃ oxy-sulfide nanoflower and its enhanced photocatalytic activity for reduction of Cr(VI)

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this