Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

JieJie  Nan; Sijia  Guo; Dalal  Alhashmialameer; Qingming  He; Yinuo  Meng; Ruixiang  Ge; Salah M.  El-Bahy; Nithesh  Naik; Vignesh Murugadoss; Mina  Huang; Ben Bin Xu; Qian  Shao; Zhanhu Guo

doi:10.1021/acsanm.2c00107

Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

JieJie Nan, Sijia Guo, Dalal Alhashmialameer, Qingming He, Yinuo Meng, Ruixiang Ge, Salah M. El-Bahy, Nithesh Naik, Vignesh Murugadoss, Mina Huang, Ben Bin Xu, Qian Shao, Zhanhu Guo

Mechanical and Construction Engineering Department

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Abstract

Co3O4/In2O3 nanocomposites were prepared via a microwave-hydrothermal method and directly used as photoanodes for the photoelectrocatalytic (PEC) process to reduce Cr(VI). The as-prepared Co3O4/In2O3 composites show a rod-like structure, which is composed of nanoparticles. The PEC experiments indicated that after 120 min of irradiation with 0.7 V bias voltage and visible light, the Cr(VI) reduction efficiency of Co3O4/In2O3 composites in aqueous solution was 100%, which was superior to the samples prepared by other methods. Moreover, the Co3O4/In2O3 composite still had a high catalytic activity after five runs of PEC experiments. Elimination experiments demonstrate that photo-generated electrons (e–) performed a key role in the catalytic reduction of Cr(VI). The significantly improved PEC performance can be attributed to the bias voltage and the p-n heterojunction formed between Co3O4 and In2O3. Therefore, Co3O4/In2O3 nanocomposites have a considerable potential for the PEC reduction of Cr(VI).

Original language	English
Pages (from-to)	8755–8766
Number of pages	12
Journal	ACS Applied Nano Materials
Volume	5
Issue number	7
Early online date	24 Jun 2022
DOIs	https://doi.org/10.1021/acsanm.2c00107
Publication status	Published - 22 Jul 2022

Keywords

PEC
reduction of Cr(VI)
p-n heterojunction
Co3O4/In2O3
microwave-hydrothermal
Co O /In O

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10.1021/acsanm.2c00107

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@article{f8e7b51857374e23b4153bf12fe8ffd1,

title = "Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)",

abstract = "Co3O4/In2O3 nanocomposites were prepared via a microwave-hydrothermal method and directly used as photoanodes for the photoelectrocatalytic (PEC) process to reduce Cr(VI). The as-prepared Co3O4/In2O3 composites show a rod-like structure, which is composed of nanoparticles. The PEC experiments indicated that after 120 min of irradiation with 0.7 V bias voltage and visible light, the Cr(VI) reduction efficiency of Co3O4/In2O3 composites in aqueous solution was 100%, which was superior to the samples prepared by other methods. Moreover, the Co3O4/In2O3 composite still had a high catalytic activity after five runs of PEC experiments. Elimination experiments demonstrate that photo-generated electrons (e–) performed a key role in the catalytic reduction of Cr(VI). The significantly improved PEC performance can be attributed to the bias voltage and the p-n heterojunction formed between Co3O4 and In2O3. Therefore, Co3O4/In2O3 nanocomposites have a considerable potential for the PEC reduction of Cr(VI).",

keywords = "PEC, reduction of Cr(VI), p-n heterojunction, Co3O4/In2O3, microwave-hydrothermal, Co O /In O",

author = "JieJie Nan and Sijia Guo and Dalal Alhashmialameer and Qingming He and Yinuo Meng and Ruixiang Ge and El-Bahy, {Salah M.} and Nithesh Naik and Vignesh Murugadoss and Mina Huang and Xu, {Ben Bin} and Qian Shao and Zhanhu Guo",

note = "Funding information: This work was supported by the Science and Technology Project of Qingdao West Coast New Area (No. 2020-91), the Natural Science Foundation of Shandong Province (No. ZR2019BEE075). The authors gratefully acknowledge financial support from Taif University Researchers Supporting Project number (TURSP-2020/135), Taif University, Taif, Saudi Arabia.",

year = "2022",

month = jul,

day = "22",

doi = "10.1021/acsanm.2c00107",

language = "English",

volume = "5",

pages = "8755–8766",

journal = "ACS Applied Nano Materials",

issn = "2574-0970",

publisher = "American Chemical Society",

number = "7",

}

TY - JOUR

T1 - Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

AU - Nan, JieJie

AU - Guo, Sijia

AU - Alhashmialameer, Dalal

AU - He, Qingming

AU - Meng, Yinuo

AU - Ge, Ruixiang

AU - El-Bahy, Salah M.

AU - Naik, Nithesh

AU - Murugadoss, Vignesh

AU - Huang, Mina

AU - Xu, Ben Bin

AU - Shao, Qian

AU - Guo, Zhanhu

N1 - Funding information: This work was supported by the Science and Technology Project of Qingdao West Coast New Area (No. 2020-91), the Natural Science Foundation of Shandong Province (No. ZR2019BEE075). The authors gratefully acknowledge financial support from Taif University Researchers Supporting Project number (TURSP-2020/135), Taif University, Taif, Saudi Arabia.

PY - 2022/7/22

Y1 - 2022/7/22

N2 - Co3O4/In2O3 nanocomposites were prepared via a microwave-hydrothermal method and directly used as photoanodes for the photoelectrocatalytic (PEC) process to reduce Cr(VI). The as-prepared Co3O4/In2O3 composites show a rod-like structure, which is composed of nanoparticles. The PEC experiments indicated that after 120 min of irradiation with 0.7 V bias voltage and visible light, the Cr(VI) reduction efficiency of Co3O4/In2O3 composites in aqueous solution was 100%, which was superior to the samples prepared by other methods. Moreover, the Co3O4/In2O3 composite still had a high catalytic activity after five runs of PEC experiments. Elimination experiments demonstrate that photo-generated electrons (e–) performed a key role in the catalytic reduction of Cr(VI). The significantly improved PEC performance can be attributed to the bias voltage and the p-n heterojunction formed between Co3O4 and In2O3. Therefore, Co3O4/In2O3 nanocomposites have a considerable potential for the PEC reduction of Cr(VI).

AB - Co3O4/In2O3 nanocomposites were prepared via a microwave-hydrothermal method and directly used as photoanodes for the photoelectrocatalytic (PEC) process to reduce Cr(VI). The as-prepared Co3O4/In2O3 composites show a rod-like structure, which is composed of nanoparticles. The PEC experiments indicated that after 120 min of irradiation with 0.7 V bias voltage and visible light, the Cr(VI) reduction efficiency of Co3O4/In2O3 composites in aqueous solution was 100%, which was superior to the samples prepared by other methods. Moreover, the Co3O4/In2O3 composite still had a high catalytic activity after five runs of PEC experiments. Elimination experiments demonstrate that photo-generated electrons (e–) performed a key role in the catalytic reduction of Cr(VI). The significantly improved PEC performance can be attributed to the bias voltage and the p-n heterojunction formed between Co3O4 and In2O3. Therefore, Co3O4/In2O3 nanocomposites have a considerable potential for the PEC reduction of Cr(VI).

KW - PEC

KW - reduction of Cr(VI)

KW - p-n heterojunction

KW - Co3O4/In2O3

KW - microwave-hydrothermal

KW - Co O /In O

UR - http://www.scopus.com/inward/record.url?scp=85135389470&partnerID=8YFLogxK

U2 - 10.1021/acsanm.2c00107

DO - 10.1021/acsanm.2c00107

M3 - Article

SN - 2574-0970

VL - 5

SP - 8755

EP - 8766

JO - ACS Applied Nano Materials

JF - ACS Applied Nano Materials

IS - 7

ER -

Hydrothermal Microwave Synthesis of Co3O4/In2O3 Nanostructures for Photoelectrocatalytic Reduction of Cr(VI)

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Keywords

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