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28884

Nanocomposite of TiO2 @ Ni- or Co-doped Graphene Oxide for Efficient Photocatalytic Water Splitting

Article

Last updated: 22 Jan 2023

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Subjects

-

Tags

Environmental chemistry

Abstract

Nanocomposites of TiO2@Ni-doped or Co-doped graphene oxide (GO) have been suceesfully prepared and are employed for photocalytic water splitting. TEM images showed doted nanostructure and scattered-appearance of Co, Ni with and TiO2 nanoparticles on GO sheet. The XRD patterns proved the existence of the crystal planes of Ni, Co and TiO2 nanoparticles on GO. Moreover, the absorption spectrum of the prepared samples showed a better percentage of absorption of the visible light upon introducing of NiO aor CoO. EDX analysis results confirmed the presence of Co, C, O, and Ti elements in the sample. Interestingly, both n-TiO2/p-NiO/GO and n-TiO2/p-CoO/GO heterojunctions photocatalyst improved the photo-catalytic activity for water splitting nonetheless with different mechanisms. The n-TiO2/p-NiO/GO photocatalyst showed a higher hydrogen production rate of 0.3 mmole/min/g than that of n-TiO2/p-CoO/GO. The generated e/h pairs in the TiO2 part of the catalyst is kept through the effect of the electric field formed by the p-NiO/n-TiO2 heterojunction while Co presence narrows the bandgap and promotes both hydrogen evolution reactions at the conduction and valence band of heterojunctions.

DOI

10.21608/ejchem.2019.9722.1648

Keywords

graphene oxide, TiO2 nanoparticles, Photocatalyst, water splitting

Authors

First Name

Mohammad M.

Last Name

Almutairi

MiddleName

-

Affiliation

Ministry of Electricity and Water, Kuwait, Kuwait, P.O.12010, Chemical Engineering Department, Minia University, El-Minia, 61111, Egypt.

Email

busemri@hotmail.com

City

-

Orcid

-

First Name

Ebraheim E.

Last Name

Ebraheim

MiddleName

-

Affiliation

Chemical Engineering Department, Minia University, El-Minia, 61111, Egypt.

Email

ebr_esmail_2004@yahoo.com

City

-

Orcid

-

First Name

Mohamed S.

Last Name

Mahmoud

MiddleName

-

Affiliation

Chemical Engineering Department, Minia University, El-Minia, 61111, Egypt., College of Applied Science, Department of Engineering, Suhar, 331, Oman

Email

msmm122@yahoo.com

City

-

Orcid

-

First Name

Mohamed S.

Last Name

Atrees

MiddleName

-

Affiliation

Nuclear Materials Authority, Maadi Road, Elqattamia, Cairo, Egypt. P.O. 530.

Email

smatreessemida@gmail.com

City

-

Orcid

0000-0002-8055-477X

First Name

Mohamed E. M.

Last Name

Ali

MiddleName

-

Affiliation

Water Pollution Research Department, Environmental Sciences Division, National Research Centre (NRC), 33 El-Behouth St., Dokki, Cairo, Egypt, P.O. 12622.

Email

alienv81@yahoo.com

City

-

Orcid

0000-0002-1157-1752

First Name

Yasser Mahmoud

Last Name

Khawassek

MiddleName

-

Affiliation

Nuclear Materials Authority, Maadi Road, Elqattamia, Cairo, Egypt. P.O. 530.

Email

yasser_khawassek@yahoo.com

City

-

Orcid

0000-0002-8758-4330

Volume

62

Article Issue

9

Related Issue

7302

Issue Date

2019-09-01

Receive Date

2019-02-17

Publish Date

2019-09-01

Page Start

1,649

Page End

1,658

Print ISSN

0449-2285

Online ISSN

2357-0245

Article File

EJCHEM_Volume 62_Issue 9_Pages 1649-1658.pdf

PDF . 1.5MB

Link

https://ejchem.journals.ekb.eg/article_28884.html

Detail API

https://ejchem.journals.ekb.eg/service?article_code=28884

Order

7

Type

Original Article

Type Code

297

Publication Type

Journal

Publication Title

Egyptian Journal of Chemistry

Publication Link

https://ejchem.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023