Volume 69, Issue 7 pp. 1020-1031
ARTICLE

Fabrication of a visible-light-driven p-type NiWO4/n-type SnO2 heterojunction with efficient photocatalytic activity for degradation of Amaranth

Eswaran Kamaraj

Eswaran Kamaraj

Department of Chemistry, College of Natural Sciences, Kongju National University, Gongju, Republic of Korea

School of Chemical Engineering, Yeungnam University, Gyeongsan, Republic of Korea

Search for more papers by this author
Yong Rok Lee

Corresponding Author

Yong Rok Lee

School of Chemical Engineering, Yeungnam University, Gyeongsan, Republic of Korea

Correspondence

Yong Rok Lee, School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.

Email: [email protected]

Kavitha Balasubramani, Department of Chemistry, Cardamom Planters' Association College, Bodinayakanur 625513, Tamil Nadu, India.

Email: [email protected].

Search for more papers by this author
Kavitha Balasubramani

Corresponding Author

Kavitha Balasubramani

Department of Chemistry, Cardamom Planters' Association College, Bodinayakanur, India

Correspondence

Yong Rok Lee, School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.

Email: [email protected]

Kavitha Balasubramani, Department of Chemistry, Cardamom Planters' Association College, Bodinayakanur 625513, Tamil Nadu, India.

Email: [email protected].

Search for more papers by this author
First published: 13 June 2022
Citations: 1

Funding information: University Grants Commission - India, Grant/Award Number: UGC-F.No-MRP-6006/15 (SERO)

Abstract

In this study, n-type SnO2 was synthesized and modified with p-type NiWO4 to create a new NiWO4/SnO2 p–n heterojunction photocatalyst for effective organic dye degradation (Amaranth). X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV–Vis diffuse reflection spectroscopy (DRS), and Brunauer–Emmett–Teller (BET) surface area analysis were all used to evaluate the synthesized materials. Through its internal electric field and strong driving force, the composite photocatalyst with p–n heterojunction considerably enhances charge generation and suppresses photogenerated electron–hole recombination, which would be beneficial to boost their photocatalytic performance. At 180 min, the NiWO4/SnO2 photocatalyst had the maximum efficiency for degrading Amaranth, up to 93%. Finally, the experimental results were used to rationally analyze the photodegradation mechanism.

CONFLICT OF INTEREST

The authors declare no conflict of interest.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.