Surprising Effects of Ti and Al2O3 Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles

Xu, Xi; Mao, Chenyue; Song, Jiannan; Ke, Senhua; Hu, Yongming; Chen, Wanping; Pan, Chunxu

doi:10.3390/ma17143487

Open AccessFeature PaperArticle

Surprising Effects of Ti and Al₂O₃ Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles

by

Xi Xu

¹,

Chenyue Mao

¹,

Jiannan Song

¹,

Senhua Ke

¹,

Yongming Hu

²,

Wanping Chen

^1,* and

Chunxu Pan

^1,*

¹

Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China

²

Hubei Key Laboratory of Micro–Nanoelectronic Materials and Devices, School of Microelectronics, Hubei University, Wuhan 430062, China

^*

Authors to whom correspondence should be addressed.

Materials 2024, 17(14), 3487; https://doi.org/10.3390/ma17143487

Submission received: 6 June 2024 / Revised: 11 July 2024 / Accepted: 12 July 2024 / Published: 14 July 2024

(This article belongs to the Special Issue Advances in Materials Science and Engineering—in Celebration of 55th Anniversary of the Faculty of Technical Sciences, Warmia and Mazury University in Olsztyn, Poland)

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Abstract

GaN is more stable than most metal oxide semiconductors for the photocatalytic degradation of organic pollutants in harsh conditions, while its catalytic efficiency has been difficult to be substantially improved. In this study, the tribocatalytic degradation of organic dyes by GaN nanoparticles has been investigated. Stimulated through magnetic stirring using homemade Teflon magnetic rotary disks in glass beakers, the GaN nanoparticles were found to induce negligible degradation in rhodamine B (RhB) and methyl orange (MO) solutions. Surprisingly, the degradation was greatly enhanced in beakers with Ti and Al₂O₃ coatings on their bottoms: 99.2% and 99.8% of the 20 mg/L RhB solutions were degraded in 3 h for the Ti and Al₂O₃ coatings, respectively, and 56% and 60.2% of the 20 mg/L MO solutions were degraded in 24 h for the Ti and Al₂O₃ coatings, respectively. Moreover, the MO molecules were only broken into smaller organic molecules for the Ti coating, while they were completely degraded for the Al₂O₃ coating. These findings are important for the catalytic degradation of organic pollutants by GaN in harsh environments and for achieving a better understanding of tribocatalysis as well.

Keywords: tribocatalysis; coatings; dye degradation; GaN

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MDPI and ACS Style

Xu, X.; Mao, C.; Song, J.; Ke, S.; Hu, Y.; Chen, W.; Pan, C. Surprising Effects of Ti and Al₂O₃ Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles. Materials 2024, 17, 3487. https://doi.org/10.3390/ma17143487

AMA Style

Xu X, Mao C, Song J, Ke S, Hu Y, Chen W, Pan C. Surprising Effects of Ti and Al₂O₃ Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles. Materials. 2024; 17(14):3487. https://doi.org/10.3390/ma17143487

Chicago/Turabian Style

Xu, Xi, Chenyue Mao, Jiannan Song, Senhua Ke, Yongming Hu, Wanping Chen, and Chunxu Pan. 2024. "Surprising Effects of Ti and Al₂O₃ Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles" Materials 17, no. 14: 3487. https://doi.org/10.3390/ma17143487

APA Style

Xu, X., Mao, C., Song, J., Ke, S., Hu, Y., Chen, W., & Pan, C. (2024). Surprising Effects of Ti and Al₂O₃ Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles. Materials, 17(14), 3487. https://doi.org/10.3390/ma17143487

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Surprising Effects of Ti and Al₂O₃ Coatings on Tribocatalytic Degradation of Organic Dyes by GaN Nanoparticles

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