ZnO nanocubes with (1 0 1) basal plane photocatalyst prepared via a low-frequency ultrasonic assisted hydrolysis process

Sin Tee Tan, Ali Umar Akrajas, Aamna Balouch, Muhammad Yahaya, Chi Chin Yap, Muhamad Mat Salleh, Munetaka Oyama

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The crystallographic plane of the ZnO nanocrystals photocatalyst is considered as a key parameter for an effective photocatalysis, photoelectrochemical reaction and photosensitivity. In this paper, we report a simple method for the synthesis of a new (1 0 1) high-energy plane bounded ZnO nanocubes photocatalyst directly on the FTO surface, using a seed-mediated ultrasonic assisted hydrolysis process. In the typical procedure, high-density nanocubes and quasi-nanocubes can be grown on the substrate surface from a solution containing equimolar (0.04 M) zinc nitrate hydrate and hexamine. ZnO nanocubes, with average edge-length of ca. 50 nm, can be obtained on the surface in as quickly as 10 min. The heterogeneous photocatalytic property of the sample has been examined in the photodegradation of methyl orange (MO) by UV light irradiation. It was found that the ZnO nanocubes exhibit excellent catalytic and photocatalytic properties and demonstrate the photodegradation efficiency as high as 5.7 percent/μg mW. This is 200 times higher than those reported results using a relatively low-powered polychromatic UV light source (4 mW). The mechanism of ZnO nanocube formation using the present approach is discussed. The new-synthesized ZnO nanocubes with a unique (1 0 1) basal plane also find potential application in photoelectrochemical devices and sensing.

Original languageEnglish
Pages (from-to)754-760
Number of pages7
JournalUltrasonics Sonochemistry
Volume21
Issue number2
DOIs
Publication statusPublished - Mar 2014

Fingerprint

Photolysis
Ultraviolet Rays
Photocatalysts
Ultrasonics
hydrolysis
Hydrolysis
ultrasonics
Photodegradation
Methenamine
low frequencies
Ultraviolet radiation
photoelectrochemical devices
Nanoparticles
Seeds
Photosensitivity
Photocatalysis
photosensitivity
Hydrates
hydrates
Equipment and Supplies

Keywords

  • Heterogeneous photocatalysis
  • Seed-mediated growth method
  • Ultrasonic-assisted hydrolysis
  • ZnO nanocube

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Acoustics and Ultrasonics
  • Radiology Nuclear Medicine and imaging

Cite this

ZnO nanocubes with (1 0 1) basal plane photocatalyst prepared via a low-frequency ultrasonic assisted hydrolysis process. / Tan, Sin Tee; Akrajas, Ali Umar; Balouch, Aamna; Yahaya, Muhammad; Yap, Chi Chin; Mat Salleh, Muhamad; Oyama, Munetaka.

In: Ultrasonics Sonochemistry, Vol. 21, No. 2, 03.2014, p. 754-760.

Research output: Contribution to journalArticle

Tan, Sin Tee ; Akrajas, Ali Umar ; Balouch, Aamna ; Yahaya, Muhammad ; Yap, Chi Chin ; Mat Salleh, Muhamad ; Oyama, Munetaka. / ZnO nanocubes with (1 0 1) basal plane photocatalyst prepared via a low-frequency ultrasonic assisted hydrolysis process. In: Ultrasonics Sonochemistry. 2014 ; Vol. 21, No. 2. pp. 754-760.
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