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Title: Characteristics of ZnO nanostructures synthesized by sonochemical reaction: Effects of continuous and pulse waves

Nanostructured ZnO was synthesized by a sonochemical reaction. Ultrasonic irradiation were set up in continuous, pulse in 3 seconds on and a second off (on:off=3:1), and pulse in 2 seconds on and a second off (on:off=2:1) wave modes for 1.5 hours. The characteristics of particles generated by these modes such as morphology, crystallinity, FTIR, photoluminescence, and photocatalytic activity to degrade methylene blue were compared. Zinc nitrate and ammonia water-based solutions were selected as chemicals without the addition of other surfactants. The morphology of the generated ZnO particles could be tuned from flower-like, needle- or hairy-like, and spherical structures by changing the mode of ultrasonic irradiation from continuous, on:off=3:1, and on:off=2:1 modes, respectively. The generated particles indicated that a wurtzite structure of ZnO in a hexagonal phase was formed. The crystalline sizes of particles generated in continuous, on:off=3:1, and on:off=2:1 modes were 28, 27, 24 nm. A similar position of reduction peak of FTIR in all samples indicated that no differences in particles chemical bonding characteristics. Photoluminescence intensity was also decreased with changes the wave mode from continuous to pulse. Photocatalytic activity was also evaluated resulting in particles synthesized by continuous mode had the highest methylene blue degradation degree following by on:off=3:1,more » and on:off=2:1 modes.« less
Authors:
; ; ; ;  [1]
  1. Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo Surabaya 60111 (Indonesia)
Publication Date:
OSTI Identifier:
22494464
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1699; Journal Issue: 1; Conference: International conference of chemical and material engineering (ICCME) 2015: Green technology for sustainable chemical products and processes, Semarang (Indonesia), 29-30 Sep 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMMONIA; CHEMICAL BONDS; COMPARATIVE EVALUATIONS; FOURIER TRANSFORM SPECTROMETERS; INFRARED SPECTRA; IRRADIATION; METHYLENE BLUE; MORPHOLOGY; NANOSTRUCTURES; PARTICLES; PHOTOCATALYSIS; PHOTOLUMINESCENCE; PULSES; REDUCTION; SPHERICAL CONFIGURATION; SURFACTANTS; ULTRASONIC WAVES; WATER; ZINC NITRATES; ZINC OXIDES