Effect of carbon nanotubes loading on the photocatalytic activity of zinc oxide/carbon nanotubes photocatalyst synthesized via a modified sol-gel method

Phin, Hor-Yan; Ong, Yit Thai; Sin, Jin–Chung

doi:10.1016/j.jece.2019.103222

Cited by 54 publications

(30 citation statements)

References 40 publications

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“…Therefore, acid oxidation has been adopted to modify the surface characteristic of CNTs and promote their reactivity with Zn 2+ precursor during the synthesis of ZnO/CNTs photocatalyst. During acid oxidation, defects were created along the side wall of CNTs to allow the accommodation of oxygenated functional group such as carboxylic group on the CNTs as evidenced in our previous study 30 and the XPS analysis in Figure 5. The presence of oxygenated functional group renders a negatively charged surface of CNTs.…”

Section: Resultsmentioning

confidence: 79%

“…Firstly, CNTs were subjected to acid oxidation treatment with a mixture of H 2 SO 4 and HNO 3 in 3:1 (v/v%) at 100°C for 6 h. It was then washed with distilled water until neutral pH and dried in the oven at 80°C for 24 h. The ZnO/CNTs photocatalysts with 10 wt% of CNTs was synthesized via modified sol–gel method as reported in the previous study 30 . In brief, 0.1 M of zinc acetate dihydrate aqueous solution was prepared prior to the addition of CNTs followed by 15 min of ultrasonication.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous study, 30 we have successfully synthesized zinc oxide/carbon nanotubes (ZnO/CNTs) photocatalyst via a modified sol–gel method. Apparently, methylene blue (MB) degradation via photocatalysis was found to be gradually enhanced with increasing CNTs loading from 2 wt% to 10 wt% in ZnO/CNTs photocatalyst.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of asymmetric zinc oxide/carbon nanotubes coated polysulfone photocatalytic nanocomposite membrane for fouling mitigation

Phin

Sin

Tan

et al. 2021

J of Applied Polymer Sci

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Section: Resultsmentioning

confidence: 79%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication of asymmetric zinc oxide/carbon nanotubes coated polysulfone photocatalytic nanocomposite membrane for fouling mitigation

Phin

Sin

Tan

et al. 2021

J of Applied Polymer Sci

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“…As shown in Figure 5(B), the band gap decreased with increasing f‐rGO loading due to the formation of new levels in the optical band gap. The slight drop of Eg from 2.62 to 2.56 eV at 0.04 wt.% of f‐rGO loading was likely due to light absorption by nanoparticles 50 . It has been previously reported that the variations in the optical band gap changes the electronic structure of PVA molecules and there was no effect of higher filler concentration on band gap 49 …”

Section: Resultsmentioning

confidence: 83%

Highly electro‐responsive composite gel based on functionally tuned graphene filled polyvinyl chloride

Ali

et al. 2021

Polymers for Advanced Techs

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Electroresponsive devices have attended significant interest for actuators and artificial muscles in recent days but are susceptible to low deformation at applied voltages. To address this problem, herein, we have prepared novel flexible composite gel based on polyvinyl chloride (PVC), dibutyl adipate (DBA), and functionalized reduced graphene oxide (f‐rGO) via solution casting technique. The structural, morphological, optical, mechanical, and thermal properties of the composite PVC/f‐rGO gel were characterized by using various techniques. In order to test the usefulness of PVC/f‐rGO, we fabricated the new planar PVC/f‐rGO‐based gel actuator, by holding the gel between two electrodes. Stimuli‐responsive deformation of ~2.7 mm was measured at a voltage of 1200 V for an optimized gel in the designed device. The loading of silane‐f‐rGO greatly enhanced the stimulation, response time and flexibility of the PVC gel. The highest elongation at break of about 433% was achieved for f‐rGO‐loaded PVC gel owing to strong dipole–diploe interactions between alpha hydrogen of PVC and ‐NH2 of f‐rGO. We believe that highly electro‐stimulated, soft and, flexible PVC/f‐rGO gels could open a new avenue for the fabrication of advanced artificial muscles and tunable soft actuators for number of applications.

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“…known to have attraction among researchers such as carbon nanotube (CNT), titanium dioxide nanotube (TiO 2 nanotube), nickel oxide (NiO), as well as zinc oxide (ZnO) nanostructures [5][6][7][8]. Among these numerous materials, ZnO is a diverse functional material due to its own properties and functionalities.…”

mentioning

confidence: 99%

Synthesis of Zinc Oxide Nanostructure by Chemical Bath Deposition (CBD) Method: Influence of Growth Time towards Nanostructure Characteristics

Rahman,

Zulkefle,

Herman*

et al. 2019

IJRTE

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Growth of zinc oxide (ZnO) nanostructure on seeded indium tin oxide (ITO) via chemical bath deposition were presented in this study. Growth time is believed to have vital role in order to control the physical (morphology), optical and structural characteristics of ZnO nanostructures. Several growth time of ZnO nanostructure were varied (1 H – 3.5 H) as the purpose to investigate its effect towards the growth of ZnO nanostructures, as well as their characteristics. In this study, the influence of growth time was determined using field emission scanning electron microscope (FESEM), ultra-violet visible spectrometer (UV-Vis) and x-ray diffraction (XRD). Based on the results obtained, morphological, optical and structural characteristics of ZnO nanostructure thin films grown at various growth time present different characteristics and properties. According to the results obtained, it is proved that growth time is a vital parameter to control the ZnO nanostructure growing process. ZnO nanostructure morphological changes significantly with the changes of the growing time process. As well as optical properties, the changes of absorbance and transmittance value influence the optical energy band gap of ZnO nanostructure in this study, which is the average value is 3.31 -3.40 eV. The structural characteristic of the ZnO nanostructure also affected significantly with the difference of growth time, where the crystallinity is improved with the longer growth time.

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Effect of carbon nanotubes loading on the photocatalytic activity of zinc oxide/carbon nanotubes photocatalyst synthesized via a modified sol-gel method

Cited by 54 publications

References 40 publications

Fabrication of asymmetric zinc oxide/carbon nanotubes coated polysulfone photocatalytic nanocomposite membrane for fouling mitigation

Fabrication of asymmetric zinc oxide/carbon nanotubes coated polysulfone photocatalytic nanocomposite membrane for fouling mitigation

Highly electro‐responsive composite gel based on functionally tuned graphene filled polyvinyl chloride

Synthesis of Zinc Oxide Nanostructure by Chemical Bath Deposition (CBD) Method: Influence of Growth Time towards Nanostructure Characteristics

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