Tailoring the active surface sites of ZnO nanorods on the glass substrate for photocatalytic activity enhancement

Roza, Liszulfah; Fauzia, Vivi; Rahman, Mohd Yusri Abd

doi:10.1016/j.surfin.2019.02.009

Cited by 46 publications

(22 citation statements)

References 65 publications

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“…The crystal size ( D ), dislocation density (ε), and texture coefficient ( T c ) were calculated using equations (4) to (6) as listed in Table 2 23,24,31,33,34 where k is a constant (0.89), β is the full-width at half-maximum intensity, I ( hkl ) is the intensity of preferred orientation plane from measurement, I 0( hkl ) is the standard intensity of preferred orientation plane from JCPDs, and N is the number of considered planes. The crystal size of GQDs–ZnO nanocomposites initially increases with the increase in the GQD concentration until it reaches the maximum value and slightly decreases afterward for all planes.…”

Section: Resultsmentioning

confidence: 99%

Modified graphene quantum dots-zinc oxide nanocomposites for photocatalytic degradation of organic dyes and commercial herbicide

Phophayu

Pimpang

Wongrerkdee

et al. 2019

Journal of Reinforced Plastics and Composites

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The high crystallinity of graphene quantum dots-ZnO nanocomposites is considered to have a significant effect in improving the carrier lifetime for enhanced photocatalytic degradation. The graphene quantum dots-ZnO nanocomposites were synthesized by adding graphene quantum dots solution into starting precursors during the precipitation. Characterization was performed using various techniques. High crystallinity of graphene quantum dots-ZnO nanocomposites is obtained in terms of increased crystal size and decreased dislocation density. The improved crystallinity increases the carrier lifetime on the material surface for the functional improvement of photocatalytic material. Photocatalytic test of methylene blue and methyl orange was performed under UV irradiation. Degradation rate constant reaches the maximum value for both organic dyes for the appropriate preparing condition of graphene quantum dots-ZnO nanocomposites. The graphene quantum dots-ZnO nanocomposites were then applied to degrade commercial glyphosate herbicide contaminants for an agricultural wastewater treatment investigation. The investigation aims to demonstrate a facile useful way of herbicide contaminant reduction for the better health of farmers. The graphene quantum dots-ZnO nanocomposites show an enhancement of the photocatalytic process with improved degradation rate constant (23% increased) in comparison to pure ZnO. Therefore, this work demonstrates that graphene quantum dots-ZnO nanocomposites can be used as a photocatalytic material for degrading organic dyes and commercial herbicide contaminants owing to its low-cost and environmental-friendly properties.

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Section: Resultsmentioning

confidence: 99%

Modified graphene quantum dots-zinc oxide nanocomposites for photocatalytic degradation of organic dyes and commercial herbicide

Phophayu

Pimpang

Wongrerkdee

et al. 2019

Journal of Reinforced Plastics and Composites

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“…Among the semiconductor SERS substrates, ZnO has been proven to be a promising candidate because of its structural versatility, tunable optical properties, efficient charge/energytransfer processes with molecular structures, and so on. [11][12][13][14][15][16] More importantly, by combining noble metal NPs with pure semiconductors, the LSPR absorption region of composite substrates can be expanded, which improves their SERS activity. [17][18][19] Recently, a few Ag/ZnO-based nanocomposites have been constructed for SERS detection.…”

Section: Introductionmentioning

confidence: 99%

Aluminum sheet-induced porous zinc oxide nanosheets decorated with silver nanoparticles for ultrasensitive SERS sensing of crystal violet

Chen

Wang

et al. 2022

Mater. Adv.

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“… 5 , 6 Transition metal–semiconductor nanoparticles such as ZnS, NiS 2 , CdS, ZnO, TiO 2 , and CeO 2 /Fe 3 O 4 have been studied in photocatalytic hydrogen generation, photodegradation, and oxidation of organic contaminants. 7 − 10 Metal sulfides are considered as efficient photocatalysts due to their ability to absorb light in the visible and ultraviolet region, electronic structure, and easier access to electron–hole pair on photoexcitation. 11 It has also been shown that metal sulfide can degrade toxic environmental contaminants to nonhazardous products.…”

Section: Introductionmentioning

confidence: 99%

Morphological Studies, Photocatalytic Activity, and Electrochemistry of Platinum Disulfide Nanoparticles from Bis(morpholinyl-4-carbodithioato)-platinum(II)

2020

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Bis(morpholinyl-4-carbodithioato)-platinum(II) was synthesized and characterized using spectroscopic techniques and single-crystal X-ray crystallography. The Pt(II) complex crystallized in a monoclinic space group P 2 1 / n with a Pt(II) ion located on an inversion center coordinated two morpholinyl dithiocarbamate ligands that are coplanar to form a slightly distorted square planar geometry around the Pt(II) ion. The complex was thermolyzed at 120, 180, and 240 °C to prepare PtS 2 nanoparticles. Powder X-ray diffraction patterns confirmed the hexagonal crystalline phase for the as-prepared PtS 2 nanoparticles irrespective of thermolysis temperature. Bead-like shaped PtS 2 - 120 nanoparticles with a particle size in the range of 12.46–64.97 nm were formed at 120 °C, while PtS 2 - 180 prepared at 180 °C is quasi-spherical in shape with particles in the range of 24.30–46.87 nm. The PtS 2 - 240 obtained at 240 °C is spherical with particles in the range of 11.45–46.85 nm. The broad emission maxima of the as-prepared PtS 2 nanoparticles are ascribed to the particles’ broad size distributions. The photocatalytic degradation of methylene blue by the PtS 2 nanoparticles shows a maximum efficiency of 87% for PtS 2 - 240 after 360 min. The effects of photocatalytic dosage, irradiation time, pH medium, and scavengers were also evaluated. Cyclic voltammetry of the PtS 2 nanoparticles showed a reversible redox reaction, while the electrochemistry of the as-prepared PtS 2 indicates that the electron transfer process is diffusion-controlled.

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Tailoring the active surface sites of ZnO nanorods on the glass substrate for photocatalytic activity enhancement

Cited by 46 publications

References 65 publications

Modified graphene quantum dots-zinc oxide nanocomposites for photocatalytic degradation of organic dyes and commercial herbicide

Modified graphene quantum dots-zinc oxide nanocomposites for photocatalytic degradation of organic dyes and commercial herbicide

Aluminum sheet-induced porous zinc oxide nanosheets decorated with silver nanoparticles for ultrasensitive SERS sensing of crystal violet

Morphological Studies, Photocatalytic Activity, and Electrochemistry of Platinum Disulfide Nanoparticles from Bis(morpholinyl-4-carbodithioato)-platinum(II)

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