Zinc oxide: reduced graphene oxide nanocomposite film for heterogeneous photocatalysis

Toporovska, L. R.; Turko, B.; Savchak, Mykhailo; Seyedi, Mastooreh; Luzinov, Igor; Kostruba, А.; Kapustianyk, V.; Vaskiv, A.

doi:10.1007/s11082-019-2132-1

Cited by 11 publications

(6 citation statements)

References 48 publications

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“…It can be considered as a suitable successor of the benchmark TiO 2 semiconductor due to its similar properties such as strong oxidation ability, good photocatalytic properties, chemical stability, biocompatibility, non-toxicity, high photosensitivity, and electronic and piezoelectric properties, among others [13][14][15]. This semiconductor usually exists in one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) associations [16], and has been used in a wide range of applications, such as sensors [17], photocatalysis [14,[18][19][20][21], transistors, solar cells [22,23], etc. It is well known that the use of ZnO in photocatalysis displays some drawbacks such as: (i) the limitation of its use in the visible range due to its wide band gap [24]; (ii) particle aggregation during photocatalytic reactions which significantly restrict the photocatalytic activity of ZnO at a large scale [25]; and (iii) the rapid recombination of the photogenerated electron-hole pairs [26,27].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Perfomance of ZnO-Graphene Oxide Composites towards the Degradation of Vanillic Acid under Solar Radiation and Visible-LED

et al. 2021

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Graphene oxide (GO) is used to enhance the photocatalytic activity of ZnO nanoparticles for the degradation of vanillic acid (VA) under simulated solar light and visible-LED (λ > 430 nm). ZnO-GO composites are prepared by a mixing and sonication process with different GO loadings (i.e., from 1.8 to 6.5 wt.%). The materials are extensively characterized by thermogravimetric analysis (TGA), physisorption of N2, X-ray diffraction (XRD), infrared spectroscopy (FTIR), scanning electron microscopy (SEM), point of zero charge (pHPZC), and UV-Vis diffuse reflectance spectroscopy (DRUV). The presence of GO increases the photocatalytic activity of all the prepared composites in comparison with the pristine ZnO. The highest photocatalytic activity is found for the composite containing 5.5 wt.% of GO (i.e., ZnO-GO5.5), reaching a VA degradation of 99% and 35% under solar light and visible-LED, respectively. Higher TOC removal/VA degradation ratios are obtained from the experiments carried out under visible-LED, indicating a more effective process for the mineralization of VA than those observed under simulated solar light. The influence of hole, radical, and non-radical scavengers is studied in order to assess the occurrence of the reactive oxygen species (ROS) involved in the photocatalytic mechanism. The study of the photo-stability during three reuse experiments indicates that the presence of GO in the composites reduces the photocorrosion in comparison with pristine ZnO.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Perfomance of ZnO-Graphene Oxide Composites towards the Degradation of Vanillic Acid under Solar Radiation and Visible-LED

et al. 2021

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“…Among different surface functionalizing agents, the research on metal oxide nanoparticles has recently gained momentum mainly because of their benign and highly catalytic nature, good stability, and cost-effectiveness . Metal oxide nanoparticles exhibit a wide range of applications in different areas of modern science, such as electrochemical sensors, energy storage, supercapacitors, adsorption, photocatalysis, drug delivery, biotechnology, , separation sciences, and electronics. ,− Zinc oxide nanoparticles (ZnO-NPs) are n-type semiconductor materials that exhibit a hexagonal wurtzite structure with a wide band gap (3.7 eV), nontoxic nature, low-cost, and outstanding properties such as high surface area and extraordinary mechanical, chemical, and electrical properties. , Due to these excellent properties, the ZnO-NPs are being extensively employed in various advanced fields, viz catalysis, photonic detectors, photovoltaics, optoelectronics devices, polarized light-emitting devices, and sensors. − In addition, nickel oxide (NiO) is a p-type semiconductor material with a band gap ranging from 3.6 to 4.0 eV . NiO-NPs have exceptional properties, such as high surface area, optical stability, variable oxidation state, high power density, large theoretical capacitance, fast electron transport, excellent electrical, mechanical and catalytic properties, etc.…”

Section: Introductionmentioning

confidence: 99%

“…93,95−97 Zinc oxide nanoparticles (ZnO-NPs) are ntype semiconductor materials that exhibit a hexagonal wurtzite structure with a wide band gap (3.7 eV), nontoxic nature, lowcost, and outstanding properties such as high surface area and extraordinary mechanical, chemical, and electrical properties. 98,99 Due to these excellent properties, the ZnO-NPs are being extensively employed in various advanced fields, viz catalysis, photonic detectors, photovoltaics, optoelectronics devices, polarized light-emitting devices, and sensors. 100−103 In addition, nickel oxide (NiO) is a p-type semiconductor material with a band gap ranging from 3.6 to 4.0 eV.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of NiO-Doped ZnO Nanoparticle-Decorated Reduced Graphene Oxide Nanohybrid for Highly Sensitive and Selective Electrochemical Sensing of Bisphenol A in Aqueous Samples

Buledi

Shaikh

Solangi

et al. 2023

Ind. Eng. Chem. Res.

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Bisphenol A (BPA) is broadly used in the plastic industry and has several health effects, especially on the brain and prostate gland of fetuses. BPA is a major environmental pollutant that drains into bodies of water and leaches from food packaging. Since it is a known endocrine disruptor, its extensive release into the environment is a serious concern. Thus, regular monitoring of BPA through a reliable and sensitive method is a strategy that can help alleviate its impact. To tackle this issue, an excellent conductive material based on a NiO/ZnO/rGO nanohybrid was used as an electrocatalyst to determine BPA in drinking water samples. The engineered material was characterized through XRD, EDX, and SEM. The EDX mapping was also used to examine the purity, surface texture, and focused elemental composition of the NiO/ZnO/rGO nanohybrid. The average size of the prepared material was calculated as 43.7 nm, which confirmed the nanometric size of the engineered nanohybrid material. The conductive behavior of the fabricated sensor NiO/ZnO/rGO/PtE was examined through electrochemical impedance spectroscopy (EIS) and cyclic voltammetry. The modified sensor revealed an excellent conductive nature with ohmic resistance calculated to be 412 Ω, which is lower than that of the bare electrode and GO/PtE (3628 and 2239 Ω, respectively). Under optimal parameters, the fabricated sensor showed excellent response for BPA. With a linear dynamic range of 0.07−30 μM, NiO/ZnO/rGO/PtE manifested the lowest possible detection limit found (4.0 nM). The analytical applicability of the proposed sensor was investigated in bottled and tap water. Furthermore, both the acceptable recovery values and anti-interference ability indicated the effectiveness and potential commercial utilization of NiO/ZnO/rGO/PtE. The recovery values for mineral and tap water were 97.0%, 99.0%, and 97.3% and 101%, 99.6%, and 98.7%, respectively.

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“…To enhance the photocatalytic activity of ZnS nanoparticles, they were located on the surface of graphene nanosheets. According to literature, the photocatalytic activity of semiconductor materials can be improved by the graphene addition since graphene with larger surface area provides more active adsorption sites acting as photocatalytic reaction centers [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Water chemical treatment by photocatalytic activity of reduced graphene oxide-decorated zinc sulfide nanocomposite

Mosayebi,

Dorranian,

Sari

et al. 2023

Phys. Scr.

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The photocatalytic properties of reduced graphene oxide decorated ZnS nanocomposite was employed for photodegradation of phenol red as a chemical agent in water. ZnS nanocomposite was synthesized by hydrothermal method. Reduced graphene oxide decorated ZnS nanocomposite was produced by pulsed laser ablation of graphite bulk in the solution of ZnS nanocomposite. Variety of spectroscopic and imaging diagnostics including X-ray diffraction (XRD), UV-Vis absorption spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were used to characterize the synthesized nanostructures. Water treatment was carried out in a closed handmade reactor. The concentration of the phenol red pollutant as the chemical agent, was extracted from the absorption spectra of treated water. Dependence of the behaviors of phenol red dye on the pH of the medium was studied in detail. Effects of UV radiation intensity, treatment time, pH of the polluted water, and aging on the efficiency of the treatment were investigated. Results show that even in the dark condition rGO-ZnS nanocomposite is an effective material to remove phenol red pollutant from water. The highest efficiency of treatment after 120 minutes was achieved in neutral pH water. Furthermore, after 7 days, with nanostructures and without UV radiation, the removal process in the polluted water was continued.

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Zinc oxide: reduced graphene oxide nanocomposite film for heterogeneous photocatalysis

Cited by 11 publications

References 48 publications

Photocatalytic Perfomance of ZnO-Graphene Oxide Composites towards the Degradation of Vanillic Acid under Solar Radiation and Visible-LED

Photocatalytic Perfomance of ZnO-Graphene Oxide Composites towards the Degradation of Vanillic Acid under Solar Radiation and Visible-LED

Synthesis of NiO-Doped ZnO Nanoparticle-Decorated Reduced Graphene Oxide Nanohybrid for Highly Sensitive and Selective Electrochemical Sensing of Bisphenol A in Aqueous Samples

Water chemical treatment by photocatalytic activity of reduced graphene oxide-decorated zinc sulfide nanocomposite

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