Solvothermal synthesis of ZnO spheres: Tuning the structure and morphology from nano- to micro-meter range and its impact on their photocatalytic activity

Kovács, Zoltán; Molnár, Csanád; Gyulavári, Tamás; Tóth, Zsejke-Réka; Baia, Lucian; Pap, Zsolt; Magyari, Klára

doi:10.1016/j.cattod.2022.03.004

Cited by 26 publications

(9 citation statements)

References 51 publications

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“…This method is widely used by many researchers. Besides, similar to metal sulfides, it is possible to be fabricated via a simple solvothermal synthesis [49] …”

Section: Synthesis Of Dielectric Nanospheresmentioning

confidence: 99%

“…Besides, similar to metal sulfides, it is possible to be fabricated via a simple solvothermal synthesis. [49] As for the metal oxides with unstable valence states such as Cu 2 O, it is necessary to synthesize them by an oxidationreduction process. It is difficult to control the oxidation of Cu, so the reduction of Cu 2 + is a common method to prepare Cu 2 O spheres.…”

Section: Polycrystalline Nanospheresmentioning

confidence: 99%

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Synthesis of Dielectric Nanospheres with Moderate‐Refractive‐Index and Applications in Photon Manipulating

Sun

Zhang

et al. 2022

Eur J Inorg Chem

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The nanostructures for photon manipulating (NSPMs) have attracted widespread attention owing to their ability to directionally control light propagations. The related research has also been developed from basic theoretical studies to various practical applications. Taking dielectric nanospheres with moderate-refractive-index as the building blocks is becoming a new trend to construct the NSPMs, because of their low processing cost and negligible light energy losses. In this review, we will summarize the synthetic methods towards dielectric nano-spheres with moderate-refractive-index and their light manipulating mechanism. Another specific focus of this review is devoted to the practical applications of the NSPMs composed of dielectric nanospheres with moderate-refractive-index, such as coloring, sensors, regulating luminescence, and surface enhanced Raman scattering. Finally, the challenges and outlook of the dielectric nanospheres with moderate-refractive-index in synthesis and applications will be considered.

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“…This method is widely used by many researchers. Besides, similar to metal sulfides, it is possible to be fabricated via a simple solvothermal synthesis [49] …”

Section: Synthesis Of Dielectric Nanospheresmentioning

confidence: 99%

Section: Polycrystalline Nanospheresmentioning

confidence: 99%

Synthesis of Dielectric Nanospheres with Moderate‐Refractive‐Index and Applications in Photon Manipulating

Sun

Zhang

et al. 2022

Eur J Inorg Chem

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“…Among the methods used for solving the environmental pollution problem, photocatalytic technology has attracted much attention because of the fact that clear and renewable solar energy can be used to degrade pollutants [3][4][5][6][7][8]. Thus far, a variety of semiconductor materials, such as TiO 2 , ZnO, WO 3 , CuO, CeO 2 , and their composites, have been widely studied for photocatalysis applications [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Among these materials, ZnO has been widely studied because it is non-toxic and easy to synthesize [18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Thus far, a variety of semiconductor materials, such as TiO 2 , ZnO, WO 3 , CuO, CeO 2 , and their composites, have been widely studied for photocatalysis applications [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Among these materials, ZnO has been widely studied because it is non-toxic and easy to synthesize [18][19][20][21][22][23][24][25][26][27][28]. Up to now, powdery ZnO in various morphologies, including nanowires, spherical structures, and hierarchical structures, have been successfully prepared and used to study their photocatalytic properties [18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

ZnO Nanorods Grown on Rhombic ZnO Microrods for Enhanced Photocatalytic Activity

et al. 2022

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In this paper, the formation of rhombic ZnO microrods surrounded by ZnO nanorods was realized on the surfaces of zinc foils using a hydrothermal method. The photocatalytic degradation of Rhodamine B solution was used to test the photocatalytic performance of the prepared samples. Compared with the rhombic Zn(OH)F and ZnO microrods grown on zinc foils, the hierarchical micro/nanostructures formed by ZnO nanorods surrounding the surfaces of rhombic ZnO microrods have better photocatalytic performance. The experimental results are mainly due to the fact that the hierarchical ZnO micro/nanostructures formed by ZnO nanorods surrounding the surface of the rhombic ZnO microrods have a larger surface area compared with the rhombic Zn(OH)F and ZnO microrods. More importantly, the photocatalytic circulation experiments indicate that ZnO nanorods grown on rhombic ZnO microrods can be recycled and have a relatively stable photocatalytic performance.

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“…8 The photocatalyst properties are an essential factor in photocatalytic activity, previous literature reports show that the smaller nanoparticles (NPs) increased the dye photodegradation, this behavior is attributed to high surface area and chemical reactivity. 9,10 Several methods of NPs semiconductors synthesis have been developed, that includes physical and chemical approaches such as solvothermal, 11 sol-gel, 12 chemical precipitation, 13 atomic layer deposition, 14 laser ablation, 15 however, these processes have been related to the utilization of hazardous chemicals, expensive equipment, and high production costs. 16 In order to protect the environment, green methods syntheses have been developed as friendly and safe alternatives for the NPs semiconductors synthesis; these processes involve the use of plants, microorganisms, and algae instead of chemicals, and without using sophistic equipment.…”

mentioning

confidence: 99%

Synthesis of semiconductor ZnO nanostructures using Arctostaphylos pungens extract applicated in the photodegradation of water pollutions

Quevedo-Robles

Luque

2023

Env Prog and Sustain Energy

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The presence of dyes in water can have severe health and environmental implications; consequently, effective technologies are required to remove them. In this research, ZnO nanoparticles (NPs) have been synthesized by eco‐friendly methods, using Arctostaphylos pungens extract, for use in water treatment via photocatalysis. The extract concentration strongly influenced the properties of ZnO NPs, the bandgap values revealed a direct dependence as the extract concentration increased, obtaining 2.81, 2.88, and 2.92 eV for 1%, 2%, and 4% w/v (weight/volume), respectively. In contrast, the NPs presented quasi‐spherical morphologies with a decrease in size from 24, 20, and 17 nm in response to extract concentration variations. The ZnO formation was confirmed by Fourier transform infrared, energy‐dispersive x‐ray, and x‐ray diffraction. ZnO NPs showed high photocatalytic activity with the dyes methylene blue (MB) and methyl orange (MO) under UV light, achieving 96% photodegradation of MB in just 60 min. Meanwhile, MO showed 93% of degradation at 180 min. Additionally, under solar radiation, significant photocatalytic activity was also observed, obtaining 92% and 81% photodegradation for MB and MO, respectively. The results indicate that ZnO NPs green synthesized using A. pungens extract can be used in water treatment as a friendly and efficient catalyst for the photodegradation of dyes.

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Solvothermal synthesis of ZnO spheres: Tuning the structure and morphology from nano- to micro-meter range and its impact on their photocatalytic activity

Cited by 26 publications

References 51 publications

Synthesis of Dielectric Nanospheres with Moderate‐Refractive‐Index and Applications in Photon Manipulating

Synthesis of Dielectric Nanospheres with Moderate‐Refractive‐Index and Applications in Photon Manipulating

ZnO Nanorods Grown on Rhombic ZnO Microrods for Enhanced Photocatalytic Activity

Synthesis of semiconductor ZnO nanostructures using Arctostaphylos pungens extract applicated in the photodegradation of water pollutions

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