Hydrothermal preparation of ZnO-reduced graphene oxide hybrid with high performance in photocatalytic degradation

Zhou, Xun; Shi, Tiejun; Zhou, Haijun

doi:10.1016/j.apsusc.2012.02.131

Cited by 275 publications

(108 citation statements)

References 19 publications

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“…4b, the concentration of rhodamine B (RhB) did not change over 180 min in the absence of the ZnO photocatalyst, which indicated that the catalyst was essential for efficient photodegradation (Zhao et al 2013). It was also clear that the RhB concentration changed remarkably during the pre-absorption with the UV light off, which may have been due to the large ZnO surface area for the adsorption of RhB (Zhou et al 2012). When the UV light was switched on, the photocatalytic reaction was initiated, and the RhB concentration decreased greatly.…”

Section: Uv-visible Diffuse Reflection Spectroscopymentioning

confidence: 79%

Preparation of Flower-like ZnO Nanoparticles in a Cellulose Hydrogel Microreactor

Qin

Jiang

et al. 2017

BioResources

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*Flower-like zinc oxide (ZnO) nanoparticles were synthesized with sodium hydroxide and zinc acetate in a cellulose hydrogel microreactor (prepared by the inversion method). The samples were characterized by scanning electron microscopy, EDX, x-ray diffractometry, ultravioletvisible diffuse reflection spectroscopy, and nitrogen adsorptiondesorption. The results indicated that ZnO grows in a flower-like shape in the pores of the cellulose hydrogel. The pure hexagonal wurtzite structures have uniform diameters in the range of 10 nm to 30 nm, surface areas of 39.18 m 2 /g, and pore volumes of 0.2109 cm 3 /g. This study also investigated the photocatalytic properties. The nanoparticles have a band gap of 3.23 eV and a 95.2% efficiency for the ultraviolet degradation of rhodamine B over 3 h at room temperature.

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Section: Uv-visible Diffuse Reflection Spectroscopymentioning

confidence: 79%

Preparation of Flower-like ZnO Nanoparticles in a Cellulose Hydrogel Microreactor

Qin

Jiang

et al. 2017

BioResources

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“…Ever since Fujishima and Honda reported TiO 2 photochemical electrode for splitting water in 1972 [6], the study on the development of photocatalysts used for the hydrogen production and the utilization of solar energy has attracted increasing attention [7,8]. The reported photocatalyst systems, to the best of our knowledge, can be generally classified as oxides (TiO 2 , ZnO, NiO) [9][10][11], sulfides (CdS, ZnS) [12,13], and halides (AgCl, AgBr) [14,15]. However, among these semiconductors, TiO 2 is considered as an excellent photocatalyst for hydrogen production due to its nontoxicity, stability, low price and resistance to chemicals and photochemical corrosion [16][17][18][19].…”

Section: Introductionmentioning

confidence: 98%

The enhanced photocatalytic activity of Zn2+ doped TiO2 for hydrogen generation under artificial sunlight irradiation prepared by sol–gel method

Wang

Yun

et al. 2014

J Sol-Gel Sci Technol

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Novel Zn 2? doped TiO 2 photocatalysts were synthesized by a simple sol-gel method. X-ray diffraction, UV-Vis diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma optical emission spectrometry, Brunauer-EmmettTeller method and Photoluminescence spectra were employed to examine the phase structure, morphology and optical properties of the synthesized samples. Their photocatalytic activities were evaluated by spitting water under artificial sunlight irradiation. In contrast with pure TiO 2 , the Zn 2? -TiO 2 samples showed enhanced photocatalytic properties. When TiO 2 was doped with 1 wt% Zn 2? , it showed the optimal photocatalytic activity with the amount of hydrogen evolution of 180 lmol h -1 , which was as about seven times as that for pure TiO 2 . For the Zn 2? -TiO 2 , Zn 2? can improve the separation ratio of photoexcited electrons-holes and leads to the high photocatalytic activity of TiO 2 .

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“…Li et al [29] prepared rGO/potassium niobate composite nanoscrolls as a photocatalyst, which showed high photocatalytic activity for dye degradation. Furthermore, using rGO as support material to enhance the photocatalytic activity of ZnO has been discussed intensively [30][31][32][33][34][35]. Some reports have also discussed synergetic effects of the metal and rGO in the process of photocatalytic [7,36].…”

Section: +mentioning

confidence: 99%

“…After that, the electron is trapped by absorbed O 2 from the air to become the O 2-, and the water captures the hole to produce the •OH, which is the major series for the degradation of organic contamination. These free radicals can degrade the organic contamination as CO 2 and H 2 O, due to its strong oxidability [46]. Once the adsorption-desorption equilibrium of MB on the photocatalyst surface is broken, the nearby MB is adsorbed immediately to reach a new equilibrium.…”

Section: +mentioning

confidence: 99%

Synthesis, Characterization and Photocatalytic Activity of Reduced Graphene Oxide-Ce/ZnO Composites

Zhang¹,

Zhao²,

Zou³

2016

Korean Chemical Engineering Research

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− A series of Ce-doped ZnO (Ce/ZnO) nanostructures were fabricated using the co-precipitation method, then a simply nontoxic hydrothermal approach was proposed for preparation of reduced graphene oxide (rGO)-Ce/ZnO composites. The synthesized composites were investigated by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), photoluminescence spectroscopy (PL), electrochemical impedance spectroscopy (EIS), UV-vis diffuse reflectance spectroscopy (DRS) techniques and Raman pattern. The as-synthesized rGO-Ce/ZnO composites showed high photodecomposition efficiency in comparison with the rGO-ZnO, Ce/ZnO, pure ZnO under UV, visible-light and sunlight irradiation. The degradation of methylene blue (MB) (10 mg/L, 100ml) by 95.8% within 60 min by using rGO-2 (10 mg) under sunlight irradiation was observed. The repeated use of the rGO-2 was investigated, and the results showed almost no decay in the catalytic activity.

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Hydrothermal preparation of ZnO-reduced graphene oxide hybrid with high performance in photocatalytic degradation

Cited by 275 publications

References 19 publications

Preparation of Flower-like ZnO Nanoparticles in a Cellulose Hydrogel Microreactor

Preparation of Flower-like ZnO Nanoparticles in a Cellulose Hydrogel Microreactor

The enhanced photocatalytic activity of Zn2+ doped TiO2 for hydrogen generation under artificial sunlight irradiation prepared by sol–gel method

Synthesis, Characterization and Photocatalytic Activity of Reduced Graphene Oxide-Ce/ZnO Composites

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