Preparation of GO⁃Modified Cerium⁃Based Nano⁃Composite Photocatalyst and a Comparative Study on Photocatalytic Properties

doi:10.3969/j.issn.1006-396X.2022.01.010

Abstract

Abstract:

The UV shielding properties and photocatalytic properties of nanomaterials will vary due to the different surface binding energies of the materials themselves.Nano?zinc oxide (NPs?ZnO),nano?ceria (NPs?CeO₂), NPs?ZnO/CeO₂ and graphene oxide modified zinc oxide/ceria nanocomposites (NPs?ZnO/CeO₂@GO) were prepared,and the prepared samples were characterized by XRD,FT?IR,SEM,and the UV shielding properties and photocatalytic properties were tested. The results show that the UV shielding ability: NPs?ZnO<NPs?CeO₂<NPs?ZnO/CeO₂<NPs?ZnO/CeO₂@GO, the maximum degradation rate of methylene blue dye after 3 h treatment is:NPs?ZnO/CeO₂@GO(0.92)>NPs?ZnO(0.89)>NPs?ZnO/CeO₂(0.75))>NPs?CeO₂(0.66).Moreover,the photocatalytic activity of NPs?ZnO/CeO₂@GO is stronger than other photocatalysts participating in the experiments.

Key words: Zinc oxide, Cerium dioxide, Graphene(GO) modified, Nanocomposites, Photocatalysis

摘要：

纳米材料的紫外屏蔽性能及光催化性能会由于材料自身的表面结合能不同而不同。制备纳米氧化锌（NPs?ZnO）、纳米二氧化铈（NPs?CeO₂）、NPs?ZnO/CeO₂及氧化石墨烯改性氧化锌/氧化铈纳米复合材料(NPs?ZnO/CeO₂@GO)，并对制备样品进行了XRD、FT?IR、SEM等表征和紫外屏蔽性能及光催化性能测试研究。结果表明，紫外屏蔽能力：NPs?ZnO<NPs?CeO₂<NPs?ZnO/CeO₂<NPs?ZnO/CeO₂@GO，作用3 h后的亚甲基蓝染料的降解率大小顺序为：NPs?ZnO/CeO₂@GO（0.92）>NPs?ZnO（0.89）>ZnO/CeO₂（0.75）>NPs?CeO₂（0.66）；并且NPs?ZnO/CeO₂@GO的光催化性强于参与实验的其他光催化剂。

关键词: 氧化锌, 氧化铈, GO改性, 纳米复合材料, 光催化

CLC Number:

O643.36

Jiahui Chen, Honglin Li, Zikun Yang, Hongxian Luo, Jinsheng Zhang, Lihua Li. Preparation of GO⁃Modified Cerium⁃Based Nano⁃Composite Photocatalyst and a Comparative Study on Photocatalytic Properties[J]. Journal of Petrochemical Universities, 2022, 35(1): 63-67.

陈佳慧, 黎泓麟, 杨紫坤, 罗鸿仙, 张金生, 李丽华. GO改性的铈基纳米复合光催化剂性能对比研究[J]. 石油化工高等学校学报, 2022, 35(1): 63-67.

Figures/Tables 6

Fig.1 XRD profiles of the different nanomaterials

Fig.2 The FT?IR spectra of the GO

Fig.3 SEM plots of GO oxide and NPs?ZnO / CeO2@GO composite

Table 1 Absorbance of different nanomaterials?ethylene glycol dispersion systems at 320 nm

纳米氧化物	吸光度
纳米氧化物	第1次	第2次	第3次	平均
NPs⁃ZnO	0.468	0.465	0.462	0.465
NPs⁃CeO₂	0.683	0.682	0.681	0.682
NPs⁃ZnO/CeO₂	0.793	0.794	0.792	0.793
NPs⁃ZnO/ CeO₂@GO	1.216	1.215	1.223	1.218

Fig.4 Effect of UV photocatalyst mass on the degradation rate of methylene blue dye

Fig.5 Effect of the sample on RhB solution

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