Strainer-Separable TiO2 on Halloysite Nanocomposite-Embedded Alginate Capsules with Enhanced Photocatalytic Activity for Degradation of Organic Dyes

Lee, Jewon; Seong, Sicheon; Jin, Soyeong; Kim, Jae-Yong; Jeong, Youngdo; Noh, Jaegeun

doi:10.3390/nano12142361

Cited by 5 publications

(2 citation statements)

References 42 publications

(46 reference statements)

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“…We analyzed the nanocomposites’ structure using XRD, Raman spectroscopy, FT-IR, and EDX-TEM. To evaluate the photocatalytic performance, we selected rhodamine b (RB) as the model organic dye, as its degradation can be easily monitored through fluorescence [ 44 , 45 , 46 ]. Under UV light irradiation, we compared the photocatalytic activity of RB when mixed with ZnO, ZnO@HNTs, ZnO/GO, and ZnO/GO@HNTs.…”

Section: Introductionmentioning

confidence: 99%

ZnO/Graphene Oxide on Halloysite Nanotubes as a Superabsorbent Nanocomposite Photocatalyst for the Degradation of Organic Dyes

Park

Lee

et al. 2023

Nanomaterials

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Using renewable photocatalysts for pollutant degradation represents a promising approach to addressing environmental water challenges by harnessing solar energy without additional energy consumption. However, for the practical use of photocatalysts, it is necessary to improve catalyst efficiency, considering cost and biocompatibility. In this study, we developed a new superabsorbent photocatalyst for the degradation of organic dyes in water. Our photocatalyst comprises halloysite nanotubes (HNTs) with a large outer diameter and Si-O and Al-O groups on the outer and inner surfaces, respectively; graphene oxide (GO) possessing numerous sp2 bonds and light-conductive properties; and ZnO, which can degrade organic molecules via a photon source. By exploiting the superabsorbent properties of GOs for organic dyes and stabilizing ZnO nanoparticles on HNTs to inhibit aggregation, our photocatalysts demonstrated significantly improved degradability compared to ZnO nanoparticles alone and combinations of ZnO with HNTs or GO. The structural characteristics of the nanocomposites were characterized using SEM, EDX, Raman spectroscopy, and XRD. Their enhanced photocatalytic activity was demonstrated by the degradation of rhodamine b in water, showing 95% photodegradation under UV illumination for 60 min, while the ZnO nanoparticles showed only 56% dye degradation under the same condition. Additionally, the degradation rate was enhanced by four times. Furthermore, the catalysts maintained their initial activity with no significant loss after four uses, showing their potential for practical implementation in the mass purification of wastewater.

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Section: Introductionmentioning

confidence: 99%

ZnO/Graphene Oxide on Halloysite Nanotubes as a Superabsorbent Nanocomposite Photocatalyst for the Degradation of Organic Dyes

Park

Lee

et al. 2023

Nanomaterials

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“…For example, the visible-light active N-doped TiO 2 photocatalyst composite was used in [7], and copper-modified titania-based photocatalysts were applied in [8] for efficient hydrogen production. Also, photocatalysts show promising results in the decomposition of organic dyes, such as methylene blue or rhodamine B, as shown in [9,10]. Electrocatalytic nanocomposites, on the other hand, facilitate electrochemical reactions by providing efficient charge transfer pathways, as shown in [11] for MnCo 2 O 4 /NiCo 2 O 4 /rGO and [12] for ZrO 2 /NiO/rGO systems.…”

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confidence: 99%