AgCl-based selective laser melting photocatalytic module for degradation of azo dye and E. coli

Liu, Chao-Hwa; Huang, Chung-Ching; Lee, Po-Ching; Chen, Guan-Chen; Yang, Zhengrong; Lin, C. B.

doi:10.1007/s00170-021-07119-x

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…Oxygen vacancies, prevalent defects in oxide semiconductors, present potent strategies for regulating the charge separation process and manipulating the electronic structure of semiconductors [36][37][38][39][40][41]. Recently, it has been noted that these vacancies, also known as oxygen vacancy defects (ODs), can augment solar light harvesting in semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancies Defective La2Ti2O7 Nanosheets Enhanced Photocatalytic Activity of Hydrogen Evolution under Visible Light Irradiation

Wang,

Yu,

Liu

2023

Molecules

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A novel and efficient technique has been designed for the creation of oxygen vacancies on La2Ti2O7 (LTO) nanosheets. This is achieved via a controlled solid-state reaction between NaBH4 and LTO nanosheets. Transmission electron microscopy (TEM) analyses expose that these processed LTO specimens possess a unique crystalline core/amorphous shell structure, represented as La2Ti2O7@La2Ti2O7-x. According to X-ray photoelectron spectroscopy (XPS) observations, there is a notable correlation between the reaction time, temperature, and the concentration of oxygen vacancies. The concentration of these vacancies tends to increase along with the reaction time and temperature. Concurrently, UV-Visible spectra and photocatalytic tests reveal a significant impact of oxygen vacancies on the LTO surface on both light absorption and photocatalytic functionality. Most notably, the LTO nanosheets with engineered oxygen vacancies have demonstrated an exceptional photocatalytic capacity for hydrogen production under visible light. The maximal activity recorded was an impressive 149 μmol g−1 h−1, which is noticeably superior to the performance of the pristine La2Ti2O7.

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Section: Introductionmentioning

confidence: 99%

Oxygen Vacancies Defective La2Ti2O7 Nanosheets Enhanced Photocatalytic Activity of Hydrogen Evolution under Visible Light Irradiation

Wang,

Yu,

Liu

2023

Molecules

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“…McEvoy [11] found that AgX (Cl, Br) photocatalysts generated nano-Ag atomic clusters with favorable antibacterial activity through photoreduction; these clusters exhibited antibacterial and antiviral effects under dark and bright conditions. In a previous study, we used a selective laser melting technique to create a highly porous Ag@/AgCl photocatalytic structure that demonstrated excellent and rapid photocatalytic sterilization of Escherichia coli under visible and UV light irradiation, and the sterilization kinetics followed a secondorder reaction [12]. Trinh et al [13] determined that nano-Ag had a favorable sterilization effect on the activities of E. coli and Staphylococcus aureus.…”

Section: Introductionmentioning

confidence: 99%

In situ precipitation 3D printing of highly ordered silver cluster–silver chloride photocatalysts

Chen¹,

Huang²,

Lee³

et al. 2023

Int J Adv Manuf Technol

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In this study, a silver atomic cluster(Ag@)/silver chloride photocatalyst structure with high porosity and a highly ordered interconnected three-dimensional (3D) porous network was prepared through a novel insitu-precipitation 3D printing technique. Photocatalytic dye degradation and the sterilization of Escherichia coli under irradiation with visible light and ultraviolet light revealed that the photocatalyst structure had a strong degradation effect on the aqueous solutions of Orange II azo dye and methylene blue dye (both containing hydrogen peroxide) and that the kinetic properties were consistent with those of a pseudo-rst-order kinetics. E. coli was sterilized within a short period, and the kinetics followed those of pseudo-rst-order and hyperbolic kinetics. After ve repetitions of dye degradation, the degradation rates of the Orange II azo and methylene blue dyes were maintained at approximately 89.8% and 88.2%, respectively, which indicated that the prepared photocatalyst structure had high durability and reliability.

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“…Moreover, if there exist metal-support interactions, the catalytic performance of metal NPs can be enhanced [16,17]. Recently, AgCl is typically used as support for Ag NPs deposition, and it can raise the visible-light responsive photocatalytic performances by the separation of carriers [18][19][20][21]. However, generally it's di cult to control the morphology of Ag nanostructures deposited on AgCl.…”

Section: Introductionmentioning

confidence: 99%

Abnormal SPR-Mediated Photocatalytic Enhancement of Ag Nanocubes Covered by AgCl Ultra-thin Layer

Alves

Liu

et al. 2022

Plasmonics

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It was theoretically predicted that electric eld intensities generated by surface plasmon resonance (SPR) around plasmonic metallic nanostructures could be reduced after covered by wide bandgap semiconductor, thus worsening the SPR-mediated photocatalytic activities. However, we found that the Ag nanocubes (Ag NCs) covered by AgCl demonstrated an abnormal SPR-mediated catalytic enhancement. Herein the PATP-to-DMAB oxidization was used as a model reaction to explore the photocatalytic conversions. It was observed that the Ag NCs covered by AgCl ultra-thin layer (AgCl@Ag NCs) presented better photocatalytic activities than those of individual Ag NCs under 633 nm excitation. To reveal the mechanism behind the superior activities of AgCl@Ag NCs, the PATP-to-DMAB conversions were also carried out in ambient argon (Ar), in which AgCl@Ag NCs demonstrated signi cantly higher conversions. These results could be interpreted based on the separation of electron-hole pairs in AgCl through SPR effect of Ag, where the electrons in the valence band of AgCl were excited to the empty states of Ag, leaving holes in the semiconductor and resulting in the oxidation of PATP to DMAB. Thus our ndings may provide a novel way to enhance SPR-mediated photocatalytic activities on plasmonic metallic nanostructures by the cover of an ultra-thin layer of wide bandgap semiconductor.

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AgCl-based selective laser melting photocatalytic module for degradation of azo dye and E. coli

Cited by 5 publications

References 25 publications

Oxygen Vacancies Defective La2Ti2O7 Nanosheets Enhanced Photocatalytic Activity of Hydrogen Evolution under Visible Light Irradiation

Oxygen Vacancies Defective La2Ti2O7 Nanosheets Enhanced Photocatalytic Activity of Hydrogen Evolution under Visible Light Irradiation

In situ precipitation 3D printing of highly ordered silver cluster–silver chloride photocatalysts

Abnormal SPR-Mediated Photocatalytic Enhancement of Ag Nanocubes Covered by AgCl Ultra-thin Layer

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