Preparation of TiO2/AgNPs by photodeposition method using Ag(I) present in radiophotography wastewater and their antibacterial activity in visible light illumination

Wahyuni, Endang Tri; Roto, R.; Novarita, D.; Suwondo, Kusuma Putri; Kuswandi, Bambang

doi:10.1016/j.jece.2019.103178

Cited by 14 publications

(10 citation statements)

References 15 publications

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“…Consequently, the contact opportunity between UV light and Ag + decreased, thereby decreasing the amount of Ag(I) reduced. [8,12]. The spectra for all TiO2/AgNPs samples showed similar peaks with some observable shifts.…”

Section: ■ Results and Discussionmentioning

confidence: 74%

“…Various irradiation times (1-10 h) were carried out in this research. At more than 5 h of irradiation, the antifungal activity was no longer dependent on the time irradiation, due to the saturation of the photocatalyst solution which resulted in an inefficient absorption of light [8]. Meanwhile, the irradiation time of 1 and 2 h were observed as well, yet there was no inhibition zone at all.…”

Section: Antifungal Activity Of Tio2 and Tio2/agnps Under Visible And Uv Lightmentioning

confidence: 99%

“…A set of the photoreduction apparatus with UV Lamp (Black Light Blue 40 W, 220 V, intensity = 0.040 lx) was used for TiO2/Ag preparation by following the procedure previously reported [8]. Atomic Absorption Spectroscopy/AAS (Perkin-Elmer type 3110), Infra-Red/IR (Shimadzu Prestige 21), Specular Reflectance Ultra Violet/SRUV (Pharmaspec UV 1700), Transmission Electron Microscopy/TEM (JEOL JEM-1400), SEM-EDX (JEOL JSM-6510LA) and X-ray Diffraction/XRD (Shimadzu 6000D) machines were applied for the analysis and characterization of the photocatalyst products.…”

Section: Instrumentationmentioning

confidence: 99%

“…This meant that 0.5 g/L was the ideal dose in this experiment. At a dose of 0.1 g/L, there was no inhibition zone, but at higher doses (0.3-1 g/L) the antifungal activity was independent of the catalyst concentration, due to the screening effect produced by the excess of suspended particles which resulted in an inefficient absorption of light by the photocatalyst [8,21].…”

Section: Antifungal Activity Of Tio2 and Tio2/agnps Under Visible And Uv Lightmentioning

confidence: 99%

“…Ag-doped TiO2 has been proven to increase TiO2 activity in the visible region by the photoreduction method [7]. Radiophotography wastewater has been reported as a cheap source of Ag(I) that contains [Ag(S2O3)2] 3- [8]. The effort to replace expensive AgNO3 as an Ag precursor, as well as to convert the toxic [Ag(S2O3)2] 3in wastewater into more valuable material, is proposed in this work.…”

Section: ■ Introductionmentioning

confidence: 99%

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Antifungal Activity of TiO<sub>2</sub>/Ag Nanoparticles under Visible Light Irradiation

2020

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The doping of TiO2 by Ag(I) from [Ag(S2O3)2]3– contained in radiophotography wastewater by photoreduction method has been performed. TiO2/AgNPs photocatalyst was examined for its activity as an antifungal material for the inhibition of C. albicans in water under visible light irradiation. In the doping process, the weight of TiO2 was varied to obtain TiO2/AgNPs with different amounts of Ag. The TiO2/AgNPs samples were characterized by using FTIR, SRUV, TEM, SEM-EDX, and XRD methods. The antifungal test was carried out by disc diffusion method under visible light irradiation, wherein the amount of Ag-doped on TiO2, the dose of TiO2/AgNPs, and the irradiation time were optimized. The research results indicated that the antifungal activity of TiO2/AgNPs in inhibiting C. albicans has been successfully prepared. The highest inhibition was achieved by using 0.5 g/L of TiO2/AgNPs (I), at 5 h of irradiation time.

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Section: ■ Results and Discussionmentioning

confidence: 74%

Section: Antifungal Activity Of Tio2 and Tio2/agnps Under Visible And Uv Lightmentioning

confidence: 99%

Section: Instrumentationmentioning

confidence: 99%

Section: Antifungal Activity Of Tio2 and Tio2/agnps Under Visible And Uv Lightmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Antifungal Activity of TiO<sub>2</sub>/Ag Nanoparticles under Visible Light Irradiation

2020

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Photodeposition‐Based Synthesis of TiO₂@IrO_x Core–Shell Catalyst for Proton Exchange Membrane Water Electrolysis with Low Iridium Loading

Hoffmeister,

Finger,

Fiedler

et al. 2024

Advanced Science

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The widespread application of green hydrogen production technologies requires cost reduction of crucial elements. To achieve this, a viable pathway to reduce the iridium loading in proton exchange membrane water electrolysis (PEMWE) is explored. Herein, a scalable synthesis method based on a photodeposition process for a TiO2@IrOx core–shell catalyst with a reduced iridium content as low as 40 wt.% is presented. Using this synthesis method, titania support particles homogeneously coated with a thin iridium oxide shell of only 2.1 ± 0.4 nm are obtained. The catalyst exhibits not only high ex situ activity, but also decent stability compared to commercially available catalysts. Furthermore, the unique core–shell structure provides a threefold increased electrical powder conductivity compared to structures without the shell. In addition, the low iridium content facilitates the fabrication of sufficiently thick catalyst layers at decreased iridium loadings mitigating the impact of crack formation in the catalyst layer during PEMWE operation. It is demonstrated that the novel TiO2@IrOx core–shell catalyst clearly outperforms the commercial reference in single‐cell tests with an iridium loading below 0.3 mgIr cm−2 exhibiting a superior iridium‐specific power density of 17.9 kW gIr−1 compared to 10.4 kW gIr−1 for the commercial reference.

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The Synthesis of a Novel Ternary Bi/Bi2WO6/Amorphous Bi4V2O11 Heterojunction Photocatalyst with Enhanced Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

Ri¹,

Hwang²,

Kim³

et al. 2022

Catal Lett

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Preparation of TiO2/AgNPs by photodeposition method using Ag(I) present in radiophotography wastewater and their antibacterial activity in visible light illumination

Cited by 14 publications

References 15 publications

Antifungal Activity of TiO<sub>2</sub>/Ag Nanoparticles under Visible Light Irradiation

Antifungal Activity of TiO<sub>2</sub>/Ag Nanoparticles under Visible Light Irradiation

Photodeposition‐Based Synthesis of TiO₂@IrO_x Core–Shell Catalyst for Proton Exchange Membrane Water Electrolysis with Low Iridium Loading

The Synthesis of a Novel Ternary Bi/Bi2WO6/Amorphous Bi4V2O11 Heterojunction Photocatalyst with Enhanced Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

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Preparation of TiO2/AgNPs by photodeposition method using Ag(I) present in radiophotography wastewater and their antibacterial activity in visible light illumination

Cited by 14 publications

References 15 publications

Antifungal Activity of TiO<sub>2</sub>/Ag Nanoparticles under Visible Light Irradiation

Antifungal Activity of TiO<sub>2</sub>/Ag Nanoparticles under Visible Light Irradiation

Photodeposition‐Based Synthesis of TiO2@IrOx Core–Shell Catalyst for Proton Exchange Membrane Water Electrolysis with Low Iridium Loading

The Synthesis of a Novel Ternary Bi/Bi2WO6/Amorphous Bi4V2O11 Heterojunction Photocatalyst with Enhanced Visible-Light-Driven Photocatalytic Reduction of Cr(VI)

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Photodeposition‐Based Synthesis of TiO₂@IrO_x Core–Shell Catalyst for Proton Exchange Membrane Water Electrolysis with Low Iridium Loading