Plasmonic resonance nature of Ag-Cu/TiO 2 photocatalyst under solar and artificial light: Synthesis, characterization and evaluation of H 2 O splitting activity

Kumar, Mandari Kotesh; Bhavani, K.; Gutta, Naresh; Srinivas, B.; Venugopal, A.

doi:10.1016/j.apcatb.2016.06.050

Cited by 92 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To further increase the photoactivity of TiO 2 , modification of the oxide surface by non-noble metals, such as copper or nickel, has been coupled with noble metal (i.e., Au, Pt, Ag) NPs deposition, attaining remarkable improvement in terms of photocatalytic hydrogen production rates and efficiency in solar light exploitation [14][15][16][17][18]. In this context, synergistic effects in photoactivity have been demonstrated in the case of copper-platinum co-modified TiO 2 when small amounts of Cu were deposited together with Pt NPs, under both aerobic [19] and anaerobic conditions [20,21].…”

Section: Introductionmentioning

confidence: 99%

Flame-Made Cu/TiO2 and Cu-Pt/TiO2 Photocatalysts for Hydrogen Production

et al. 2017

View full text Add to dashboard Cite

The effect of Cu or Cu-Pt nanoparticles in TiO 2 photocatalysts prepared by flame spray pyrolysis in one step was investigated in hydrogen production from methanol photo-steam reforming. Two series of titanium dioxide photocatalysts were prepared, containing either (i) Cu nanoparticles (0.05-0.5 wt%) or (ii) both Cu (0 to 0.5 wt%) and Pt (0.5 wt%) nanoparticles. In addition, three photocatalysts obtained either by grafting copper and/or by depositing platinum by wet methods on flame-made TiO 2 were also investigated. High hydrogen production rates were attained with copper-containing photocatalysts, though their photoactivity decreased with increasing Cu loading, whereas the photocatalysts containing both Cu and Pt nanoparticles exhibit a bell-shaped photoactivity trend with increasing copper content, the highest hydrogen production rate being attained with the photocatalyst containing 0.05 wt% Cu.

show abstract

Section: Introductionmentioning

confidence: 99%

Flame-Made Cu/TiO2 and Cu-Pt/TiO2 Photocatalysts for Hydrogen Production

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Nowadays, many TiO 2 -based photocatalyst materials and products are based on Ag-TiO 2 . [11][12][13] Human will inevitably be exposed to Ag-TiO 2 nanocomposites through inhalation because of their potential wide application in environment purification and surface self-cleaning. 1,2,14 However, what happens to the toxicity of photocatalysts after silver doping is still unknown.…”

mentioning

confidence: 99%

Influence of silver doping on pro‐inflammatory and pro‐fibrogenic effects of nano‐titanium dioxide in murine lung

Huang,

Li,

Wei

et al. 2023

Environmental Toxicology

View full text Add to dashboard Cite

Silver is usually loaded on nano‐titanium dioxide (TiO2) through photodeposition method to enhance visible‐light catalytic functions for environment purification. However, little is known about how the toxicity changes after silver doping and how the physicochemical properties of loaded components affect nanocomposite toxicity. In this study, Ag‐TiO2 with different sizes and contents of silver particles were obtained by controlling photodeposition time (PDT) and silver addition amount. Pro‐inflammatory and pro‐fibrogenic responses of these photocatalysts were evaluated in male C57BL/6J murine lung. As a result, silver was well assembled on TiO2, promoting visible‐light catalytic activity. Notably, the size of silver particles increased with PDT. Meanwhile, toxicity results showed that pure TiO2 (P25) mainly caused neutrophil infiltration, while 2 wt/wt% silver‐loaded TiO2 recruited more types of inflammatory cells in the lung. Both of them caused the increase of proinflammatory cytokines while decreasing the anti‐inflammatory cytokine in bronchoalveolar lavage fluid. However, 2 wt/wt% silver doping also accelerated the lung pro‐fibrogenic response of photocatalysts in the subacute phase from evidence of collagen deposition and hydroxyproline concentrations. Mechanistically, the overactivation of TGFBR2 receptors in TGF‐β/smads pathways by silver‐loaded TiO2 rather than pure TiO2 may be the reason why silver‐loaded TiO2 can promote pro‐fibrogenic effect response. Intriguingly, the increased toxicity caused by silver doping can be rescued by increasing the size of the loaded silver or decreasing the silver amount. These results may be important for the new understanding of the toxicity of TiO2‐based photocatalysts.

show abstract

Surface Plasmonic‐Assisted Photocatalysis and Optoelectronic Devices with Noble Metal Nanocrystals: Design, Synthesis, and Applications

Zada

Muhammad

Ahmad

et al. 2019

Adv Funct Materials

218

134

View full text Add to dashboard Cite

The surface plasmon resonance (SPR) of noble metals is known to improve the efficiency of various processes and devices. The photocatalytic process is the production of fuels and storage of solar photons in chemical bonds without imposing harmful threats to the environment. Photovoltaics are other devices utilizing solar energy for electrical energy. Similarly, other optoelectronic devices like photodetectors absorb photons and convert it into charges via electron–hole dissociation processes. In contrast, light‐emitting optoelectronic devices work based on the phenomenon of charge recombination to produce light. All these devices, however, have efficiency limitations, which impede the application of novel functional materials in these devices. A more direct approach is the utilization of noble metals and their complexes, which significantly enhance the efficiencies of these devices by SPR. This article highlights recent works and applications of noble metals by SPR‐enhanced photocatalysis for hydrogen evolution from water, CO2 conversion into useful compounds, and oxidation of hazardous pollutants. In addition, the plasmon‐enhancement of optoelectronic devices is summarized. Several possible mechanisms that have been previously reported in the literature are discussed in this work, with particular emphasis on different features of these mechanisms involving devices that are not highlighted and therefore need more attention.

show abstract

Plasmonic resonance nature of Ag-Cu/TiO 2 photocatalyst under solar and artificial light: Synthesis, characterization and evaluation of H 2 O splitting activity

Cited by 92 publications

References 58 publications

Flame-Made Cu/TiO2 and Cu-Pt/TiO2 Photocatalysts for Hydrogen Production

Flame-Made Cu/TiO2 and Cu-Pt/TiO2 Photocatalysts for Hydrogen Production

Influence of silver doping on pro‐inflammatory and pro‐fibrogenic effects of nano‐titanium dioxide in murine lung

Surface Plasmonic‐Assisted Photocatalysis and Optoelectronic Devices with Noble Metal Nanocrystals: Design, Synthesis, and Applications

Contact Info

Product

Resources

About