Effects of hydrogen annealing on the microstructure and optical properties of single-phased Ag2O film deposited using direct-current reactive magnetron sputtering

Gao, Xiaoyong; Zhao, Mingshan; Zhang, Zengyuan; Chen, Chao; Ma, Jiangang; Lu, Jingxiao

doi:10.1016/j.tsf.2011.04.028

Cited by 19 publications

(7 citation statements)

References 12 publications

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“…The occurrence of a small amount of silver oxide (Ag 2 O) in the samples suggested that at the calcination temperature around 200 °C, thermal decomposition of AgNO 3 into Ag 2 O was observed in the main process of decomposition of AgNO 3 into Ag metallic via Ag 2 O. Gao et al reported that the thermal decomposition of Ag 2 O phases to Ag and oxygen atoms transpires at T a ≥ 200 °C [ 40 ]. Even though, the Ag-O bonding in Ag 2 O is much weaker than Ag-Ag bonding in Ag lattice at 200°C, there is a possibility of small amounts of Ag 2 O remaining from the decomposition of AgNO 3 [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

Feasibility of Silver Doped TiO2/Glass Fiber Photocatalyst under Visible Irradiation as an Indoor Air Germicide

Pham

Lee

2014

IJERPH

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This study investigated the feasibility of using Ag-TiO2 photocatalyst supported on glass fiber (Ag-TiO2/GF) prepared by a sol-gel method as an indoor air germicide. An experimental model was designed to investigate the bacterial disinfection efficiency of Staphylococcus (Staph), the most popular bacterium in hospitals in Korea, by the Ag-TiO2/GF photocatalyst. The silver content in Ag/TiO2 was altered from 1 to 10% to investigate the optimal ratio of Ag doped on TiO2/glass fiber (TiO2/GF) for photocatalytic disinfection of Staph. This study confirmed that Ag in Ag-TiO2/GF could work as an electron sink or donor to increase photocatalytic activity and promote the charge separation of electron-hole pairs generated from TiO2 after photon absorption. Ag also acts as an intermediate agent for the transfer of photo-generated electrons from the valence band of TiO2 to an acceptor (O2 gas) to promote photo-oxidation processes. The photocatalytic disinfection activity of Ag-TiO2/GF under visible light increased with the increase in silver content up to 7.5% and then slightly decreased with further increasing silver content. The highest disinfection efficiency and disinfection capacity of Staph using 7.5% Ag-TiO2/GF were 75.23% and 20 (CFU∙s−1∙cm−2) respectively. The medium level of humidity of 60% ± 5% showed better photocatalytic disinfection than the lower (40% ± 5%) or higher (80% ± 5%) levels.

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Section: Resultsmentioning

confidence: 99%

Feasibility of Silver Doped TiO2/Glass Fiber Photocatalyst under Visible Irradiation as an Indoor Air Germicide

Pham

Lee

2014

IJERPH

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“…Therefore, the properties of several metal oxides such as ZnO [34,35], TiO 2 [36,37], HfO 2 [38], Ag 2 O [39] and SnO 2 [40] have been investigated under hydrogen annealing. Recently, the effect of hydrogen treatment on WO 3 nanostructures was investigated for various applications.…”

Section: Introductionmentioning

confidence: 99%

Influence of hydrogen annealing on the optoelectronic properties of WO3 thin films

Saleem

Al-Kuhaili

Durrani

et al. 2015

International Journal of Hydrogen Energy

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“…The nucleation of silver at this interface is considered as rate‐determining step for reactions with ethylene as reducing agent . For the reduction with hydrogen as reactant gas, a dissociation of hydrogen molecules at the Ag 2 O surface was mentioned as one step in the process .…”

Section: Introductionmentioning

confidence: 99%

Morphology and size effects on the reduction of silver oxide by hydrogen

Schimo

Kreuzer

Hassel

2015

Physica Status Solidi (a)

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The dependence of reactivity towards hydrogen on size and morphology was studied for silver oxide Ag2O microparticles. Morphological tuning of the microparticles, which appeared in a size range from 340 to 1400 nm, was achieved in a wet‐chemical synthesis approach. Thermogravimetric measurements allowed the determination of onset temperatures and reaction rates for reduction with gaseous hydrogen as reducing agent. The results reveal the high complexity of the Ag2O reduction process, on which both the surface to volume ratio as well as the facet dependent activity of the morphologies have great influence. Differential scanning calorimetry was employed to study reduction by hydrogen, desorbing from a hydrogen‐loaded palladium foil, showing great effect of contact area size on the reactivity.

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Effects of hydrogen annealing on the microstructure and optical properties of single-phased Ag2O film deposited using direct-current reactive magnetron sputtering

Cited by 19 publications

References 12 publications

Feasibility of Silver Doped TiO2/Glass Fiber Photocatalyst under Visible Irradiation as an Indoor Air Germicide

Feasibility of Silver Doped TiO2/Glass Fiber Photocatalyst under Visible Irradiation as an Indoor Air Germicide

Influence of hydrogen annealing on the optoelectronic properties of WO3 thin films

Morphology and size effects on the reduction of silver oxide by hydrogen

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