Surface nano-texturing of silicon by picosecond laser irradiation through TiO2 nanotube arrays

Babu, K.E. Sarath Raghavendra; Duraiselvam, Muthukannan

doi:10.1016/j.apsusc.2015.07.015

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…The use of photo-degradation to remove organic pollutants has attracted attention as an alternative approach in solving environmental problems and pollution control, as compared to other physical, chemical, and biological technologies [1,2]. Among the many candidate materials systems for photo-catalysis, TiO 2 has been the most promising candidate due to its good physical and chemical stability, low cost, superior photocatalytic performance and environmental friendliness [3,4]. However, due to the wide band gap of this material (3.2 eV), it will only absorb a narrow range of the solar spectrum and this leads to a low photocatalytic efficiency which is a concern for its practical application in photocatalytic decontamination [5].…”

Section: Introductionmentioning

confidence: 99%

Aligned macroporous TiO2/chitosan/reduced graphene oxide (rGO) composites for photocatalytic applications

Chen

Zhang

Zeng

et al. 2017

Applied Surface Science

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In this paper ice templating is used to fabricate novel TiO 2 /chitosan/reduced graphene oxide (rGO) composites with a highly aligned macroporous structure for photocatalytic applications. The structure of the composites was readily tailored using the composite composition, for example the lamellar pore width decreased from 50-45 µm to 5-10 µm, while the lamellar thickness increased from 2-3 to 20-25 µm, with an increase of the TiO 2 content from 45 to 77 vol.%. Lamellar pore channels between the layers exhibited a more uniform distribution when the rGO content was 1.0 wt.%. The increase in viscosity of the composites with high TiO 2 contents led to the formation of smaller ice crystals and smaller lamellar pore sizes to enable the production of composite structures with improved mechanical strength. The TiO 2 /chitosan/rGO composites exhibited excellent photocatalytic degradation of methyl orange and the photocatalytic efficiency was optimized by control of the active material content and microstructure. The hybrid composites with 1.0 wt.% rGO showed a degradation percentage of 97%, which makes these novel TiO 2 /chitosan/rGO freeze cast structures attractive materials as high performance and high strength substrates for photocatalytic degradation applications.

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