Photocatalytic activity of WO3/Fe2O3 nanocomposite photoanode
MetadataShow full item record
The (WO3)1−x–(Fe2O3)x (0 ≤ x ≤ 1) nano-particle thin films with various compositions have been deposited onto the fluorine thin oxide (FTO) coated glass substrate using sol-gel, spin-coating technique. An electrode/electrolyte interface has been formed between an n-type (WO3)1−x–(Fe2O3)x composite semiconductor and a 0.5 mol L−1 Na2SO4 aqueous solution. The photo-catalytic activity of the films has been investigated through the photocurrent-voltage. UV-visible spectroscopy, SEM and XRD have been used to characterize solar absorption, surface morphology and the crystallinity of samples, respectively. The photo-electrochemical (PEC) experiments were performed under solar irradiation to evaluate the amount of electron-hole generation in different samples. All the composite nano-particles indicated higher efficiency compared to pristine iron and tungsten oxides. A clear relationship was also confirmed between band gap energy and photo-catalytic activity of thin films. The band-gap energy of mixed thin films decreased linearly with the increasing Fe2O3 content in the film samples. The maximum photocurrent density of 2.34 mA cm−2 has been obtained for sample with x = 0.25 at 1.4 V vs. RHE. The result revealed that the sample also has the highest photon-to-current efficiency (0.87%), and solar absorption.
Showing items related by title, author, creator and subject.
Memar, Amir; Phan, Chi; Tade, Moses (2012)Fe2O3 nanostructures photoanodes were prepared via sol-gel spin-coating method onto fluorine-doped tin oxide glass substrates using six different surfactants: polyethylene glycol (PEG-300), Triton X-100, pluronic F127, ...
Ant (Hymenoptera: Formicidae) diversity influenced by tree thinning in the Western Australian jarrah (Eucalyptus marginata) forestHeterick, Brian E.; Majer, Jonathan; Kabay, E.; Loh, M. (2015)The Western Australian Water Corporation has trialled a catchment – management program in the northern jarrah forest as a possible means of enhancing water runoff and yield. Thinning has been performed by chemical injection ...
Rajaeian, Babak (2012)Thin film composite (TFC) membranes have long been used by many large-scale applications (i.e., water and wastewater treatment). Recently, conventional polymeric TFC membranes are facing with short longevity due to high ...