Enhanced photocatalytic activity in anodized WO3-loaded TiO2 nanotubes

Nazari, Mohammad Reza; Golestani‐Fard, F.; Bayati, R.; Eftekhari-yekta, B.

doi:10.1016/j.spmi.2014.12.008

Cited by 29 publications

(8 citation statements)

References 23 publications

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“…Lowering the band gap of TiO 2 can be done through creation of heterostructure with narrow gap materials or doping with various materials. It has been reported that WO 3 increase of absorption in VIS region as shown by various research papers [19,[24][25][26][27][28].…”

mentioning

confidence: 91%

Nanostructured TiO2-based materials with photocatalytic properties

Knoks¹,

Grīnberga²,

Kleperis³

et al. 2019

Nanostructured Composite Materials for Energy Storage and Conversion: Collection of Articles

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In order to reduce global climate change by limiting CO 2 emissions, it is necessary to switch from continuous power production by burning fossil fuels (coal, oil, gas) to the unsteady energy generation from local renewable energy sources. Wind, sun and rivers are the most popular renewable energy sources, but they are available occasionally or seasonally, which doesn't always coincide with required consumption. It is especially important for countries in Northern latitudes with dark and short days in winter, and sunny, long days in summer, like Latvia. Therefore, reliable energy storage systems are critically needed to store and supply power in continuous manner. Electricity and hydrogen are two comparable energy carriers, and in order to be able to meet humanity's demand for energy storage in the form of electricity and/or hydrogen, appropriate materials are researched [1]. In hydrogen economics, the production of hydrogen from renewables is very important. TiO 2 has attracted high interest of industry and scientific communities. Following the discovery by Honda and Fujishima [2] of TiO 2 photocatalytic properties, it has been used

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mentioning

confidence: 91%

Nanostructured TiO2-based materials with photocatalytic properties

Knoks¹,

Grīnberga²,

Kleperis³

et al. 2019

Nanostructured Composite Materials for Energy Storage and Conversion: Collection of Articles

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“…Anodization of TiO 2 and EPD of WO 3 are time and cost-effective methods, providing high photochemical stability and usage of non-toxic materials. The potential of WO 3 deposition and secondary treatment must be understood for successful TiO 2 /WO 3 system description [15], [23]. Single-step Ti anodization with simultaneous incorporating of WO 3 microcrystalline powder was tested by pouring WO 3 into an electrolyte and mixing with a magnetic stirrer during the anodization process.…”

Section: Introductionmentioning

confidence: 99%

WO₃ as Additive for Efficient Photocatalyst Binary System TiO₂/WO₃

Knoks

Kleperis

Bajārs

et al. 2021

Latvian Journal of Physics and Technical Sciences

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Two different methods of synthesis of TiO2/WO3 heterostructures were carried out with the aim to increase photocatalytic activity. In this study, anodic TiO2 nanotube films were synthesized by electrochemical anodization of titanium foil. WO3 particles were applied to anodic Ti/TiO2 samples in two different ways – by electrophoretic deposition (EPD) and insertion during the anodization process. Structural and photocatalytic properties were compared between pristine TiO2 and TiO2 with incorporated WO3 particles. Raman mapping was used to character-ise the uniformity of EPD WO3 coating and to determine the structural composition. The study showed that deposition of WO3 onto TiO2 nanotube layer lowered the band gap of the binary system compared to pristine TiO2 and WO3 influence on photo-electrochemical properties of titania. The addition of WO3 increased charge carrier dynamics but did not increase the measured photo-current response. As the WO3 undergoes a phase transition from monoclinic to orthorhombic at approximately 320 ℃ proper sequence WO3 deposition could be beneficial. It was observed that secondary heat treatment of WO3 lowers the photocurrent.

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“…Until the present, various techniques have been proposed to synthetize hybrid TiO2-WO3 nanostructures, such as sol-gel method, hydrothermal, anodization, wet impregnation, radiofrequency spraying, etc. [33]. In this study the fabrication of hybrid nanostructures will be carried out by electrochemical anodization of TiO2 and subsequent WO3 electrodeposition.…”

Section: Introductionmentioning

confidence: 99%