Anodization of bismuth doped TiO2 nanotubes composite for photocatalytic degradation of phenol in visible light

Ali, Imran; Kim, Seu-Run; Kim, Sung-Pil; Kim, Jong‐Oh

doi:10.1016/j.cattod.2016.03.029

Cited by 60 publications

(11 citation statements)

References 41 publications

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“…The anodized films were then washed with distilled water using the ultrasonic cleaner (Model VGT-1012S/GT SONIC) for 15 min before being soaked in acetone for 10 min. After that, the films were washed with distilled water and dried in an oven at 60 °C for 30 min [6]. The process of anodization is illustrated in Figure 1.…”

Section: Preparation Of Aluminum Sheetsmentioning

confidence: 99%

Synthesis and Characterization of TTIP-Al Films and Fe3+/TTIP-Al Films to be Used in Photocatalytic Oxidation under Visible Light

Intawong

Dechapanya

Jawjit

2021

Walailak J Sci & Tech

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Currently, pressed-wood industries reuse the chemical solution in the wood conservation step by using a chlorine solution. However, this procedure is potentially harmful to workers due to the enormous amount of chlorine use. This research will offer more environmental and human health-friendly solutions to reuse the chemical solution in the process. In this research, the synthesis and characterization of the TTIP-Al films and the Fe3+/TTIP-Al films used in photocatalytic oxidation under visible light was studied. The synthesized films were used to study the COD and color removal of the chemical solution used in the pressed-wood process. To prepare the films, aluminum sheets were cleaned and anodized to increase the films' pore size and roughness for improving the catalyst stabilization on the aluminum substrates. Titanium isopropoxide (TTIP) was used to prepare the TiO2-Fe3+ solution in the sol-gel and dip-coating method. A total of 6 different catalyst dosages of films were synthesized. The morphology of aluminum sheets and the synthesized films were analyzed using SEM. Results revealed that anodization enhanced the pore size and roughness of the film surfaces. The analysis of XRD indicated that the crystal of Anatase TTIP at 25.5° 2 Theta was observed, in which the higher dosage of TTIP resulted in higher peak intensity. Results from the UV-VIS analysis suggested that absorbed wavelengths for Fe3+/TTIP-Al films shifted to visible light (410 nm) compared to those of TTIP-Al films (380 nm). FT-IR Spectra analysis of the Fe3+/TTIP-Al films showed the group of hydroxyl radicals on the Fe3+/TiO2 surface. This functional group could affect the efficiency of photocatalytic oxidation. Color and COD removal of the chemical solution in rubberwood pressed using these films in the annular photocatalytic reactor will be studied in the next phase of this work.

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Section: Preparation Of Aluminum Sheetsmentioning

confidence: 99%

Synthesis and Characterization of TTIP-Al Films and Fe3+/TTIP-Al Films to be Used in Photocatalytic Oxidation under Visible Light

Intawong

Dechapanya

Jawjit

2021

Walailak J Sci & Tech

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“…The doping and functionalization of anodically prepared TiO 2 nanotubes have been performed mainly by the deposition and dip coating techniques, as well as by the annealing of prepared structures in a specific atmosphere [ 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 ]. The anodic formation of doped and mixed TiO 2 nanotubes is also possible by the anodization of titanium alloy films and by the anodization of titanium in a dopant (or mixture) material containing electrolytes [ 20 , 64 ]. The anodization of titanium alloys is an efficient way to obtain doped or solid solutions of TiO 2 .…”

Section: Synthesis Of Porous Tio 2 Structuresmentioning

confidence: 99%

Porous TiO2-Based Gas Sensors for Cyber Chemical Systems to Provide Security and Medical Diagnosis

Galstyan

2017

Sensors

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Gas sensors play an important role in our life, providing control and security of technical processes, environment, transportation and healthcare. Consequently, the development of high performance gas sensor devices is the subject of intense research. TiO2, with its excellent physical and chemical properties, is a very attractive material for the fabrication of chemical sensors. Meanwhile, the emerging technologies are focused on the fabrication of more flexible and smart systems for precise monitoring and diagnosis in real-time. The proposed cyber chemical systems in this paper are based on the integration of cyber elements with the chemical sensor devices. These systems may have a crucial effect on the environmental and industrial safety, control of carriage of dangerous goods and medicine. This review highlights the recent developments on fabrication of porous TiO2-based chemical gas sensors for their application in cyber chemical system showing the convenience and feasibility of such a model to provide the security and to perform the diagnostics. The most of reports have demonstrated that the fabrication of doped, mixed and composite structures based on porous TiO2 may drastically improve its sensing performance. In addition, each component has its unique effect on the sensing properties of material.

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“…The one-step fabrication of Bi-TNTs was achieved in accordance with our previous report [47]. An electrolyte comprised of EG, NH4F, DI water, and 1 wt % bismuth nitrate was utilized for this purpose.…”

Section: Synthesis Of Bi-tntmentioning

confidence: 99%

Continuous-Flow Photocatalytic Degradation of Organics Using Modified TiO2 Nanocomposites

Ali

Kim

2018

Catalysts

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Abstract:In this study, TiO 2 nanotubes (TNTs) were fabricated on a Ti sheet following the anodic oxidation method and were decorated with reduced graphene oxide (RGO), graphene oxide (GO), and bismuth (Bi) via electrodeposition. The surface morphologies, crystal structures, and compositions of the catalyst were characterized by field emission scanning electron microscopy, Auger electron spectroscopy, X-ray diffraction, photoluminance spectra, X-ray photoelectron spectroscopy, and energy dispersive X-ray spectroscopy. The TNTs loaded with RGO, GO, and Bi were used in a continuous-flow system as photocatalysts for the degradation of methylene blue (MB) dye. It was found that the TNTs are efficient photocatalysts for the removal of color from water; upon UV irradiation on TNTs, the MB removal ratio was~89%. Moreover, the photocatalytic activities of the decorated TNTs were higher than that of pristine TNTs in visible light. In comparison with TNTs, the rate of MB removal in visible light was increased by a factor of 3.4, 3.2, and 2.9 using RGO-TNTs, Bi-TNTs, and GO-TNTs, respectively. The reusability of the catalysts were investigated, and their quantum efficiencies were also calculated. The cylindrical anodized TNTs were excellent photocatalysts for the degradation of organic pollutants. Thus, it was concluded that the continuous-flow photocatalytic reactor comprising TNTs and modified TNTs is suitable for treating wastewater in textile industries.

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Anodization of bismuth doped TiO2 nanotubes composite for photocatalytic degradation of phenol in visible light

Cited by 60 publications

References 41 publications

Synthesis and Characterization of TTIP-Al Films and Fe3+/TTIP-Al Films to be Used in Photocatalytic Oxidation under Visible Light

Synthesis and Characterization of TTIP-Al Films and Fe3+/TTIP-Al Films to be Used in Photocatalytic Oxidation under Visible Light

Porous TiO2-Based Gas Sensors for Cyber Chemical Systems to Provide Security and Medical Diagnosis

Continuous-Flow Photocatalytic Degradation of Organics Using Modified TiO2 Nanocomposites

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