Hydrothermal synthesis of TiO2 nanotubes and their application as an over-layer for dye-sensitized solar cells

Sun, Kyung Chul; Qadir, Muhammad Bilal; Jeong, Sung Hoon

doi:10.1039/c4ra03266g

Cited by 72 publications

(40 citation statements)

References 33 publications

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“…The TiO 2 nanotube support (TiO 2 NT) was prepared by the hydrothermal treatment of anatase TiO 2 powder in concentrated aqueous NaOH solution followed by acid treatment in HCl solution [19,21,22,62]. In a typical synthesis, 2 g of commercial anatase TiO 2 particles was added to 40 mL of 10 M NaOH aqueous solution in a 100 mL Teflon vessel.…”

Section: Synthesis Of Tio 2 Nanotubes Supportmentioning

confidence: 99%

A Study of Low-Temperature CO Oxidation over Mesoporous CuO-TiO2 Nanotube Catalysts

2017

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Supported copper oxide nanoparticles have attracted considerable attention as active and non-precious catalysts for many catalytic oxidation reactions. Herein, mesoporous xCuO-TiO 2 nanotube catalysts were fabricated, and their activity and kinetics toward CO oxidation were studied. The morphology and structure of the prepared catalysts were systematically studied using SEM, TEM, EDS, EDX, XRD, TGA, BET, XPS, H 2 -TPR, and Raman techniques. The BET surface area study revealed the effect of the large surface area of the mesoporous TiO 2 nanotubes on promoting the catalytic activity of prepared catalysts. The results also revealed the existence of strong metal-support interactions in the CuO-TiO 2 nanotube catalyst, as indicated by the up-shift of the E 2g vibrational mode of TiO 2 from 144 cm −1 to 145 cm −1 and the down-shift of the binding energy (BE) of Ti 2p 3/2 from 458.3 eV to 458.1 eV. The active phase of the catalyst consists of fine CuO nanoparticles dispersed on a mesoporous anatase TiO 2 nanotube support. The 50-CuO-TiO 2 nanotube catalyst demonstrated the highest catalytic activity with 100% CO conversion at T 100 = 155 • C and a reaction rate of 36 µmole s −1 g −1 . Furthermore, the catalyst demonstrated excellent long-term stability with complete CO conversion that was stable for 60 h under a continuous stream. The enhanced catalytic activity is attributed to the interplay at the interface between the active CuO phase and the TiO 2 nanotubes support.

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Section: Synthesis Of Tio 2 Nanotubes Supportmentioning

confidence: 99%

A Study of Low-Temperature CO Oxidation over Mesoporous CuO-TiO2 Nanotube Catalysts

2017

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“…Synthesis of titanium oxide nanotube array : A typical anodization of Ti foil to synthesize the Ti nanotube arrays is detailed in our previous work . Briefly, a 1 cm ×2 cm Ti‐foil (Titanium foil thickness (0.127 mm, 99.7 % trace metal from Sigma‐Aldrich).…”

Section: Methodsmentioning

confidence: 99%

“…[4] Until now, TiO 2 have reported as multi-dimensional photocatalyst in various applications under the energy and environmental fields with its existing wide band gap. [5,6] There have been various morphological modifications reported for TiO 2 , such as nanotube, [7] nanowire, [8] nanorods, [9] nanosheets, [10] microflowers [11] etc., via sol-gel, [12] hydrothermal synthesis, [13] molten salt, [14] and anodization methods, [15] etc., for different applications. [16,17] Among them, TiO 2 nanotube has a physically and chemically very stable structure, high surface area and pore volume, and excellent 3-dimensional structural characteristics and shows large reaction range.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Charge Transfer Process in Morphology Restructured TiO₂ Nanotubes via Hydrochloric Acid Assisted One Step In‐Situ Hydrothermal Approach

Dhandole

Park

et al. 2019

ChemCatChem

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In this study, we demonstrate the enhanced photoelectrochemical (PEC) performance of the titanium foil based TiO2 nanotube (TNT) array through a simple hydrothermal (HT) acid treatment method. The influence of hydrochloric acid (HCl) concentration variation in HT method on morphology and the photoelectrochemical performances of TNTs nanostructures were studied. Field Emission Scanning Electron Microscopy and X‐ray powder diffraction results confirmed the morphology and crystal structure easily restructured during HCl assisted one step in‐situ hydrothermal approach. The photocurrent density of optimized acid treated TiO2 nanotube (TH‐40) electrode was observed to be 2‐times higher than the pristine TNT electrode. Thereafter, TH‐40 sample exhibited noticeably photoelectrochemical solar hydrogen production of 66 μmol and 82 μmol in NaOH and Na2S/Na2SO3 electrolytes respectively than the pristine TNT. The enhancement of photocatalytic activity was ascribed to the restructured morphology, as well as the efficient charge separation at rutile‐anatase interface in the TH‐40 sample as well as at the electrode‐electrolyte interface. A hydrochloric acid assisted one step in‐situ hydrothermal approach tailors the crystal structure and morphological features, which enhanced the photoelectrochemical properties of TiO2 nanotube.

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“…So far, many different methods have been used to fabricate the TiO 2 nanotubes including: templating [1], sol-gel [2], electrochemical anodization [3], and hydrothermal synthesis methods [4,5]. A review of these methods was presented in the report of N. Liu et al [6].…”

Section: Tio 2 Nanotubes Have Recently Attracted a Considerable Intermentioning

confidence: 99%

EFFECT OF PRECURSOR MATERIALS AND HYDROTHERMAL TIME ON THE MORPHOLOGY, MICROSTRUCTURE AND PHOTOCATALYTIC ACTIVITY OF TiO2 NANOTUBES

Le¹

2018

JST

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In this study, effects of precursor materials and hydrothermal reaction time on the morphology, microstructures and photocatalytic activity of TiO 2 nanotubes (TNTs) were investigated. Results show that the selection of nanopowder TiO 2 precursors and hydrothermal time has significantly affected the morphology, microstructure and photocatalytic property of TiO 2 nanotubes. TNTs-Merck was fabricated from TiO 2 -Merck precursor at 130 °C for 22 h possesses a uniform structure with a range of the diameter of ~ 10 nm and length of ~ 100 nm.

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Hydrothermal synthesis of TiO2 nanotubes and their application as an over-layer for dye-sensitized solar cells

Cited by 72 publications

References 33 publications

A Study of Low-Temperature CO Oxidation over Mesoporous CuO-TiO2 Nanotube Catalysts

A Study of Low-Temperature CO Oxidation over Mesoporous CuO-TiO2 Nanotube Catalysts

Enhanced Charge Transfer Process in Morphology Restructured TiO₂ Nanotubes via Hydrochloric Acid Assisted One Step In‐Situ Hydrothermal Approach

EFFECT OF PRECURSOR MATERIALS AND HYDROTHERMAL TIME ON THE MORPHOLOGY, MICROSTRUCTURE AND PHOTOCATALYTIC ACTIVITY OF TiO2 NANOTUBES

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Hydrothermal synthesis of TiO2 nanotubes and their application as an over-layer for dye-sensitized solar cells

Cited by 72 publications

References 33 publications

A Study of Low-Temperature CO Oxidation over Mesoporous CuO-TiO2 Nanotube Catalysts

A Study of Low-Temperature CO Oxidation over Mesoporous CuO-TiO2 Nanotube Catalysts

Enhanced Charge Transfer Process in Morphology Restructured TiO2 Nanotubes via Hydrochloric Acid Assisted One Step In‐Situ Hydrothermal Approach

EFFECT OF PRECURSOR MATERIALS AND HYDROTHERMAL TIME ON THE MORPHOLOGY, MICROSTRUCTURE AND PHOTOCATALYTIC ACTIVITY OF TiO2 NANOTUBES

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Enhanced Charge Transfer Process in Morphology Restructured TiO₂ Nanotubes via Hydrochloric Acid Assisted One Step In‐Situ Hydrothermal Approach