CTAB-assisted fabrication of TiO2 with improved photocatalytic performance

Zhong, Jun; Li, Jian Zhang; Feng, Fa Mei; Huang, Sheng tiang; Zeng, Jun

doi:10.1016/j.matlet.2013.03.030

Cited by 33 publications

(5 citation statements)

References 11 publications

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“…Thus, with an increase in quantum of CTAB, the dispersion of precursor within the mixture is enhanced leading to reduction in the particle size. If the quantity used is increased beyond optimum, the viscosity of colloids becomes greater and the precursors of TiO 2 particles that have formed a nucleus tend to reunite easily, forming bigger particles and particles agglomerate to form larger particles [33] . The literature also demonstrated that the loading of CTAB is an important factor which influences the catalyst modification process [17] , [34] .…”

Section: Resultsmentioning

confidence: 99%

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Tiple

Sinhmar

Gogate

2021

Ultrasonics Sonochemistry

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Highlights Development of best synthesis process for TiO 2 catalyst using ultrasound. Lower particle size and uniform morphology can be obtained using ultrasound. Performance of catalytic activity evaluated for the desulfurization of thiophene. UV and US in combination with oxidant/catalyst gives best treatment approach. Role of solvent in affecting desulfurization of thiophene demonstrated.

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Section: Resultsmentioning

confidence: 99%

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Tiple

Sinhmar

Gogate

2021

Ultrasonics Sonochemistry

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“…As a surfactant, cetyltrimethylammonium bromide (CTAB) has a perfect poreforming effect and could play the role of framework support. There have been many studies on the addition of CTAB to improve the performance of TiO 2 gel since it can effectively increase the specific surface area (Zhong et al, 2013;Wu et al, 2018;Dong et al, 2020). However, TiO 2 aerogel requires subsequent heat treatment to improve its crystallinity (Baia et al, 2006), which removes CTAB (Nadrah et al, 2017) and causes a severe collapse of the pore structure and limits the improvement of photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Monolithic TiO2 Aerogels With Relatively Low Shrinkage and Improved Formability Assisted by CTAB

et al. 2021

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Monolithic TiO2 aerogels without severe shrink were obtained by the sol-gel method with the addition of the surfactant cetyltrimethylammonium bromide (CTAB) to control the hydrolysis and polycondensation process and acetonitrile solvent as the solvent to improve the crystallinity. After CO2 supercritical drying, the shrinkage ratio of monolithic TiO2 aerogels modified by CTAB decreased by up to ∼26.9%, compared with the pure TiO2 aerogel. Their apparent densities were all lower than 300 g/cm3. X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform infrared spectroscopy (FTIR) and BET Specific Surface Area Analysis were used to analyze the as-synthesized samples. The results revealed that all the samples were anatase-TiO2 phase with nanoporous network structures. The specific surface areas reached 250.2 m2/g confirmed by the BET (Brunaur–Emmett–Teller method) analysis. However, TiO2 aerogels without the addition of CTAB showed evident agglomeration and collapse of the network in comparison with CTAB-added samples. To further study the structure-property relationship, the photocatalysis performance of as-synthesized and 300°C-calcined aerogels was carried out contrastively. Interestingly, the influences of the CTAB adding amount of as-synthesized and calcined TiO2 aerogels are negative and positive, respectively, which is probably due to the synergistic effect of CTAB hindrance and grain refinement. Potentially, This kind of TiO2 aerogels assisted by CATB with low density, small shrinkage, improved formability, high specific surface area and fine crystalline grain may be applied in various applications, such as electrochemistry, photocatalysis, etc.

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“…In this study, CTAB, a cationic surfactant, was chosen because it has previously been applied to reduce the size of particles and to form homogeneous spherical particles with a great dispersion in an aqueous solution during the sol−gel reaction. 58,59 F127, on the other hand, was chosen as it was proven as an assistant surfactant to create a sustainable barrier against external forces. The addition of double surfactants facilitates the formation of chemical complexes with Ti atoms.…”

Section: Introductionmentioning

confidence: 99%

“…Herein, we report a series of anatase titania nanorods in different scales, which were synthesized by a two-step sol–gel hydrothermal method using double surfactants (CTAB and F127) with the assistance of three distinct amines. In this study, CTAB, a cationic surfactant, was chosen because it has previously been applied to reduce the size of particles and to form homogeneous spherical particles with a great dispersion in an aqueous solution during the sol–gel reaction. , F127, on the other hand, was chosen as it was proven as an assistant surfactant to create a sustainable barrier against external forces. The addition of double surfactants facilitates the formation of chemical complexes with Ti atoms.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Size-Controlled Titania Nanorods through Double Surfactants

Shiu

Way

et al. 2021

Inorg. Chem.

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A synthetic technique based on a two-step sol–gel hydrothermal method using cetyltrimethylammonium bromide (CTAB) and triblock copolymer PEO106–PPO70–PEO106 (F127) as double surfactants with the assistance of three amines (ethylamine (EA), diethylamine (DEA), and triethylamine (TEA)) for fabrications of anatase titania nanorods is proposed. The formation and growth mechanisms of TiO2 crystals are described. We discovered that crystal size reduces with an increase in the number of alkyl substituents on the nitrogen of amines because the steric hindrance of the bulky alkyl substituent around nitrogen suppresses the nucleation and crystal growth rate. The size of titania from 80 to 220 nm is modulated with concentrations of EA, DEA, and TEA. The amines are considered as catalysts for morphological evolution of TiO2 crystals. The results indicate that the incorporation of double surfactants (F127–CTAB) has a dual role, acting as a chelating agent for titania against external forces and a capping agent inhibiting the three-dimensional growth of TiO2 crystals.

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CTAB-assisted fabrication of TiO2 with improved photocatalytic performance

Cited by 33 publications

References 11 publications

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Improved direct synthesis of TiO2 catalyst using sonication and its application for the desulfurization of thiophene

Synthesis of Monolithic TiO2 Aerogels With Relatively Low Shrinkage and Improved Formability Assisted by CTAB

Synthesis and Characterization of Size-Controlled Titania Nanorods through Double Surfactants

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