A novel and facile synthesis of black TiO 2  with improved visible-light photocatalytic H 2  generation: Impact of surface modification with CTAB on morphology, structure and property

Wang, Ting; Li, Wanwen; Xu, Dandan; Wu, Xuanmin; Cao, Lei; Meng, Jianxin

doi:10.1016/j.apsusc.2017.07.153

Cited by 41 publications

(5 citation statements)

References 40 publications

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“…The absorption bands from 2359-2332, 2161 and 1979 cm −1 could be associated with some remains from the CTAB molecule after the calcination, respectively due to C-N bonding stretching. The same bands, slightly shifted, were also noticed by Wang et al [39]. These bands did not change upon calcination, and the traces of impurities were bonded in a very stable manner on the titania support.…”

Section: E-550supporting

confidence: 82%

“…The broad band between 3600 and 3100 cm −1 and the band from 1637 cm −1 are due, respectively, to the-OH groups from adsorbed water on the surface of the solids and to the terminal hydroxyl groups bonded to the titania surface (bending modes of Ti-OH). It is worth noting that the intensity of the band associated with the adsorbed water was more intense for the sample calcined at 550 • C and decreased heavily when the calcination temperature became higher [38][39][40]. The absorption bands from 2359-2332, 2161 and 1979 cm −1 could be associated with some remains from the CTAB molecule after the calcination, respectively due to C-N bonding stretching.…”

Section: E-550mentioning

confidence: 94%

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Urea-Assisted Synthesis of Mesoporous TiO2 Photocatalysts for the Efficient Removal of Clofibric Acid from Water

et al. 2021

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Mesoporous TiO2 photocatalysts intended for the advanced removal of clofibric acid (CA) from water were synthesized by the sol-gel method in a medium containing cetyl-trimethyl-ammonium bromide (CTAB) and urea, using either ethanol or isopropanol to dilute the TiO2 precursor. The activation of the samples was undertaken at 550, 650 and 750 °C. The XRD revealed that the nature of the solvent resulted in significant differences in the anatase-to-rutile ratios obtained at different temperatures. The specific surface area values were situated between 9 and 43 m2g−1 and the band gap values were similar for all the samples. The photocatalytic activity of the prepared samples was examined for the degradation of CA, an emergent water contaminant. The photocatalytic tests performed under UV-A irradiation revealed that the photo-reactivity of these materials depends on the calcination temperature. The best results were obtained for the samples calcined at 750 °C, which showed high yields of CA elimination, as well as almost complete mineralization (over 95%) after 180 min of reaction. Good results in terms of catalyst reusability in the reaction were found for the catalyst showing the highest photo-reactivity. Therefore, the samples can be considered good candidates for future water remediation applications.

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Section: E-550supporting

confidence: 82%

Section: E-550mentioning

confidence: 94%

Urea-Assisted Synthesis of Mesoporous TiO2 Photocatalysts for the Efficient Removal of Clofibric Acid from Water

et al. 2021

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“…The new appearance of the N peak in CDs/B-TiO 2 can be attributed to the CDs, further indicating the successful combination of CDs and B-TiO 2 . Two peaks at 464.0 and 458.3 eV were observed for Ti 2p 1/2 and Ti 2p 3/2 , respectively, corresponding to the Ti(IV) ion in the titanium dioxide crystal (Figure c). , Similar Ti components were observed in CDs/B-TiO 2 , but their binding energy slightly changed. As shown in Figure d, the peak at 530.6 eV is the result of the presence of CO bonding, and the peak appearing at 529.5 eV can be explained by the presence of oxygen in the lattice.…”

Section: Resultsmentioning

confidence: 73%

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

et al. 2023

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The development of a photoelectrochemical (PEC) sensor for the sensitive and rapid detection of glucose is highly desirable. In PEC enzyme sensors, inhibition of the charge recombination of electrode materials is an efficient technique, and detection in visible light can prevent enzyme inactivation due to ultraviolet irradiation. In this study, a visible light-driven PEC enzyme biosensor was proposed, using CDs/branched TiO 2 (B-TiO 2 ) as the photoactive material and glucose oxidase (GOx) as the identification element. The CDs/B-TiO 2 composites were produced via a facile hydrothermal method. Carbon dots (CDs) can not only act as photosensitizers but also inhibit photogenerated electron and hole recombination of B-TiO 2 . Under visible light, electrons in the carbon dots flowed to B-TiO 2 and further to the counter electrode through the external circuit. In the presence of glucose and dissolved oxygen, H 2 O 2 generated through the catalysis of GOx could consume electrons in B-TiO 2 , causing a decrease in photocurrent intensity. Ascorbic acid was added to ensure the stability of the CDs during the test. Based on the variation of the photocurrent response, the CDs/B-TiO 2 /GOx biosensor presented a good sensing performance of glucose in visible light, its detection range was from 0 to 9.00 mM, and the detection limit was 0.0430 mM.

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“…In 2011, Chen et al [39] synthesized the first black TiO 2 nanomaterial for photocatalysis, by thermally converting stoichiometric anatase TiO 2 into defective nanocrystals, with strong visible light absorption and photocatalytic activity for H 2 generation, at 200 °C under high H 2 pressure. Previous studies [40,41] have successfully shown that the level of O v on the structure of reduced TiO x greatly depends on the synthesis conditions, such that different levels of O v could be generated in the structure of TiO x . Wang et al [42,43] succeeded in synthesizing black-and brown-TiO 2 by using a straightforward modified sol-gel method assisted with cetyltrimethyl ammonium bromide (CTAB) as a reducing agent.…”

Section: Introductionmentioning

confidence: 99%

The Underlying Catalytic Role of Oxygen Vacancies in Fatty Acid Methyl Esters Ketonization over TiO_x Catalysts

Yazdanpanah,

Fereidooni,

Márquez

et al. 2023

ChemSusChem

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Recently, interest in converting bio‐derived fatty acid methyl esters (FAMEs) into added‐value products has significantly increased. The selectivity of ketonization reaction in the conversion of the FAMEs has significantly hampered the efficiency of this process. Herein, we prepared catalysts with different levels of oxygen vacancies while the crystal phase remained unchanged. The catalyst with the highest level of oxygen vacancy exhibited the maximum selectivity. The density functional theory (DFT) simulation showed an increase in interatomic distances leading to the formation of frustrated Lewis pairs (FLPs) upon the creation of oxygen vacancies. The surface measurements, type and density of acid sites of the catalysts, showed that the Lewis acid sites enhanced the selectivity for ketone production; while Bronsted acid sites increased the formation of by‐products. Moreover, the ketone formation rate was directly proportional to acid density. The findings of this research provide a different approach for catalyst design, based on defects engineering and their effect on the surface activity, which could be used for enhancing the catalytic performance of novel metal oxides.

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A novel and facile synthesis of black TiO 2 with improved visible-light photocatalytic H 2 generation: Impact of surface modification with CTAB on morphology, structure and property

Cited by 41 publications

References 40 publications

Urea-Assisted Synthesis of Mesoporous TiO2 Photocatalysts for the Efficient Removal of Clofibric Acid from Water

Urea-Assisted Synthesis of Mesoporous TiO2 Photocatalysts for the Efficient Removal of Clofibric Acid from Water

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

The Underlying Catalytic Role of Oxygen Vacancies in Fatty Acid Methyl Esters Ketonization over TiO_x Catalysts

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A novel and facile synthesis of black TiO 2 with improved visible-light photocatalytic H 2 generation: Impact of surface modification with CTAB on morphology, structure and property

Cited by 41 publications

References 40 publications

Urea-Assisted Synthesis of Mesoporous TiO2 Photocatalysts for the Efficient Removal of Clofibric Acid from Water

Urea-Assisted Synthesis of Mesoporous TiO2 Photocatalysts for the Efficient Removal of Clofibric Acid from Water

Carbon Dot-Modified Branched TiO2 Photoelectrochemical Glucose Sensors with Visible Light Response

The Underlying Catalytic Role of Oxygen Vacancies in Fatty Acid Methyl Esters Ketonization over TiOx Catalysts

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Product

Resources

About

Carbon Dot-Modified Branched TiO₂ Photoelectrochemical Glucose Sensors with Visible Light Response

The Underlying Catalytic Role of Oxygen Vacancies in Fatty Acid Methyl Esters Ketonization over TiO_x Catalysts