High photocatalytic performance of carbon quantum dots/TNTs composites for enhanced photogenerated charges separation under visible light

Zhao, Fenfen; Rong, Yuefei; Wan, Junmin; Hu, Zhiwen; Peng, Ziwen; Wang, Bing

doi:10.1016/j.cattod.2018.02.019

Cited by 40 publications

(16 citation statements)

References 43 publications

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“…The - interaction between CQDs and benzene resulted in enhanced absorption performance of CQDs/TNTs photocatalysts (Fig. 11c) (Zhao et al, 2018 Fig. 11d (Hou et al, 2015).…”

Section: Rational Designing Of Cqd Supported Photocatalystsmentioning

confidence: 99%

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Carbon quantum dot supported semiconductor photocatalysts for efficient degradation of organic pollutants in water: A review

Sharma

Dutta

Singh

et al. 2019

Journal of Cleaner Production

366

101

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Semiconductor photocatalyst mediated advanced oxidation processes are regarded as one of the most efficient technologies to mitigate organic pollutants in water. However, poor activity under visible light and the recombination of photogenerated electron and hole pairs hinder large scale applicability of semiconductor photocatalysts for water purification. The modification of semiconductor photocatalysts with carbon quantum dots (CQDs) is of high importance due to low toxicity, aqueous stability, enhanced surface area, economic feasibility, good biocompatibility and chemical inertness of CQDs. In this review, we highlight strategies to improve the activity of conventional semiconductor photocatalysts via coupling with CQDs. The enhanced photocatalytic activity of CQD modified narrow and wide band gap photocatalysts is due mainly to up-conversion photoluminescence (UPCL) and the electron reservoir properties of CQDs, while in the case of Z-scheme photocatalysts CQDs act as an electron mediator. Finally, a conclusive outlook and suggested research directions are provided to address challenges such as the inadequate separation of photoinduced charge carriers.

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“…The - interaction between CQDs and benzene resulted in enhanced absorption performance of CQDs/TNTs photocatalysts (Fig. 11c) (Zhao et al, 2018 Fig. 11d (Hou et al, 2015).…”

Section: Rational Designing Of Cqd Supported Photocatalystsmentioning

confidence: 99%

“…11b) . CQDs modified TNTs heterojunction were fabricated via the hydrothermal method for photodegradation of Methylene blue (MB) under visible light irradiation (Zhao et al, 2018).…”

Section: Rational Designing Of Cqd Supported Photocatalystsmentioning

confidence: 99%

Carbon quantum dot supported semiconductor photocatalysts for efficient degradation of organic pollutants in water: A review

Sharma

Dutta

Singh

et al. 2019

Journal of Cleaner Production

366

101

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“…It has been proved that the incorporated CDs in the semiconductor formed a CDs/BiOI heterojunction, which was able to construct numerous electron surface trap sites and was beneficial for enhancing the visible light absorption range as well as the charge separation. Recently, Zhao et al [81] reported the fabrication of carbon quantum dots (CQDs)/TiO 2 nanotubes (TNTs) composite via an improved hydrothermal method. The CQDs were incorporated on the surface of the TNTs, and played a vital role in improving the visible light photocatalytic performance of the composite.…”

Section: Semiconductor/carbon Heterojunctionsmentioning

confidence: 99%

“…x FOR PEER REVIEW 17 of Schematic illustration indicating the photocatalysis mechanism of the CQDs/TNTs photocatalyst. Adapted with permission from Reference[81]. Copyright (2018) Elsevier.…”

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confidence: 99%

Advanced Design and Synthesis of Composite Photocatalysts for the Remediation of Wastewater: A Review

et al. 2019

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Serious water pollution and the exhausting of fossil resources have become worldwide urgent issues yet to be solved. Solar energy driving photocatalysis processes based on semiconductor catalysts is considered to be the most promising technique for the remediation of wastewater. However, the relatively low photocatalytic efficiency remains a critical limitation for the practical use of the photocatalysts. To solve this problem, numerous strategies have been developed for the preparation of advanced photocatalysts. Particularly, incorporating a semiconductor with various functional components from atoms to individual semiconductors or metals to form a composite catalyst have become a facile approach for the design of high-efficiency catalysts. Herein, the recent progress in the development of novel photocatalysts for wastewater treatment via various methods in the sight of composite techniques are systematically discussed. Moreover, a brief summary of the current challenges and an outlook for the development of composite photocatalysts in the area of wastewater treatment are provided.

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“…Both spectra display the broad band at around at 3432.53 cm −1 , corresponding to the surface adsorbed water and hydroxyl groups in tubular structure sensors. The large amount of hydroxyl groups on sensors wall enhance their performance for the photo excited electrons capture and profiled the holes to produce the reactive oxygen species in the photocatalytic [40]. The bands at 1627.87 cm −1 and 955.87 cm −1 can be attributed to the H-O-H bending vibration of the adsorbed water.…”

Section: Ftir Analysismentioning

confidence: 99%

Voltammetric determination of itopride using carbon paste electrode modified with Gd doped TiO2nanotubes

Amro¹,

Emran²,

Alanazi³

2020

Turk J Chem

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In the present work TiO 2 nanotubes (TNT) have been synthesized by alkaline hydrothermal transformation. Then they have been doped with Gd element. Characterizations of doped and undoped TNT have been done with TEM and SEM. The chemical composition was analyzed by EDX, Raman and FTIR spectroscopy. The crystal structure was characterized by XRD. Carbon paste electrode has been fabricated and mixed with Gd doped and undoped TNT to form a nanocomposite working electrode. Comparison of bare carbon paste electrode and Gd doped and undoped TNT carbon paste electrode for 1.0 ×10 −3 M K 4 [Fe(CN) 6 ] voltammetric analysis; it was observed that Gd doped TNT modified electrode has advantage of high sensitivity. Gd doped TNT modified electrode has been used as working electrode for itopride assay in a pharmaceutical formulation. Cyclic voltammetry analysis showed high correlation coefficient of 0.9973 for itopride (0.04-0.2 mg/mL) with a limit of detection (LOD) and limit of quantitation values (LOQ) of 2.9 and 23.0 µg.mL −1 respectively.

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High photocatalytic performance of carbon quantum dots/TNTs composites for enhanced photogenerated charges separation under visible light

Cited by 40 publications

References 43 publications

Carbon quantum dot supported semiconductor photocatalysts for efficient degradation of organic pollutants in water: A review

Carbon quantum dot supported semiconductor photocatalysts for efficient degradation of organic pollutants in water: A review

Advanced Design and Synthesis of Composite Photocatalysts for the Remediation of Wastewater: A Review

Voltammetric determination of itopride using carbon paste electrode modified with Gd doped TiO2nanotubes

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