Construction of carbon nanodots/tungsten trioxide and their visible-light sensitive photocatalytic activity

Yan, Fanyong; Kong, Depeng; Fu, Yang; Ye, Qianghua; Yin-yin, Wang; Chen, Li

doi:10.1016/j.jcis.2015.12.043

Cited by 38 publications

(10 citation statements)

References 35 publications

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“…The C 1s spectra of G-WO 3 (Figure 4d) was resolved into two peaks at 284.80 eV and 286.56 eV, which could be attributed to the surface adsorbed carbon and the C-O bond, respectively [37]. Compared with the pure WO 3 (G), the C 1s peaks of N-CDs/G-WO 3 -0.6 or N,Fe-CDs/G-WO 3 -0.6 at about 286 eV and 288 eV were assigned to the binding energies of C-N and C=O from the CDs [29,39]. Besides, as shown in Figure 4e, compared to the pure G-WO 3 , the N 1s peaks at around 402 eV and 400 eV were obvious in the N-CDs/G-WO 3 -0.6 and N,Fe-CDs/G-WO 3 -0.6 composites, corresponding to the nitrogen atoms of N-H and C-N bonds, respectively [40].…”

Section: Bet Analysismentioning

confidence: 99%

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

Yan

Wang

et al. 2020

Catalysts

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The development of efficient and non-toxic photocatalysts with a full spectrum response is a primary strategy in the area of photocatalytically mediated pollutant elimination. Herein, we report the preparation of novel nitrogen and iron co-doped carbon dots/gear-shaped WO3 (N,Fe-CDs/G-WO3) with significantly improved broad-spectrum utilization. Characterization results demonstrated that the gear-shaped G-WO3, decorated by N,Fe-CDs with excellent electron transfer/reservoir properties, possessed abundant oxygen vacancies, had large specific surface areas, had multiple light-reflections and had a narrow band gap. As a result, the N,Fe-CDs/G-WO3 composite exhibited excellent photocatalytic activity towards the degradation of water contaminants under full spectrum irradiation. For example, the photodegradative efficiencies of rhodamine B (RhB) reached 81.4%, 97.1%, and 75% in 2 h, under ultraviolet, visible, and near-infrared (UV, vis, and NIR) light irradiation, respectively. Moreover, the N,Fe-CDs/G-WO3 composite also exhibited an outstanding photocatalytic degradation efficiency for other dyes, pharmaceuticals, and personal care products (PPCPs) like methylene blue (MB), ciprofloxacin (CIP), tetracycline hydrochloride (TCH), and oxytetracycline (OTC) (91.1%, 70.5%, 54.5%, and 47.8% in 3 h, respectively). The radical trapping experiments indicated that h+ and ·OH were the main reactive oxidative species (ROS), and the conversion between Fe (III) and Fe (II) played a key role in the photocatalytic reactions. Such a N,Fe-CD decorated material with brilliant photocatalytic activity has tremendous potential for application in environmental remediation.

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Section: Bet Analysismentioning

confidence: 99%

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

Yan

Wang

et al. 2020

Catalysts

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“…CNTs have chemically unreactive surfaces making it difficult to deposit metal nanoparticles on their surfaces, hence, metal nanoparticles on CNTs generally have poor dispersion and large particle sizes, this decreases the electro-activity of the nanocatalyst [21]. Researchers have developed functionalisation methods in order to incorporate oxygen-containing groups on CNTs so as to improve their reactivity and interaction with nanocatalysts [15,40]. These functionalisation methods include impregnation [22], acid treatment (such as a mixture of HNO 3 and H 2 SO 4 ) [23,24], polyol processing [25], ion-exchange [26] and electrochemical deposition [27].…”

Section: Carbon Supportsmentioning

confidence: 99%

“…Top-down method employs treating starting materials such as graphitic powder or MWCNTs in harsh chemical conditions [36]. Bottom-up approaches include ultra-sonication [37], microwave pyrolysis [38] and hydrothermal treatment of small molecules such as starch [39], citric acid [40] glucose [37] and leeks [41]. Carbon nanodots used in the studies described in this chapter were prepared by the pyrolysis of oats grains [42].…”

Section: Carbon Nanodotsmentioning

confidence: 99%

Platinum-Based Carbon Nanodots Nanocatalysts for Direct Alcohol Fuel Cells

Gwebu¹,

Nomngongo²,

Maxakato³

2019

Nanocatalysts

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Platinum and its alloys are regarded as best nanocatalysts for the electro-oxidation of alcohol fuels especially in acidic conditions. The performance of nanocatalysts for alcohol fuel cells depends greatly on the support material. A good support material should have high surface area to obtain high metal dispersion. It should also bond and interact with the nanocatalysts to improve the activity of the overall electrode. Most importantly, the support material should offer great resistance to corrosion under the harsh fuel cell conditions. In this chapter, the use of carbon nanodots as support materials for Pt-Sn and Pt-TiO 2 nanoparticles is discussed. The electrochemical activity of Pt/CNDs, Pt-Sn/CNDs and Pt/CNDs-TiO 2 nanocatalysts was studied using cyclic voltammetry (CV) in acidic and alkaline conditions. Chronoamperometry (CA) was used to investigate the long-term stability of the nanocatalysts under the fuel cell environment. Electrochemical results demonstrated that binary Pt nanocatalysts are more active compared to monocatalysts. It was also observed that carbon nanodots are better support materials than carbon black. Blending carbon nanodots with titanium dioxide (a ceramic material) improves the corrosion resistance of the nanocatalyst. Cyclic voltammetry results also proved that alcohol electro-oxidation is enhanced in alkaline conditions.

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“…Although there exists a hand full of research on the synthesis of CDs from chemical precursors, 36,37 CDs from green precursors are found to be advantageous since it is environmentally friendly,…”

Section: Introductionmentioning

confidence: 99%

Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

2021

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Construction of carbon nanodots/tungsten trioxide and their visible-light sensitive photocatalytic activity

Cited by 38 publications

References 35 publications

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

N,Fe-Doped Carbon Dot Decorated Gear-Shaped WO3 for Highly Efficient UV-Vis-NIR-Driven Photocatalytic Performance

Platinum-Based Carbon Nanodots Nanocatalysts for Direct Alcohol Fuel Cells

Review on green carbon dot-based materials for the photocatalytic degradation of dyes: fundamentals and future perspective

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