Photocatalytic aerobic oxidation of toluene and its derivatives to aldehydes on Pd/Bi 2 WO 6

Yuan, Bo; Bao, Zhenan; Wang, Zhiliang; Lü, Shouqin; Li, Jun; Liu, Yan; Li, Can

doi:10.1016/s1872-2067(17)62757-8

Cited by 53 publications

(23 citation statements)

References 51 publications

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“…Prior to light illumination, the experiments were performed in darkness for 30 min to reach an adsorption and desorption equilibrium between polluting phenol and the added catalysts. Then the solution was stirred under visible‐light irradiation for the photocatalytic reaction . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

Jia

Xue

Wang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Semiconductor photocatalysis is the most promising green and energy‐saving technology for environmental remediation. Unfortunately, photocatalysis nanotechnology for its practical application is often challenged by the low capturing ability for visible light and use of expensive noble metals. In this work, we report the non‐noble Bi nanoparticles assembled on Bi2WO6 with enhanced visible‐light photocatalytic activity for decontamination of phenol and hexavalent chromium in water. RESULTS The 3% Bi/Bi2WO6 composite had the highest photocatalytic activity compared to pristine Bi2WO6, which could completely decompose phenol into small products within 120 min. More importantly, the Cr(VI) removal rate of the 3% Bi/Bi2WO6 catalyst in the presence of triethanolamine (TEOA, 2%) after irradiation for 12 min was up to 96.2%. CONCLUSIONS The improved photocatalytic performance could be due to the fast transfer of photogenerated charge carried by the formation of an anti‐barrier layer at the interface between metal Bi nanoparticles and the n‐type Bi2WO6 semiconductor; the enhancement of electron energy may be attributed to the localized surface plasmon resonance properties of Bi nanoparticles, as well as conspicuously strengthened and broad light‐capturing ability across the whole visible‐light range. This strategy could provide some inspiration for the design of other Bi‐based semiconductor heterostructures for decomposing harmful organic pollutants in wastewater and purifying hazardous gases in the air. © 2018 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

Jia

Xue

Wang

et al. 2018

J of Chemical Tech & Biotech

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“…Nevertheless, great efforts have been made to develop suitable catalytic systems for the selective toluene oxidation to benzaldehyde, with a special attention to the sustainability aspect. As an example, homogenous catalysts in combination with ionic liquids [9] or deep eutectic solvents (DES) [10] as reaction media, heterogeneous catalytic systems [11][12][13][14], photocatalytic aerobic oxidation [15,16] and electrooxidation in ionic liquids [17] have been reported. Although the majority of these synthetic pathways show good selectivity, efficient catalyst recycling, and safe reaction conditions, the conversion rate is not enough yet to allow an industrial application [9,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…As an example, homogenous catalysts in combination with ionic liquids [9] or deep eutectic solvents (DES) [10] as reaction media, heterogeneous catalytic systems [11][12][13][14], photocatalytic aerobic oxidation [15,16] and electrooxidation in ionic liquids [17] have been reported. Although the majority of these synthetic pathways show good selectivity, efficient catalyst recycling, and safe reaction conditions, the conversion rate is not enough yet to allow an industrial application [9,15,16]. Among homogenous catalytic systems, transition metal complexes [18][19][20][21][22][23], and metal/bromide catalysts [24] have been extensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Highly Selective Toluene Oxidation to Benzaldehyde

et al. 2021

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Thanks to the well-recognized role of benzaldehyde in industry, nowadays the research of new and sustainable approaches to selectively synthesize such an interesting product is receiving great attention from the chemists’ community. In this paper, a V-based catalytic biphasic system is adopted to perform toluene oxidation to benzaldehyde. Importantly, to pursue sustainability, organic solvents have been avoided, so toluene is used as substrate and co-solvent, together with water. Also, the use of hydrophobic ionic liquids has been explored. To perform oxidation, NH4VO3 catalyst, H2O2, and a safe and inexpensive co-catalyst are used. Among the tested co-catalysts, KF and O2 were found to be the best choice, to guarantee good yields, in mild reaction conditions. In fact, with such a sustainable method, up to 30% of benzaldehyde can be obtained at 60 °C and, more interestingly, the oxidative system can be recharged, raising-up the yield. The entire process results highly selective, since no traces of benzyl alcohol or benzoic acid are detected. Hence, it constitutes a very appealing synthetic route, even suitable to be easily scaled-up at an industrial level.

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“…Selective oxidation of hydrocarbon to produce high-valueadded oxygenates is being pursued in both fundamental and applied chemistry [1][2][3][4][5]. Unfortunately, because of the chemical inertness and high bond dissociation energy (355-439 kJ/mol) of C(sp 3 )-H bonds, the activation of C(sp 3 )-H bonds is regarded as the most critical step during the oxidation of hydrocarbon.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Enhanced Activity and Selectivity for C(sp3)–H Bond Oxidation Under Visible Light by Nitrogen Doping

Hou

Gao

Zhang

et al. 2021

Trans. Tianjin Univ.

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Selective oxidation of saturated C(sp3)–H bonds in hydrocarbon to target chemicals under mild conditions remains a significant but challenging task because of the chemical inertness and high dissociation energy of C(sp3)–H bonds. Semiconductor photocatalysis can induce the generation of holes and oxidative radicals, offering an alternative way toward selective oxidation of hydrocarbons under ambient conditions. Herein, we constructed N-doped TiO2 nanotubes (N-TNTs) that exhibited remarkable activity and selectivity for toluene oxidation under visible light, delivering the conversion of toluene and selectivity of benzaldehyde of 32% and > 99%, respectively. Further mechanistic studies demonstrated that the incorporation of nitrogen induced the generation of N-doping level above the O 2p valance band, directly contributing to the visible-light response of TiO2. Furthermore, hydroxyl radicals generated by photogenerated holes at the orbit of O 2p were found to be unselective for the oxidation of toluene, affording both benzaldehyde and benzoic acid. The incorporation of nitrogen was able to inhibit the generation of hydroxyl radicals, terminating the formation of benzoic acid.

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Photocatalytic aerobic oxidation of toluene and its derivatives to aldehydes on Pd/Bi 2 WO 6

Cited by 53 publications

References 51 publications

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

Sustainable Highly Selective Toluene Oxidation to Benzaldehyde

Simultaneously Enhanced Activity and Selectivity for C(sp3)–H Bond Oxidation Under Visible Light by Nitrogen Doping

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Photocatalytic aerobic oxidation of toluene and its derivatives to aldehydes on Pd/Bi 2 WO 6

Cited by 53 publications

References 51 publications

The Bi/Bi2WO6 heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

The Bi/Bi2WO6 heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

Sustainable Highly Selective Toluene Oxidation to Benzaldehyde

Simultaneously Enhanced Activity and Selectivity for C(sp3)–H Bond Oxidation Under Visible Light by Nitrogen Doping

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The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal

The Bi/Bi₂WO₆ heterojunction with stable interface contact and enhanced visible‐light photocatalytic activity for phenol and Cr(VI) removal