Synthesis of PW11Sn/TiO2 nanofibre catalytic materials with tunable rutile/anatase phase and application in ultra-deep desulfurization

Ma, Wenwen; Xu, Yan; Ma, Kaiwen; Luo, Yu‐Hui; Liu, Yushuang; Zhang, Hong

doi:10.1016/j.mcat.2016.12.024

Cited by 14 publications

(4 citation statements)

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“…Polyoxometalates are commonly used in the field of catalysis because of their adjustable acid-base and redox properties over a wide range (Omwoma et al 2015;Li et al 2017a, b;Ma et al 2017;Lu et al 2017;Bertleff et al 2017;Jiang et al 2017;Chen et al 2013). In our previous work, an oxidative desulfurization system with DESs as extractants was developed and commercial phosphotungstic acid (PTA) showed superior catalytic activity (Liu et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

et al. 2018

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Deep eutectic solvents (DESs) are a new class of green solvents analogous to ionic liquids due to their biodegradable capacity and low cost. However, the direct extractive desulfurization of diesel oil by DESs cannot meet the government's standard. In this work, amphiphilic polyoxometalates were synthesized and characterized by FT-IR and mass spectrometry. The oxidative desulfurization results showed that benzothiophene (BT) could be completely removed by employing a [(C 6 H 13) 3 P(C 14 H 29)] 3 PMo 12 O 40 , DES (ChCl/2Ac) and H 2 O 2 system. It was also found that the organic cation of catalysts played a positive role in oxidative desulfurization. The reaction conditions, such as reaction temperature and time, the amount of catalyst and DES and H 2 O 2 /S (O/S) molar ratio, were optimized. Different sulfides were tested to determine the desulfurization selectivity of the optimal reaction system, and it was found that 97.2% of dibenzothiophene (DBT) could be removed followed by 80.7% of 4-MDBT and 76.0% of 4,6-DMDBT. After reaction, the IR spectra showed that the catalyst [(C 6 H 13) 3 P(C 14 H 29)] 3 PMo 12 O 40 was stable during the reaction process and the oxidative product was dibenzothiophene sulfone (DBTO 2). Furthermore, the catalyst can be regenerated and recycled for four runs with little loss of activity.

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Section: Introductionmentioning

confidence: 99%

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

et al. 2018

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“…We proposed a potential desulfurization mechanism in the ECODS with S3 as the catalyst, which was similar to a previously reported mechanism. , As evident from Scheme , the proposed desulfurization system contained three phases, i.e., upper (model oil containing sulfur compounds), middle (H 2 O 2 aqueous solution), and low (ILs dispersing catalysts) layers. These three layers could be adequately mixed via stirring during the desulfurization reaction.…”

Section: Resultsmentioning

confidence: 99%

“…TiO 2 nanofibers were prepared by electrospinning according to our previous work . Catalyst n [H 3 PW 12 -MIL-101(Cr)]/ m (TiO 2 ) nanofibers ( n / m = 1:2, 1:4, 1:6, 1:8, and 1:9, where n and m stand for mole ratio of H 3 PW 12 -MIL-101(Cr) and TiO 2 , respectively) were prepared via a one-pot hydrothermal method.…”

Section: Methodsmentioning

confidence: 99%

“…Accordingly, the optimal conditions for desulfurization were obtained, and finally, the mechanisms of desulfurization and recyclability of catalysts were analyzed. 56 Catalyst n[H 3 PW 12 -MIL-101(Cr)]/m(TiO 2 ) nanofibers (n/m = 1:2, 1:4, 1:6, 1:8, and 1:9, where n and m stand for mole ratio of H 3 PW 12 -MIL-101(Cr) and TiO 2 , respectively) were prepared via a one-pot hydrothermal method. The schematic illustration of catalysts is shown in Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

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PW₁₂-MIL-101(Cr)/TiO₂ Nanofibers: Electrospinning Synthesis and Deep Desulfurization Performance under Mild Condition

Ma,

Kong

et al. 2024

Energy Fuels

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Novel H3PW12O40-MIL-101(Cr)/TiO2 nanofibrous catalysts with outstanding deep-desulfurization performance were successfully obtained via electrospinning combined with a one-pot hydrothermal method in this study. The crystal phase of TiO2 as well as the morphology and composition structure of H3PW12O40-MIL-101(Cr)/TiO2 nanofibrous catalysts were characterized, and the desulfurization performance of H3PW12O40-MIL-101(Cr)/TiO2 nanofibrous catalysts was extensively studied. At an O/S molar ratio of 4:1, 99% desulfurization efficiency could be achieved at 50 °C using 0.02 g of n[H3PW12-MIL-101(Cr)]/m(TiO2) (n/m = 1:5.78) nanofibers as catalysts within 180 min. Further, the recyclability of catalysts and potential mechanism of the desulfurization reaction were analyzed in detail.

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Controllable preparation of highly dispersed TiO₂ nanoparticles for enhanced catalytic oxidation of dibenzothiophene in fuels

Lü

Peng

Xun

et al. 2018

Applied Organom Chemis

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The aggregation of nanoparticle catalysts is one of the main problems in catalytic reactions. In this study, a series of TiO 2 nanoparticle catalysts with various dispersions were prepared and applied in the catalytic oxidation of dibenzothiophene (DBT) systems. Compositions and structures of the as-prepared samples were analyzed by means of wide-angle X-ray diffraction, Raman and X-ray photoelectron spectroscopies. The dispersions of TiO 2 nanoparticles were controlled by calcining at various temperatures and verified using transmission electron microscopy. It was found that the activities of TiO 2 nanoparticles in the catalytic oxidation of DBT were positively correlated with the dispersions. TiO 2 nanoparticles calcined at 500°C (500-TiO 2 ) showed the best catalytic activity and the oxidation of DBT reached 99.8% under mild conditions. Based on the results of GC-MS analysis, radical trapping experiments and electron spin resonance spectra, • O 2 − radicals were proved to be the main active species in the oxidation process, and a mechanism is proposed. Meanwhile, the recycling performance of 500-TiO 2 was investigated, and no obvious decrease was observed after six recycles.

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Synthesis of PW11Sn/TiO2 nanofibre catalytic materials with tunable rutile/anatase phase and application in ultra-deep desulfurization

Cited by 14 publications

References 41 publications

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

PW₁₂-MIL-101(Cr)/TiO₂ Nanofibers: Electrospinning Synthesis and Deep Desulfurization Performance under Mild Condition

Controllable preparation of highly dispersed TiO₂ nanoparticles for enhanced catalytic oxidation of dibenzothiophene in fuels

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Synthesis of PW11Sn/TiO2 nanofibre catalytic materials with tunable rutile/anatase phase and application in ultra-deep desulfurization

Cited by 14 publications

References 41 publications

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

PW12-MIL-101(Cr)/TiO2 Nanofibers: Electrospinning Synthesis and Deep Desulfurization Performance under Mild Condition

Controllable preparation of highly dispersed TiO2 nanoparticles for enhanced catalytic oxidation of dibenzothiophene in fuels

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PW₁₂-MIL-101(Cr)/TiO₂ Nanofibers: Electrospinning Synthesis and Deep Desulfurization Performance under Mild Condition

Controllable preparation of highly dispersed TiO₂ nanoparticles for enhanced catalytic oxidation of dibenzothiophene in fuels