Effect of Zirconium modified Y zeolite via in situ synthesis and its regulation on the formation of excellent NiW catalyst for ultra-deep hydrodesulfurization of 4,6-DMDBT

Sun, Houxiang; Li, Lei; Zhang, Huabing; Yang, Haiyan; Yang, Tao; Shu, Mingyong; Zhong, Zicong; Yi, Ming; Meng, Bo

doi:10.1016/j.cej.2023.147514

Cited by 9 publications

(5 citation statements)

References 81 publications

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“…The peaks located at approximately 529.5 and 532.5 eV can be assigned to the chemisorbed oxygen (O ads ) and lattice oxygen (O lattice ), ,− respectively. The adsorbed oxygen species are trapped by OVs. , Hence, a higher proportion of adsorbed oxygen typically resulted in a higher concentration of OVs in the system. ,, As expected, the ratio of O ads /(O lattice + O ads ) in the catalysts showed the same trend as that of the surface Ce 3+ content. The highest adsorbed oxygen content over the BWCe-10 catalyst (32.1%) also suggests the formation of more OVs (Table S3).…”

Section: Resultssupporting

confidence: 64%

“…Therefore, XPS was used to further analyze the surface chemical environment and elemental composition of the four photocatalysts. All XPS survey spectra of four photocatalysts in Figure a show that only O, Bi, C, and W appear in Bi 2 WO 6 , whereas only C, O, W, Bi, and Ce exist in the Ce–Bi 2 WO 6 photocatalysts. ,, The characteristic spin–orbit splitting of Bi 4f 7/2 and Bi 4f 5/2 in Figure b appear at approximately 159.1 and 164.4 eV, , whereas the 35.3 and 37.5 eV signals can be assigned to W 4f 7/2 and W 4f 5/2 , ,, respectively (Figure c).…”

Section: Resultsmentioning

confidence: 94%

“…All XPS survey spectra of four photocatalysts in Figure 5a show that only O, Bi, C, and W appear in Bi 2 WO 6 , whereas only C, O, W, Bi, and Ce exist in the Ce−Bi 2 WO 6 photocatalysts. 15,35,36 The characteristic spin−orbit splitting of Bi 4f 7/2 and Bi 4f 5/2 in Figure 5b appear at approximately 159.1 and 164.4 eV, 15,16 whereas the 35.3 and 37.5 eV signals can be assigned to W 4f 7/2 and W 4f 5/2 , 15,16,37 respectively (Figure 5c). In Figure 5d−f, ten signals are detected between 880 and 919 eV in the XPS Ce 3d.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The adsorbed oxygen species are trapped by OVs. 37,60 Hence, a higher proportion of adsorbed oxygen typically resulted in a higher concentration of OVs in the system. 25,26,29 As expected, the ratio of O ads /(O lattice + O ads ) in the catalysts showed the same trend as that of the surface Ce 3+ content.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Ce-Doped Nanosheet as Visible Light Photocatalyst for the Photocatalytic Degradation of Tetracycline Hydrochloride

Zhang,

Luo,

Sun

et al. 2024

ACS Appl. Nano Mater.

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In this paper, a facile and efficient photocatalytic system for tetracycline hydrochloride (TCH) degradation is proposed. Ce-doped Bi2WO6 (Ce–Bi2WO6) nanosheets rich in oxygen vacancies were synthesized using a simple hydrothermal method and were systematically characterized. The results exhibited that a 10% Ce–Bi2WO6 (BWCe-10) catalyst with thinner and curling nanosheets was rich in oxygen vacancies, and the band gap was narrowed from 2.78 eV (Bi2WO6) to 1.61 eV, which was conducive to enhancing the photocatalytic activity of BWCe-10. As expected, BWCe-10 nanosheets exhibited much higher photocatalytic performance with 61.1% degradation of TCH within 40 min due to the formation of oxygen vacancies. Moreover, the addition of H2O2 further enhanced the TCH degradation efficiency and yielded a removal rate of 90.4%, revealing a strong synergistic effect between oxygen vacancies and H2O2 in the BWCe-10/H2O2/light system. As an electron acceptor, H2O2 boosts the separation rate of the photogenerated carriers, thereby improving the photocatalytic activity. Furthermore, the potential applications of the BWCe-10 nanosheet in terms of the effect of coexisting ions, stability, and universality were investigated. In addition, possible degradation mechanisms and pathways were proposed. In this system, h+ and e– played important roles in TCH degradation and followed the sequence h+/e– > •O2 – > •OH, and the formation of •OH and •O2 – was proved by ESR analysis. This simulated sunlight-driven system offers insights into the degradation of organic contaminants.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 94%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Ce-Doped Nanosheet as Visible Light Photocatalyst for the Photocatalytic Degradation of Tetracycline Hydrochloride

Zhang,

Luo,

Sun

et al. 2024

ACS Appl. Nano Mater.

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“…The content of tungsten in sulfide form is 75.7%. The peak with the binding energy ~35.9 eV is corresponds to tungsten in W 6+ [41] and is related to tungsten oxide.…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

Comparison of the HDS DBT reaction using bulk and supported catalysts

Mukhacheva,

Vatutina,

Nadeina

et al. 2024

Chim.Tech.Acta

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The paper describes in detail the procedure for the preparation of a granular bulk NiMoW catalyst and a supported reference NiMo/Al2O3 catalyst. Mention is made of investigations of the supported and bulk catalysts by various physico-chemical methods (nitrogen adsorption-desorption method, X-ray photoelectron spectroscopy, TPD-NH3, HRTEM and X-ray diffraction analysis). The experiments to estimate catalytic activity and compare rate constant of hydrodesulfurization of dibenzothiophene using both catalysts have been carried out. It is shown that textural properties of the catalysts significantly differ. The supported catalyst has more developed specific surface area and pore volume than the bulk catalyst. TPD-NH3 showed an increased acidity of the supported catalyst in comparison the bulk catalyst. It is shown by the X-ray photoelectron spectroscopy method that in both samples Mo on the surface is present exclusively in the form of Mo4+ ion. However, the bulk catalyst differs from the supported catalyst in that it contains a larger amount of Ni as part of the active NiMo(W)S phase. The catalytic activity tests demonstrated that the bulk catalyst is more active at 240, 250 and 260°C, it is discovered that the rate constant in hydrodesulfurization of dibenzothiophene for the bulk NiMoW catalyst is twice higher at 240ºC than that of the supported NiMo/Al2O3 catalyst.

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Enhanced hydrodesulfurization activity of thiophene over hollow tubular CoMo unsupported catalysts

Yang,

Song,

et al. 2024

Reac Kinet Mech Cat

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Effect of Zirconium modified Y zeolite via in situ synthesis and its regulation on the formation of excellent NiW catalyst for ultra-deep hydrodesulfurization of 4,6-DMDBT

Cited by 9 publications

References 81 publications

Ce-Doped Nanosheet as Visible Light Photocatalyst for the Photocatalytic Degradation of Tetracycline Hydrochloride

Ce-Doped Nanosheet as Visible Light Photocatalyst for the Photocatalytic Degradation of Tetracycline Hydrochloride

Comparison of the HDS DBT reaction using bulk and supported catalysts

Enhanced hydrodesulfurization activity of thiophene over hollow tubular CoMo unsupported catalysts

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