Synthesis of BiOCl nanosheets with oxygen vacancies for the improved photocatalytic properties

Cai, Yujie; Li, Dongya; Sun, Jingyu; Chen, Mengdie; Li, Yirui; Zou, Zhongwei; Zhang, Hua; Xu, Haiming; Xia, Dongsheng

doi:10.1016/j.apsusc.2018.01.089

Cited by 110 publications

(33 citation statements)

References 38 publications

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“…Figure d express two peaks at 530.41 and 532.27 eV, which can correspond to Bi–O bonds of BOCBuv and the surface OVs, respectively . Figure e exhibits two peaks located at 198.27 and 199.87 eV, which can be attributed to Cl 2p 3/2 and Cl 2p 1/2 …”

Section: Resultsmentioning

confidence: 94%

BiOCl/BiOBr Heterojunction with Rich Oxygen Vacancies Induced by Ultraviolet and Its Enhanced Photocatalytic Performance

Liu

et al. 2019

Eur J Inorg Chem

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Novel BiOCl/BiOBr heterojunction with rich oxygen vacancies (OVs) was successfully synthesized via ultrasound and photoinduced method. The XRD, SEM, TEM, XPS, DRS, ESR, SPV, PL, contact angle and electrochemical technique were implemented to characterize the as‐synthesized samples. The experiment results demonstrated that BOCBuv can degrade carbamazepine (2.5 mg/L) by nearly 60 % during 180 min under visible light irradiation, which is 2, 3, 7 times higher than that of BOCB, BOC and BOB, respectively. Furthermore, the presence of OVs and heterojunction structure not only enhance the light absorption but also improve the spatial separation and migration of photogenerated carriers, and thus BOCBuv exhibits polish photocatalytic performance. This research provides a new approach and insight for developing novel efficiency photocatalysts by tailoring surface defects and heterojunction structure.

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Section: Resultsmentioning

confidence: 94%

BiOCl/BiOBr Heterojunction with Rich Oxygen Vacancies Induced by Ultraviolet and Its Enhanced Photocatalytic Performance

Liu

et al. 2019

Eur J Inorg Chem

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“…Among the lanthanide ions, the catalytic properties of cerium have received much attention due to the alteration of Ce oxidation state between Ce 3+ with 4 f 1 5 d 0 and Ce 4+ with 4 f 0 5 d 0 , which brings about excellent oxygen mobility . Furthermore, the change in the valence state of cerium ion (Ce 4+ to Ce 3+ ) is always along with the variation in the amount of oxygen vacancies (OVs) and adsorbed oxygen . It is well known that adsorbed oxygen and oxygen vacancy play a significant role in photocatalysis, so enhancing the proportions of oxygen vacancy and chemisorbed oxygen species is a key issue to improve photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Quan

Shi

et al. 2020

ChemistrySelect

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The photocatalysts Bi 2 O 3 :Ce 3 + /Ce 4 + (cerium content 0.2, 0.5, 0.8, and 1.1 wt. %) were prepared via one-pot ethylene glycolassisted solvothermal method. The prepared x Ce-Bi 2 O 3 (x = 0.5, 0.8, 1.1) samples present δ-Bi 2 O 3 phase with space group of Fm-3 m at room temperature, which indicates that the hightemperature cubic phase could be stabilized via Ce doping in Bi 2 O 3 lattices. Moreover, the addition of Ce 3 + /Ce 4 + could change the amount of oxygen vacancies (OVs) and adsorbed oxygen on the surface of photocatalysts. The existence of oxygen vacancies and adsorbed oxygen facilitated the generation of superoxide radicals () and hydroxide radicals (), which were the dominant reactive oxygen species for phenol degradation. The photocatalyst containing 0.8 wt. % cerium presented the highest photoactivity than the other synthesized samples. A photodegradation mechanism is proposed based on scavenger and electron spin resonance studies.[a] T.

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“…[4] Moreover, well-dispersed Bi 6 s orbital facilitates the effective separation of electron-hole pairs and decreases the band gap, the forbidden band width of Bi-based semiconductor photocatalysts is usually less than 3.0 eV. [5] As for the currently popular bismuth-based photocatalytic materials Bi 2 O 3 , [6][7][8][9] BiPO 4 , [10][11][12][13][14] Bi 2 MO 6 (M = Mo and W), [15][16][17][18][19][20] BiVO 4 and BiOX (X = Cl, Br and I), [21][22][23][24][25][26][27][28][29][30][31] they possess suitable band gaps and high photocatalytic activity. Among them, the easily synthesized BiOCl semiconductor has anisotropic layered structures with [Bi 2 O 4 ] 2 + layers intercalated by Cl À ions which are beneficial for reducing the recombination of photogenerated electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Direct Z‐Scheme CdSe/BiOCl Heterojunctions for Enhanced Photocatalytic Performance

et al. 2020

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The introduction of heterojunctions is an effective way to improve catalytic activity in photocatalytic composites. Herein, a series of CdSe quantum dot-modified BiOCl heterojunction composites were successfully prepared by a green in-situ deposition protocol. Photocatalytic ability of CdSe/BiOCl composite can be simply tailored by adjusting CdSe amount. The obtained CdSe/BiOCl composites showed superior photodegradation capability and excellent stability. The optimum BiOCl composite with 1.0% CdSe modification exhibited a 1.5 times higher degradation rate than pure BiOCl nanosheets, and photodegradation efficiency maintains still high after four cycles. Physical characterization confirms the formation of heterostructure, while electrochemical impedance spectroscopy and photoluminescence spectrum demonstrate composite with higher separation efficiency of photo-generated electron-hole pairs. At last, the heterojunction of Z-Scheme satisfies the photocatalytic mechanism of CdSe/BiOCl, and the holes (h + ) with superoxide radicals (⋅O 2 À ) are the main active factors in photodegradation process based on the experiment of scavengers.[a] Dr. Figure 8. Effect of scavengers on the photodegradation of Rh B over 1% CdSe/BiOCl.Figure 9. Photocatalytic mechanism of CdSe/BiOCl heterojunction composite.

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Synthesis of BiOCl nanosheets with oxygen vacancies for the improved photocatalytic properties

Cited by 110 publications

References 38 publications

BiOCl/BiOBr Heterojunction with Rich Oxygen Vacancies Induced by Ultraviolet and Its Enhanced Photocatalytic Performance

BiOCl/BiOBr Heterojunction with Rich Oxygen Vacancies Induced by Ultraviolet and Its Enhanced Photocatalytic Performance

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Green Synthesis and Direct Z‐Scheme CdSe/BiOCl Heterojunctions for Enhanced Photocatalytic Performance

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Synthesis of BiOCl nanosheets with oxygen vacancies for the improved photocatalytic properties

Cited by 110 publications

References 38 publications

BiOCl/BiOBr Heterojunction with Rich Oxygen Vacancies Induced by Ultraviolet and Its Enhanced Photocatalytic Performance

BiOCl/BiOBr Heterojunction with Rich Oxygen Vacancies Induced by Ultraviolet and Its Enhanced Photocatalytic Performance

Photocatalytic Activity of Bi2O3 Enhanced by the Addition of Ce3+/Ce4+ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Green Synthesis and Direct Z‐Scheme CdSe/BiOCl Heterojunctions for Enhanced Photocatalytic Performance

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Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method