The {001} facets-dependent high photoactivity of BiOCl nanosheets

Ye, Liqun; Zan, Ling; Tian, Lihong; Peng, Tianyou; Zhang, Jiujun

doi:10.1039/c1cc11015b

Cited by 586 publications

(380 citation statements)

References 23 publications

(5 reference statements)

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“…(001) of diffraction intensity exhibits a decreased peak in all the powders related to (110) which is along the c-axis and it forms thin slabs. [40,41] FE-SEM was used to assess the morphologies of the synthesised products ( Figure 2). BiOCl without PVP (Figure 2(a)) consisted of round, large particles.…”

Section: Structure and Morphologymentioning

confidence: 99%

Size-controlled BiOCl–RGO composites having enhanced photodegradative properties

Kang

Pawar

Pyo

et al. 2015

Journal of Experimental Nanoscience

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Visible light-active bismuth oxychlorideÀreduced graphene oxide (BiOClÀRGO) composite photocatalysts were synthesised using a hydrothermal method at low temperature, and at a low cost. This approach reduced the recombination of electronÀhole pairs and thereby provided more efficient photocatalysts. The size of BiOCl structure was controlled by polyvinylpyrrolidone (PVP) addition. Furthermore, formation of nanosized BiOCl sheets and BiOClÀRGO composites were confirmed by X-ray diffraction, X-ray photoelectron spectroscopy, fieldemission scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. Fabricated BiOClÀRGO composite with PVP exhibited better photocatalytic activity than pure BiOCl grown with and without PVP towards degradation of Rhodamine B (RhB). It was found that the composite photocatalyst degrades RhB completely within 310 min as compared with several hours for pure BiOCl. The improved photocatalytic performance of BiOClÀRGO composite was attributed to its high specific surface area (22.074 m 2 g ¡1 and existence of polar surfaces, compared with 9.831 m 2 g ¡1 for pure BiOCl). The analyses indicated that RGO helped to reduce recombination losses and improve electron transport. It also showed that presence of polar surfaces improved photocatalytic activity of BiOCl. Hence, BiOClÀRGO composite is a promising catalyst for the degradation of organic pollutants under visible light and could be used in applications such as water purification devices.

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Section: Structure and Morphologymentioning

confidence: 99%

Size-controlled BiOCl–RGO composites having enhanced photodegradative properties

Kang

Pawar

Pyo

et al. 2015

Journal of Experimental Nanoscience

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“…The band at 510 cm ¹1 corresponds to the symmetrical stretching vibration of BiO. 23) When the content of BiOBr in hybrid photocatalyst increases, the strength of absorption peak at 510 cm ¹1 increases, and the strength of absorption peak at 810, 12621941 and 2161 cm ¹1 decreases. The light absorption properties of the as-prepared samples were characterized by UVvis diffuse reflectance spectroscopy.…”

Section: ¹1mentioning

confidence: 99%

Enhanced visible-light photocatalytic activity of C3N4/BiOBr for organic dye decomposition by using graphitic C3N4 synthesized via ionothermal copolymerization

Han

Ren

Xiao

et al. 2016

J. Ceram. Soc. Japan

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Modified graphitic C 3 N 4 was synthesized by the ionothermal copolymerization method and composited with BiOBr by waterbath heating. The microstructure, specific surface area, photocatalytic activity and optical property of the resulting hybrid photocatalysts were characterized. The results showed that layered BiOBr was formed on the surface of modified graphitic C 3 N 4 nanoparticles. The modified graphitic C 3 N 4 /BiOBr hybrid photocatalysts had a higher specific surface area than that of BiOBr and show a broad response range under visible light. The synergetic effect between the two semiconductors was more favorable for the separation of electronhole pairs. Rhodamine B solution can be effectively degraded using the hybrid photocatalysts. When the weight ratio of modified graphitic C 3 N 4 in the hybrid photocatalyst was up to 50%, the photocatalyst showed the best activity. Photocurrent testing indicated that the recombination of photo-generated electronhole pairs was inhibited. The photocatalyst showed a good stability by a cycling experiment.

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“…Light between the semitransparent BiOCl flakes is reflected and multiplied, creating an impressive deep luster characteristic of natural pearls (6). The layered structure provides a large enough space to polarize the related atoms and orbitals, and then induces the presence of internal static electric fields perpendicular to the [Bi 2 O 2 ] slabs and halogen anionic slabs in BiOCl (7,8). Owing to the unique layered structure and high photo-corrosion stabilities in the presence of redox pairs, BiOCl has been used as a novel material for photocatalysts (6).…”

Section: Introductionmentioning

confidence: 99%

“…Among the diverse photocatalytic materials, BiOCl is mostly studied because of its unique layered structure and high chemical stability, a great deal of research has been conducted to study its photocatalytic performance under UV irradiation (4,5). The tetragonal bipyramidal crystal geometry of BiOCl can be usually flattened into flakes or platelets with a high aspect ratio.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photo-induced Charge Separation and Simulated Solar Photocatalytic Activity of α-Fe2O3/BiOCl Prepared In-situ

Liu

Zhong

et al. 2015

Journal of Advanced Oxidation Technologies

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Abstract:In this paper, α-Fe 2 O 3 /BiOCl composites were in-situ prepared by a hydrothermal routine and characterized by BET surface area, X-ray diffraction (XRD), UV/Vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM) and surface photovoltage spectroscopy (SPS), respectively. The separation efficiency of photo-induced charges was investigated using benzoquinone (BQ) as scavenger. The relationship between α-Fe 2 O 3 loading and the photocatalytic performance was investigated. When the molar ratio of Fe/Bi is 1/3, the composite material exhibits higher photocatalytic performance than the pure α-Fe 2 O 3 and BiOCl towards decolorization of Methyl Orange (MO) aqueous solution under the simulated sun light irradiation. The enhanced mechanism was also discussed.

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The {001} facets-dependent high photoactivity of BiOCl nanosheets

Abstract: BiOCl nanosheets (BiOCl NSs) were synthesized by hydrolyzing a hierarchical flowerlike molecular precursor (Bi(n)(Tu)(x)Cl(3n), Tu = thiourea). High photoactivity of {001} facets of BiOCl NSs was observed, and the mechanism was discussed.

Cited by 586 publications

References 23 publications

Size-controlled BiOCl–RGO composites having enhanced photodegradative properties

Size-controlled BiOCl–RGO composites having enhanced photodegradative properties

Enhanced visible-light photocatalytic activity of C<sub>3</sub>N<sub>4</sub>/BiOBr for organic dye decomposition by using graphitic C<sub>3</sub>N<sub>4</sub> synthesized via ionothermal copolymerization

Enhanced Photo-induced Charge Separation and Simulated Solar Photocatalytic Activity of α-Fe2O3/BiOCl Prepared In-situ

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