Gas sensing properties of nanostructured bismuth oxychloride

Michel, Carlos R.; Contreras, Narda L. López; Martínez-Preciado, Alma H.

doi:10.1016/j.snb.2011.07.047

Cited by 48 publications

(26 citation statements)

References 28 publications

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“…This layered structure is better for the separation of photogenerated carriers [22,23]. Moreover, BiOCl is a typical p-type semiconductor with low Femi energy level [24,25]. Therefore, formation of p-n heterojunction between p-BiOCl and n-titanium phosphate would induce a strong internal electric field which suppresses recombination of photo-generated charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Bismuth oxychloride modified titanium phosphate nanoplates: A new p-n type heterostructured photocatalyst with high activity for the degradation of different kinds of organic pollutants

Bao

Wang

et al. 2016

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Bismuth oxychloride modified titanium phosphate nanoplates: A new p-n type heterostructured photocatalyst with high activity for the degradation of different kinds of organic pollutants

Bao

Wang

et al. 2016

Journal of Colloid and Interface Science

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“…This layered structure is better for the separation of photogenerated carriers [12,13]. Moreover, BiOCl is a p-type semiconductor [14,15], which indicates that it has a low Femi energy level. When forming heterojunction of p-BiOCl/n-TiO 2 , there would result in a strong internal electric field which facilitates the reducing probability of recombination of photogenerated charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical heterostructures of p-type BiOCl nanosheets on electrospun n-type TiO2 nanofibers with enhanced photocatalytic activity

Wang

Shao

et al. 2015

Catalysis Communications

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“…[1][2][3][4][5] Recently, the application of BiOCl materials in photocatalysis has been widely demonstrated, and found to exhibit highly efficient capabilities to decompose organic wastewater contaminants. [1][2][3][4][5] Recently, the application of BiOCl materials in photocatalysis has been widely demonstrated, and found to exhibit highly efficient capabilities to decompose organic wastewater contaminants.…”

mentioning

confidence: 99%

Facile and Rapid Oxidation Fabrication of BiOCl Hierarchical Nanostructures with Enhanced Photocatalytic Properties

Xiong

Jiao

Lü

et al. 2013

Chemistry A European J

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Bismuth oxyhalides, especially bismuth oxychloride (BiOCl), have attracted considerable interest due to their novel properties and extensive applications in heterogeneous catalysis, pigments, nanodevices and nanosensors. [1][2][3][4][5] Recently, the application of BiOCl materials in photocatalysis has been widely demonstrated, and found to exhibit highly efficient capabilities to decompose organic wastewater contaminants. [6,7] Furthermore, it has been shown that their photocatalytic activities greatly depend on the morphology, structure, and exposed planes. [8][9][10][11] Thus, much effort has been devoted to exploring novel synthetic strategies for fabricating both shape-and dimension-controlled BiOCl nanoproducts. More specifically, various BiOCl nanostructures with both high yields and quality, including 0D nanoparticles, 1D nanowires and nanofibers, 2D nanoplates and nanosheets, have been successfully fabricated by diverse techniques and their photocatalytic properties have been extensively explored. [10][11][12][13][14][15][16][17] Recently, the rational synthesis of BiOCl 3D hierarchical nanoproducts have become of particular interest because these novel nanostructures assembled with different building blocks exhibit excellent photocatalytic activity as a result of their large surface area and lightharvesting efficiency. [7-9, 18, 19] However, the reported techniques for fabricating well-defined BiOCl 3D hierarchical structures generally suffer from the drawbacks of high temperature, long reaction times, surfactants, and toxic organic solvents, which greatly restrict their further development and practical applications. Thus, the exploration of facile, mild, and effective routes for rational synthesis of 3D BiOCl hierarchical nanostructures may greatly improve their current performance and open up new applications.Herein, we demonstrate a rapid and general in situ oxidation procedure for fabricating 3D flower-like BiOCl hierarchical nanostructures by simply reacting metallic Bi nanospheres and FeCl 3 aqueous solution at room temperature. More specifically, in the presence of Cl À ions, the redox potential of Bi species could effectively be reduced from + 0.308 V (Bi 3 + /Bi vs. SHE) to + 0.16 V (BiOCl/Bi). Thereby, Fe 3 + ions (E 0 Fe 3þ =Fe 2þ = + + 0.771 V) could rapidly oxidize the surface atoms of Bi nanopheres into BiOCl 2D nanofilms and the final 3D hierarchical nanostructures. Moreover, these novel nanosamples exhibit much higher photocatalytic activity and photoelectric property than commercial BiOCl materials. Figure 1 A and B show the typical scanning electron microscope (SEM) images of metallic Bi nanoproducts prepared by solvothermal method; these serve as the starting materials for the subsequent in situ oxidation synthesis of BiOCl nanoproducts. As can be seen, before the oxidation reaction, the Bi nanospheres possess relatively smooth surfaces and an average diameter of about 200 nm. However, when the as-synthesized Bi nanospheres were treated with the aqueous FeCl 3 solution at room tempe...

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Gas sensing properties of nanostructured bismuth oxychloride

Cited by 48 publications

References 28 publications

Bismuth oxychloride modified titanium phosphate nanoplates: A new p-n type heterostructured photocatalyst with high activity for the degradation of different kinds of organic pollutants

Bismuth oxychloride modified titanium phosphate nanoplates: A new p-n type heterostructured photocatalyst with high activity for the degradation of different kinds of organic pollutants

Hierarchical heterostructures of p-type BiOCl nanosheets on electrospun n-type TiO2 nanofibers with enhanced photocatalytic activity

Facile and Rapid Oxidation Fabrication of BiOCl Hierarchical Nanostructures with Enhanced Photocatalytic Properties

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