Bismuth oxyiodide coupled with bismuth nanodots for enhanced photocatalytic bisphenol A degradation: synergistic effects and mechanistic insight

Luo, Shuangling; Xu, Jinjia; Li, Zijing; Liu, Chen; Chen, Jiawei; Min, Xin; Fang, Minghao; Huang, Zhaohui

doi:10.1039/c7nr05320g

Cited by 49 publications

(16 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The band gap energies of the as‐prepared BiOCl 1‐ x Br x ( x = 0, 0.5, 1) were estimated using Tauc's equation αhν = A ( hν − E g ) 2 . The E g values of BiOCl, BiOCl 0.5 Br 0.5 and BiOBr are 3.37, 2.92 and 2.83 eV, respectively (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Given that the wide band gap energy (E g = 3.0-3.2 eV) of TiO 2 which could only response to UV light and limited its efficient utilization of solar light, searching for non-TiO 2 photocatalysts has become one of the most concerned subjects (1,2). Bismuth-based compounds have lately been found to be one of the promising photocatalysts due to their rich varieties, low or nontoxicity and good UV and visible light photocatalytic activity (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). Among these, bismuth oxyhalides (BiOX, X = Cl, Br and I) have demonstrated excellent photocatalytic activity because of their unique layered structures and internal static electric fields which could facilitate separation and transfer of photogenerated electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

Jia¹,

Han²,

Wang³

et al. 2018

Photochem & Photobiology

View full text Add to dashboard Cite

CH COO(BiO) (denoted as BiOAc) is one of the most easily obtained bismuth compounds and was for the first time proposed by our group as an effective UV light photocatalyst. Herein, BiOCl Br (x refers to the feeding atomic ratio) were obtained using a facile solid state milling and subsequent water washing. More importantly, all of the as-prepared BiOCl Br possessed better visible light photocatalytic activity to the corresponding ones obtained by previously reported solution route. Especially at an optimal x value of 0.5, the solid solution showed the highest photodegradation efficiency (~100%) for rhodamine B (RhB) with a concentration of 30 mg L , whereas the degradation efficiency was only 63% over that obtained by solution route. Furthermore, the as-prepared BiOCl Br also exhibited excellent photodegradation activity for malachite green (MG). The superior photocatalytic performance of the as-prepared BiOCl Br could be attributed to its thinner sheetlike structures and highly exposed (001) facets, which enable effective separation of the photogenerated electrons and holes along the [001] direction. In addition, the as-prepared BiOCl Br revealed dramatic adsorption capacity for cationic dyes like MG, RhB and methylene violet (MV), as well as anion (Cr O ) owing to electrostatic interaction between cationic dyes and negatively charged surface of BiOCl Br , and positively charged surface in K Cr O solution (pH ≈ 3).

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

Jia¹,

Han²,

Wang³

et al. 2018

Photochem & Photobiology

View full text Add to dashboard Cite

show abstract

“…Photocurrent characterization has been widely employed to display the charge separation in heterojunction photocatalysts. The higher peak density implies a higher separation efficiency of the photogenerated carriers, which usually plays a positive role in photoactivity promotion [38]. It can be seen that the photocurrent density of 0.2 Bi-BiOBr/BiPO 4 -3 composite increases sharply upon light irradiation and then rapidly decreases to zero when light is turned off.…”

Section: Resultsmentioning

confidence: 98%

“…It can be seen that a broad characteristic peak is located at 133.1 eV (Figure 2(e)), indicating the presence of PO 4 3in 0.2 Bi-BiOBr/BiPO 4 -3 composite [37]. The XPS spectrum of O 1s can be subdivided into two peaks at about 530.0 eV and 531.3 eV (Figure 2(d)), which are assigned to the lattice oxygen and the hydroxyl groups, respectively [36,38]. Based on XPS spectra and XRD results, it can be concluded that Bi-BiOBr/BiPO 4 composites are successfully fabricated.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 96%

Simple Fabrication of Visible Light-Responsive Bi-BiOBr/BiPO4 Heterostructure with Enhanced Photocatalytic Activity

Zhou

Chen

et al. 2021

Journal of Nanomaterials

View full text Add to dashboard Cite

A Bi-BiOBr/BiPO4 heterojunction structure was successfully synthesized via a two-step solvothermal method with ethylene glycol as a reducer. Little BiPO4 irregular polyhedrons and little metal Bi spherical nanoparticles were uniformly dispersed on the surface of BiOBr nanosheets with intimate contact and formed a heterojunction structure between BiPO4 and BiOBr. It was found that Bi-BiOBr/BiPO4 had a significant improvement in photocatalytic performance for RhB degradation compared to bare BiOBr and BiPO4. The photocatalytic degradation rate constant of 0.2-Bi/BiOBr/BiPO4 was 1.44 h-1, which was 3.8 times and 14.2 times more than that of bare BiOBr and BiPO4, respectively. This is attributed to the formation of a ternary heterojunction, which benefits the separation of photogenerated electron-hole pairs. Furthermore, with the introduction of metal Bi, the SPR effect of metal Bi can effectively improve the absorption ability of Bi-BiOBr/BiPO4 photocatalyst, resulting in enhanced photoactivity. In this work, the mechanism of photocatalytic degradation was studied by using the photochemical technique and the capture experiment of active species, and it was revealed that h+ and ⋅O2- played a major role in the photocatalytic process.

show abstract

“…Bismuth‐based semiconductor materials are widely recognized as visible‐light‐driven photocatalysts due to their good photochemical response to visible light . Among them, the bismuth molybdate family, including several phases in the Bi–Mo–O system, have been evaluated for environmental purification and remediation .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis of bismuth molybdates with controllable composition and their photocatalytic performance

Qian

Song

2018

J Am Ceram Soc

View full text Add to dashboard Cite

Bismuth molybdate photocatalysts were controllably prepared via an electrochemical approach at room temperature. The composition and optical property of each product were determined according to the NaOH and Na2MoO4 quantities in the electrolyte. Pure Bi3.64Mo0.36O6.55 was prepared at a NaOH concentration range of 0.2‐0.8 mol L−1, whereas the Bi3.64Mo0.36O6.55/Bi14MoO24 composite was obtained in an electrolyte containing 0.4 mol L−1 NaOH and 0.5 mol L−1 Na2MoO4. The results of rhodamine B degradation under visible light indicated that Bi3.64Mo0.36O6.55 nanoparticles with a size of 10‐50 nm displayed the best photocatalytic efficiency, which was considerably higher than that of composite one and bulk Bi3.64Mo0.36O6.55.

show abstract

Bismuth oxyiodide coupled with bismuth nanodots for enhanced photocatalytic bisphenol A degradation: synergistic effects and mechanistic insight

Abstract: Oxygen defects and acceleration of photoinduced charge migration were achieved simultaneously by the fabrication of BiOI with deposited Bi nanodots.

Cited by 49 publications

References 48 publications

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

Simple Fabrication of Visible Light-Responsive Bi-BiOBr/BiPO4 Heterostructure with Enhanced Photocatalytic Activity

Electrochemical synthesis of bismuth molybdates with controllable composition and their photocatalytic performance

Contact Info

Product

Resources

About

Bismuth oxyiodide coupled with bismuth nanodots for enhanced photocatalytic bisphenol A degradation: synergistic effects and mechanistic insight

Abstract: Oxygen defects and acceleration of photoinduced charge migration were achieved simultaneously by the fabrication of BiOI with deposited Bi nanodots.

Cited by 49 publications

References 48 publications

Milling‐Induced Synthesis of BiOCl1‐xBrx Solid Solution and Their Adsorptive and Photocatalytic Performance

Milling‐Induced Synthesis of BiOCl1‐xBrx Solid Solution and Their Adsorptive and Photocatalytic Performance

Simple Fabrication of Visible Light-Responsive Bi-BiOBr/BiPO4 Heterostructure with Enhanced Photocatalytic Activity

Electrochemical synthesis of bismuth molybdates with controllable composition and their photocatalytic performance

Contact Info

Product

Resources

About

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance

Milling‐Induced Synthesis of BiOCl_1‐xBr_x Solid Solution and Their Adsorptive and Photocatalytic Performance