Photo-induced dissolution of Bi2O3 during photocatalysis reactions: Mechanisms and inhibition method

Dou, Wenyue; Hu, Xingyun; Kong, Lingqian; Peng, Xianjia

doi:10.1016/j.jhazmat.2021.125267

Cited by 28 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The E g of the BO, CBO-3, and CBO/CQDs are determined from a plot of ( αhν ) 1/2 versus hν [ 55 , 56 ]. Therefore, the E g of BO, CBO-3, and CBO/CQDs are calculated as 2.73, 2.39, and 2.60 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ceftriaxone sodium degradation by carbon quantum dots (CQDs)-decorated C-doped α-Bi2O3 nanorods

Sun

Pan

Song

et al. 2023

Environmental Science and Ecotechnology

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Ceftriaxone sodium degradation by carbon quantum dots (CQDs)-decorated C-doped α-Bi2O3 nanorods

Sun

Pan

Song

et al. 2023

Environmental Science and Ecotechnology

View full text Add to dashboard Cite

“…Under UV irradiation, Bi 2 O 3 will be easily excited to produce h + and e − , as shown in Equation (). Next, O 2− in the crystal lattice will be oxidized by h + to produce O 2 according to the mechanisms for Bi 2 O 3 photocorrosion that we proposed previously, [ 40 ] leading to the generation of OVs. The detailed process is described as follows.…”

Section: Resultsmentioning

confidence: 99%

“…[35][36][37][38][39] In previous studies, we found that Bi 2 O 3 photocorrosion can be effectively weakened by modifications using polyaniline (PANI); meanwhile, the degradation efficiency of pollutants showed an obvious downward trend with increasing PANI content. [40] Given this information, further research on modifying Bi 2 O 3 is necessary to improve photocatalysis performance and photocorrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Antiphotocorrosion UV‐Bi₂O₃@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance

Dou

Kong

et al. 2022

Physica Status Solidi (a)

Self Cite

View full text Add to dashboard Cite

Low content of oxygen vacancy defects (OVs) and limited resistibility to photocorrosion are the core problems in the heterogeneous photocatalytic processes of bismuth oxide (Bi2O3). Herein, the strategy of “ultraviolet (UV) light‐inducing OVs” coupling with “polyaniline (PANI) combination inhibiting photocorrosion” is employed on the modification of Bi2O3. First, the high methylene blue (MB) degradation efficiency by UV3h‐Bi2O3@PANI0.5 wt% above 99.5% and the low Bi3+ dissolved concentration below 0.20 mg L−1 under visible light signify the high photocatalytic activity and stability. Then, the mechanisms for generation of OVs and inhibition of photocorrosion are proposed as follows. 1) Holes (h+) forming under irradiation, diffusing through the lattice, and reaching the surface of Bi2O3 can be regarded as a monatomic oxygen ion (OS−); 2) OS− combines and continues to be oxidized by h+, leading to the generation of O2 with the OVs left in the lattice; 3) UV‐Bi2O3 and PANI are excited to produce electrons/holes (e−/h+); 4) e−/h+ transfer in UV‐Bi2O3@PANI heterojunction leads to the separation of h+ from UV‐Bi2O3 and the inhibition of photocorrosion. Through the core problems being overcome, a new idea for the development and application of Bi2O3 with excellent performances in the field of water treatment is provided.

show abstract

“…However, semiconductor photocatalysts need to overcome disadvantages such as low light absorption rates, light quantum inefficiency, and high carrier recombination rates to meet the needs of further practical applications. Many efforts have focused on the exploration of high performance photocatalysts and the modification of visible-light-driven photocatalysts [8][9][10]. Some studies show that ion doping and substitution can optimize the crystal structure, adjust the bandgap, and effectively improve photocatalytic activity [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Zhang

Wang

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

The photocatalysis technique has been proven to be a promising method to solve environmental pollution in situations of energy shortage, and has been intensively investigated in the field of pollutant degradation. In this work, a band structure-controlled solid solution of BiOBrXI1−X (x = 0.00, 0.05, 0.10, 0.15, 0.20, 1.00) with highly efficient light-driven photocatalytic activities was successfully synthesized via simple solvothermal methods. The phase composition, crystal structure, morphology, internal molecular vibration, optical properties, and energy band structure were characterized and analyzed by XRD, SEM, HRTEM, XPS, Raman, and UV Vis DRS. To evaluate the photocatalytic activity of BiOBrXI1−X, rhodamine B was selected as an organic pollutant. In particular, BiOBr0.15I0.85 displayed significantly enhanced photocatalytic activity by virtue of modulating the energy band position, optimizing redox potentials, and accelerating carrier separation. Moreover, the enhancement mechanism was elucidated on the basis of band structure engineering, which provides ideas for the design of highly active photocatalysts for practical application in the fields of environmental issues and energy conservation.

show abstract

Photo-induced dissolution of Bi2O3 during photocatalysis reactions: Mechanisms and inhibition method

Cited by 28 publications

References 52 publications

Ceftriaxone sodium degradation by carbon quantum dots (CQDs)-decorated C-doped α-Bi2O3 nanorods

Ceftriaxone sodium degradation by carbon quantum dots (CQDs)-decorated C-doped α-Bi2O3 nanorods

Antiphotocorrosion UV‐Bi₂O₃@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance

Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Contact Info

Product

Resources

About

Photo-induced dissolution of Bi2O3 during photocatalysis reactions: Mechanisms and inhibition method

Cited by 28 publications

References 52 publications

Ceftriaxone sodium degradation by carbon quantum dots (CQDs)-decorated C-doped α-Bi2O3 nanorods

Ceftriaxone sodium degradation by carbon quantum dots (CQDs)-decorated C-doped α-Bi2O3 nanorods

Antiphotocorrosion UV‐Bi2O3@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance

Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Contact Info

Product

Resources

About

Antiphotocorrosion UV‐Bi₂O₃@PANI Photocatalyst Rich in Oxygen Vacancy Defects: Building Processes, Preparation Mechanisms, and Photocatalysis Performance