Enhanced photocatalytic degradation performance of BiVO4/BiOBr through combining Fermi level alteration and oxygen defect engineering

Liu, Chun; Mao, Shuai; Shi, Mingxing; Hong, Xianyong; Wang, Dongting; Wang, Fengyun; Xia, Mingzhu; Chen, Qun

doi:10.1016/j.cej.2022.137757

Cited by 136 publications

(48 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dye molecules are typically designed to be environmentally stable, complex, and non-biodegradable, making them difficult to degrade or remove [ 1 , 2 ]. One of the interesting wastewater treatment strategies is photocatalytic degradation, a low-cost and effective method for pollutant transformation [ 3 , 4 , 5 , 6 , 7 ]. The photocatalytic degradation process requires semiconducting materials to act as a photocatalyst, which can be activated by absorbing the irradiated photons with an appropriate wavelength.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Wongrerkdee

Boonruang

et al. 2022

Toxics

View full text Add to dashboard Cite

ZnO and Ti-doped ZnO (Ti-ZnO) nanoparticles were synthesized using rapid combustion. The morphology of ZnO and Ti-ZnO featured nanoparticles within cluster-like structures. The ZnO and Ti-ZnO structures exhibited similar hexagonal wurtzite structures and crystal sizes. This behavior occurred because Zn2+ sites of the ZnO lattice were substituted by Ti4+ ions. The chemical structure characterization implied the major vibration of the ZnO structure. The physisorption analysis showed similar mesoporous and non-rigid aggregation structures for ZnO and Ti-ZnO using N2 adsorption–desorption. However, Ti-ZnO demonstrated a specific surface area two times higher than that of ZnO. This was a major factor in improving the photocatalytic degradation of methylene blue (MB). The photocatalytic degradation analysis showed a kinetic degradation rate constant of 2.54 × 10−3 min−1 for Ti-ZnO, which was almost 80% higher than that of ZnO (1.40 × 10−3 min−1). The transformation mechanism of MB molecules into other products, including carbon dioxide, aldehyde, and sulfate ions, was also examined.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Wongrerkdee

Boonruang

et al. 2022

Toxics

View full text Add to dashboard Cite

show abstract

“…These conditions are far from the purity of the dyes used in textile dyeing and the water quality of the effluent discharged. At the same time, the existence of other ions is proved to be harmful in photocatalysis [28]. This study demonstrates the solvothermal coupling method of TiO2 and g-C3N4 for PC degradation of a commercial AG-25, a textile dye used for fabric coloring in a saline water matrix, imitating the salinity and electrical conductivity of dye house effluents.…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 86%

Solvothermal Synthesis of g-C3N4/TiO2 Hybrid Photocatalyst with a Broaden Activation Spectrum

2022

View full text Add to dashboard Cite

A solvothermal self-made composite of graphitic carbon nitride (g-C3N4) and commercially available titanium dioxide (TiO2) demonstrated the removal of commercial acid green-25 (AG-25) textile dye in a saline water matrix when activated by ultraviolet (UV) and visible light. The g-C3N4-TiO2 composite was characterized by X-ray diffraction (XRD), Nitrogen sorption–desorption recording and modeling by the Brunauer–Emmett–Teller (BET) theory, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and electron spin resonance (ESR). The solvothermal process did not modify the crystalline structure of the g-C3N4 and TiO2 but enhanced the surface area by interlayer delamination of g-C3N4. Under a simulated solar spectrum (including UVA/B and vis wavelengths), the degradation rate of AG-25 by the composite was two and four times higher than that of TiO2 and pure g-C3N4, respectively (0.04, 0.02, and 0.01 min−1). Unlike TiO2, the g-C3N4-TiO2 composite was activated with visible light (the UV portion of the solar spectrum was filtered out). This work provides insight into the contribution of various reactive oxidative species (ROS) to the degradation of AG-25 by the composite.

show abstract

“…In Figure 5b, the Arc radius of P-CN x -1 is the smallest and the impedance is much smaller than that of CN, indicating that P-CN x -1 has higher charge transfer efficiency. [45] When the sample was excited by the 330 nm laser, a relatively broad PL emission peak appeared around 460 nm (Figure 5c). The www.advsustainsys.com emission peak of P-CN x -1 is shifted from 442 to 464 nm compared with CN, which confirms the formation of N defects.…”

Section: Photo and Electric Performance Analysismentioning

confidence: 99%

Mesoporous Ultrathin g‐C₃N₄ with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism

Song

Zhang

et al. 2022

Advanced Sustainable Systems

View full text Add to dashboard Cite

Metal‐free catalysts combined with a persulfate‐based advanced oxidation process (PS‐AOP) are considered to be a promising purification technology. In this study, porous thin layers of g‐C3N4 with nitrogen defects are synthesized by a simple method. Multiple characterization methods demonstrate the porous thin layer structure and the N defects of P‐CNx‐1. Photoelectrochemistry tests show that the combination of morphological modulation and defect engineering produces an excellent photocurrent response. The P‐CNx‐1/PS/Vis system shows the best tetracycline (TC) removal efficiency degrading 74.2% of TC within 90 min, and the degradation kinetics are significantly improved. Optimal degradation conditions such as catalyst dosage, persulfate (PS) dosage, initial TC concentration, and initial pH are investigated. Cyclic and anionic experiments demonstrate the excellent stability of P‐CNx‐1 and its ability to treat complex aqueous bases. Mechanistic experiments show that ˙OH/SO4˙−/˙O2−/h+/1O2 are all involved in the degradation of TC. Liquid chromatography‐mass spectrometry (LC‐MS) suggests possible degradation pathways for TC. This work aims to provide new ideas for the application of metal‐free g‐C3N4 in PS activation.

show abstract

Enhanced photocatalytic degradation performance of BiVO4/BiOBr through combining Fermi level alteration and oxygen defect engineering

Cited by 136 publications

References 71 publications

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Solvothermal Synthesis of g-C3N4/TiO2 Hybrid Photocatalyst with a Broaden Activation Spectrum

Mesoporous Ultrathin g‐C₃N₄ with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism

Contact Info

Product

Resources

About

Enhanced photocatalytic degradation performance of BiVO4/BiOBr through combining Fermi level alteration and oxygen defect engineering

Cited by 136 publications

References 71 publications

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Solvothermal Synthesis of g-C3N4/TiO2 Hybrid Photocatalyst with a Broaden Activation Spectrum

Mesoporous Ultrathin g‐C3N4 with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism

Contact Info

Product

Resources

About

Mesoporous Ultrathin g‐C₃N₄ with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism