Journal of Water Process Engineering
·
2024
·
IF 6.3
Xiaoqing Wang,Cong Du,Yue Yu,Weiyi Li,Tuo Li,Siyuan Wang,Shanjun Mao,Yongjiang Wang,Junzi Zhao,Chunhua Xiong
Given the crucial impact of lattice matching on the charge-transfer efficiency and overall catalytic activity in heterojunctions, we pre-designed an α-Bi 2 O 3 /Co 3 O 4 photocatalytic system with high lattice matching to reduce dangling bonds and lattice mismatches in heterojunctions (A-axis: 2.77 %, B-axis: 0.86 %). The α-Bi 2 O 3 /Co 3 O 4 heterojunction was synthesized using a coprecipitation strategy and showed a wide optical absorption range, with enhanced absorption beyond 420 nm, and ideal photoelectrochemical responses (the highest current intensity: 0.26 μA (cm 2 ) −1 ). Under simulated sunlight irradiation, the heterojunction removed 97.30 % and 85.32 % of methylene blue and tetracycline, respectively, within 120 min. The degradation was corroborated by total organic carbon removal efficiencies, with methylene blue achieving 92.51 % and tetracycline 87.33 % within 120 min, indicative of the effective mineralization process. Our density functional theory calculations indicated that α-Bi 2 O 3 and Co 3 O 4 generated an internal electric field during the Fermi equilibrium process, which caused the conduction band electrons of α-Bi 2 O 3 to flow towards the valence band of Co 3 O 4 , forming a Z-scheme electron flow. Electrons and holes could be separated and transported in heterojunctions with low interface resistance and then react with dissolved oxygen to generate highly active OH and O 2 − radicals, which induced the efficient degradation of organic pollutants. We explored the key influence of structure on catalytic activity on lattice matching and analyzed the catalytic mechanism of α-Bi 2 O 3 /Co 3 O 4 heterojunctions in terms of charge properties. Our findings should serve as a crucial reference for developing excellent structured photocatalytic materials.
研究领域:
材料科学
·
环境科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Yuqi Cui,Li-chao Nengzi,Jianfeng Gou,Yan Huang,Bo Li,Xiuwen Cheng
Z-scheme heterojunction photocatalyst can simultaneously reduce the recombination of photo-generated electron-hole pairs and preserve its outstanding redox ability during the process of photocatalytic reaction. In this study, Z-scheme MIL-53(Fe)/α-Bi 2 O 3 /g-C 3 N 4 photocatalyst was successfully fabricated via an accessible method and comprehensive characterized by XRD, FT-IR, SEM, TEM, XPS, N 2 adsorption-desorption isotherms, UV–vis diffuse reflection spectroscopy and photoelectrochemical analysis. The as-obtained MIL-53(Fe)/α-Bi 2 O 3 /g-C 3 N 4 composite exhibited superior photocatalytic activity for amino black 10B degradation than that of pure g-C 3 N 4 , α-Bi 2 O 3 , MIL-53(Fe) and α-Bi 2 O 3 /g-C 3 N 4 binary composite under visible light irradiation and the photodegradation rate would achieve the maximum when the mass fraction of MIL-53(Fe) was 32% in ternary composite. The enhanced photocatalytic performance of MIL-53(Fe)/α-Bi 2 O 3 /g-C 3 N 4 ternary composite could be mainly ascribed to improved visible light absorption range and the construction of an effective interfacial heterojunction driven by direct solid-state dual Z-scheme mechanism, which significantly facilitates the separation and transfer of photo-generated charge carriers. Eventually, the as-prepared ternary composite was confirmed to have prominent stability and reusability after consecutive 4 recycling run.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 20
·8015-8027
·
IF 4.569
Zongyu Zhang,Xiuling Xue,Xiaoyi Chen
A novel ternary dual Z-scheme 2D g-C3N4 nanosheet/Ag3PO4/α-Bi2O3 (CNN/AP/BO) photocatalyst was successfully synthesized by an in situ deposition and hydrothermal–calcination method. The coupling of AP and BO remarkably enhanced the photocatalytic tetracycline (TC) degradation under visible light illumination, with an optimal removal efficiency of 91.6% (60 min), which can be attributed to the extended visible-light absorption and increased specific surface area owing to the interfacial intimate coupling with well-matched energy band positions between semiconductors. The improved photocatalytic activity resulted from the abundant free radicals by the order of ˙O2− > h+ > ˙OH based on the electron spin resonance (ESR) and quenching experiment results. In addition, the possible mechanism of TC degradation over the ternary dual Z-scheme heterojunction CNN/AP/BO was proposed.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Jing Zhao,Yangning Zhang,Tuo Wang,Peng Zhang
The electrochemical CO2 reduction reaction (CO2RR) provides a renewable avenue to convert CO2 to value-added fuels and chemicals. Bismuth (Bi)-based electrocatalysts are known as promising candidates for CO2RR to formate (HCOO–), yet their performance is frequently limited by structural reconstruction during operation, resulting in reduced activity and selectivity. This work describes a thermal treatment approach to tuning the catalytic chemistry of α-Bi2O3 for CO2RR. A thermally optimized Bi-400 electrocatalyst achieves a high Faradaic efficiency of 93.0% for HCOO– at −0.95 V vs RHE, along with good stability over 70 h. Through detailed structural and mechanistic studies, it is revealed that the preserved Bi–O motifs in Bi-400 facilitate CO2 activation and modulate the binding energy of the *OCHO intermediate, thereby enhancing both activity and selectivity toward HCOO– production. This study would provide an in-depth understanding of the selective formation of HCOO– products on Bi-based electrocatalysts in CO2RR.
✓ 已验证
DOI
PubMed
高影响因子
Journal of the Australian Ceramic Society
·
2018
·Vol. 55
·期 1
·71-76
·
IF 0.587
Du Xiaoni,Liu Yang,Wang Xiaohong,Feng Jingqing,Ren Chaofei
α-Bi 2 O 3 and β-Bi 2 O 3 nanoparticles were selectively synthesized via one-step solution combustion synthesis (SCS) using bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) as the oxidant and tartaric acid (C 4 H 6 O 6 ) as the fuel, and α/β-Bi 2 O 3 heterojunction was rapidly prepared by treating SCS β-Bi 2 O 3 powders with NaOH solution. The physical and chemical properties of as-prepared samples were characterized by XRD, SEM, TEM, PL, and UV-vis techniques. The formation of α/β-Bi 2 O 3 heterojunction can be proven by TEM, UV-vis diffuse reflectance spectra, and PL spectra results. The band gap energies of α-Bi 2 O 3 , β-Bi 2 O 3 , and α/β-Bi 2 O 3 measured by UV-vis diffuse reflectance spectra were estimated to be about 2.9, 2.48, and 2.7 eV, respectively. The PL spectra of α/β-Bi 2 O 3 heterojunction showed higher efficiency of charge separation and transfer across the α–β phase junction than those of α-Bi 2 O 3 and β-Bi 2 O 3 , leading to the enhancement of photocatalytic activity. The synthesized α/β-Bi 2 O 3 heterojunction can degrade 86% of rhodamin B (RhB) after 180 min under visible-light irradiation, better than those of pure α-Bi 2 O 3 (24%, 180 min) and pure β-Bi 2 O 3 (60%, 180 min). Consequently, α/β-Bi 2 O 3 heterojunction is a promising photocatalyst, which can be easily prepared by SCS and post-treatment of NaOH solution.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 4.6
Tianyuan Xiao,Xinyue Dong,Nan Yang,Yanming Zhang,Xiaoya Ding,Guangming Yin
To address the increasingly serious problem of antibiotic contamination, the hydrothermal method was employed to synthesize In 2 O 3 /α-Bi 2 O 3 photocatalysts. For tetracycline (TC) in aqueous solution, its photocatalytic degradation efficiency driven by visible light was systematically evaluated. The physical structure, optical properties and charge transfer of the composite materials were characterized and analyzed by XRD, PL and EIS. Nanoparticles In 2 O 3 was uniformly loaded on spindle-shaped α-Bi 2 O 3 , and the specific surface area increased to 17.08 m 2 /g. The composite material demonstrated a strong TC photodegradation ability, with a degradation efficiency of 86.99% (catalyst dosage = 30 mg, pH = 6, and initial TC concentration = 5 mg·L −1 ). The experimental results show that its excellent performance is attributed to the formation of heterojunctions, which have improved visible light absorption and efficient charge transfer. Free radical scavenger studies have confirmed that ·O₂ − and h + generated by photocatalysts account for the efficient degradation of TC, thus laying a foundation for the practical application of photocatalysts. This study innovatively constructs an In 2 O 3 /α-Bi 2 O 3 heterojunction with tailored loading ratio, which not only extends the visible-light response range but also promotes directional charge transfer, thus achieving superior photocatalytic degradation of tetracycline.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 6
·4265-4282
·
IF 4.682
Hu Wenna,Wu Fan,Liu Wei
The objective of this study was to construct the S-scheme Bi 2 WO 6 / α- Bi 2 O 3 heterojunctions with high enhanced visible-light photocatalytic performance. The composites loaded various Bi 2 WO 6 mass ratios were prepared by a ball grinding method. The characterization and reaction mechanism of photocatalysts were explored in detail. Remarkably, the results demonstrated that the Bi 2 WO 6 / α- Bi 2 O 3 presented an outstandingly superior performance for photodegradation of nitrobenzene. Among them, the 10%Bi 2 WO 6 / α- Bi 2 O 3 possessed the best photocatalytic property, and it could reach up to 95.7% in 50 min with the top rate constant of 0.06178 min −1 , which was 4.3 and 3.6 times that of bare Bi 2 O 3 and Bi 2 WO 6 , respectively. Simultaneously, the Bi 2 WO 6 / α- Bi 2 O 3 was well stable after five cycling experiments. The efficiently improved photocatalytic performance was primarily attributed to the formation of S-scheme structure between Bi 2 WO 6 and α- Bi 2 O 3 , which enhanced the conspicuous separating efficiency of photogenerated carriers. The present study not only offers a method to solve the unsatisfactory activity of Bi 2 O 3 , but also provides some insights into the design of other novel S-scheme composites with great potential application in clean energy and environmental remediation. Graphical abstract The efficiently improved photocatalytic performance was primarily attributed to the formation of S-scheme structure between Bi 2 WO 6 and α- Bi 2 O 3 , which enhanced the conspicuous separating efficiency of photogenerated carriers.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2015
·
IF 3.615
Lian-wei Shan,Gui-lin Wang,Li-zhu Liu,Ze Wu
In order to develop low-cost photocatalyst, commercial Bi 2 O 3 was utilized as raw material to prepare α-Bi 2 O 3 /BiOCl core-shell heterojunction via a facile in situ chemical transformation method. To clarify experimentally the band alignment relationships between the α-Bi 2 O 3 and BiOCl (0 0 1), the α-Bi 2 O 3 /BiOCl (0 0 1) core–shell heterojunction band offsets were analyzed by X-ray photoelectron spectroscopy (XPS). Here based on energy gaps, valence band values of α-Bi 2 O 3 and BiOCl (0 0 1), core levels difference of Bi 4f in α-Bi 2 O 3 /BiOCl (0 0 1) heterojunction , we demonstrate that band alignment of ∼0.28 eV exists between α-Bi 2 O 3 and BiOCl with α-Bi 2 O 3 possessing the higher valence band potential or electron affinity which is a driving force of valence band holes from α-Bi 2 O 3 to BiOCl (0 0 1). While, the electrons in conduction band were driven to migrate through conduction band potential difference (0.49 eV) from BiOCl (0 0 1) to α-Bi 2 O 3 .
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123628
·
IF 7.5
Yan Wang,Jiang Meng,Siyao Wang,Yuzi Yin,Tianyi Huang,Yue Wang,Jianyu Han
The development of efficient photocatalysts for antibiotic removal remains constrained by the lack of well-defined active sites and severe charge recombination. Herein, a nitrogen-vacancy-rich carbon nitride coupled with mixed-phase bismuth oxide (α-Bi 2 O 3 /β-Bi 2 O 3 /g-C 3 N 4 -nitrogen vacancies, denoted as N V -αβBO) was rationally constructed via NaBH 4 -assisted defect engineering and in-situ phase transformation. The optimized N V -αβBO-4 shows significantly enhanced photocatalytic performance under visible light and rapidly removes tetracycline hydrochloride (TCH). Systematic characterizations show that nitrogen vacancies facilitate O 2 adsorption and activation. Meanwhile, the interfacial coupling among α-Bi 2 O 3 , β-Bi 2 O 3 and defective g-C 3 N 4 (N V -CN-10) promotes directional charge transfer and suppresses carrier recombination. More importantly, a dual S-scheme charge-transfer pathway is established. This pathway preserves photogenerated electrons and holes with strong redox capability, thereby promoting reactive oxygen species (ROS) generation. This work demonstrates a synergistic strategy by integrating defect engineering with phase-junction construction, providing new insights into the design of high-performance photocatalysts for antibiotic wastewater treatment.
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xiangta Xie,Yuyan Feng,Dongbo Wang
A novel in-situ grown α-Bi 2 O 3 /Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction (BBCx) was successfully fabricated via a two-step in-situ growth by a simple solvothermal calcination method. In this process, g-C 3 N 4 served as the substrate for the growth of Bi 2 O 2 CO 3 nanoplates, while Bi 2 O 2 CO 3 acted as the substrate for the subsequent growth of α-Bi 2 O 3 nanoplates. By characterizing the nanocomposite using different techniques, it was confirmed that the components of this ternary material are tightly bonded through heterojunction formation. Photocatalytic tests demonstrated that the composite exhibited higher activity than pure α-Bi 2 O 3 , Bi 2 O 2 CO 3 and g-C 3 N 4 . Among the composite materials, BBC400—obtained by solvothermal treatment followed by calcination at 400 °C for 2 h—exhibited the highest degradation efficiency toward tetracycline hydrochloride (TC-HCl), with a removal rate of 70% of TC-HCl within 120 min and a rate constant of 0.0081 min −1 . This rate constant was approximately 16.2 times (0.0005 min −1 ), 1.92 times (0.0042 min −1 ) and 1.35 times (0.006 min −1 ) higher than those of pure Bi 2 O 2 CO 3 , g-C 3 N 4 and α-Bi 2 O 3 , respectively. This synthesis approach offers a new strategy for the in-situ construction of heterojunction nanocomposites.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）