KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2023
·Vol. 40
·期 5
·1122-1132
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IF 2.7
Hua Weijie,Kang Yong
A coupling method of water surface plasma (WSP) with β -Bi 2 O 3 /CaFe 2 O 4 composite was applied to promote the elimination of aqueous Orange G (OG). The morphology, structures, crystal form and chemical bonding state of the prepared β -Bi 2 O 3 /CaFe 2 O 4 composite were characterized via SEM, TEM, EDS-mapping, XRD, FT-IR and XPS. The results showed that the addition of composites significantly enhanced the degradation and kinetic constant of OG. The degradation efficiency of the combined system containing 8.0 wt% β -Bi 2 O 3 /CaFe 2 O 4 composite was 28.9% higher compared to the sole WSP for OG degradation. The synergistic factor (2.387) demonstrated that the combined system was able to establish a synergistic effect. The effect including peak voltage, air flow rate, initial conductivity and initial concentration of solution on OG removal was inspected. The active species trapping experiments demonstrated ·OH, h + , ·O
− 2
and high-energy electrons devoted to OG removal in the combined system. O 3 and H 2 O 2 were also involved in the OG removal in the combined system. Three-dimensional fluorescence spectroscopy and liquid chromatography-mass spectrometry were tested to investigate the mechanism of OG degradation. Finally, the combined system in the present study was compared with other competitive technologies for the degradation of OG in the literature.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2023
·Vol. 25
·期 19
·13474-13486
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IF 3.3
Xin Guan,Xiao-li Wang,Xue-wen Zhu,Hui Yu,Ming Yang,Xiang-ting Dong,Ying Yang,Long Xia
β-Bi2O3 demonstrates excellent photocatalytic activity under visible light, but it has a very high photogenerated e−–h+ recombination rate and quite low quantum efficiency. AgBr also shows excellent catalytic activity but Ag+ is easily reduced to Ag under light radiation, which limits its application in the photocatalysis field, and there are few reports about the application of AgBr in photocatalysis. In this study, the spherical flower-like porous β-Bi2O3 matrix was first obtained, and then the spherical-like AgBr was embedded between the petals of the flower-like structure to avoid direct light radiation. The only light through the pores on the β-Bi2O3 petals could be transmitted onto the surfaces of AgBr particles to form a nanometer point light source, which photo-reduced Ag+ on the surface of the AgBr nanospheres to construct the Ag-modified AgBr/β-Bi2O3 embedded composite and a typical Z-scheme heterojunction was constructed. Under this bifunctional photocatalyst and visible light, the RhB degradation rate reached 99.85% in 30 min, and the photolysis water hydrogen production rate reached 6.288 mmol g−1 h−1. This work is as an effective method for not only the preparation of the embedded structure, quantum dot modification and flower-like morphology but also for the construction of Z-scheme heterostructures.
研究领域:
材料科学
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光催化
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环境化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Chaogang Ban,Yang Wang,Jiangping Ma,Yajie Feng,Junjie Ding,Youyu Duan,Xue Liu,Bin Zhang,Jinjing Tang,Xiaoping Tao,Liyong Gan,Shuangshuang Tan,Xiaoyuan Zhou
Rational fabricating advanced photocatalysts to recycle CO 2 into solar fuel is one of the most promising approaches to simultaneously address energy shortages and global warming. TiO 2 has been widely used in photocatalytic CO 2 reduction due to its abundant reserves, non-toxicity and harmlessness etc. However, it remains significantly challenging for practical applications due to the fast electron-hole recombination. Herein, we design a direct TiO 2 based Z-Scheme heterojunction by self-assembly of C-doped TiO 2 nanoparticles on 3D hierarchical petal of flower-like β-Bi 2 O 3 (C-TiO 2 /β-Bi 2 O 3 ). In situ electron paramagnetic resonance tests, in situ X-ray photoelectron spectroscopy and theoretical calculations reveal that electrons are transferred from β-Bi 2 O 3 to C-TiO 2 due to the formation of Z-Scheme heterojunction, which greatly accelerates the separation of photogenerated carriers to promote efficient CO 2 photoreduction. Ultimately, the optimal heterojunction shows significantly enhanced photocatalytic activity for CO 2 reduction to CO (31.07 μmol g –1 h −1 ) compared to the pure TiO 2 (3.28 μmol g –1 h −1 ) without using any photosensitizers and sacrificial agents. This work provides a unique insight to design direct Z-Scheme heterojunctions and delivers a promising photocatalyst for overcoming global warming and energy-supply issues.
研究领域:
材料科学
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环境科学
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化学工程
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光催化
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Kun Ge,Yihong Huang,Hanqiang Zhang
In this paper, we report a novel surface-enhanced Raman spectroscopy (SERS) substrate based on hierarchical β-Bi 2 O 3 /Au 2 Ag 2 microspheres for rapid, sensitive and selective detection of environment pollutants including o -dianisidine ( o -diASD) and Hg 2+ in environmental samples. The sheet-like β-Bi 2 O 3 not only provides large specific surface areas for adsorption of molecules and AuAg, but also emerges as semiconductor matrix with chemical enhancement combined with AuAg with electromagnetic enhancement, making promising SERS activity. Particularly, the β-Bi 2 O 3 /Au 2 Ag 2 shows high SERS performance for 4-mercaptobenzoic acid and TMB with minimum detectable concentration of 0.1 μg/L with enhancement factor of 3.1 × 10 7 and 6.3 × 10 7 , respectively. The density functional theory simulations were further adopted to explain the high SERS activity and selectivity for o -diASD and TMB. Finally, the β-Bi 2 O 3 /Au 2 Ag 2 was applied to direct detection of o -diASD, and indirect detection of Hg 2+ by TMB marking in environmental samples. The linearity range of 0.5–200.0 and 0.2–500.0 μg/L with limit of detection of 0.2 and 0.07 μg/L for o -diASD and Hg 2+ ions can be achieved, respectively. This method provides a novel strategy in designing and fabricating SERS substrates with high performance for rapid, sensitive and accurate analysis of environmental pollutants.
研究领域:
环境科学
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分析化学
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材料科学
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纳米技术
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DOI
PubMed
高影响因子
Reaction Chemistry & Engineering
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2026
·
IF 3.1
Tianyuan Xiao,Xinyue Dong,Yong Li,Xiaoya Ding,Guangming Yin
Non-stoichiometric bismuth oxyhalides represent a category of semiconductor photocatalysts with extensive application potential. Herein, Bi2O3, Bi12O17Cl2, and Bi12O17Cl2/β-Bi2O3 microsphere materials were prepared through the calcination. The photocatalytic degradation performance of Bi12O17Cl2/β-Bi2O3 composite microspheres on methylene blue (MB) simulated wastewater under visible light was investigated. The results indicate that the photocatalytic degradation efficiency of MB can reach up to 91.50% in a 10 mg/L solution by Bi12O17Cl2/β-Bi2O3 composite microspheres. The photocatalytic mechanism of Bi12O17Cl2/β-Bi2O3 was explored using free radical trapping experiments, UV-vis DRS, and Nyquist curve analysis, revealing that the material forms a type II heterostructure. This work presents a novel perspective on the design of advanced coupledsemiconductor materials for the degradation of organic pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Peng Wang,Su-Zhen Wang,Ya-Ru Kang,Zhong-Sen Sun,Xue-Dong Wang,Yu Meng,Ming-Hui Hong,Wan-Feng Xie
Gas sensors based on metal oxide semiconductors have attracted great interest in the sensing of organic volatile compounds gas due to their easy fabrication, effective cost, and good stability. Herein, we rationally design ethanol gas sensors based on p -Bi2O3 and n -ZnO heterostructure with clear interfaces, which exhibit excellent response of 21.6 towards 100 ppm ethanol, wide concentration detection range from 1 to 500 ppm, working temperature as low as 175 °C, short response time of 7 s, and recovery time of 8 s at 100 ppm of ethanol. Moreover, the selectivity of Bi2O3/ZnO sensor towards ethanol is much better than that of other organic volatile gases. The relationship between the origin of superior sensing performances towards ethanol and the sharp interfaces of p -Bi2O3/ n -ZnO heterostructure are also systematically investigated. On the other hand, it is also demnostrated that the tetragonal phase β -Bi 2 O 3 has positive effect on the sensing performance of Bi 2 O 3 /ZnO composite.
研究领域:
材料科学
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化学
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2016
·
IF 4.012
Yangyang Zhang,Yiping Guo,Bijun Fang,Yujie Chen,Huanan Duan,Hua Li,Hezhou Liu
BiO 2 CH 3 nanoplate, a new organometallic crystal, with octagonal morphology is successfully prepared using methanol solvothermal method and further employed as template to fabricate porous β-Bi 2 O 3 octagonal nanoplates with a thickness of less than 50 nm. Then a series of hierarchical octagonal haystack-like β-Bi 2 O 3 /Bi 2 S 3 hybrids with large heterointerface and small bandgaps (1.36–1.44 eV) are constructed. It is found that, different from many regular photocatalysts that suffer from shrink of photocatalytic efficiency, the photoactivities of all β-Bi 2 O 3 /Bi 2 S 3 heterostructures are continuously enhanced with growing test cycles, owing to the formation of Bi 2 O 3− x S x solid solution, in which the built-in electric filed induced by lattice distortion can brings about higher e − /h + separation efficiency. The gradually increasing photocatalytic activity can reach to an up limit in about 5 photocatalytic cycles and maintain at this level. β-Bi 2 O 3 /Bi 2 S 3 heterostructure loaded with 20 mol% of Bi 2 S 3 is demonstrated to be the best photocatalyst and capable of fully decomposing Rh B in 30 min. Our work provides deep insights into the nature of the inversed photocatalytic behavior and facilitates the advanced design of photocatalysts with unabated photoactivities.
研究领域:
材料科学
·
光催化
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Chao Wang,Baokang Dang,Hanwei Wang,Yipeng Chen,Yushan Yang,Yingying Li,Ye Xiong
The assembly of heterogeneous photocatalysts with unique structures by 2D heterojunctions is an advanced strategy for efficient solar energy conversion. However, heterogeneous photocatalysts constructed from 2D materials will suffer from high photogenerated charge recombination and low light absorption due to the arbitrary stacking and weak bonding of lamellae. Here, flower-like Bi 4 O 5 I 2 / β -Bi 2 O 3 (FL-Bi 4 O 5 I 2 / β -Bi 2 O 3 ) heterojunctions are developed in situ using FL-δ-Bi 2 O 3 as the starting material. It is noteworthy that the basic compositional form of the material was well maintained throughout the synthesis. Besides, due to the random reaction of iodide ions with the exposed surface of δ-Bi 2 O 3 , multiple heterogeneous regions are displayed on the basic lamellar units constituting the Bi 4 O 5 I 2 /β-Bi 2 O 3 nanoflowers. Theoretical and experimental results reveal that FL-Bi 4 O 5 I 2 /δ-Bi 2 O 3 possesses not only improved photogenerated carrier separation, enhanced light harvesting, but also considerable CO 2 adsorption. Importantly, FL-Bi 4 O 5 I 2 / β -Bi 2 O 3 achieves S-scheme CO 2 conversion due to its reasonable energy band structure, and with the CO generation rate of up to 31.74 μmol g −1 h −1 under simulated sunlight.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Luwei Peng,Wenshuang Lou,Lulu Li,Yang Zhang,Xi Luo,Nengneng Xu,Jinli Qiao
CO 2 , as one of the greenhouse gases, actually represents a cheap and abundant C1 fuel to produce fuels and chemical stocks. Herein, inspired by photocatalysis and electrocatalysis, we have successfully synthesized a series of copper and bismuth oxides with heterostructure by a first co-electrodeposition method and then by thermal treatment at different temperatures. The bimetallic oxide (Cu 2 O/β-Bi 2 O 3 ) at 300 °C with the main exposure of β-Bi 2 O 3 (2 0 1) planes shows the beautiful micro-flower morphology with numerous petals in thickness around 20 ∼ 40 nm. Therefore, the Cu 2 O/β-Bi 2 O 3 heterostructure with active edge sites can electrochemically convert CO 2 into formate with a promising Faradaic efficiency (96.3 %) and current density (40.4 mA cm −2 ) at − 0.97 V vs. RHE. Specifically, the current density of Cu 2 O/β-Bi 2 O 3 bimetallic catalyst can be largely enhanced to 48.5 mA cm −2 at − 0.92 V vs. RHE with the assistance of light compared to the 30.1 mA cm −2 without light. The production rate of formate with the assistance of light can also be increased to 705.1 μmol h −1 cm −2 , superior to that of 536.4 μmol h −1 cm −2 without light. Such an excellent photo-assisted electrochemical CO 2 reduction performance is due to the fast charge-transfer process between Cu 2 O and β-Bi 2 O 3 . This study may provide a new route to directly synthesize the photoactive electrocatalysts with more edge sites and heterojunction for promoting electrochemical CO 2 reduction performance with the assistance of light field.
研究领域:
材料科学
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环境科学
·
电化学
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产品关联
DOI
高影响因子
ANALYST
·
2024
·
IF 3.6
Binbin Chen,Lizhu Fan,Chunyu Li,Lu Xia,Kaiwen Wang,Jinshu Wang,Dawei Pang,Zhouhao Zhu,Peijie Ma
In this work, Au/Bi2O3 was synthesized by loading Au nanoparticles (NPs) onto β-Bi2O3 by a simple solution reduction method. β-Bi2O3 was synthesized by a precipitation-thermal decomposition procedure, which results in significantly improved SERS detection limits down to 10−9 M for methylene blue (MB) and 10−7 M for methyl orange (MO) as probe molecules, comparable to those reported for the best semiconductor SERS substrates. In particular, further deposition of Au NPs (5.20% wt%) onto β-Bi2O3 results in a two-order-of-magnitude enhancement in detection sensitivity, achieving a detection limit of 10−11 M for MB and 10−9 M for MO. Under ultraviolet/visible irradiation, the Au/Bi2O3 hybrids substrate exhibits superior self-cleaning ability due to its photocatalytic degradation ability which can be applied repeatedly to the detection of pollutants. The advanced composite substrate simultaneously achieved ultra-low mass loading of Au NPs, outstanding detection performance, good reproducibility, high stability and self-cleaning ability. The development strategy of low load noble metal coupled high performance semiconductor β-Bi2O3 to obtain nano-hybrid materials provides a method to balance SERS sensitivity, cost effectiveness and operational stability, and can be synthesized in large quantities, which is a key step towards commercialization and has good reliability prospects.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiehao Li,Meng Ning,Yi-lei Li,Rui-hong Liu,Haiyang Gao,Ying Liu,Yingjuan Hao,Hui-ying Mu,Fa-tang Li
The construction of heterojunction nanomaterials offers a viable solution to enhance degradation capabilities. In this work, in-situ 2D/2D β-Bi 2 O 3 /Bi 5 NO 3 O 7 extra-low van der Waals (VDW) heterojunctions with oxygen vacancies are prepared by a simple solution combustion method. The successful preparation of extra-low VDW heterojunctions are verified by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Density Functional Theory (DFT), etc. The carrier flow direction is determined by DRS, Mott-Schottky, Kelvin probe and femtosecond transient absorption spectra (fs-TAS) characterization. The rate of photocatalytic degradation of Rhodamine B under visible light by the 5.6 β-Bi 2 O 3 /Bi 5 NO 3 O 7 (5.6 BBNO) heterojunction is 1.59 times that of Bi 5 NO 3 O 7 and 3.28 times that of β-Bi 2 O 3 . This is attributed to the extra-low van der Waals heterojunction, which not only enhances the separation efficiency of photogenerated carriers but also lowers the valence band maximum of Bi 5 NO 3 O 7 . Furthermore, capture agent experiments and EPR tests confirm that holes (h + ) play a key role in photocatalytic degradation.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2013
·
IF 5.825
Xin Xiao,Ruiping Hu,Chao Liu,Chunlan Xing,Cheng Qian,Xiaoxi Zuo,Junmin Nan,Lishi Wang
A facile solvothermal–calcining route for the large-scale synthesis of uniform β-Bi 2 O 3 nanospheres has been demonstrated. The morphology, structure, and photoabsorption of β-Bi 2 O 3 were characterized, and the effects of the preparation conditions on the structural properties of products were analyzed. The results show that monodisperse bismuth nanospheres are formed through the solvothermal reaction where the d -fructose acting as the dominant reductant, and subsequently converted to β-Bi 2 O 3 nanospheres after the calcination in air. It is shown that the composition and structure of the products are greatly affected by the amount of d -fructose, the solvothermal and calcination temperature. The formation mechanism of β-Bi 2 O 3 nanospheres is assumed to undergo the “in situ reduction” of Bi(III)–ethylene glycol complex spheres which serve as self-sacrificing templates, followed by the “in situ oxidation” of bismuth nanospheres by oxygen during the calcination in air. The visible light-induced photocatalysis of the synthetic photocatalysts applied to the degradation of acetaminophen (APAP, a widely occurring human-derived pharmaceutical found in the environment) has been studied systematically. The photocatalytic reaction of APAP over the β-Bi 2 O 3 nanospheres follows pseudo first-order kinetics according to the Langmuir–Hinshelwood model, and exhibits a higher reaction rate constant, which is 2.5, 7, 8.1, and 79 times higher than that of commercial Bi 2 O 3 , synthetic α-Bi 2 O 3 , nitrogen doped TiO 2 (N-TiO 2 ), and Degussa P25, respectively. The superior photocatalytic activity is attributed to the narrower band gap energy (approximately 2.36 eV), nanostructure, good dispersion and high oxidation power of the β-Bi 2 O 3 nanospheres. Only one intermediate at m / z 110 can be detected by liquid chromatography/mass spectrometry (LC/MS) in the photodegradation process, while several low-molecular-weight organic acids were identified by ion chromatography (IC) analysis. By combining with the experimental determination of reactive oxygen species in the photocatalytic process and the theoretical calculation of frontier electron density of APAP, a simple, hole-predominated photodegradation pathway is proposed. In addition, the high mineralization efficiency indicates that the as-synthesized β-Bi 2 O 3 nanospheres photocatalyst can avoid secondary pollution during photocatalysis, which is important in practical applications.
研究领域:
材料科学
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环境催化
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纳米材料
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光催化
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环境污染治理
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DOI
高影响因子
危险品化学品经营许可证（带存储）