DIAMOND AND RELATED MATERIALS
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2024
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IF 4.3
Yueyi Li,Yuehui Liu,Xuguang Liu,Xia Li
In this study, rGO/Bi 2 O 2 CO 3 /BiOCl composite photocatalysts were prepared using a one-step solvothermal method . The formation and morphology of these photocatalysts were characterized through XRD , Raman, XPS , SEM , TEM, and other techniques. The efficiency of the composite photocatalysts was assessed by decreasing RhB under visible light . Among them, the photocatalytic activity of 4 wt% rGO/Bi 2 O 2 CO 3 /BiOCl was discovered to be the best, with a degradation rate as high as 96 % within 60 min. This is because the inclusion of rGO not only increased the specific surface area of the ternary materials, but also acted as a carrier for electrons transfer . Besides, the heterojunction structure constituted between Bi 2 O 2 CO 3 and BiOCl also opens up a new pathway for carrier separation. Finally, we explored the degradation mechanism of rGO/Bi 2 O 2 CO 3 /BiOCl ternary materials in detail. This study holds an important reference for the synthesis of bismuth-based composite photocatalysts and has potential applications in wastewater treatment .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Pingping Teng,Jiabao Zhu,Zhiang Li,Kang Li,Nigel Copner,Shuai Gao,Enming Zhao,Xiaoliang Zhu,Zhihai Liu,Fengjun Tian,Yu Zhang
In this paper, one-dimensional PAN-Bi 2 O 2 CO 3 –BiOI photocatalytic nanofibers were prepared using flexible PAN nanofibers as carriers. Bi 2 O 2 CO 3 was first grown on the surface of PAN nanofibers, and then BiOI was loaded on Bi 2 O 2 CO 3 by ion exchange method. The characterization results showed that PAN-Bi 2 O 2 CO 3 –BiOI nanofibers have a diameter of about 210 nm and regular fiber morphology. The results of UV–Vis diffuse reflectance spectroscopy, XRD and XPS showed that Bi 2 O 2 CO 3 –BiOI composed of granular semiconductor nano heterostructures with high specific surface area were uniformly loaded on the surface of PAN fiber . The photocatalytic degradation experiment of the material showed high visible light photocatalytic activity . The preparation of Bi 2 O 2 CO 3 –BiOI heterojunction improved the photoelectron hole separation efficiency of BiOI under visible light. PAN-Bi 2 O 2 CO 3 –BiOI fibers showed high photocatalytic degradation efficiency for rhodamine B. The degradation efficiency was more than 95% within 120 min irradiation. Free radical trapping experiments showed photocatalysts mainly produced O 2 − ,·OH and h + , which played a major role in photocatalysis .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Bihui Tan,Yu Fang,Qianlin Chen,Xianquan Ao,Yang Cao
Bi 2 O 2 CO 3 (BOC) was successfully loaded on a highly conductive Ti 3 C 2 surface by the hydrothermal method, forming a unique BOC/Ti 3 C 2 heterostructure. The use of advanced characterization methods reveals the composition, morphology and photoelectric properties of the material. The results show that the interface formed by close contact between BOC and Ti 3 C 2 provides an effective channel for charge transfer between the two. Importantly, the photocatalytic degradation efficiency of BOC/Ti 3 C 2 for tetracycline (TC) is ~80%, which is significantly higher than the degradation efficiency of pure BOC and pure Ti 3 C 2 for TC. In addition, BOC/Ti 3 C 2 still has high catalytic activity in the degradation of complex mixed antibiotics. This is because BOC and Ti 3 C 2 have large specific surface areas, high light absorption capacity and efficient carrier separation after recombination. At the same time, the detected superoxide radicals ( O 2− ) and holes (h + ) are the main active substances. The degradation pathway and catalytic mechanism of the photocatalytic degradation of TC by BOC/Ti 3 C 2 are further explained. This research designed and developed a BOC/Ti 3 C 2 composite material for the photocatalytic degradation of tetracycline and mixed antibiotic wastewater, providing experimental methods and ideas for actual wastewater treatment.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Catalysts
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2022
·Vol. 12
·期 11
·1295
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IF 4.501
Qingyun He,Xingqiang Liu,Feng Li,Fang Li,Leiming Tao,Changlin Yu
In order to solve the problem of environmental health hazards caused by phthalate esters, a series of pure Bi2O2CO3and light (La, Ce, Pr, Nd, Sm and Eu) and heavy (Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) rare earth-doped Bi2O2CO3samples were prepared by hydrothermal method. The crystalline phase composition and physical structure of the samples calcined at 300 °C were studied, and we found that the rare earth ion doping promoted the transformation of Bi2O2CO3to β-Bi2O3crystalline phase, thus obtaining a mixed crystal phase photocatalyst constituted by rare earth-ion-doped Bi2O2CO3/β-Bi2O3. The Bi2O3/Bi2O2CO3heterostructure had a lower band gap and more efficient charge transfer. The fabricated samples were applied to the photocatalytic degradation of dimethyl phthalate (DMP) under a 300 W tungsten lamp, and it was found that the rare earth ion doping enhanced the photocatalytic degradation activity of DMP, in which the heavy rare earth of Er-doped sample reached 78% degradation for DMP at 150 min of light illumination. In addition, the doping of rare earths resulted in a larger specific surface area and a stronger absorption of visible light. At the same time, the formation of Bi2O2CO3/β-Bi2O3heterogeneous junction enhanced the separation efficiency of photogenerated electrons and holes.Keywords:rare earth;doping;Bi2O2CO3;photocatalysis;dimethyl phthalate
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
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2024
·Vol. 38
·期 9
·e7614
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IF 3.7
Qiuyun Zhang,Feiran Xie,Jialu Wang,Tianqing Wang,Jiao Lei,Weihua Li,Jingsong Cheng,Yutao Zhang
For nearly a century, the excessive discharge of organic contaminants has gradually polluted water and endangered people's health, and photocatalysis has been prominently employed to remove persistent recalcitrant organic. Here, MIL-101(Cr) was firstly employed to introduce thin-layered Bi 2 O 2 CO 3 for the formation of Bi 2 O 2 CO 3 /MIL-101(Cr) nanosheet composite, by a simple and low-temperature in-situ growth approach. The phase, morphology, optical, and surface characteristics of the fabricated composite were characterized through XRD, FTIR, SEM-EDS, N 2 adsorption–desorption, UV–Vis DRS, PL, TG, and XPS techniques, and the ability in the photocatalytic breakdown of rhodamine B (RhB) molecule under visible light was also studied. The results of characterization analysis and optical analysis exhibited that Bi 2 O 2 CO 3 /MIL-101(Cr) has large pore size, good visible light response-ability, and the heterojunction created by intercalating Bi 2 O 2 CO 3 on MIL-101(Cr). Photocatalytic studies revealed that Bi 2 O 2 CO 3 /MIL-101(Cr) had superior RhB degradation activity than pure MIL-101(Cr) and Bi 2 O 2 CO 3 , which achieved 97.1% with visible light irradiation for 20 mg/l RhB. Meanwhile, the Bi 2 O 2 CO 3 /MIL-101(Cr) composite displayed good recyclability after three cycles as revealed by XRD and FTIR analysis proving their excellent stability. This study provides feasible insight into developing novel and efficient MIL-101-based heterojunction catalysts for environmental remediation in the future.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Advanced Science
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2024
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IF 14.3
Zichen Zheng,Kewei Liu,Yiwen Zhou,Kaichun Xu,Yifan Luo,Jiabao Ding,Carla Bittencourt,Marc Debliquy,Chao Zhang
La-decorated Bi 2 O 2 CO 3 (BCO-La) microspheres are synthesized using a facile wet chemical strategy for sensing low-concentration nonanal (C 9 H 18 O) at room temperature. These BCO-La gas sensors are applied to evaluate agricultural product quality, specifically for cooked rice. The sensitivity of the BCO-6La sensor significantly surpassed that of the pure BCO sensor, achieving a response value of 174.6 when detecting 30 ppm nonanal gas. Notably, the BCO-6La sensor demonstrated a faster response time (36 s) when exposed to 18 ppm of nonanal. Additionally, the selectivity toward nonanal gas detection is higher (approximately 4–24 times) compared to interfering gases (1-octanol, geranyl acetone, linalool, hexanal, 2-pentyfuran, and 1-octen-3-ol) during cooked rice quality detection. The gas sensing mechanism and the factors contributing to the enhanced sensing performance of the BCO-La microspheres are demonstrated through in situ FT-IR spectra and DFT analysis while the realistic detection scenario is carried out. In a broader context, the reported sensors here represent a novel platform for the detection and monitoring of gases released by agricultural products during storage.
研究领域:
材料科学
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传感器技术
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农业科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
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IF 4.175
Shu Wu,Jingjing Guo,Yan Wang
Constructing heterojunction to achieve efficient charge separation and transfer is a significant way to enhance photocatalytic activity. Herein, a novel ternary Bi 2 O 2 CO 3 –Bi 2 O 2 (OH)NO 3 /g-C 3 N 4 (labeled as BOC-BON/CN) heterojunction photocatalyst was successfully synthesized by ion exchange reaction under hydrothermal conditions. The products were characterized by various analytical methods, including X-ray diffraction (XRD), Fourier transform-infrared spectrometer (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray spectrometer (SEM), UV–vis reflectance spectra (UV–vis DRS), photoluminescence (PL), photocurrent response and electrochemical impedance spectroscopy (EIS). Heterojunction formation mechanism and photocatalytic degradation mechanism were discussed in detail. The prepared BOC-BON/CN heterojunction exhibited excellent Rhodamine B (RhB) photodegradation rate of 0.0476 min −1 under visible light, which was 3.55 times of the pristine g-C 3 N 4 (0.0134 min −1 ). The significant increase in photodegradation rate was attributable to the heterojunction structure, which promotes the separation of photogenerated charges. Bi 2 O 2 (OH)NO 3 played an essential role as electron accelerator in the charge transfer process. The internal electric field of Bi 2 O 2 (OH)NO 3 accelerates the directed transfer of electron from g-C 3 N 4 to Bi 2 O 2 CO 3 . This work extends the study of g–C 3 N 4 –based photocatalytic systems and demonstrates Bi 2 O 2 (OH)NO 3 as a promising cocatalyst.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Wei Gao,Huichun Kang,Ming Zhong,Lijuan Han,Bitao Su,Ziqiang Lei
The development of novel photocatalysts for the removal of pollutants in wastewater under visible light has garnered considerable attention. In this study, a strategy was adopted to incorporate Bi 2 O 2 CO 3 into acrylic acid-acrylamide copolymerized hydrogels to significantly enhance the visible photocatalytic performance of the composites (P(AA- co -AAm)-BOC). The as-prepared photocatalyst exhibits an 85.5 % removal rate of a 30 mg/L methyl blue solution after 80 min of visible light irradiation. After undergoing four cycle tests, the photocatalytic performance remains stable, with the methyl blue removal rate maintained above 80 %. Impressively, the first-order kinetic constant of the hydrogel is 7 times higher than that of pure Bi 2 O 2 CO 3 . Furthermore, experimental and various characterization results have demonstrated that the hydrogel not only enhances the adsorption performance but also narrows the bandgap, significantly inhibiting the complexation of photogenerated carriers and thereby effectively improving the photocatalytic performance of the composites. This work offers new perspectives for constructing efficient hydrogel composites to enhance photocatalytic activity under visible light irradiation.
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DOI
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Xin Hu,Huiping Zhao,Ying Liang,Fengxi Chen,Jun Li,Rong Chen
N-doped carbon quantum dots (NCQDs) decorated Bi 2 O 2 CO 3 heterojunction nanosheets have been successfully constructed by a facile hydrothermal method. The obtained NCQDs/Bi 2 O 2 CO 3 heterojunction exhibits a wide-spectrum absorption ability and remarkably enhanced photocatalytic activities for ciprofloxacin photodegradation from ultraviolet to near-infrared region. The critical roles of NCQDs and two different charge separation and transfer processes of NCQDs/Bi 2 O 2 CO 3 heterojunction under different light irradiations have been elucidated. Upon UV light irradiation, NCQDs act as electron reservoirs and a Z-scheme charge transfer process between Bi 2 O 2 CO 3 and NCQDs promotes electrons transfer and •O 2 − reactive species generation. Under visible and NIR light irradiation, NCQDs act as photosensitizer (hole reservoirs) to harvest solar light and a type-II heterojunction leads to an efficient charge carrier separation and thus high catalytic ability. The mechanisms and pathways of ciprofloxacin degradation driven by different lights are discussed accordingly. This work provides a versatile pathway to well design an efficient wide-spectrum response photocatalyst.
研究领域:
材料科学
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环境科学
·
光化学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Ao Sun,Yingqing Zhan,Ximin Chen,Hongshan Jia,Fei Zhu,Chunxia Zhao,Yinlong Li,Hui He,Yuanpeng Wu,Tian He,Tingting Hu
Membrane separation technique offers unique advantages for treating the emulsified oily wastewater with the oil droplet diameter less than 20 µm. However, the complicated membrane fouling originating from oils and soluble matters pose the huge challenges to membrane separation technique, which has stimulated the development of advanced membrane materials. Herein, we reported the photocatalytic and super-wetting poly (arylene ether nitrile) (PEN) fibrous composite membrane with high permeability and enhanced anti-fouling ability. The nitrogen-doped Bi 2 O 2 CO 3 (N-Bi 2 O 2 CO 3 ) was prepared by low-temperature chemical modification method and modified by dopamine (DA)-polyethyleneimine (PEI), which was further self-assembled on porous PEN support backbone. The hydrophilicity provided by the cross-linking reaction between PDA and PEI and micro-/nano- rough surface constructed by the flower-like N-Bi 2 O 2 CO 3 contributed to the super wetting properties (WCA=0°, UOCA>150°), which imparted the membrane with ultra-low oil adhesion. In particular, the arrangement of flower-like N-Bi 2 O 2 CO 3 effectively regulated the water channel of membrane, further increasing the permeate flux. Therefore, the fibrous composite membranes showed superior separation flux (632.79–762.81 L·m −2 ·h −1 ) and separation efficiency (>99.16%) for various oil-in-water emulsions, even under harsh conditions (90 ℃ and 2 M NaCl solution). More importantly, the N-Bi 2 O 2 CO 3 rendered the membrane excellent degradation rates for various dyes (MO: 95.53%, MeB : 96.40%, CV: 96.45%, CR: 87.14%), achieving favorable photocatalytic self-cleaning ability. This work opens an alternative strategy to fabricate fibrous composite membrane with synergistically enhanced anti-fouling for the treating complicated emulsified oily wastewater in petrochemical industry .
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2021
·Vol. 132
·期 1
·581-597
·
IF 2.081
Zhao Qian,Lu Li,Wang Bin,Jiang Tingshun
The BiOI/Bi 2 O 2 CO 3 p–n junctions were constructed by anion exchange method with Bi 2 O 2 CO 3 in situ growth on BiOI. Then, the surfaces of BiOI/Bi 2 O 2 CO 3 samples were modified by negative charge with (3-aminopropyl) triethoxysilane (APTES) in an ethanol solution. Finally, the ami-BiOI/Bi 2 O 2 CO 3 /graphene (RGO) ternary composites were fabricates by the simple hydrothermal reaction. The obtained photocatalysts were well characterized with the various characterization techniques to study their morphological, physical, optical, and photocurrent properties, and have been evaluated by investigating the degradation of Rhodamine B and tetracycline under visible irradiation. Compared with single BiOI, the BiOI/Bi 2 O 2 CO 3 photocatalysts displays higher photocatalytic activity, due to the formation of the electric fields between p–n heterojunction to promote the migration of photogenerated carriers. Moreover, the ami-BiOI/Bi 2 O 2 CO 3 /RGO composites with the best photocatalytic activities can be attributed to that the positively charged ami-BiOI/Bi 2 O 2 CO 3 were coupled with the negatively charged graphite oxide (GO) by electrostatically attraction to form the effectively interfacial contacts, causing the photocatalytic reaction sites increased, the range of light response expanded, the separation of photogenerated charge further improved. This work provides a feasible strategy for the construction of high efficiency semiconductor and RGO nanocomposite photocatalyst.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Weiming Xiang,Qiuyi Ji,Chenmin Xu,Yang Guo,Yazi Liu,Dunyu Sun,Wenwu Zhou,Zhe Xu,Chengdu Qi,Shaogui Yang,Shiyin Li,Cheng Sun,Huan He
A novel Co 3 O 4 /g-C 3 N 4 /Bi 2 O 2 CO 3 (BCCN) photocatalyst with p-n/n-n heterojunction was synthesized through a solvent-thermal method. The degradation efficiency of 20 mg/L iohexol reached 94 % in 60 min ( k app =0.0417 min −1 ) in BCCN/light/PS system, which was 2.8 and 6.5 times higher than systems of BCCN/light ( k app =0.0150 min −1 ) and BCCN/PS ( k app =0.0064 min −1 ). The g-C 3 N 4 addition lowered conduction band of the prepared material to produce superoxide radicals, activate persulfate and further prevent the recombination of photoelectrons and holes. Superoxide radicals and singlet oxygens were dominant radicals for iohexol degradation. Besides, persulfate could act as electron acceptor to enhance efficiency of electron transfer. The interaction between sulfate, superoxide and hydroxyl radicals improved singlet oxygens production. Furthermore, theoretical calculation and liquid chromatography mass spectrometry were performed to analyze degradation pathway of iohexol in the system. Ultimately, the BCCN/light/PS system can provide a new method to degrade organic pollutants in aquatic environments.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）