JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 29
·23187-23195
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IF 2.779
Yi Junhui,Li Minghao,Xie Runkun,Liao Xiaoying,You Jinfeng,Chen Beifang,Liu Qiqi,Huang Weili
CuBi 2 O 4 is widely used in photocatalytic degradation for pollutants in water due to its strong visible light response characteristics, excellent chemical stability, non-toxic, and low cost. Here, stone-shaped CuBi 2 O 4 was prepared with CuO and Bi 2 O 3 as raw materials by high temperature solid phase. The effect of calcined temperature and time on the product was discussed. This material was analyzed and discussed by XRD, SEM, XPS, and DRS, and the visible light activity of degradation for Orange II was explored. The results showed that the absorption edge of prepared CuBi 2 O 4 expands to the visible region, and the band gap was about 1.77 eV. The photocatalytic degradation rate of Orange II was 42.6% under the optimal conditions. After H 2 O 2 assisted, the degradation rate was more than 2 times, and repeated experiments verified that the prepared catalysts had high stability. Finally, a reasonable mechanism of H 2 O 2 assisted degradation enhancement is proposed. This work gives new ideas for the preparation of new and efficient catalytic materials.
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 PHYSICS AND CHEMISTRY OF SOLIDS
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2022
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IF 4.383
Yongfan Cao,Tufeng He,Meijia Li,Zhenzhu Cao,Yanfang Gao,Jinrong Liu,Guorong Li
Piezocatalysis is realized in hydrothermally-derived CuBi 2 O 4 nanorods for the first time. Through bi-harvesting of photo- and vibration energies, 98.1% Rhodamine B (RhB) can be degraded, which is significantly higher than ∼38.7% from single photocatalysis and ∼72.8% from single piezocatalysis. The enhanced catalytic activity is attributed to the intensified separation of electron-hole under the piezoelectric potential. Results show that CuBi 2 O 4 is promising catalyst to decompose the organic pollutant in nature water.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2025
·
IF 6.7
Hanlu Zeng,Yunlan Xu,Dengjie Zhong,Qingmei Qiao,Yuqin Yang,Jitai Li
Photocatalytic fuel cell (PFC) is a new device that can efficiently degrade organic pollutants and recover their energy. This paper used solvothermal method to prepare a flower-like copper bismuth oxide/bismuth oxy bromide/Chitosan/Titanium (CuBi 2 O 4 /BiOBr/CS/Ti) photoanode. It was then assembled with a Cu cathode to produce a PFC for reducing rhodamine B (RhB) and generating power. Different analytical methods were utilized to analyze the photoanode's chemical composition, crystal structure, and electrochemical properties. CuBi 2 O 4 /BiOBr/CS/Ti had higher photocatalytic activity than single and binary composite photoanodes, which had good stability. The RhB degradation rate, maximum power density ( P max ), maximum photocurrent density ( J sc ) and the fill factor ( FF ) of the PFC were 90.98 %, 30.80 μW·cm −2 , 0.283 mA·cm −2 and 0.22, respectively. The results of transient photocurrent (i-t), electrochemical impedance spectra (EIS) and Mott-Schottky (M-S) spectra, and free-radical capture experiments indicated that the enhancement of the photocatalytic performance of the CuBi 2 O 4 /BiOBr/CS/Ti photoanode was due to the formation of the Z -scheme heterojunction between CuBi 2 O 4 and BiOBr and the electron mobility of CS. This achieved the rapid separation and transfer of electron (e − )-hole (h + ) pairs and maintained the strong oxidation of holes in the valence band (VB) of BiOBr and the strong reduction of electrons in the conduction band (CB) of CuBi 2 O 4 . This research introduces a novel approach to design and establish excellent performance photoanode of PFC system.
研究领域:
环境科学
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材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
·
IF 3.9
Li Jia,Shi Quanquan,Ha Lin,Sun Yanxin,Shi Huiming
Rational development of innovative photocatalysts with efficient interfacial separation and stronger oxidation–reduction ability of photo-generated carrier is critical for environmental antibiotic purification. In this work, a novel dual Z-scheme heterojunction nanocomposites were fabricated based on the in-situ growth of CuBi 2 O 4 nanoparticles onto the surface of TiO 2 nanorods and Bi 2 O 2 CO 3 nanosheets via a facile one-step hydrothermal method. Ternary TiO 2 /CuBi 2 O 4 /Bi 2 O 2 CO 3 (TCB) composites showed enhanced photocatalytic removal of tetracycline (TC), which is greater than pure Bi 2 O 2 CO 3 , CuBi 2 O 4 , TiO 2 and binary composites. The TCB-20 composite exhibited the best photo-degradation efficiency of TC (82% at 60 min) and maintained a higher stability after four consecutive cycles. Additionally, a dual Z-scheme photocatalytic mechanism with highly efficient and fast electron transfer was proposed, which prominently improves the photocatalytic performance. This work reports an integrated structure of a dual Z-scheme heterojunction that plays an important role in the degradation of tetracycline. Graphical abstract
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2024
·
IF 3.8
Yuqing Shi,Yuhang Li,Yumeng Xue
Photocatalytic technique is one of the clean and promising routes for wastewater purification. In this work, a different CuBi 2 O 4 /Bi 4 O 5 Br 2 Z-scheme heterojunction were successfully prepared via an in-situ mechanical agitation method. The 10 % CuBi 2 O 4 /Bi 4 O 5 Br 2 (10 % CBO/BOB) heterojunction showed the highest photocatalytic degradation activity for catechin, and ∼99.8 % catechin was degrade within 40 min visible light stimulation, which is (0.0757/min) about 6.2-folds and 8.8-folds to that of Bi 4 O 5 Br 2 (0.0122/min) and CuBi 2 O 4 (0.0086/min), The pH = 7 is the optimal reaction condition for catechin degradation. Besides, The photocatalytic degradation capacity of the 10 % CBO/BOB heterojunction displayed the positive and negative relationship to the dosage of catalyst and initial concentration of catechin, respectively. The enhanced photocatalytic activity of CuBi 2 O 4 /Bi 4 O 5 Br 2 Z-scheme heterojunction can be ascribed to the improvement of the charge separation and light utilization rate. The results of ESR and trapping experiments revealed that the ·O 2 − , h + and ·OH are the primarily reactive substances for catechin degradation. Additionally, the transfer pathway of the photogenerated charges in the CuBi 2 O 4 /Bi 4 O 5 Br 2 Z-scheme heterojunction as revealed by the ESR, Mott-Schottky curve and UV–Vis diffuse reflectance absorption spectroscopy. This work provide a new idea for designing and preparing the novel Bi 4 O 5 Br 2 -based photocatalyst for TCM wastewater purification.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Xiao Wang,Wenjing Liu,Chenlin Wang,Shouwei Zhang,Meng Ding,Xijin Xu
Oxygen vacancy construction has been regarded as an effective method to enhance the sensing performance of the gas sensors. Herein, in this work, two CuBi 2 O 4 composites with nanoflowers (CBOF) and nanospheres (CBOS) structures were synthesized with similar BET specific surface area, pore size distributions and exposed facets. However, a higher bulk oxygen vacancy concentration was found in the CBOS composites, bringing a higher carrier concentration and lower baseline resistance. As a consequence, the CBOS sensors exhibited better formaldehyde gas sensing performance (10.9–60 ppm gas) than that of the CBOF sensors (5.8). After treated in NaBH 4 solutions, both composites exhibited enhanced surface adsorbed oxygen species and formaldehyde sensing response, owning to the generation of more surface oxygen vacancies to facilitate the surface adsorptions and redox reactions. After that, the Pt nanoparticles were decorated on the CBOS surface with a reduced method. The formaldehyde sensing response and selectivity were further enhanced due to the surface catalytic activity of the Pt nanoparticles. This work proves that CuBi 2 O 4 composites can be an ideal sensing platform through oxygen vacancy construction and noble metal sensitization, and will facilitate the development of p-type ternary sensing materials.
研究领域:
材料科学
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化学工程
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传感器技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Huixuan Zhang,Li-chao Nengzi,Xiaoling Li,Zhongjuan Wang,Bo Li,Lichen Liu,Xiuwen Cheng
In this study, CuBi 2 O 4 /MnO 2 composite was successfully prepared by a two-step hydrothermal method and served as a low-cost and non-toxic catalyst for photo-Fenton reaction. Meanwhile, several refractory pollutants including ceftiofur (CEF), tetracycline (TC) and lomefloxacin (LOM) could be efficiently eliminated within 40 min. Particularly, the influence of experimental parameters towards CEF degradation were systematically studied in detailed. 93.6% of CEF was decomposed over 40 min with 0.4 g·L −1 PMS and 0.3 g·L −1 CuBi 2 O 4 /MnO 2 at pH 11. After this, active species scavenging experiments were conducted and the results exhibited that sulfate radicals, hydroxyl radicals, holes and superoxide radicals participated in the degradation of CEF. Besides, CuBi 2 O 4 /MnO 2 composite possessed high stability and reusability based on continuous cycle experiments. Moreover, based on the analysis of HPLC/MS, three possible degradation pathways of CEF were put forward and the degradation mechanism of CEF was elucidated.
研究领域:
环境科学
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催化材料
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污染控制
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Yapeng Li,Qinghong Pan,Huiting Shi,Youyou Du,Ailing Yang,Da-Peng Yang
The quantitative determination of cholesterol in foods, drugs, and biological fluids holds significant importance due to its potential health risks. Herein, a self-powered photoelectrochemical (PEC) sensor was developed for cholesterol detection. The photoelectrochemical system was constructed by modifying fluorine-doped tin oxide (FTO) electrodes with ZnO/C (serving as the photoanode) and iron-modified CuBi 2 O 4 (denoted as CBFO, functioning as the photocathode) through a controlled deposition process. To enhance detection selectivity, molecularly imprinted polymers (MIPs) were electrodeposited on the photocathode surface. The optimized sensor exhibited a linear detection range of 1–1000 nmol L −1 and a detection limit of 0.26 nmol L −1 (S/N = 3). Practical application of the sensor for cholesterol detection in milk samples demonstrated satisfactory recovery rates (98.6 %–107 %) with relative standard deviations (RSD) ranging from 2.38 % to 4.25 %. These results underscore the potential of this self-powered PEC sensor as a robust platform for rapid and accurate cholesterol determination in food products, pharmaceuticals, and environmental samples.
研究领域:
分析化学
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生物医学工程
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Burenbayaer Borjigin,Lan Ding,Chenghong Liu,Huiqin Li,Xiaojing Wang
The exploration of highly efficient methods for degrading VOCs, with concurrent low energy consumption and lasting reusability, holds significant appeal. In this regard, an S-type CuBi 2 O 4 /CeO 2-x heterojunction with the robust interfacial interactions is presented as an active photocatalyst for the efficient decomposition of gaseous toluene under full-spectrum irradiation. The optimal sample CC15 effectively degrades gaseous toluene at a high concentration of 1800 ppm within 2 h, achieving a notable CO 2 yield of 87.05 %, and a TOC (total organic carbon) removal rate of 89.33 %. Furthermore, CuBi 2 O 4 /CeO 2-x exhibits exceptional stability, maintaining its 100 % degradation capability over 32 cycles for nearly 64 h. Comparative characterization reveals that the superior performance derives from an abundance of oxygen vacancies and effective pre-adsorption capabilities, which facilitate rapid adsorption of VOCs on the catalyst surface, thereby increasing the likelihood of degradation reactions. Additionally, the formation of an S-type heterojunction, valence pairing between Bi 3+ and Ce 3+/4+ ions, and strong interfacial interactions serve as the primary pathways for the efficient separation of photogenerated carriers, contributing to the high CO 2 production rate and prolonged cycle stability. The present investigation underscores the significant potential of vacancy-rich S-type heterojunctions and interfacial interactions between composite components, offering excellent activity and long-term availability for VOCs removal.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Guorui Liu,Guorui Ma,Haiqiang Mu,Jing Li,Feng Li,Min Zhu,Jin Zhang
Significant carrier recombination has severely limited the development of the most potential photoelectrocatalytic CO 2 reduction reaction (PEC-CO 2 RR). Herein, coral-like CuBi 2 O 4 -Bi 2 O 3 photocathodes are prepared using the strategy of the construction of heterojunction to improve the efficiency of carrier separation. As expected, its faradic efficiency of CO (FE CO ) at the lower potential (0.1 V vs. RHE) is 86.03 %, which is about 1.49 times higher than that of the original CuBi 2 O 4 film. The increased catalytic activity of CuBi 2 O 4 -Bi 2 O 3 can be attributed to the high surface area of the distinctive coral-like structure of Bi 2 O 3 , which enhances light absorption efficiency. Additionally, the higher degree of band bending in CuBi 2 O 4 -Bi 2 O 3 and the built-in electric field can speed up the transport rate of electrons, slow down the recombination of photogenerated electrons with holes and extend the lifetime of photogenerated electrons, allowing electrons to continuously participate in the reaction. This study proposes a novel strategy to optimize the efficiency of photoelectrocatalytic CO 2 reduction by CuBi 2 O 4 -based photocathodes.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 8
·1514
·
IF 4.324
Fang Cai,Ting Zhang,Qiong Liu,Pengran Guo,Yongqian Lei,Yi Wang,Fuxian Wang
Tetragonal CuBi2O4/amorphous BiFeO3(T-CBO/A-BFO) composites are prepared via a one-step solvothermal method at mild conditions. The T-CBO/A-BFO composites show expanded visible light absorption, suppressed charge recombination, and consequently improved photocatalytic activity than T-CBO or A-BFO alone. The T-CBO/A-BFO with an optimal T-CBO to A-BFO ratio of 1:1 demonstrates the lowest photoluminescence signal and highest photocatalytic activity. It shows a removal rate of 78.3% for the photodegradation of methylene orange under visible light irradiation for 1 h. XPS test after the cycle test revealed the reduction of Bi3+during the photocatalytic reaction. Moreover, the as prepared T-CBO/A-BFO show fundamentally higher photocatalytic activity than their calcinated counterparts. The one-step synthesis is completed within 30 min and does not require post annealing process, which may be easily applied for the fast and cost-effective preparation of photoactive metal oxide heterojunctions.Keywords:tetragonal CuBi2O4;amorphous BiFeO3;visible light absorption;charge carrier recombination;photocatalytic property
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Chunyan Ma,De-Kun Ma,Wenyuan Yu,Wei Chen,Shaoming Huang
Photoelectrochemical (PEC) water splitting that can mimic natural photosynthesis to directly harvest and convert solar energy into clean and sustainable hydrogen energy, has been known as a promising avenue for addressing environmental pollution and energy crisis. Spinel-type CuBi 2 O 4 semiconductor as a promising photocathode material for solar water reduction has attracted much attention because of its many unique advantages. However, PEC activity of pristine CuBi 2 O 4 is far from satisfying because of its poor charge carrier transport and transfer efficiency. Herein we report that Ag + ions and N-doped graphene quantum dots (NGQDs) co-modified CuBi 2 O 4 submicron rods (NGQDs/Ag-CBO SMRs) photocathode can show enhanced PEC activity. Our work demonstrated that one-dimensional structure, Ag + ions doping, and NGQDs loading benefited the separation and transfer of photogenerated carriers and improved light harvesting ability, which were collectively contributed to enhanced PEC activity of NGQDs/Ag-CBO SMRs photocathode. As a result, the photocurrent density achieved on NGQDs/Ag-CBO SMRs photocathode under AM1.5G simulated sunlight at 0.3 V vs. RHE was 8.8, 2.3, 1.8, and 5.9-times larger than those obtained on CBO SMRs, Ag-CBO SMRs, NGQDs/CBO SMRs, and NGQDs/Ag-CBO microspheres (MSs) ones, respectively. The present study provides a new strategy for designing low-cost and highly efficient photocathodes.
研究领域:
材料科学
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能源科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）