PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Xueying Wang,Xinyu Wang,Hefan Zhang,Jiqiao Zhang,Zhida Li,Xin Wang,Jianming Xu,Delu Cao,Jintao Li,Changyu Lu
The photothermal effect generated under illumination can increase the surface temperature of the catalyst, and enhance the migration rate of the photogenerated carrier and the activity of the catalytic reaction , which is an effective way to promote photocatalytic degradation of pollutants. In this study, a Z-scheme BiVO 4 /CuBi 2 O 4 (BVO-CBO) heterojunction with 0D/1D structure was prepared by hydrothermal method . Compared with pure BVO and CBO, the temperature of the Z-scheme BVO-CBO heterojunction can reach 90.1°C after 180 S illumination, and the temperature of the BVO-CBO+TC solution system can rise to 39.5°C after 10 min, which has higher heating rate and photocatalytic performance than the monomer catalyst. The experimental results showed that the photogenerated electron transfer pathway combined with the photothermal effect effectively promoted the separation of photogenerated carriers and maintained a strong redox potential , so that the removal rate of tetracycline (TC) by BVO-CBO reached 85.0 % within 90 minutes, which was significantly higher than that of pure BVO (39 %) and CBO (33 %). In addition, the toxicity of intermediate products gradually decreased during TC degradation. In addition, the effects of reaction temperature, pH, concentration of TC, common aquatic substrates and simulated natural water on TC removal were also studied. The combination of its structural advantages, redox capabilities, and photothermal effect provided a promising approach to the treatment of antibiotic-contaminated water.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Nano Research
·
2021
·Vol. 14
·期 10
·3439-3445
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IF 8.897
Li Zixin,Xu Quanlong,Gou Faliang,He Bing,Chen Wei,Zheng Weiwei,Jiang Xu,Chen Kai,Qi Chenze,Ma Dekun
Photoelectrochemical oxygen reduction reaction (ORR) toward H 2 O 2 is highly desirable because only sunlight, O 2 and water are required in the process. However, the corresponding studies are still at its infancy because of the lack of suitable photocathodes, especially inorganic semiconductor photocathodes. In this work, we report CuBi 2 O 4 /CuO (CBO/CuO) heterojunction submicrocrystalline film photocathodes with efficient ORR activity for H 2 O 2 production. The heterojunction film photocathodes were prepared through thermal evaporation of Cu and Bi metals under vacuum and subsequent annealing treatment. Furthermore, the doping of Gd 3+ ions into CBO/CuO could significantly enhance the yield of H 2 O 2 . As a result, the concentration of H 2 O 2 could reach 1.3 mM within 30 min, which is 6 times higher than that obtained on the pristine CBO/CuO photocathode. The theoretical calculations suggested that the introduction of Gd could adjust the electronic structure of CBO surface and promote 2e ORR pathway for selective production of H 2 O 2 . Our work not only provides a new strategy for designing highly efficient photocathode for H 2 O 2 production but also will evoke more interest in photoelectrocatalytic ORR through inorganic semiconductor photocathode.
研究领域:
材料科学
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能源科学
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催化化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xueying Wang,Rongyu Zhang,Jun Luo,Hefan Zhang,Qiaozhi Yan,Jianwei Zhao,Zhao Liang,Weilong Shi,Changyu Lu
Through the interface regulation of surfactant, using the hydrothermal method to deposit 0D ZnSnO 3 on the surface of 3D CuBi 2 O 4 , the S-scheme ZnSnO 3 -CuBi 2 O 4 (ZSCB) heterojunction photocatalyst was synthesized, which exhibits outstanding redox capabilities. The strong light absorption performance of CBO in the visible range promotes its excellent photothermal conversion ability under visible light. Under visible light irradiation, its surface temperature can be increased from 26.2℃ to 98.5℃ within 9 minutes. Images at 808 nm near-infrared radiation show that the S-scheme ZSCB heterojunction can convert 34.16 % of light energy into heat energy in aqueous solution. Due to the S-scheme charge transport mechanism and photothermal effect of ZSCB, the heterojunction had excellent photogenerated carrier separation efficiency and high redox capacity, which can degrade 85.4 % of TC within 90 minutes, and the degradation rate was 3.1 times that of monomer CBO, also excellent TC degradation performance in simulated natural water and different ionic. The Fukui index and the change of mass charge ratio of TC during the degradation process, predicting the attack site of TC at the atomic level and clarifying that the S-scheme ZSCB heterojunction was controlled by electrophilicity, nucleophile and free radical during the photothermal photocatalytic degradation of TC. The ecological structural activity relationship model and mung bean culture experiment revealed the low ecological risk of TC degradation from theory to practice. This study provides a novel approach to the degradation of emerging pollutants and the environmental toxicology research associated with S-scheme heterojunctions.
研究领域:
环境科学
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材料科学
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光催化
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DOI
高影响因子
Journal of Water Process Engineering
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2023
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IF 7
Yaru Liu,Wenjing Yang,Yi Li,Shuang Wang,Sihui Zhan
Ciprofloxacin (CIP) has been widely detected in aquatic ecosystems due to antibiotics abuse and its refractory, which seriously affected public health and ecological safety. Herein, we devised a photo-electro-Fenton-like (PEF-like) system for efficient removal of CIP. CuBi 2 O 4 /Bi 2 MoO 6 (CBMO) p-n heterojunction composites were successfully fabricated through hydrothermal and solvothermal methods. Significantly, CBMO composite catalysts were not only able to generate ·OH by the Cu + activation of H 2 O 2 during electro-Fenton process, the following synergistic effects in the photo-Fenton process simultaneously promoted the production of more ·OH. The internal electric field (IEF) in the p-n heterojunction was conducive to the directional transfer of photogenerated electrons, thus promoting the spatial separation of photogenerated carriers. Moreover, photogenerated electrons could directly or indirectly activate H 2 O 2 to yield more abundant ·OH, thus improving photoelectric catalytic activity . Consequently, the degradation efficiency of CIP during PEF-like system was 97.4% in 90 min and the mineralization efficiency finally reached 78.5% in 180 min. The prepared CuBi 2 O 4 /Bi 2 MoO 6 ‐40 (CBMO-40) possessed great stability and structural integrity after six consecutive cycles. Furthermore, the CBMO-40 in PEF-like system showed superior performance for the removal of diverse antibiotics, including quinolones, tetracyclines and sulfonamides, which revealed the broad applicability of CBMO-40 for the antibiotics removal in PEF-like system.
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
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 6
·2898-2907
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IF 3.925
Juan Qiu,Yingdi Wang,Xiang Liu
We synthesized a CuBi2O4/BiOCl p–n heterojunction photocatalyst by a convenient one-pot hydrothermal method. And the morphology, crystal phase, element composition and optical properties of as-synthesized CuBi2O4/BiOCl were analyzed utilizing SEM, EDS, TEM, XRD, XPS, UV-visible DRS, PL and EIS techniques. Under visible light, the CuBi2O4/BiOCl p–n heterojunction exhibits excellent photocatalytic activity for the degradation of tetracycline hydrochloride, and when the CuBi2O4 content in the heterojunction is 20 wt%, the photocatalytic activity of the CuBi2O4/BiOCl heterojunction is the highest, which is 58.2 times and 4.1 times that of pristine CuBi2O4 and BiOCl, respectively. The photocatalytic activity of the heterojunction increased with the enhancement of visible light absorption and the effective separation of photogenerated electron–hole pairs which is promoted by the built-in electric field. In addition, a radical trapping study showed that h+ and ˙O2− radicals were the main active species in the photocatalytic process. On this basis, the possible photocatalytic mechanism was discussed.
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 CATALYSIS
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2023
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IF 7.3
Guorui Liu,Rong Cai,Zhenli Lv,Guorui Ma,Jing Li,Jun Jin,Xin Zhong,Feng Li
Low light absorption efficiency and short carrier diffusion length mainly restrict the use of CuBi 2 O 4 as a photocathode for an efficient photoelectrocatalytic CO 2 reduction reaction (PEC-CO 2 RR). These inadequacies are alleviated by fabricating CuBi 2 O 4 inverse opal photocathode modify with plasmonic Ag nanoparticles (CuBi 2 O 4 IOs-Ag) by using a sacrificing template method. The CuBi 2 O 4 IOs-Ag photocathode exhibits superior PEC-CO 2 RR-to-CO performance with a Faraday efficiency (FE) of 92% at 0.2 V versus reversible hydrogen electrode, and this value is roughly 1.6 times that of the pristine CuBi 2 O 4 thin film. Detail characterization and experiments reveal that the exceptional three-dimensional (3D) order structure simultaneously accelerates the mass transfer rates and enhances the light-harvesting efficiency. In addition, the introduction of Ag nanoparticles remarkably improves the surface charge distribution by forming an ohmic contact with CuBi 2 O 4 . Consequently, carrier recombination is efficiently inhibited, and the carrier dynamics behavior is improved. This work provides important insights into the design of high-performance photoelectrocatalytic systems for CO 2 reduction by engineering the microstructure of catalysts with localized surface plasmon resonance effect.
研究领域:
材料科学
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光电化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Wenxiao Zhang,Zize Zhao,Ziyang Zhu,Li Zhang,Xiaohui Xu,Xuemei Chen,Xinyan Wang,Min Lu
The rapid development of high-performance electrode materials for asymmetric supercapacitors (ASCs) needs to solve the bottleneck problem of low energy density. Compared with the positive electrode material, the development of the negative electrode material is relatively lagging and has become one of the key "short board" to limit the energy density of the supercapacitor device. In this study, the oxygen vacancy-rich CuBi 2 O 4 nanoparticles are triumphantly anchored on the interface of rod-like Bi 2 O 3 after calcination to prepare the heterostructure CuBi 2 O 4 /Bi 2 O 3 (CBO/BO) composites by the combination of simple hydrothermal process and calcination. Due to the unique anchoring mode, heterogeneous structure, and oxygen vacancy introduction, the CBO/BO as the cathode processes the capacitance of 294.7 mAh g −1 at 1 A g −1 . In addition, bimetallic NiCo layered double hydroxides (NCL) with the 3D flower-like structure prepared by a one-pot process is used as the positive electrode and the specific capacitance of 186.7 mAh g −1 at 1 A g −1 . The assembled water-based NCL//CBO/BO ASC triumphantly amplifies the potential window to 1.7 V, achieves the ultrahigh energy density between 91.8 and 52.9 Wh kg −1 at 850–8500 W kg −1 , and maintains the remarkable cycle consistency. Density functional theory calculation fully proves that oxygen vacancy and copper doping can significantly improve the electrochemical performance of electrode materials. Therefore, the research results in this paper afforded a feasible way to further develop asymmetric supercapacitors with ultrahigh energy density.
研究领域:
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
TALANTA
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2021
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IF 6.057
Qian Wang,Huanshun Yin,Jia Ding,Xi Fang,Yunlei Zhou,Shiyun Ai
The endogenous epigenetic marker 5-formylcytosine (5 fC) is introduced by 5-methylcytosine (5 mC) oxidation under action of enzyme oxidation, and plays an important role in many life activities. Since the content of 5 fC in mammalian tissues and cells is very low, it is necessary to exploit a sensitive and specific detection method to further understand the function of 5 fC. In this work, a sensitively and selectively photoelectrochemical (PEC) biosensor was developed for 5-formyl-2′-deoxycytidine (5fdC) detection. CuBi 2 O 4 /ZnPc@WS 2 was used as photoactive material, where the formed ternary heterojunction structure greatly enhanced the PEC response and increased the detection sensitivity. Positively charged polyethyleneimine (PEI) was employed as 5fdC recognition and capture unit, where the amine group on PEI specifically reacted with aldehyde group of 5fdC to form stable amide bond. 4-Carboxyphenylboronic acid (4-CPBA) was adopted as crosslinker for 5fdC and amino functionalized CuBi 2 O 4 based on the covalent interaction between 1,3-diol bond on 5fdC and boric acid structure on 4-CPBA, and the covalent interaction between –COOH on 4-CPBA and –NH 2 on amino functionalized CuBi 2 O 4 . On the basis of the positive synergistic effect of ZnPc and CuBi 2 O 4 on improving the photoelectric performance of WS 2 , the separation of photo-generated electron-hole pairs in semiconductors were promoted, and the examination range was expanded from 0.1 to 500 nM, and the detection limit was 0.0483 nM (3σ). Based on the unique covalent reaction between –NH 2 and –CHO, the PEC biosensor has excellent detection sensitivity, and can even separate 5fdC from 5-methylcytosine deoxyribonucleoside and 5-hydroxymethylcytosine deoxyribonucleoside. The effect of antibiotics and heavy metals on the 5fdC content in wheat tissue genome has also been further investigated using this sensor.
研究领域:
分析化学
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生物化学
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材料科学
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纳米技术
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2022
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IF 12.545
Xiao Chen,Wenqin Wu,Qi Zhang,Cheng Wang,Yingying Fan,Huimin Wu,Zhaowei Zhang
Designing a photoelectrochemical (PEC) biosensor with preponderant sensitivity and anti-interference is a challenge for detecting small molecules in real samples with complex matrices . To this end, the Bi 2 O 3 /CuBi 2 O 4 was synthesized in one step to enhance visible light's absorption ability, transferring the interfacial carrier's efficiency, a high-active Z-scheme heterojunction , and a photocathode biosensor was proposed. For the first time, we used the density functional theory to verify a Z-scheme transfer pathway of photogenerated electrons in Bi 2 O 3 /CuBi 2 O 4 and the energy band structure of Bi 2 O 3 and CuBi 2 O 4 , respectively. Bi 2 O 3 /CuBi 2 O 4 -based PEC biosensor was developed for competive immunoassay of small molecular, aflatoxin B1 (AFB1) as an example, resulting in a low detection limit of 297.4 fg/mL and a linear range of 1.4 pg/mL-280 ng/mL in urine, water, peanut, and wheat samples. Using spiked experiments, the satisfied repeatability, reproducibility, stability, and specificity of the Bi 2 O 3 /CuBi 2 O 4 -based PEC biosensor indicated a promise for application in health care, the environment, and food.
研究领域:
分析化学
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环境科学
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食品科学
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生物技术
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材料科学
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产品关联
DOI
PubMed
高影响因子
Catalysts
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2024
·Vol. 14
·期 5
·289
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IF 3.8
Sai An,Ying Wang,Huajian Qiao,Hao Xiu,Deyu Liu,Yongbo Kuang
Photoelectrocatalytic approaches show promise for contaminate removal in wastewater through redox reactions. However, the direct treatment of very low concentration heavy metals is a challenging task. Copper bismuth oxide is considered as a potential photocathode material due to its appropriate bandgap width and excellent light absorption properties. In this work, we utilize copper bismuth oxide photoelectrodes with micrometer-scale pores to achieve the efficient and complete reduction of micromolar-level hexavalent chromium(VI) in wastewater. In a continuous 180 min experiment, the reduction rate of 5 µM hexavalent chromium reached 97%, which is an order lower than the drinking standard. Such a process was facilitated by the unique hierarchical microstructure of the oxide thin film and the porous morphology. On the other hand, the structural evolution during the operation was analyzed. A surface passivation was observed, suggesting the possible long-term practical application of this material. This study serves as an important reference for the application of photoelectrocatalysis in addressing Cr(VI) pollution in wastewater, with implications for improving water quality and environmental protection.
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
Reaction Kinetics Mechanisms and Catalysis
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2024
·Vol. 137
·期 2
·1225-1238
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IF 1.7
Wang Wanchun,Chi Yangxu,Sun Jiahong,Zhou Feng,Zhan Su
In this work, Ag/CuBi 2 O 4 composite photocatalyst films with excellent photocatalytic sterilization properties were prepared by photodeposition. The photocatalytic activity of silver-modified CuBi 2 O 4 (Ag/CuBi 2 O 4 ) under the photocatalytic-Fenton coupling system was verified by its inactivation rate of Escherichia coli in seawater. The results showed that the photocatalytic sterilizing performance of CuBi 2 O 4 loaded with Ag in the presence of trace amounts of H 2 O 2 was significantly improved. 15Ag/CuBi 2 O 4 possessed the optimal photocatalytic activity, and its sterilizing rate in 30 min could reach 96.6%. Its sterilization rate in 30 min could reach 96.6%, which is about 70% higher than that of pure CuBi 2 O 4 . Meanwhile, the mechanism of the enhanced sterilization performance of Ag/CuBi 2 O 4 in the photocatalytic-Fenton coupled system was investigated. Firstly, according to the electrochemical results, the loading of Ag can significantly improve the charge separation efficiency of CuBi 2 O 4 . And promotes the conversion of H 2 O 2 to hydroxyl radicals(·OH); Secondly, the valence band potential of 15Ag/CuBi 2 O 4 is more positive than that of CuBi 2 O 4 , which suggests that Ag loading can enhance the oxidation of CuBi 2 O 4 cavities. Comprehensive radical trapping experiments demonstrate that ·OH and holes (h + ) are the main active species for inactivating Escherichia coli (E. coli). In this work, effective conversion of H 2 O 2 to ·OH in a wide spectral range was achieved by loading Ag nanoparticles on the surface of CuBi 2 O 4 , which provides a new idea for the development of photocatalytic-Fenton coupling technology and ballast water treatment. Graphical abstract
研究领域:
环境科学
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材料科学
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光催化
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微生物学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yejin Wang,Di Li,Miao He,Anqi Li,Jian Zhang,Yu Yang,Xuzhong Zeng,Xuening Bai,Xueming Li,Wenjing Yang
The Al/3DOM-CuBi 2 O 4 nanothermites with different contact extents were prepared using PMMA as a template. • 156 nm Al/3DOM-CuBi 2 O 4 has the best heat release and ignition characteristic. • DFT insights confirm strong electron transfer and adsorption capability in Al/CuBi 2 O 4 . • This thick microchip can be destroyed within a transient reaction for only 4 ms. Self-destructing microchips based on thermite reactions have emerged as an effective strategy for information security. However, conventional nanothermites suffer from unbalanced heat release, gas generation and pressure output, which severely restrict their destructive efficiency. Herein, we fabricated a three dimensionally ordered macroporous (3DOM) CuBi 2 O 4 /Al energetic composite via polymethyl methacrylate (PMMA) colloidal templating approach. Attributing to both the tunable pore sizes and distinct 3D structure of the CuBi 2 O 4 framework, the interfacial contact and diffusion length between fuel and oxidant can be effectively regulated. As a result, among the investigated samples, the system with a pore size of 156 nm exhibits the highest heat release of 1610.84 J/g, together with a peak pressure of 266 kPa and a pressurization rate of 1315 MPa/s. The optimized performance originates from an optimized balance between fuel-oxidizer interfacial contact and oxygen transport at an appropriate length scale, enabling efficient reaction propagation and enhanced reaction completeness. The 3DOM framework promotes uniform fuel distribution and efficient interfacial interactions, thereby facilitating rapid energy release. Density functional theory calculations further reveal enhanced electron transfer at the interface, supporting the accelerated reaction kinetics. More importantly, the fabricated energetic microchip can achieve complete physical self-destruction within 4 ms. The favorable combustion performance of Al/3DOM-CuBi 2 O 4 reveals the dependability of our proffered strategy for enhancing information security. Download: Download high-res image (208KB) Download: Download full-size image
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DOI
高影响因子
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