Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Yunxia Zhuang,Xiaodan Zhang,Qiumeng Chen,Siqi Li,Haiyan Cao,Yuming Huang
Here, we report the synthesis, characterization, and oxidase-like activity of Co 3 O 4 /CuO hollow nanocage (HNC) nanocomposites. The Co 3 O 4 /CuO HNCs were successfully prepared by hydrothermal treatment of ZIF-67 in copper nitrate solution, followed by carbonization in air. The obtained nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The Co 3 O 4 /CuO HNCs possess enhanced oxidase-like activity compared with pure Co 3 O 4 and CuO, and they can catalytically oxidize the 3,3′,5,5′-tetramethylbenzidine (TMB) substrate in the absence of H 2 O 2 to produce an intense blue product. Reactive oxygen species (ROS) measurements indicate that 1 O 2 and O 2 − radicals are the major ROS in catalytic oxidation of TMB by dissolved oxygen in the TMB–Co 3 O 4 /CuO HNC system. We then developed a simple, sensitive, visual, and colorimetric biosensing method for dopamine (DA) based on its inhibiting effect on TMB oxidation. The proposed method allows for DA detection with a limit of detection of 0.027 μM and a dynamic range of 0.05–8 μM. This new colorimetric method was successfully used to detect DA in biological samples. The present work demonstrates a simple strategy to fabricate an efficient oxidase mimic with potential applications in bioanalysis and clinical diagnosis.
研究领域:
材料科学
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生物传感
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS ES&T Water
·
2025
·
IF 4.3
Rui Huang,Jingjing Xia,Yiding Wang,Zixuan Gao,Zeng Xue,Jinfeng Zhu,Ming Ming,Hongmin Zhao,Songxue Wang,Wenxiang Xia,Baoxiu Zhao
In this study, the CuO@ATT/AC catalyst was designed and synthesized by a simple process of immersion–doping–calcination to boost the catalytic performance toward peroxymonosulfate (PMS) and remove sulfadiazine (SDZ). The results of optimized preparation experiments indicated that the doping of the materials with AC markedly enhanced the activation of PMS, demonstrating not only superior catalytic performance but also a reduction in the leaching of Cu. The CuO@ATT/AC/PMS system achieved 96.5% SDZ removal within 60 min with only 0.03 mg/L of Cu leaching. In addition, the removal efficiency of SDZ reached above 90% across a wide pH range of 5–9 and operating temperature (25–35 °C). CuO@ATT/AC demonstrated exceptional stability and reusability, achieving a 95% removal rate for SDZ after five cycles. Furthermore, both radical and nonradical species were implicated in the degradation of SDZ. •OH, SO4•–, and 1O2 were identified as the primary reactive species involved in the system. This study presents an environmentally friendly and cost-effective composite catalyst for the degradation and elimination of organic contaminants in water.
研究领域:
环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lebao Mao,Hao Liu,Linli Yao,Wei Wen,Miao-Miao Chen,Xiuhua Zhang,Shengfu Wang
Aflatoxin B1 (AFB1) exposure often causes serious food safety problems and illnesses in humans and animals even at extremely low content. Therefore, ultrasensitive detection and effective degradation of AFB1 is vitally significant. Photoelectrochemical (PEC) approach has been widely applied in sensing and catalysis fields. For achieving robust PEC performance, exploring highly photoactive semiconductor materials is critical. Herein, we constructed a novel and dual-functional copper oxide/bismuth oxychloride (CuO/BiOCl) composite by in-situ growth of CuO on BiOCl surface. The photo-absorption region of CuO/BiOCl was efficaciously broadened from UV to visible range, making for enhanced light harvest. Meanwhile, the p-n heterostructure in CuO/BiOCl clarified that the formed built-in internal electric field could accelerate band-band transfer of carriers. Driven by this, PEC response of CuO/BiOCl was greatly boosted comparing with that of pure CuO or BiOCl. Further combing with the specific aptamer, a favorable CuO/BiOCl-based PEC biosensor was fabricated for AFB1 detection with ultra-sensitivity (detection limit of 0.07 pg mL −1 ) and satisfactory recoveries (96.4% ∼ 105.7%) in real maize samples. Subsequently, under light irradiation and suitable bias voltage, a degradation rate of ∼81.3% was facilely attained for 5.0 µg mL −1 AFB1, indicating excellent photoelectrocatalytic activity of CuO/BiOCl material. The catalytic mechanism and the main product of AFB1 degradation were analyzed. Taken together, the heterostructured CuO/BiOCl-based PEC assay provides a potential way for monitoring and controlling the AFB1 contamination in the food security areas.
研究领域:
食品安全
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Xinjian Zhou,Ruixuan Xu,Hongqi Nie,Qilong Yan,Jun Liu,Yunlan Sun
Burning rate modulation is a crucial but challenging technology for designing solid propellants. The core–shell structured Al@AP and Al@AP/CuO were prepared and their thermal reaction properties were investigated at different pressures. The precise catalytic mechanism of doped CuO in oxidizer and the key reason for its burning rate modulating effect on solid propellants were elucidated by combining DFT calculations. The *NH 4 ClO 4 on the CuO (1 1 1) surface is more likely to undergo a dehydrogenation reaction first. The large difference in activation energy between *NH 4 ClO 4 →*NH 3 +*ClO 4 +*H and *NH 4 ClO 4 → NH 3 + HClO 4 explains the reasons that CuO can reduce the ignition delay of the Al@AP. CuO promotes the decomposition of the AP@Al at the low- and high-temperature decomposition (LTD and HTD) stage. For the Al@AP-CuO, the temperature of the high-temperature decomposition peak (THTD) does not shift to the lower temperature range with increasing pressure. These results are responsible for a reduction of pressure exponent in the presence of minor CuO as reported in the literature. CuO can facilitate the transformation process *NH 3 →*NH 2 on the CuO (1 1 1) surface at low-temperature and low-pressure conditions. However, at high-temperature and high-pressure conditions, it can inhibit the reaction *NH 2 →*NH→*N, so the burning rate of solid propellants can be controlled.
研究领域:
材料科学
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化学工程
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Qiqi Wan,Zhuhao Chen,Ruihua Cao,Jingyi Wang,Tinglin Huang,Gang Wen,Jun Ma
Peroxymonosulfate (PMS)-based advanced oxidation process are widely used in the degradation of organic pollutants . The degradation of the electron-rich azo dye Acid Orange 7 (AO7) through a PMS/CuO heterogeneous system in borate and phosphate buffer were systematically investigated. The CuO was characterized via X-ray diffraction, scanning electron microscopy, fourier-transform infrared spectra, X-ray photoelectron spectroscopy and energy dispersive spectroscopy (SEM-EDS) techniques. The difference of AO7 degradation by PMS/CuO system in borate and phosphate buffer varied with the buffer concentration, PMS concentration, CuO dosage and pH. AO7 degradation fitted well with the pseudo-first order kinetics in these two buffer solutions , the reaction rate constant ( k obs ) of AO7 degradation in phosphate buffer increased with the increase of phosphate concentration firstly and then reached the maximum value of 0.0123 min −1 at 0.2 M, but it decreased obviously with the increase of borate concentration. It was found that the k obs in two buffers increased linearly with the increase of PMS concentration, and increased with the increase of CuO dosage in borate, while the reaction in phosphate buffer was slightly affected by CuO dosage. Additionally, the k obs increased from 0.0057 min −1 to 0.0487 min −1 with the increase of pH value in phosphate, but decreased gradually with the increase of pH value from 7.0 to 8.5 in borate due to the deprotonation of PMS. Fewer reactive species were produced in phosphate including SO 4 •– , •OH and 1 O 2 . The conversion between Cu(Ⅱ) and Cu(Ⅰ) was a crucial process for the activation of PMS by CuO in borate, which was hindered in phosphate. This study will provide a reference for the application of different types of buffers in heterogeneous catalysis of PMS.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
ChemElectroChem
·
2022
·Vol. 9
·期 15
·e202200529
·
IF 4.782
Xiao Wang,Qian Liu,Xiaopei Qiu,Yingran Wang,Hanqing Xu,Qingle Liang,Jun Wang,Mingxuan Gao,Jing Bao,Ming Chen
Graphical An ultra-fast and sensitive glucose sensor based on CuO nanoflowers coated stereo-graphene electrode on carbon cloth was developed. This kind of flexible enzyme-free glucose sensor has been successfully applied to the detection of glucose in actual serum samples and shows a good accuracy, which is likely be applied to the medical testing field and the commercial production and has potential to further applied in wearable sensors. Designing a highly sensitive, fast response, cheap, and flexible biosensing platform has important significance in the diagnosis of diabetes. Herein, we developed an ultra-fast and sensitive glucose sensor based on CuO nanoflowers-coated stereo-graphene electrode on carbon cloth. The three-dimensional graphene (3DG) nanostructures were established on the carbon cloth (CC) by radio frequency plasma enhanced chemical vapor deposition (RF-PECVD), and CuO nanoflowers subsequently obtained via chemical deposition. The prepared CuO@3DG@CC electrode with self-assembled structures provided abundant ion diffusion channels, large specific surface area and high conductivity, which shows an ultrasensitive current response to glucose. The detection limit of the sensor is as low as 0.068 μM and the response efficiency is as fast as 0.5 s. The electrode has two linear ranges with 0.5–115.5 μM and 165.5–1165.5 μM and has a strong anti-interference ability and shows an excellent stability. This kind of flexible enzyme-free glucose sensor has been successfully applied to the detection of glucose in actual serum samples and shows a good accuracy, which is likely be applied to the medical testing field and the commercial production and has potential to further applied in wearable sensors.
研究领域:
生物传感技术
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材料科学
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医学检测
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 69
·43689-43699
·
IF 3.108
Shengshuai Gao,Nan Zhou,Qingda An,Zuoyi Xiao,Shangru Zhai,Zhan Shi
Hetero-structured functional materials with tailored composition that can provide excellent electromagnetic wave (EMW) absorption with minimal thickness are highly desirable, especially if they can be easily fabricated. Herein, novel hetero-structured CoNi–CuO composite microspheres were fabricated via a facile solvothermal process. The composites with adjusted mass ratios of CuO to CoNi alloy (5/1, 2.5/1 and 1.25/1) were facilely achieved by modulating the quantity of CuCl2·2H2O during the synthesis. It was demonstrated that the enhanced microwave absorption properties could be ascribed to the dielectric CuO, which can favorably increase the interface of the hetero-structure and the impedance matching with CoNi alloyed particles. It was shown that, when the molar ratio was 2.5 : 1, the typical CoNi–CuO composite microspheres presented a promising microwave absorption performance, namely a maximum reflection loss (RL) of −25.1 dB at 13.2 GHz with a thickness of only 2.5 mm, while the effective microwave absorption bandwidth (RL < −10) could reach 3.4 GHz (from 10.0 to 13.4 GHz). As is demonstrated, this kind of newly fabricated CoNi–CuO composite can be regarded as a promising candidate for high-performance microwave absorption materials.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Quhan Chen,Xiang Luo,Guohao Mu,Xinyi Mao,Hongfeng Yin,Edward Henry Lester,Tao Wu
Electrochemical reduction of CO2 to valuable C2+ chemicals using renewable energy is a crucial pathway for sustainable development, replacing traditional nonrenewable feedstocks. In this study, CuO-based materials were synthesized with and without microwave heating as electrocatalysts for CO2 reduction. The CuO synthesized under microwave irradiation (MW-CuO) showed a similar morphology to the conventionally heated samples but exhibited a higher density of defect sites with increased grain boundaries (GBs). MW-CuO electrodes with a Cu2+ and CO32– reactant ratio of 1.1 showed superior catalytic performance under identical reaction conditions. In particular, the catalytic activity of the MW-CuO electrode at −1.04 V vs RHE for the C2+ products is 49.3% higher than that of the CuO electrode. A faradaic efficiency (FE) of 71.9% is achieved for C2+ products, which is among the highest yields reported for OD-Cu catalysts. The spent MW-CuO electrode exhibited a significantly higher Cu+ to Cu0 ratio compared to the CuO electrode. The synergy of Cu(I) species and defective surface features is speculated to be responsible for the improved CO2ER selectivity toward multicarbon products. However, the activity decreased for longer reactions, which was attributed to the loss of defect sites and Cu agglomerations. This study highlights the effectiveness of a simple synthesis approach for the production of defect-rich electrocatalysts that improve the efficiency and selectivity of CO2 reduction.
研究领域:
材料科学
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环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jun Wang,Bin Li,Yang Li,Xiaobin Fan,Fengbao Zhang,Guoliang Zhang,Yuanzhi Zhu,Wenchao Peng
In this work, γ-Al2O3-supported CuO (c-CuO/Al2O3) materials are successfully synthesized using a novel impregnation–precipitation–decomposition method. The obtained c-CuO/Al2O3 catalyst shows excellent catalytic activities for bisphenol A (BPA) degradation with sodium persulfate (PDS) as an oxidant. Radical quenching tests and electron paramagnetic resonance (EPR) studies indicate that PDS activation is a combined mechanism involving both free radical and nonfree radical pathways. In a continuous large-scale degradation process, about 1.78 L of 20 ppm BPA can be completely removed within 480 min. Although c-CuO/Al2O3 can be deactivated after several reaction cycles, the catalytic activity can be regenerated after simple aerobic calcination. X-ray photoelectron spectroscopy (XPS) and Raman analysis confirm that the deactivation of c-CuO/Al2O3 should be attributed to the conversion of Cu(II) to Cu(I). The aerobic calcination could oxidize Cu(I) back to Cu(II), thus recovering the catalytic activity. In addition, the density functional technology (DFT) and temperature-programmed oxidation (TPD) results reveal that γ-Al2O3 can not only serve as a carrier to anchor the CuO particles but also can adsorb and activate PDS by introducing more basic sites on the surface. c-CuO/Al2O3 has high activity and can be regenerated easily, thus having great potential applications for wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2020
·
IF 3.465
Bo Liu,Yangmei Li,Shengtao Xing
CuO can activate persulfate (PS) via radical and non-radical ways for organic pollutants removal, while bicarbonate can suppress the leaching of Cu. However, the key parameter affecting the performance of bicarbonate-CuO-PS is still unclear. Hence, in this work, four CuO samples were synthesized by different methods and used to activate PS in the presence of bicarbonate for removing different organic pollutants in water. The correlation between the surface properties of CuO and the activation efficiency of PS by different pathways was studied. The key reactive species for pollutants degradation were identified. The result indicates that the bicarbonate-CuO-PS process is effective not only for degradation but also for mineralization of organic pollutants. Activated PS generated via the non-radical pathway should be the dominant reactive species for pollutants removal . The Cu 2+ with more electron deficiency should be the active site for the generation of activated PS. Synthesis of CuO with high percentage of the aforementioned Cu 2+ and/or large surface area should be an effective way to promote the formation of activated PS. In addition, a novel method was developed to estimate the amount of activated PS, which is useful for investigating non-radical activation of PS. The finding of this work provides a possible way for enhancing the non-radical activation of PS with CuO, thus improving the performance of bicarbonate-CuO-PS.
研究领域:
环境科学
·
化学工程
·
污染控制
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Hairui Fang,Hong Chen,Rong Tan,Lei Ge,Tingting Zhao,Haochen Wang,Shenglin Yuan,Dong Wang
Sulfur dioxide (SO 2 ) is a toxic and harmful decomposition product generated during arc discharge or partial discharge in sulfur hexafluoride (SF 6 ) electrical equipment, which can corrode internal pipelines. Detecting SO 2 is crucial for assessing the insulation condition of equipment and preventing faults. To overcome the challenges faced by traditional SO 2 gas sensors, including high operating temperatures, slow response times, and poor moisture resistance, this paper proposes a novel SO 2 gas sensor based on CuO/MoO 3 . The morphology, composition, and chemical states of the materials were analyzed using different characterization techniques. At 90°C, the S2 sensor (CuO: MoO 3 =1: 1) exhibited a fast response time (10 s) to 10 ppm SO 2 and demonstrated good moisture resistance (a 1 % change in relative humidity (RH) has the same effect on the sensor as 25.9 ppb SO 2 ). The response of the S2 sensor to 100 ppm SO 2 was 26.5. Additionally, the voltage sensitivity of the S2 sensor at low (1–10 ppm) and high (10–100 ppm) concentrations are 658.74 mV/ppm and 33.43 mV/ppm, respectively. Therefore, the S2 sensor is more suitable for low concentration conditions. These good sensing characteristics of the S2 sensor are owing to the high content of oxygen vacancies (39.2 %) and the heterojunction effect in the composite material. Additionally, this sensor exhibits excellent anti-interference capabilities, including moisture resistance and high selectivity. Therefore, the CuO/MoO 3 -based SO 2 gas sensor can be effectively applied to detect the decomposition of SF 6 .
研究领域:
材料科学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 29
·16288-16295
·
IF 3.049
Shu-ying Zhen,Hai-tao Wu,Yan Wang,Na Li,Hao-sen Chen,Wei-li Song,Zhen-hua Wang,Wang Sun,Ke-ning Sun
Herein, hollow porous CuO–CuCo2O4 dodecahedrons are synthesized by using a simple self-sacrificial metal–organic framework (MOF) template, which resulted in dodecahedron morphology with hierarchically porous architecture. When evaluated as a cathodic electrocatalyst in lithium–oxygen batteries, the CuO–CuCo2O4 composite exhibits a significantly enhanced electrochemical performance, delivering an initial capacity of 6844 mA h g−1 with a remarkably decreased discharge/charge overpotential to 1.15 V (vs. Li/Li+) at a current density of 100 mA g−1 and showing excellent cyclic stability up to 111 charge/discharge cycles under a cut-off capacity of 1000 mA h g−1 at 400 mA g−1. The outstanding electrochemical performance of CuO–CuCo2O4 composite can be owing to the intrinsic catalytic activity, unique porous structure and the presence of substantial electrocatalytic sites. The ex situ XRD and SEM are also carried out to reveal the charge/discharge behavior and demonstrate the excellent reversibility of the CuO–CuCo2O4 based electrode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）