APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yanjun Wang,Yuancai Lv,Yifan Liu,Minghua Liu
Rapid industrial growth and widespread fertilizer application have led to nitrate contamination in water, threatening ecosystems and human health. There is growing interest in developing electrocatalysts to convert nitrates into ammonia, enabling wastewater recycling and transforming harmful substances into valuable ammonia. In this study, we presented an eco-friendly, cost-effective electrocatalyst suitable for large-scale industrial production. It was designed specifically for the electrochemical reduction of NO 3 – to NH 3 (NO 3 − RR). Cu 2 O nanoparticles were synthesized on Cu foam through a simple one-step in situ growth approach. The conversion of Cu + , serving as the active site during NO 3 − RR, into nanoscale Cu had been investigated. Cu + sites initiated the conversion of nitrate to nitrite and subsequently facilitated the reduction of nitrite to ammonia while being transformed into nano-grained Cu. The newly generated Cu, with a larger specific surface area and lower charge transfer resistance, improved Faradaic efficiency (FE) for NH 3 in the NO 3 − RR process. As a result, an impressive nitrate removal rate of 100 % and a relatively high ammonia yield rate of 1514.67 µg h −1 cm −2 , along with a low residue of nitrite-N (0.21 ppm) can be achieved in solutions containing 100 ppm of nitrate-N.
研究领域:
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Yong Tang,Longshi Rao,Zongtao Li,Hanguang Lu,Caiman Yan,Shudong Yu,Xinrui Ding,Binhai Yu
A rapid synthetic method for highly photoluminescent (PL) nitrogen-doped carbon quantum dots (N-CQDs) was developed by using a microreactor with foamy copper having different porosities. By taking advantage of the foamy copper, we obtained a high quantum yield (QY) of 84.1%, which was more efficient than most of the previous reports. Compared to the procedure without adding foamy copper, the QY when foamy copper was used was two times higher. The formation mechanism of the N-CQDs, which involved molecular condensation and the formation of carbon cores, was demonstrated. To explore the relationship between the use of a microreactor with foamy copper having different porosities and the PL properties of the N-CQDs, Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis was employed. The results show that the surface functional groups and elemental contents influence the PL emission. We further demonstrate the application of the N-CQDs as probes for heavy metal ion detection. The results indicated that N-CQDs are very suitable for use as nanoprobes for Hg 2+ ion detection and that the lowest detection limit (LOD) for Hg 2+ is 2.104 nM, which is superior to many other research studies. This method highlights that the value of microreactor synthetic system as a tool for the environmental and hazard detection.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Pengcheng Jiao,Xiutao Yang,Yuying Wang,Hongwen Yu,Ying Zeng,Guopeng Zhu,Chunhui Wang,Deming Han
Rational design on the microstructure and chemical composition of transition metal-based electrode materials is critical for boosting electrochemical glucose detection. In this work, the hollow heterostructured CuO x @Co 3 O 4 nanotube arrays on Cu foam (CuO x @Co 3 O 4 NTAs/CF) were fabricated. Coupling Co 3 O 4 nanoparticles on CuO x nanotube modulates the electronic structure by heterostructure, enhancing charge transfer during electrocatalytic glucose oxidation. Moreover, the unique hierarchical tubular core-shell structure guarantees abundant well-distributed active sites and rapid pathways for glucose and electrolyte diffusion. Beneficial from the advanced structure, the sensor fabricated with CuO x @Co 3 O 4 NTAs/CF possesses a high sensitivity of 23347.4 μA mM⁻¹ cm⁻² at linear range of 10-527 μM and low limit of detection of 0.56 μM (S/N=3). In addition, the outstanding selectivity, reproducibility and long-term stability (94.5 % for 30 days) as well as good recovery rate in artificial saliva, sweat, and human serum samples are also accessible advantages for our fabricated sensor. The excellent sensing performance of CuO x @Co 3 O 4 NTAs/CF demonstrates its potential application for electrochemical glucose detection.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 15
·期 1
·47
·
IF 4.4
Yueyun Huang,Jiahua You,Yingru Ding,Yun Xie,Ting Wang,Fanglong Zhu,Weiping Gong,Zhenting Zhao
Non-enzymatic glucose detection is an effective strategy to control the blood glucose level of diabetic patients. A novel hierarchical core–shell structure of nickel hydroxide shell coated copper hydroxide core based on copper foam (Ni(OH)2@Cu(OH)2-CF) was fabricated and derived from NiO@Cu2O-CF for glucose sensing. Cyclic voltammetry and amperometry experiments have demonstrated the efficient electrochemical catalysis of glucose under alkaline conditions. The measurement displays that the fabricated sensor exhibits a detection scale of 0.005–4.5 mM with a detection sensitivity of 4.67 µA/µM/cm2. It has remarkable response/recovery times in respect of 750 μM glucose (1.0 s/3.5 s). Moreover, the NiO@Cu2O-CF shows significant selectivity, reliable reproducibility and long-term stability for glucose determination, suggesting it is a suitable candidate for further applications.
研究领域:
生物医学工程
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
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IF 6.064
Jianzhi Wang,Hongliang Yu,Xianming Wang,Chen Chen,Shuaijie Li,Ning Cai,Weimin Chen,Yanan Xue,Hui Li,Faquan Yu
Constructing ordered hierarchical porous electrocatalysts while maintaining their high efficiency and stability for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly desirable but still remains challenging. Herein, hierarchical tri-metal-based hollow nano/micro rod-on-rod array structures, including hydroxides and phosphates, are vertically grown on Cu foam by the cation-exchanging and anion exchanging approaches. Such ordered porous architecture, providing multi metal center, regular interconnection of macropore channel, large electrochemical surface area, small charge-transfer resistance, efficient mass transport and electron transfer for overall water splitting in alkaline media. These obtained hydroxide OER catalysts (CoMn LDH@Cu(OH) 2 /CF) and phosphide HER catalysts (CoMnP@Cu 3 P/CF) exhibited low onset potential, low Tafel slope, and prominent durability. Such excellent performance, ordered porous structure and simple preparation methods indicate that this study provides a new strategy for assembling promising catalysts for water splitting and other applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Ling Lu,Rundong Zhao,Huang Chen,Liang Tan,Dongxu Chen,Le Liu,Jingyu Xi
The nitrate reduction reaction (NO3RR) is a promising method for ammonia production, but detecting intermediate NO2− in situ during the reaction is challenging. We propose a nitrite concentration sensor based on equivalent absorbance change, comprising a light, absorption, and imaging module, with a linear detection range of 0–1.4 mg L−1. After optimizing the absorption module parameters and applying machine learning noise reduction, the detection limit is 0.0116 mg L−1. Using foam copper as the working electrode, we achieved real-time monitoring of nitrite concentration on the electrode surface during NO3RR, validating the sensor's design. When applied to Co Base/Cu electrodes synthesized via localized electrodeposition, the sensor shows significantly lower nitrite concentration in the electrodeposition area compared to the non-electrodeposition area during NO3RR, indicating superior nitrite utilization by cobalt-based materials. This sensor offers a new approach for investigating NO3RR mechanisms and designing catalysts.
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Caiyun Han,Yunfei Gao,Juan Lei,Shuang Wang
The development of efficient monolithic catalysts for CO 2 hydrogenation to methanol holds great significance in addressing the industrial application of Cu-based catalysts. In this study, a series of monolithic catalysts by coupling MOFs-derived oxides with Cu(OH) 2 transition layers loaded on copper foam (CF) are successfully prepared, in which the content of active Cu can be facilely controlled by tuning Cu(OH) 2 load. And various characterization results prove that the metal-oxide interface effect is successfully applied in monolithic catalysts. This strategy offers the unique advantage of constructing the rich metal-oxide interface over monolithic catalysts; thus, significantly enhances the methanol synthesis activity. Furthermore, utilizing this phenomenon, many yZC x CF (x = 1.25, 2.5) catalysts are synthesized by adjusting the amounts of MOFs-derived oxides, revealing an ideal Cu/Zn ratio may optimize the metal-oxide interface (Cu-ZnO interface) on the catalysts. Notably, the 4ZC 2.5 CF catalyst demonstrates the highest methanol space–time yield (STY) of 183 g·kg cat -1 ·h −1 and 150 h of stability. The “Cu(OH) 2 transition layer control interface” strategy proposed in this study provides the feasibility and key parameters in the large-scale preparation of monolithic catalysts.
研究领域:
催化化学
·
能源化学
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材料科学
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工业催化
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碳资源利用
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Pei Shen,Tiansheng Yang,Qichang Li,Zhi Chen,Yonglong Wang,Yunlei Fu,Jun Wan,Zexing Wu,Lei Wang
Developing efficient and stable catalysts for electrocatalytic hydrogen evolution reaction (HER) with low overpotential is the key point to realizing large-scale hydrogen commercialization. Herein, Ru doped amorphous hollow copper hydroxide nanowires on copper foam (Ru-Cu(OH) x /CF) is prepared by surface chemical oxidization and following solvothermal process. The hollow 3D nanowire structure can provide abundant accessibility active sites, promote electrolyte in filtration and facilitate gas diffusion in the process of the electrochemical reaction. Then, the as-synthesized Ru-Cu(OH) x /CF electrocatalyst exhibits impressive electrocatalytic performance for HER with 45, 80 and 50 mV to drive 10 mA cm −2 in 1.0 M KOH, 1.0 M phosphate-buffered saline (PBS) and 0.5 M H 2 SO 4 , respectively, with remarkable long-term stability. Moreover, sustainable energies can power the two-electrode setup with amounts of hydrogen generation. The strategy may be particularly beneficial to explore simple synthesis and high-performance catalysts for HER.
研究领域:
材料科学
·
电化学
·
催化
·
能量转换与存储
✓ 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）