JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 333
·期 1
·545-556
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IF 1.6
Tang Haoming,Zhang Mingzhu,Ran Fengya,Sun Shiyong,Golubev Yevgeny Aleksandrovich,Zhao Qian,Lin Sen,Duan Tao,Kotova Olga Borisovna
The Cu 2 O/Cu modified shungite (ShC) absorbent (Cu 2 O/Cu-ShC) was synthesized by hydrothermal method, benefiting from the mineral backbone and Cu 2 O/Cu particles, Cu 2 O/Cu-ShC can remove ~ 96% of I − within 60 min, the batch experiments showed that the I − adsorption process follows pseudo-second-order model and Langmuir model with maximum adsorption capacity of 10.99 mg/g. The high binding affinity between Cu + and I − contributes effective removal of I − and excellent selectivity at high concentrations of competing ions. This work highlights the feasibility of Cu 2 O/Cu-ShC for the radioactive iodine separation, and provides a promising sorbent material for large-scale purification of radioactive iodine anions in wastewater.
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
MICROPOROUS AND MESOPOROUS MATERIALS
·
2015
·
IF 3.453
Hai-Xin Qi,Shang-Ru Zhai,Zhen-Zhen Wang,Bin Zhai,Qing-Da An
Adsorptive desulfurization (ADS) is an effective method for the selective capture of thiophenic sulfur compounds , and the ADS capacity of an adsorbent has been demonstrated to strongly depend on the dispersion degree of active species. Herein, series of zirconia-modified SBA-15 (ZrSBA-15) framework with uniformly dispersed Cu sites have been prepared via a urea-assisted homogeneous deposition strategy, aiming for efficient adsorption towards thiophene . The resultant materials were thoroughly characterized by X-ray diffraction (XRD), N 2 adsorption–desorption isotherms, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance spectra (DRS) analysis techniques. It was revealed that the Cu species were highly dispersed inside the ordered ZrSBA-15 framework with platelet morphology, rather than aggregation outside the surface, leading to excellent adsorption capacity for thiophene (up to 9.35 mg/g at 50 °C). The adsorption kinetics and isotherm data can be well described by the pseudo-second-order kinetics model and the Langmuir isotherm, respectively. Spent adsorbent can be regenerated by simple heating treatment in N 2 at 500 °C, without obvious losing of thiophene adsorption capacity even after eight cycles.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ying Huang,Juan Lei,Baobao Bai,Xiaoli Ren,Lijun Cheng,Yu Cao,Shuang Wang,Jinping Li
Traditional powder catalysts are not suitable for industrial applications due to low utilization of active phase and easy sintering. Therefore, monolithic catalyst MCCF with good stability and water-resistance was designed for the catalytic oxidation of toluene-acetone mixture, in which amorphous MnO x derived via pyrolysis of Mn-MOFs loaded on copper foam (CF) and different transition layers were employed between MnO x and CF to regulate Cu-Mn interaction. The combined action of amorphous MnO x and the Cu-Mn strong interaction enhanced the catalytic degradation of toluene-acetone mixture. The existence of amorphous MnO x and the impacts of Cu-Mn interaction on weakening Mn-O bonds and stimulating reactive oxygen species were verified by various characterizations. Furthermore, the reaction pathways of toluene and acetone on catalyst MCCF were revealed as well as their interactions within the mixture.
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
Frontiers in Pharmacology
·
2025
·
IF 4.8
Sitong Lai,Kunhui Sun,Yun Wu,Xueyuan Wu,Yiqi Yan,Guojing Liu,Xiaoyi Liu,Yuanyuan Ge,Lina Zeng,Ziyu Guo,Shuhong Wang,Ping Wang,Bing Wang,Han Zhang,Xie-an Yu
Introduction: The procedural complexity and time-consuming of conventional pesticide residue detection methods in traditional Chinese medicines (TCMs) significantly impeded their application in modern systems. To address this, this study presented an innovative dual-mode sensor driven by Cu2+/Cu+ redox-cycling, which achieved efficient signal transduction from enzyme inhibition to optical response for rapid acetylcholinesterase (AChE) activity and organophosphorus pesticide (OP) residue detection.Methods: The AB-Cu NPs sensor, a dynamic redox-responsive system, was constructed via coordination-driven assembly of Azo-Bodipy 685 (AB 685) and Cu2+. Initially, Cu2+ quenched the optical signals of AB 685 through photoinduced electron transfer (PET), maintaining an “OFF” state. Upon AChE-catalyzed hydrolysis of acetylthiocholine chloride (ATChCl) to thiocholine (TCh), Cu2+ was reduced to Cu+, thereby activating dual ultraviolet-visible (UV-Vis)/fluorescence (FL) signals (“ON” state). OP residues were quantified by their inhibition of AChE, which blocked Cu2+/Cu+ conversion and suppressed signal generation.Results: The sensor exhibited positive sensitivity with detection limits of 0.0327 U/L for AChE activity and 1.72 ng/mL for triazophos, leveraging Cu2+/Cu+ redox-cycling for signal amplification. Notably, the Cu2+/Cu+ valence interconversion coupled enzyme inhibition with probe responsiveness, ensuring the both procedural easily and rapid response.Discussion: This study developed a portable detection platform based on valence interconversion coupled enzyme inhibition with probe responsiveness. The dual-signal output enhanced reliability and the redox-driven mechanism enabled signal amplification. This advancement provided a real-time, portable and rapid detection for AChE activity and pesticide exposure of TCMs, bridging gaps in agricultural safety and pharmaceutical standardization.
研究领域:
生物传感器
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分析化学
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环境监测
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酶学
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食品安全
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药物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yapeng Yao,Xiaodong Gou,Wei Liu,Zihang Liang,Jiangbo Zhang,Zhongliang Ma
Integrating energetic materials into microelectromechanical system (MEMS) to enhance their energy output characteristics has shown extensive potential across aerospace, defense, and civilian applications. Within this study, the MEMS compatible Cu/DNBT (DNBT = [5,5′-dinitro-3,3′-bi(1,2,4-triazole)]) and Cu/DNBT@nano-Al energetic films were successfully synthesized on the copper substrate using an electrochemical method and a drip coating method. The scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential thermal analyses (DTA), and a pulse laser ignition test were used to analyze the morphology, composition, thermal performance, and ignition properties of the prepared samples. The findings indicate that the prepared Cu/DNBT and Cu/DNBT@nano-Al energetic films exhibit a nanostructure, and their morphology can be effectively regulated via modifications to the deposition voltage, deposition time, and aluminum plating frequency. Furthermore, the energetic properties of Cu/DNBT@nano-Al films can be adjusted after the deposition of nano-Al. Their heat release, flame height and ignition duration can reach up to 1823.1 J·g–1, 13.5 mm, and 400 μs, respectively. These findings suggest that Cu/DNBT@nano-Al energetic films being a prime contender for initiating powders in MEMS pyrotechnics. In summary, this work offers valuable insights into the integration and application of energetic materials in MEMS ignition devices.
研究领域:
材料科学
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化学工程
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机械工程
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航空航天工程
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国防技术
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Yanan Liu,Jiaying Zhao,Junting Feng,Yufei He,Yiyun Du,Dianqing Li
Environmental benign non-noble NiCu catalysts with well-distributed homogeneous nanoalloy structure was fabricated from layered double hydroxide for semi-hydrogenation of acetylene. Compared with monometallic Ni catalyst, the introduction of Cu enhanced ethene selectivity and decreased the deactivation rate in long-term reaction. Furthermore, to give a thorough understanding on structure dependent performance, conventional impregnation was also used to obtain bimetallic NiCu catalyst for comparison. Interestingly, imp-NiCu/MMO presented the mixture of monometallic Ni, Cu and bimetallic NiCu. Catalytic results indicated that 100% conversion was achieved at 160 °C with improved selectivity (>70%) over NiCu nanoalloy catalyst, while bimetallic NiCu catalyst with mixed structure showed both poor conversion (50%) and selectivity (65%). Enhanced activity was attributed to small particle size (3.2 nm) and high metal dispersion (31.4%). Improved selectivity and anti-coking ability were related to the alloying of Ni with Cu, which was conducive to isolate Ni atoms from one another confirmed by STEM-EDX and transfer electron from Cu to Ni certified by XPS. Additionally, superior performance was also found in semi-hydrogenations of hexyne, phenylacetylene, 1,2-diphenylethyne and ethyl phenylpropiolate over NiCu nanoalloy.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ping Li,Huanhuan Wu,Chengming Zhang,Quangui Liang,Huihui Ding,Haibao Zhu,Jun Ma,Xiang Li,Shuangshuang Huai,Congliang Cheng,Xiufang Wang
The lack of active sites and the low availability of photoelectrons severely limit the photocatalytic reduction of nitrogen to ammonia in semiconductor materials. Here, we successfully designed a BiOBr/O v -TiO 2 -Cu heterojunction catalyst toward N 2 fixation into NH 3 . The optimized BiOBr/O v -TiO 2 -Cu heterojunction has a promising photocatalytic performance and stability with the highest NH 3 yield of 259.82 μmol·g −1 ·h −1 . The combination of detailed theoretical simulation calculations and comprehensive characterizations indicates the BiOBr/O v -TiO 2 -Cu heterojunction with oxygen vacancy (O v ) stabilized Cu nanoparticles (NPs) as active sites can effectively adsorb and activate N 2 molecules. The close contact between BiOBr and Ov-TiO 2 elevates the quick transmission of photogenerated electrons at the interface and the enrichment on Cu NPs. This work not only provides an efficient photocatalyst for the N 2 reduction, but also supplies theoretical support for identifying the active sites and charge transfer kinetics of the nitrogen reduction reaction.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Sajid Ali,Xingwen Cha,Jinxin He,Muhammad Ubaid Ali,Muhammad Junaid Aslam,Songbo Chen,Kok Bing Tan,Guowu Zhan
Tunable electronic properties of supported Cu/CeO2 catalysts are critical for improving the active site activity in catalysis. In this contribution, we propose a surface engineering protocol that utilizes unique ascorbic acid (AA) properties to generate surface defects and modify the electronic properties of Cu–Ce catalysts. This approach relies on forming abundant (Ce3+-Ov) defective sites on the CeO2 surface synthesized with a Ce-benzene-tricarboxylate metal–organic framework (MOF) as a precursor through AA adsorption. Subsequently, Cu sites can be effectively anchored onto the generated Ce3+-Ov, exhibiting excellent electronic transfer between (Ce3+-Ov/Ce4+ ↔ Cu2+/Cu+) CuCe, resulting in highly active Cu+ with well-balanced Ce3+-Ov defects. A high fraction of Cu+ with Ce3+-Ov was dedicated to the presence of AA. The resultant Cu/AA-MOF-CeO2 catalyst demonstrated outstanding performance toward CO oxidation (90–95 °C), being far superior to that of the conventionally prepared Cu/MOF-CeO2 catalyst (110–115 °C). In-depth characterizations confirmed that the remarkable performance was considerably related to the enhanced Cu–Ce interaction, enriched Cu+ active sites, and balanced Ce3+-Ov defects. This work highlights the potential of the Cu/AA-MOF-CeO2 catalyst as a sustainable solution for low-temperature catalytic CO oxidation reaction.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 44
·e202403927
·
IF 1.9
Hui Han,He Cui,Jiabo Wang,Kai Ge,Yongfang Yang
Graphical In this paper, 2D MOF-Co, 2D MOF-Co/Cu, and 2D MOF-Co/Cu/Fe are designed and prepared using 1,4-benzendicarboxylic acid (1,4-BDC) as organic ligands. Their charge transfer, separation efficiency, and effects on photocatalytic CO 2 reduction are studied. The results show that 2D multimetallic MOF-Co/Cu/Fe has better photocatalytic CO 2 reduction activity, so it has higher research value and development prospect in the field of photocatalytic CO 2 reduction. In this study, 2D multimetallic MOFs combined with the advantages of 2D nanosheets, with the synergetic effect of multimetallic nodes, exhibited good photocatalytic activity for reduction of CO 2 . Herein, a 2D MOF-Co/Cu/Fe were successfully prepared via one-pot stirring of the solutions of multimetal salts and organic ligands at room temperature. Introduction of the second and third metal (Cu and Fe) into MOF-Co does not change the 2D morphology of MOFs, although it improved the photocatalytic CO 2 reduction performance by broadening the light absorption range of 2D MOF-Co, accelerating the separation efficiency and transfer rate of photogenerated carriers. Upon irradiation with full-spectrum light, the average CO yield of 2D MOF-Co/Cu/Fe achieved 17.06 µmol·g −1 ·h −1 , being about 1.8 and 1.2 times that of 2D MOF-Co and 2D MOF-Co/Cu. This work provides an insight into 2D multimetallic MOFs-based photocatalysts in catalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jun Wu,Wenzhong Zhang,Chunping Li,Erdan Hu
The effects of Fe(III) and Cu(II) on the sorption of atrazine (AT) and prometryn (PY) on clay minerals were investigated both preloaded and in solution. For smectite , Fe(III) preloading greatly enhanced AT and PY sorption at pH 4.0 and 6.0 but diminished AT sorption at pH 8.0. Cu(II) preloading promoted AT and PY sorption under alkaline conditions but suppressed AT sorption at pH 4.0. The adverse effects were not obvious for PY. While for illite and kaolinite , Fe(III) and Cu(II) had little or promotion effects due to the lower contents of them in these two minerals. In the co-sorption studies, for smectite, AT sorption remained at pH 4.0 and increased at pH 6.0 and 8.0, while PY sorption was inhabited over the pH range of 4.0–8.0 in the presence of Fe(III). AT and PY sorption were not affected by Cu(II) except for PY at pH 8.0, in which case, the sorption was promoted. For illite and kaolinite , Fe(III) and Cu(II) generally enhanced AT and PY sorption.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 5
·2697-2704
·
IF 1.491
Liu Shuai,Peng Nan,Bai Yu,Ma Dayan,Ma Fei,Xu Kewei
Cu-doped Bi 2 Te 3 hexagonal nanoplates were fabricated by a simple solvothermal method. Scanning electron microscopy and transmission electron microscopy characterization illustrated that the nanoplates are single-crystal ones with an average width of 300 nm and thickness in the range of 20–30 nm. It was demonstrated that Cu
x
Bi 2 Te 3 nanoplates possess the lowest thermal conductivity (0.8–1.2 W/m K) at 300 K, which is mainly due to the enhanced phonon scattering by grain boundaries. Furthermore, the doped Cu could evidently enhance the power factor of Bi 2 Te 3 through optimizing the carrier transport properties. As a result, Cu 0.02 Bi 2 Te 3 nanoplates exhibit the best thermoelectric performance with a figure of merit of 0.33, which is more than two times higher than that of Bi 2 Te 3 nanoplates.
研究领域:
材料科学
·
热电材料研究
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 30
·8105-8114
·
IF 5.976
Ping Gao,Xiang-Ying Sun,Bin Liu,Hui-Ting Lian,Xin-Qiang Liu,Jiang-Shan Shen
Developing a catalyst with a uniform and well-defined crystal structure is very important to establish a catalytic sensing system with high efficiency. In this work, Cu-BTC metal–organic frameworks (MOFs) without a crystalline CuO or Cu2O phase were successfully synthesized by using a low temperature synthesis method, and the as-prepared Cu-BTC MOFs were found to have outstanding catalytic activity towards the traditional oxidase substrate, o-phenylenediamine (OPD), to generate a colored and fluorescent product. The results of the kinetics analysis revealed that the catalytic behavior of Cu-BTC MOFs towards OPD could well follow the typical Michaelis–Menten equation, indicative of a strong affinity between Cu-BTC MOFs and OPD. On the basis of these findings, taken together the condensation reaction between the –CHO group of formaldehyde and the –NH2 group of OPD to form Schiff base compounds, a novel Cu-BTC MOF-based catalytic sensing system for detecting gaseous formaldehyde could be successfully established.
研究领域:
催化
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）