Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Chunhua Lin,Yue Du,Shiqi Wang,Li Wang,Yonghai Song
The work presents a novel glucose oxidase@Cu-hemin metal-organic frameworks (GOD@ Cu-hemin MOFs) with a ball-flower structure as bienzymatic catalysts for detection of glucose. The GOD@Cu-hemin MOFs exhibits great stability as compared with free horseradish peroxidase and GOD toward harsh conditions because the ball-flower-like shell of Cu-hemin MOF effectively protects from GOD. Thus, the GOD@Cu-Hemin MOFs can be used in external harsh conditions such as high temperature and acid/base. The GOD@Cu-hemin MOFs is capable of sensitive and selective detection of glucose via peroxidase-like of Cu-hemin MOFs and GOD by using 3,3′,5,5′-tetramethylbenzidine (TMB) as a substrate. Under the existence of glucose, O 2 is reduced into H 2 O 2 via GOD@Cu-hemin MOFs. The produced H 2 O 2 as well as Cu-hemin MOFs oxidize TMB into blue oxTMB which shows UV–Vis absorbance at 652. The absorption intensity of oxTMB linearly increases with the increasing concentration of glucose from 0.01 to 1.0 mM with detection limit of 2.8 μM. An integrated agarose hydrogel film (Aga/GOD@Cu-hemin MOF/TMB) sensor is rationally designed for colorimetric detection of glucose. The sensor displays a response range of 30 μM-0.8 mM with a detection limit of 0.01 mM. The result indicates that the Cu-hemin MOFs are an ideal carrier for the encapsulation of enzymes.
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DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Bowen Lu,Zewu Zhang,Xiaoshan Li,Cong Luo,Yongqing Xu,Liqi Zhang
Cu catalysts have been widely used in CO 2 utilization due to their low reduction temperature and excellent CO 2 hydrogenation performance. It is important to well design Cu catalyst with high efficiency and durability for CO 2 hydrogenation. In this work, CuCe(rod) catalysts with various Cu contents were prepared. The physicochemical properties of the CuCe(rod) catalysts were described by XRD, TEM, N 2 -physisorption and H 2 -TPR.The effect of Cu content on catalytic performance of CO 2 hydrogenation with CuCe(rod) catalysts was also studied. Results showed that a high Cu content enhanced CO 2 conversion. The 40CuCe(rod) catalyst exhibited the best CO 2 conversion performance. At the reaction temperature of 400 °C, the CO production rate (CO 2 conversion) and CO selectivity based on the 40CuCe(rod) catalyst could reach 1.69 mol/g cat /h (41.1%) and nearly 100%, respectively. The analysis of kinetic measurements revealed that the activation energy of the 40CuCe(rod) catalyst was lower than that of other catalysts with different Cu contents during a reverse water–gas shift reaction. The lower activation energy and the interface structure of Cu-O x -Ce were closely related to CO 2 hydrogenation activity and remarkable stability for 96 h with minimal loss of CO 2 conversion activities.
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DOI
高影响因子
Nanoscale
·
2019
·Vol. 12
·期 3
·1811-1816
·
IF 6.97
Yongqin Liu,Liang Huang,Xinyang Zhu,Youxing Fang,Shaojun Dong
The electrochemical nitrogen reduction reaction (NRR) under ambient conditions is currently attracting intense attention, but it still remains a great challenge to develop highly selective and active NRR electrocatalysts. Inspired by the intrinsic NRR activity of Au, we systematically studied the synergistic enhanced effect of incorporating other transition metals into Au on its NRR activity. A general strategy was used to synthesize a series of Au-based bimetallic nanocatalysts (AuCu, AuAg, AuPd and AuRu), and the NRR catalytic performance of the as-obtained electrocatalysts was investigated in detail. The experimental results indicate that the positive effect of Cu on NRR was the most remarkable in comparison with that of Ag, Ru and Pd, which can be ascribed to the synergy of the Au and Cu components via modulating the electronic structure and further changing the binding affinity of adsorbed N atoms on the catalyst. Finally, the optimized nanocatalyst with the atom ratio of Au1Cu1 achieved the highest faradaic efficiency (54.96%) and ammonia yield rate (154.91 μg h−1 mgcat−1) at −0.2 V vs. RHE, exceeding those of the previously reported Au nanocatalysts.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2020
·
IF 6.146
Xiaona Liu,Yi Cao,Nana Yan,Chao Ma,Lei Cao,Peng Guo,Peng Tian,Zhongmin Liu
The high-temperature (HT) and low-temperature (LT) hydrothermal stabilities of molecular-sieve-based catalysts are important for the selective catalytic reduction of NO x with ammonia (NH 3 -SCR). In this paper, we report a catalyst, Cu 2+ loading SAPO-17, synthesized using cyclohexylamine (CHA), which is commercially available and inexpensive and is utilized in NH 3 -SCR reduction for the first time. After systematic investigations on the optimization of Si and Cu 2+ contents, it was concluded that Cu-SAPO-17-8.0%-0.22 displays favorable catalytic performance, even after being heated at 353 K for 24 h and at 973 K for 16 h. Moreover, the locations of CHAs, host–guest interaction and the Brönsted acid sites were explored by Rietveld refinement against powder X-ray diffraction data of as-made SAPO-17-8.0%. The refinement results showed that two CHAs exist within one eri cage and that the protonated CHA forms a hydrogen bond with O4, which indicates that the proton bonding with O4 will form the Brönsted acid site after the calcination .
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高影响因子
Materials Today Physics
·
2022
·
IF 11.021
X. Li,Z. Wang,J. Zhang,K. Dai,K. Fan,G. Dawson
The solar driven reduction of carbon dioxide (CO 2 ) to high value-added carbon based fuel is a promising solution to mitidate climate and energy problems, however, improving the adsorption and conversion efficiency of CO 2 in the photoreduction process still faces severe challenges. In this work, Cd 0·7 Zn 0·3 Se solid solution was prepared by cation exchange: selenium (Se) vacancies are produced during ion exchange, which promotes the unsaturated coordination of the surrounding metal atoms. The adsorption of diethylenetriamine (DETA) on the surface limits the growth of Cd x Zn 1- x Se crystallites , resulting in insufficient coordination of the surface atoms, which then become active adsorption sites. Furthermore, a heterojunction was formed with Cu 2 O@Cu to accelerate the separation and transfer of photo-induced carriers of Cd 0·7 Zn 0·3 Se, and the optimized Cd 0·7 Zn 0·3 Se/Cu 2 O@Cu (CZS/CC) step-scheme heterojunction exhibited a CO release activity of 50.5 μmol g −1 h −1 , which is 3.8 and 10.7 times higher than that of Cd 0·7 Zn 0·3 Se and Cu 2 O@Cu, respectively. This work is expected to open up new insight for the regulation of nanostructures and the design of selective catalysts.
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高影响因子
ChemNanoMat
·
2021
·Vol. 7
·期 11
·1213-1220
·
IF 3.154
Yang Liu,Yong Zhao,Yulong Zhao,Peng Jiang
Graphical We report an efficient and robust Cu-decorated Rh/TiO 2 catalyst that improves the styrene selectivity in selective hydrogenation of phenylacetylene. The appropriate Cu coverage is found to modulate the electronic states of surface Rh atoms and changes the Rh exposed active sites, thus mitigating the overhydrogenation and enhancing the selectivity. Phenylacetylene as an impurity in styrene is poisonous to catalysts for styrene polymerization in the production of polystyrene plastics. The selective hydrogenation of phenylacetylene to styrene is an industrially promising route to overcome this challenge yet lacks cost-effective catalysts to prevent the overhydrogenation of styrene to ethylbenzene. In this work, we report an efficient and robust copper-decorated Rh/TiO 2 catalyst for the selective hydrogenation of phenylacetylene to styrene. By optimizing the copper coverage on TiO 2 supported Rh nanoparticles, we achieved a selectivity of 83% towards styrene formation at a phenylacetylene conversion of 93%. The appropriate Cu coverage is found to modulate the electronic states of surface Rh atoms and changes the Rh exposed active sites, weakening the binding strength of alkene and hydrogen intermediates on Rh and thus mitigating the overhydrogenation and enhancing the selectivity for styrene generation. This work offers insights on the rational design of efficient Rh-based bimetallic catalysts for selective hydrogenation of phenylacetylene to styrene.
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高影响因子
AICHE JOURNAL
·
2021
·Vol. 67
·期 10
·e17368
·
IF 3.993
Yu-Xia Li,Meng-Meng Jin,Shu Shi,Shi-Chao Qi,Xiao-Qin Liu,Lin-Bing Sun
Cu + -containing materials have great potentials in various applications like adsorptive desulfurization. Nevertheless, their applications are severely obstructed by poor stability of Cu + in air. Here, we first clarify the mechanism of Cu + oxidation by first-principle calculations and demonstrate that moisture accelerates Cu + oxidation dramatically. Then, the microenvironment of Cu 2 O-modified HKUST-1, a typical metal-organic framework, is adjusted from hydrophilic to hydrophobic with polydimethylsiloxane coating (producing Cu 2 O@HK@P). This isolates moisture from pores and enhances the stability of Cu + significantly even under oxygen atmosphere. Cu + in Cu 2 O@HK@P preserves well after exposed to air for 6 months, while Cu 2 O@HK lose almost all Cu + for 2 weeks. The optimal Cu 2 O@HK@P can remove 540 μmol g −1 of thiophene from hydrous fuel, which is much superior to Cu 2 O@HK (227 μmol g −1 ) and most reported adsorbents. Our strategy can also be applied to stabilize Cu + in various materials including zeolite, mesoporous silica, and activated carbon.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 4
·1752-1758
·
IF 2.047
Tian Wenjing,Ding Xu,Jiang Feifei,Du Xinrui,Shi Jipeng,Zhang Ji
Research into metal nanoparticles has increased, and they have been increasingly used in non-enzymatic sensor applications. However, there have been few reports on the use of natural products to prepare non-precious metal nanoparticles in an eco-friendly (green) manner. Studies were conducted on Cu nanoparticles (Cu NPs) prepared by the use of natural gallic acid (GA). This method is environmentally friendly and can be applied to H 2 O 2 detection. As-obtained Cu NPs were characterized by x-ray photoelectron spectroscopy (XPS), powder x-ray diffraction (XRD), and transmission electron microscopy (TEM). When applied to H 2 O 2 detection, Cu NPs had good sensitivity, stability, and anti-interference properties. Its electrochemical performance is no less than that of precious metal nanomaterials. Cu NPs mainly exhibit good sensitivity, reaching 5.74 μA mM -1 cm -2 ; the concentration range thereof is 1–20 mM. The process of constructing nanoparticles in this work used natural products, making it environmentally friendly and proving the practicality of constructing non-precious metal nanoparticles and the feasibility of their application to H 2 O 2 detection. Graphic Abstract
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高影响因子
Small
·
2019
·Vol. 15
·期 28
·1901606
·
IF 10.856
Ming-Yu Li,Muni Yu,Dong Su,Jianbing Zhang,Shenglin Jiang,Jiang Wu,Qingping Wang,Sisi Liu
Strong near-surface electromagnetic field formed by collective oscillation of electrons on Cu nanostructure a shows a strong dependence on geometry, offering a promising approach to boost the light absorption of ZnO photoactive layers with enhanced plasmon scattering. Here, a facile way to fabricate UV photodetectors with tunable configuration of the self-assembled Cu nanostructures on ZnO thin films is reported. The incident lights are effectively confined in ZnO photoactive layers with the existence of the uplayer Cu nanostructures, and the interdiffusion of Cu atoms during fabrication of the Cu nanostructures can improve the carrier transfer in ZnO thin films. The optical properties of the hybrid architectures are successfully tailored over a control of the geometric evolution of the Cu nanostructures, resulting in significantly enhanced photocurrent and responsivity of 2.26 mA and 234 A W −1 under a UV light illumination of 0.62 mW cm −2 at 10 V, respectively. The photodetectors also exhibit excellent reproducibility, stability, and UV–visible rejection ratio ( R 370 nm / R 500 nm ) of ≈370, offering an approach of high-performance UV photodetectors for practical applications.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhikang Xu,Mingbin Gao,Xing Wu,Haibo Zhu
Pt-Cu bimetallic particles have been regarded as promising catalysts for propane dehydrogenation. The dispersion of Pt and Cu species on conventional supports always results in the formation of large Pt-Cu particles, and it is highly desirable to fabricate ultra-small Pt-Cu cluster catalysts for propane dehydrogenation. Herein, we used the isolated Cu species in the Cu-SSZ-13 to localize the Pt species and the alloying of Pt with Cu leads to a formation of ultra-small (<1 nm) Pt-Cu bimetallic clusters in the structure of SSZ-13. The structure of synthesized PtCu-SSZ-13 catalysts was studied by XRD, SEM, STEM, XPS, CO-FTIR, H 2 -TPR and EXAFS techniques, which demonstrates that Pt-Cu clusters are entrapped in the micropore of SSZ-13 and their migration can be greatly inhibited. The synthesized PtCu-SSZ-13 catalyst shows high activity and good regeneration in propane dehydrogenation. The optimized catalyst 0.3 %PtCu-SSZ-13 delivers propane conversion of 28.5 % (close to equilibrium conversion) with 100 % propane as feed under WHSV of 7.1 h −1 at 520°C, and its catalytic performance can be completely regenerated via calcination in air. Density functional theory (DFT) calculations indicate that the unique Pt-Cu bimetallic nanocluster structure reduces the energy potential for propane dehydrogenation as well as promotes the adsorption of C 3 H 8 and desorption of C 3 H 6 thus enhancing the activity of the PtCu-SSZ-13 catalyst.
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Mengqiao Li,Liang Chen,Jing Sui,Geoffrey I.N. Waterhouse,Zhiming Zhang,Liangmin Yu
The rapid growth of the dyeing and printing industry has resulted in severe water pollution, posing significant threats to human health and ecosystems. To effectively tackle this challenge, this study presents a novel approach using marine biomass-derived carbon (kelp) combined with Prussian blue (FeCu-PBA) to synthesize carbon-based nanoclusters (Cu-Fe 3 C@KC) for efficient microwave-assisted degradation of high-concentration dyes. By optimizing the FeCu-PBA-to-kelp mass ratio (FeCu/KC), we tailored the material’s morphology and enhanced its microwave absorption properties, achieving rapid and effective dye degradation. Experimental results demonstrate that Cu-Fe 3 C@KC-3 degraded methyl orange, methylene blue, crystal violet, and rhodamine B with efficiencies of 99.37 %, 96.23 %, 94.67 %, and 99.77 %, respectively, within just 4 min. Mechanistic studies, including free radical capture experiments and electron paramagnetic resonance (EPR) analysis, revealed that superoxide radicals ( O 2 − ), holes (h + ), electrons (e − ), and hydroxyl radicals ( OH) were the primary reactive species in the degradation process, with OH playing a dominant role due to its strong oxidative capacity. This research highlights the dual advantages of Cu-Fe 3 C@KC-3: superior catalytic performance and cost-effectiveness. The innovative use of kelp as a precursor provides a sustainable and economical pathway for the large-scale treatment of dye-laden wastewater, addressing critical environmental challenges with significant practical implications.
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产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 3
·1658-1664
·
IF 4.6
Xiuping Li,Jiaqi Wang,Bolin Yin,Kaihong Liu,Jingjing Zhao,Bo Jiang,Hexing Li
The hydrogenation of carbon dioxide into profitable chemicals is a viable path toward achieving the objective of carbon neutrality. However, the typical approach for hydrogenation of CO2 heavily relies on thermally driven catalysis at high temperatures, which is not aligned with the goals of carbon neutrality. Thus, there is a critical need to explore new catalytic methods for the high-efficiency conversion of CO2. Herein, we present a new class of catalysts, featuring phosphorus-doped amorphous ruthenium nanoparticles supported on copper nanoparticles, which capitalizes on the plasmonic effects of copper to achieve the photothermal transformation of CO2 to CO within a gas–solid flow system. Our findings indicated that the reaction efficiency in the presence of photothermal energy was over eight times greater than that with thermal energy alone. The catalyst system exhibited nearly 100% selectivity towards CO under mild conditions, with an impressive CO yield of 123.16 mmol g−1 h−1. This study highlights the significant potential of amorphous metal phosphides in photocatalytic CO2 hydrogenation under mild conditions and offers a fresh avenue for the robust catalysis of amorphous materials.
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PubMed
高影响因子
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