JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xiaorui Wang,Hao Li,Wenhui Fu,Qiushi Chen,Xuzhong Gong,Zhi Wang,Junhao Liu
Binders provide a straightforward and efficient strategy to mitigate the significant challenge of volume expansion in silicon anodes for lithium-ion batteries. To improve the cycle life of silicon anodes, a cross-linked binder carboxymethyl cellulose–phytic acid–pyrrole (CMC-DP) is designed and synthesized using carboxymethyl cellulose, phytic acid, and pyrrole. The numerous hydroxyl groups in phytic acid provide abundant binding sites for the formation of hydrogen and ester bonds. The formation of hydrogen bonds and covalent bonds enhances the mechanical properties of the adhesive. The amino groups in the binder form N Si O covalent bonds with silicon particles, while the hydroxyl and carboxyl groups form (COO) 2 Cu and (OH) 2 Cu coordination bonds with the copper foil, enhancing interfacial adhesion. When the CMC-DP10 (10 µL pyrrole) binder is applied to silicon nanoparticles (∼30 nm), the specific capacity of the electrode can be maintained at around 1700 mAh/g after 500, whereas the CMC binder achieves only ∼100 mAh/g under the same conditions. This work demonstrates that the CMC-DP binder exhibits strong adhesion to both silicon nanoparticles and copper foil.
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PubMed
高影响因子
Polymer Chemistry
·
2017
·Vol. 8
·期 24
·3679-3688
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IF 5.375
Donghao Wang,Shutong Guo,Qiang Zhang,Paul Wilson,David M. Haddleton
In this study, we report on the synthesis of thermoresponsive polymers with different microstructures, a precisely tunable lower critical solution temperature (LCST) and terminal catechol anchors by copper(0) mediated living radical polymerization (Cu(0)-LRP). All the Cu(0)-LRP polymerizations were performed directly from the unprotected dopamine-functionalized initiators at ambient temperature or below in aqueous solution with full or close to full conversion obtained in minutes. The resulting polymers exhibited a designed molecular weight (MW), narrow MW distribution and high end-group fidelity capable of in situ block copolymerization. We demonstrate their application toward the surface modification of titanium dioxide nanoparticles by the successful preparation of smart nanocomposites with a self-flocculation effect. A “one-pot” strategy was then developed for the simultaneous polymerization and surface modification to simplify the multi-step purification and immobilization processes. The subsequent degradation of Rhodamine B under the irradiation of simulated solar light proved the potential application of hybrid nanocomposites in water treatment and a switching effect of photocatalytic ability below or above the LCST was also observed.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pan Guo,Weili Gu,Junyu Lu,Keying Zhang,Fei Liu,Hongzhi Liu,Nan Sheng,Chunyu Zhu
The deployment of phase change materials (PCMs) presents a viable strategy for enhancing solar energy conversion and storage, providing a continuous thermal energy generation process in line with carbon neutrality objectives. Through the modification of carbon felts (CF) with polydopamine (PDA) and subsequent controlled integration of Cu nanoparticles, this study achieved the development of flexible phase change composites (FPCCs) for enhanced solar thermal energy conversion and storage, incorporating thermally-driven shape memory and spatial adaptability. Notably, the CF/PDA/Cu/PW variant demonstrated a thermal conductivity of 1.43 W m −1 K −1 , marking a 680 % enhancement relative to pure paraffin wax (PW), with an energy storage density of 171.3 J/g. Moreover, these composites exhibited rapid responsiveness, near-complete thermal shape recovery, and maintained stable solar-to-thermal conversion efficiency and shape stability. These findings suggest the potential of these FPCCs for utilization in solar thermal energy systems, as well as in thermal management under spatial and shape constraints.
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Nanoscale
·
2024
·Vol. 16
·期 6
·3034-3042
·
IF 5.8
Haoyang Wu,Zhili Wang,Benqiang Tian,Yaping Li,Zheng Chang,Yun Kuang,Xiaoming Sun
Electrocatalytic CO2 reduction (ECR) to high value-added chemicals is an excellent method to attenuate the impact of greenhouse effect caused by CO2. At the same time, multicarbon products (C2+) get extensive attention in view of their relatively high energy density and market price. At present, Cu is an important metal electrocatalyst to convert CO2 into multicarbon products (e.g. ethylene, ethanol, and n-propanol); however, its poor selectivity impedes its practical application. It is well-known that the Cu(100) crystal facet can enhance the selectivity toward multicarbon products among different Cu crystal facets. Herein, the Cu nanoparticles were firstly prepared using the inductive effect of different gases (CO2, CO, Ar, N2, and air) during the Cu electrodeposition processes, in which the CO2-induced Cu catalyst (Cu-CO2) showed the largest normalized content of the Cu(100) crystal facet and the highest C2+ faradaic efficiency of 69% at a current density of 80 mA cm−2 in ECR. Subsequently, the different CO2 pressures during the Cu electrodepositions were studied to reveal the optimal CO2 pressure in the CO2-induced Cu synthesis for improved Cu(100) content as well as C2+ faradaic efficiency. Finally, density functional theory (DFT) calculations confirmed that CO2 molecules preferred to get adsorbed on the Cu(100) crystal facet, which resulted in not only the presence of dominant Cu(100) during the CO2-induced Cu synthesis but also the good electrocatalytic performance in ECR.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wenhao Gu,Jinxian Feng,Xingshuai Lv,Weng Fai Ip,Hui Pan
Photocatalytic CO 2 reduction has been considered as an efficient way for the carbon nuetrality. In this work, a series of (Cu, Mn) co-incorporated metal-orgnaic frameworks (MOFs) (NH 2 -MIL-125(Ti) (NML)) with different Cu 2+ /Ti 4+ and Mn 2+ /Ti 4+ molar ratios are systematically investigated to improve the efficiency for photocatalytic CO 2 reduction. The optimized sample (1 M−5C−−NML) shows a highest yield of HCOOH (116.74 μmol . g −1. h −1 ) (3.71 times higher than that of NML), and a superior apparent quantum efficiency (AQE) (6.74 % at 405 nm). The improved performance is attributed to the formed oxygen vacancy and intermediate energy level as introduced by the co-incorporation, which facilitate the charge separation and enhance the visible-light-harvesting of NML. It shows that the density of oxygen vacancies increases with the increasing amount of Cu, resulting in enhanced charge separation. However, the increasing amount of Mn leads to the short-range Mn-Mn interaction, the concentration quenching effect as well as the inhibited photocatalytic performance. This work shows that the co-incorporated MOFs can be used as an advanced photocatalyst.
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LUMINESCENCE
·
2024
·Vol. 39
·期 10
·e4916
·
IF 3.2
Chen Wang,Wenheng Li,Xiaohong Wang,Dongshan Xiang,Kun Zhai
In this paper, a highly sensitive method for sulfur ion (S 2− ) detection was developed based on a four-color fluorescence probe constructed from copper-containing metal–organic framework (CuBDC) and four dye-labeled single-strand DNA (ssDNA). In the absence of S 2− , dye-labeled ssDNA can be adsorbed on the surface of CuBDC, and the dyes are close to copper ion on the CuBDC surface, their fluorescence is quenched by copper ion, and their fluorescence signals are weak. In the presence of S 2− in the system, S 2− reacts with copper ion in CuBDC to form CuS, which has a more stable structure than complex CuBDC, resulting in the decomposition of CuBDC. In this case, dye-labeled ssDNA are detached from the CuBDC surface and dissolved in the solution, and the fluorescence of the dyes is restored. Under the optimized conditions, there is a good linear relationship between the total fluorescence intensity of four dyes and the concentration of S 2− in the range of 2 × 10 −9 to 5 × 10 −8 mol/L; the detection limit is 2.2 × 10 −10 mol/L. The method has a good selectivity and accuracy, and it can be applied to the analysis and detection of S 2− in actual water samples.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuangfu Gang,Yongxin Qian,Tianshun Xiong,You Li,Wang Li,Zheng Ma,Wenguang Zhang,Hui Long,Yingchao Wei,Xin Li,Qinghui Jiang,Yubo Luo,Junyou Yang
All-scale hierarchical defects induced by structural designing from unit cell to mesoscale play a significant role in oscillating and dissipating electromagnetic wave energy under external microwave radiation. To construct such all-scale hierarchical defects, hereby, high-entropy alloy nanoparticles coated by microscale carbon (HEA@C) with a core–shell structure were obtained by carbonizing Ni-Mn-Co-Cu-Al metal–organic. Thus, all-scale hierarchical defects were gained, including lattice distortion and nanotwins caused by the high entropy effect, vacancy and topological defects within carbon, and the heterojunction between high entropy nanoparticles and carbon. These all-scale hierarchical defects combined with the magnetic and conductive nature of HEA@C enable us to achieve a high electromagnetic wave absorption performance, with a reflection loss (RL min ) value of −52.36 dB and an effective absorption bandwidth (EAB) of 5.01 GHz. It implies that HEA@C should be an effective electromagnetic wave (EMW) absorber.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Qinglin Chen,Long Tian,Ming Ruan,Yi Liu,Cheng Peng,Weigang Cui,Wei Liang,Shaoyun Shan,Tianding Hu
Fenton-like reactions with Fe-based metal–organic framework (MOF) catalysts have been extensively explored in the field of environmental remediation. However, easy precipitation of Fe2+/Fe3+ and the production of sludge under basic conditions caused catalyst loss and greatly limited their large-scale application in industry. The development of an Fe-free Fenton-like reaction is of extreme importance and remains in its infant stage. Herein, a series of Fe-free dual MOF nanoparticles (HKUST-1/ZIF-67-X) were fabricated by in situ coating of ZIF-67 on HKUST-1 and were systematically analyzed by various characterization techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), and N2 adsorption–desorption isotherms. Subsequently, these materials were applied in catalyzing methylene blue (MB) degradation. The effects of several operation parameters, i.e., pH, H2O2 dosage, catalyst dosage, and reaction temperature, on MB degradation were investigated. It was unveiled that HKUST-1/ZIF-67-7% exhibited an outstanding catalytic activity without the production of any sludge, which could reach as high as 93.29% MB degradation efficiency within 40 min. This was attributed to the unique core–satellite histoarchitecture of HKUST-1/ZIF-67-7% and the synergistic effect between HKUST-1 and ZIF-67. The HKUST-1/ZIF-67-7% composite still achieved up to 80.17% MB degradation efficiency at the fifth catalysis cycle. Importantly, HKUST-1/ZIF-67-7% exhibited significant catalytic efficiency under a wide pH range (4.2–10.1) and top catalytic efficiency at the near neutral pH value. The low cost, environment benignancy, satisfactory degradation efficiency, wide pH application range, and excellent reusability emphasize its great application potential in Fenton-like degradation of pollutants. This contribution could provide a paradigm investigation for designing non-iron-based MOF catalysts to solve the increasingly pressing pollution issues.
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高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Bowen Shi,Zirui Yin,Xiaodan Tang,Hongmei Yu,Shuanping Cui,Wei Chen
A dual-emission ratio fluorescence probe (NL-CDs/Cu–Cy–I) was fabricated via an electrostatic self-assembly method. NL-CDs served as the reference signal (Em = 433 nm), remaining insensitive to amoxicillin, while Cu–Cy–I acted as the response signal (Em = 601 nm), exhibiting varying degrees of fluorescence quenching with amoxicillin concentration changes. This established a fluorescence sensing platform leveraging internal filtration and static quenching synergistically, ensuring high specificity. Compared to the single-signal Cu–Cy–I fluorescence probe, the detection range expanded from 0.5–15 μmol L−1 to 0.2–30 μmol L−1, with the detection limit decreasing from 0.12 μmol L−1 to 0.073 μmol L−1, demonstrating significant enhancements in both range and limit. The developed ratiometric fluorescent probe was effectively employed for amoxicillin monitoring in environmental water samples, urine samples, and amoxicillin capsules, achieving recovery rates of 96.5–102.9%. This underscores the accuracy and practical applicability of the NL-CDs/Cu–Cy–I ratio fluorescence probe-based fluorescence analysis method for amoxicillin detection.
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TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Xingtao Cheng,Yi He,Siming Yan,Liping Yan,Zhiyuan Li,Shijun Xu,Kaijun Wei,Yi Fan,Quangang Chen,Wanwan Peng
Wear and erosion are common issues encountered when applying metal components in harsh marine environments. In this study, N-MX@ZnO materials were prepared by a synergistic modification of Ti 3 C 2 T x using ethylenediamine and zinc oxide quantum dots. Subsequently, the Ni-Cu/N-MX@ZnO coating was deposited onto J55 steel using pulsed electrodeposition, exhibiting excellent tribological properties. The toughness, wear, and seawater erosion behavior of the coatings were investigated. The results demonstrated that the COF value of the Ni-Cu/N-MX@ZnO coating was reduced by 48.23% and the impedance value was increased by 300% in comparison to the pure sample. The enhancement mechanism can be attributed to the physical barrier effect and uniform dispersion effect of N-MX@ZnO, which caused the Ni-Cu/N-MX@ZnO coatings to form a friction-transferring film during the friction process.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ting Li,Xianfa Zhang,Xiaoli Cheng,Yingming Xu,Shan Gao,Lihua Huo
It is necessary to achieve highly sensitive and low temperature detection of Cl 2 for the protection of the environment and human life and health. How to achieve sensitive detection of Cl 2 at low temperature remains a challenge. The construction of heterojunction is beneficial for promoting carrier transfer, increasing active sites, thus effectively improving sensing performance of materials. In this study, the flower sphere-like Cu 2 O/CuO composite with p-p heterojunction was obtained by using Cu-CPs as precursor followed with sintering treatment. The Cu 2 O/CuO sensor exhibits high response (S=405) to 10 ppm Cl 2 at low temperature (50 °C), the response/recovery time is 50 s/2420 s. At the same time, the Cu 2 O/CuO sensor has a low detection limit (50 ppb) and good long-term stability (60 days). The characterization results, e.g. electron paramagnetic resonance (EPR), O 2 /Cl 2 -temperature programmed desorption ( O 2 /Cl 2 -TPD), X-ray photoelectron spectroscopy (XPS) etc., reveal that oxygen vacancy effectively promotes the increase of surface adsorbed oxygen, the formation of p-p heterojunction not only modulates the electronic properties of Cu 2 O/CuO but also provides abundant adsorption sites for gas. The synergistic effect of the above factors makes Cu 2 O/CuO composite exhibit satisfactory Cl 2 sensing performance.
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高影响因子
FUEL
·
2024
·
IF 6.7
Baozhu Chen,Zefeng Zheng,Changsong Hu,Ziyu Zengcai,Zhonghai Liu,Minglei Lu,Qingwei Meng,Tiejun Wang
The development of a highly efficient non-noble catalyst for rapid releasing of hydrogen from methanol/water at low temperature is urgent, but challenge. In this paper, the high content of graphited N-doped carbon encapsulated reducing state copper catalyst was fabricated for low-temperature aqueous reforming of methanol. The Cu@NGC-600 catalyst gives excellent hydrogen production rate of 46.15 μmol·g cat -1 ·s -1 at 190 °C, which is 4 times higher than the commercial 20 % Pt/C catalyst and 3 times higher than other reported Cu-based catalysts (such as the Cu@NC-200 catalyst). Characterization and DFT calculation results revealed that rich doping of graphite N and the synergistic effect of Cu–N strengthened the electron transfer between copper and the NC matrix, decrease the reduction temperature of catalyst, which enabled the Cu to maintain a highly reduced state of Cu 0 /Cu + during APRM for low temperature (150–190 °C) hydrogen production.
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