JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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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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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiaoxia Zhang,Zhipeng Zhou,Junjie Liao,Liping Chang,Jiancheng Wang,Weiren Bao
The ultra-deep removal of thiophene from coke oven gas (COG) is critical for the conversion of COG to methane. Currently, Cu/ZnO/Al 2 O 3 is considered as a promising sorbent for thiophene removal; however, its desulfurization performance is currently unable to meet the requirements for industrial applications. Here, a zirconium modification strategy is proposed to overcome this problem, allowing zirconium loaded copper-based sorbents (Cu/ZnO/Al 2 O 3 /ZrO 2 ) with significantly improved thiophene removal performance and high activity to be obtained. Characterization results showed that zirconium improved both the dispersion of copper and the concentration of Lewis acid sites on the sorbent surface. A ZrO 2 concentration of 2 % resulted in stronger Cu-Zn interaction, and the dispersion of Cu on the surface of the sorbent reached its maximum value (49.20 %). Additionally, the Lewis acid strength was also maximized, which greatly improved the desulfurization activity and resulted in a breakthrough adsorption capacity of thiophene (Q b-thiophene ) of 36.24 mg/g, which was about 17 % higher than that of the unmodified Cu/ZnO/Al 2 O 3 sorbent. These results demonstrate that the sulfur capacity of the sorbent can be increased by increasing the number of acidic sites on its surface, paving the way for ultra-deep thiophene removal in industrial applications.
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ACS Applied Nano Materials
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2024
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IF 5.3
Chaofan Ma,Qun Yang,Huiyu Su,Huimin Yang,Xiaoxia Wang,Dawen Zeng
P-type semiconductors [copper oxide (CuO) and cuprous oxide (Cu2O)] have been widely researched as good gas sensing materials due to their unique oxygen adsorption properties. In this work, C-doped CuO/Cu2O hollow nano-octahedrons have been prepared by thermal decomposition of the Cu-based metal–organic framework ([Cu3(BTC)2]n). The CuO and Cu2O nanoparticles form nano-octahedron heterojunctions by a close packing mode. A large number of active heterojunction sites were exposed, which significantly increased the adsorbed oxygen (O2–) content. Meanwhile, doping C in the lattice of the heterojunction effectively reduces the band gap of CuO/Cu2O and promotes the chemical reaction of the target gas on the surface of the material. Density functional theory calculations indicate that the CuO/Cu2O heterojunction has strong adsorption ability for NO2. Electrochemical impedance spectroscopy further reveals that C-doped CuO/Cu2O hollow nano-octahedrons-40 min heterojunction has the best electron transport performance. The sensors have good gas sensing response (22.88–50 ppm) and selectivity to nitrogen dioxide (NO2) at room temperature (28 °C). In addition, the sensor has extremely low detection, which can detect parts per billion level NO2 (20.50% to 100 ppb). It is expected to provide a reference for the development of a room-temperature NO2 sensor.
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ACS Applied Energy Materials
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2024
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IF 5.4
Zhijia Xiao,Jinlong Wang,Xinyi Ke,Zihan Lu,Zhe Zhao,Yongfeng Mei,Gaoshan Huang
The incorporation of metal–organic frameworks onto conductive substrates demonstrates considerable potential in applications related to the hydrogen evolution reaction. In this work, we present a streamlined synthesis approach involving atomic layer deposition pretreatment to facilitate the controlled growth of Cu-BDC particles on a conductive Nafion film. This methodology preserves a substantial loading of Cu-BDC with a hierarchically porous structure, accompanied by a notable surface area of 547 m2 g–1. The composite is subsequently utilized as an electrocatalyst for hydrogen generation in an alkane electrolyte. The structural advances in the composite result in a superior electrochemical hydrogen production efficiency with a low overpotential of 84 mV and a low Tafel slope of 58 mV dec–1 in 1.0 M NaOH. Notably, the composite showed good cycling performance during the 18 h test with 2000 cycles. This research introduces a design of a catalyst electrode with promising implications for the hydrogen production industry.
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ELECTROCHIMICA ACTA
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2025
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IF 5.6
Xue Bai,Liyin Bu,Yongqiang Du,Quan Wang
Owing to the internal correction function and good resistance to complex factors, dual-signal electrochemical sensors have abilities to avoid false positives. In this work, Cu-MOF and MnCO 3 were combined and further prepared the Cu 2+ and Hg 2+ dual-signal electrochemical sensor for ultra-sensitive detection of Hg 2+ . Notably, beyond the commonness of the general MOFs, Cu-MOF could undergo oxidation–reduction to provide an internal reference signal. MnCO 3 , a porous structure with good electrocatalysis, exhibits an obvious signal amplification effect on the detection of Hg 2+ . Differential pulse voltammetry was applied for the detection of Hg 2+ . The current signal of Cu 2+ and Hg 2+ reduced regularly with Hg 2+ concentration decreased. Under optimized conditions, the LOD of Hg 2+ was calculated around 6.82 nM with a linear range of 0.10 ∼ 2.50 μM. The proposed sensor was proven to show satisfactory anti-interference, stability, and reliability, which is promising for the ultra-sensitive detection of Hg 2+ in real life.
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Advanced Energy Materials
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2024
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IF 24.4
Rongrong Deng,Qibo Zhang
The development of advanced electrocatalysts with exceptional performance at high current densities is pivotal for reducing electric energy consumption in industrial water splitting for hydrogen production. Herein, a flexible one-step electrodeposition approach is developed to synthesize superhydrophilic 3D flower-like clusters of Cu–Co–P nanosheets grown in situ on nickel foam (NF). Introducing Cu into Co–P causes strong electron interactions, forming an electronic configuration favorable for the adsorption and desorption of intermediates, which significantly improves the intrinsic catalytic activity. The as-deposited Cu–Co–P/NF display notable bifunctional catalytic activity with low overpotentials of 259 and 65 mV for the oxygen and hydrogen evolution reactions, respectively, at 10 mA cm −2 . Superwetting 3D flower-like nanostructures are conducive to the penetration of electrolytes and the rapid release of bubbles, enabling the efficient utilization of active sites and the timely release of bubble stress under high current densities. An assembled Cu–Co–P/NF(+, −) electrolyzer achieves an impressive voltage of 1.85 V at 500 mA cm −2 for water splitting and appreciable stability for over 220 h under simulated industrial conditions. This work offers an attractive strategy for regulating superaerophobic Co–P electrocatalysts for industrial water splitting, which can contribute to practical applications.
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FOOD CHEMISTRY
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2024
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IF 8.5
Yongzhen Dong,Junpeng Zhao,Long Wu,Yiping Chen
Magnetic relaxation switching (MRS) biosensors have been recognized as useful analytical tools for a range of targets; however, traditional MRS biosensors are limited by the “prozone effect”, resulting in a narrow linear range and low sensitivity. Herein, we proposed a paramagnetic Cu 2+ -induced magnetic resonance tuning (MRET) strategy, based on which Cu 2+ ions and magnetic nanoparticles (MNPs) were adopted to construct a Cu–MNP-mediated MRS (Cu–M-MRS) immunosensor with Cu 2+ ions acting as a quencher and MNPs as an enhancer. An Fe 3 O 4 @polydopamine-secondary antibody conjugate was prepared and used to correlate the amount of Cu 2+ ions to the target concentration through an immunoassay. Based on the immunoreaction, the Cu–M-MRS immunosensor enabled the sensitive detection of chlorpyrifos (0.05 ng/mL, a 77-fold enhancement in sensitivity compared with the traditional MRS immunosensor) and Salmonella (50 CFU/mL). The proposed MRET strategy effectively improved the sensitivity and accuracy of the MRS immunosensor, offering a promising and versatile platform for food safety detection.
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Food Packaging and Shelf Life
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2024
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IF 8.5
Nannan Li,Hai Qin,Qun Tang,Daijiang Peng,Xiaoyan Luo,Heping Li,Zhiming Zou
In the realm of food safety, innovative intelligent packaging material that can provide the capacity for timely and effectively monitoring the food freshness are essential. In this work, ammonia-sensitive Cu-based metal organic framework (Cu-LTE) nanocrystal was manufactured and characterized, and then explored as a functional compatibilizer of carboxymethyl starch/polyvinyl alcohol (CMS/PVA) blend to develop novel intelligent packaging film materials . The results demonstrated that the introduction of Cu-LTE nanocrystal into CMS/PVA blend brought about significant promotions regarding to the compatibility, mechanical strength (48.1 MPa), UV-protection (with UV transmittance of only 1.6 %), and moisture/oxygen barrier effectiveness, while preserving long-term colour stability of the blend film. Moreover, the developed CMS/PVA/Cu-LTE blend film featured remarkable antibacterial capacity (over 99.0 %) toward both E. coli and S. aureus bacteria, as well as outstanding colour change ability under ammonia environment. The developed CMS/PVA/Cu-LTE blend film also presented visually identifiable colour change during the monitoring of shrimp deterioration. These findings indicated that the developed CMS/PVA/Cu-LTE blend film should hold tremendous potential as an intelligent active packaging material.
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MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Jiale Zhang,Xiaohu Qu,Jianhang Yin,Ning Wang
With the development of advanced electronic packaging, a big challenge for the chemical mechanical polishing (CMP) is to achieve the global planarization of EMC (epoxy molding compound)- Si -Cu materials with the normal ceramic abrasives. In this paper, the SiO 2 @CeO 2 core-shell composite abrasive is developed for the CMP of EMC/Si/Cu materials for the first time, and a global planarization with low removal selectivity is expected owing to the synergistic effect of the core-shell abrasives. Two sol-gel synthetic strategies, i.e., oil bath and ultrasonication, are proposed for the controllable synthesis of the SiO 2 @CeO 2 abrasives, which exhibit a good dispersive stability with a large absolute zeta potential >30 mV. The slurry for the CMP of EMC-Si-Cu based on the SiO 2 @CeO 2 abrasives shows the advantage in controlling the surface roughness, material removal rate and the removal selectivity. Especially, the ultrasonic SiO 2 @CeO 2 abrasives give rise to the low surface roughness (Cu 2 nm, Si 0.3 nm, EMC 10 nm) and the low removal selectivity (Cu/EMC/Si = 1.58:1.56:1.00). Therefore, the proposed SiO 2 @CeO 2 core-shell abrasives and the developed CMP slurry opens an alternative way for the planarization of EMC/Si/Cu materials in the advanced electronic packaging.
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TRIBOLOGY INTERNATIONAL
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2024
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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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Journal of Materials Chemistry C
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2024
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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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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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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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