COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xiaojiao Kang,Tianyu Gao,Wei Lü,Ming Jiang,Hongbo Zhu,Hongcheng Wang
Ternary I-III-VI quantum dots (QDs) are promising substitutions to Pb and Cd chalcogenide QDs in various applications such as LED, biodetection and sensing. It is urgent to explore near-infrared (NIR) emitting QDs with the advantages of low-cost synthesis and nontoxicity. Herein, water-soluble NIR Cu-In-S/ZnS (CIS/ZnS) QDs were obtained utilizing thioglycolic acid (TGA) and polyethyleneimine (PEI) as the stabilizing molecules in a commercial pressure cooker. Moreover, we detailedly investigated the influence factors on the PL property of CIS QDs and CIS/ZnS QDs including species of sulfur source, reaction time, pH, the dosage of TGA, PEI, Na 2 S, number of ZnS coating layers and the molar ratio of Cu/In. These QDs with adjusting Cu/In ratios show the emission maximum in the range of 710–750 nm. The maximum PL quantum yield (PLQY) of 20 % was acquired for CIS/ZnS QDs with a Cu/In ratio was 0.33/1 and three ZnS layer coating. Finally, we fabricated a NIR pc-LED lamp by using blue LED chips and CIS/ZnS QDs. The device shows a broadband NIR emission centered at 770 nm, which can be applied in night-vision system.
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CHINESE JOURNAL OF CATALYSIS
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2025
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IF 17.7
Bo Feng,Danning Feng,Yan Pei,Baoning Zong,Minghua Qiao,Wei Li
The photocatalytic oxidation of methane to methanol using molecule oxygen directly is an attractive catalytic reaction, but designing catalysts to avoid over-oxidation remains a significant challenge. Herein, Cu single-atom anchored on the defective carbon nitride structure (Cu SA/Def-CN) is designed for selective photocatalytic oxidation of methane into methanol using O 2 under mild conditions. The Cu SA/Def-CN catalyst exhibits a high methanol selectivity of 92.8% under optimized conditions. Mechanistic studies reveal a synergistic effect between Def-CN and Cu SA, where Def-CN is responsible for the in-situ generation of hydrogen peroxide, which is subsequently decomposed by the Cu SA sites to produce ·OH radicals that play a key role in the rate-determining step of methane activation to form methanol. Additionally, the presence of Cu SA not only enhances the electron-hole separation efficiency and improves the transfer of the photo-generated charges, but also increases the number of active sites for methane adsorption and activation. These insights provide valuable guidance for designing efficient catalysts for the highly selective photocatalytic oxidation of methane to methanol.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Ziyang Xu,Liang Chen,Zeyu Liu,Jiaying Xing,Edward J. Anthony,Chunbo Wang
Methanol synthesis from CO 2 hydrogenation is a promising route for carbon–neutral fuel production, but conventional Cu-based catalysts suffer from poor activity at low pressure. Herein, we report a cost-effective and scalable dual-site Ni n /Cu 1 -A catalyst, designed by integrating Ni nanoparticles (NPs) with Cu single atoms (SAs), for CO 2 hydrogenation to methanol at ambient pressure. The obtained Ni n /Cu 1 -A catalyst achieves a remarkable methanol STY of 665.7 μmol g cat -1 h −1 at 240 °C and 0.1 MPa, significantly outperforming both monometallic Cu 1 -A (199.7 μmol g cat -1 h −1 ) and Ni n -A (38.4 μmol g cat -1 h −1 ) catalysts. Further investigations reveal that Ni NPs facilitate hydrogen activation and spillover, while Cu SAs serve as the primary active sites for CO 2 reduction to methanol, effectively promoting the formate-mediated reaction pathway. This synergistic interaction leads to a substantial enhancement in CO 2 -to-methanol conversion. This work develops an efficient catalyst for CO 2 hydrogenation under mild conditions and provides a promising strategy for distributed green methanol synthesis in small-scale systems, enabling sustainable CO 2 utilization through renewable energy integration.
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ACS Omega
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2025
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IF 4.3
Chaofan Deng,Chun Cai
Pd–Cu bimetallic catalysts were successfully synthesized for the dehydrogenation of Bisphenol Z (BPZ) by an impregnation-reduction method. The obtained catalyst was studied by XRD, HRTEM, XPS, BET, and NH3-TPD techniques and effectively applied in the highly selective cleavage dehydrogenation of BPZ to give PPP > 99% yield at 270 °C and atmospheric pressure in the solvent-free condition. It was demonstrated that the “synergistic effect” of the bimetallic catalysts could effectively promote the cleavage dehydrogenation reaction. Pd species served as the primary active sites for the adsorption and dissociation of H* and the activation of C–H bonds, while the introduced Cu species accelerated the breaking process of the C–H bond. This catalyst demonstrated remarkable stability and could be reused over ten cycles without obvious decrease both in yield and selectivity. The likely reaction pathway was outlined to elucidate the cleavage dehydrogenation mechanism according to experimental results.
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PubMed
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AICHE JOURNAL
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2025
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IF 4
Fei Fan,Dechao Wang,Zengyi Li,Wulong Lu,Jianwei Liu,Xiaoyi Wei,Xu Cheng,Houxiang Sun,Huabing Zhang,Zhiping Chen,Wenwu Zhou
Developing high-performance supported non-precious metal copper-base catalysts for CO 2 hydrogenation is of extreme significance for the successful production of green methanol (CH 3 OH). Herein, Cu/ n Ge-CeO x catalysts ( n = 0, 0.25, 0.5, and 1 wt%) were synthesized via the incipient wetness impregnation method and comprehensively investigated using experiments and DFT calculations. Among all the catalysts, the Cu/0.5Ge-CeO x catalyst exhibited the highest concentration of oxygen vacancies, the smallest Cu grain size, and the most favorable regions for CO 2 adsorption. Compared to the Cu/0Ge-CeO x catalyst, the CH 3 OH yield was significantly improved over the Cu/0.5Ge-CeO x catalyst in the temperature range of 220–260°C under 3 MPa and a gas hourly space velocity of 3000 mL·g cat −1 ·h −1 . Especially at 260°C, the yield sharply increased from 35.23% to 82.21%, and this catalyst maintained high activity for 100 h. This was because the inert pair effect of the introduced Ge promoters induced lattice distortion on the support surface and regulated its microregion electron structures, while simultaneously establishing a highly active interface on the adjacent Cu cluster. This not only enabled an integrated process of in situ activated CO 2 and hydrogenation, but also inhibited the HCOO pathway, lowered the barrier of the rate-controlling step of the RWGS pathway, and reconciled some of its competing branching routes.
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ACS Applied Nano Materials
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2025
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IF 5.5
Yunjie Ren,Yueyuan Li,Min Qing,Yonghua Yuan,Jing Zhou,Lijuan Bai
Phosphate plays a crucial role in various physiological and pathological processes; however, effective strategies for analyzing diverse phosphates and monitoring phosphate hydrolysis remain limited. Herein, we develop a metal–organic framework wrapped Cu nanoclusters-based (CuNCs@MOF) fluorescent sensor array for high-throughput discrimination of phosphates and real-time monitoring of their enzymatic hydrolysis. Leveraging the confinement effect of zinc-based MOFs, the encapsulated CuNCs exhibited reduced intramolecular vibration and rotation, resulting in enhanced luminescence performance. Due to the distinct affinities of various phosphates toward zinc ions, the sensor array generates differentiated fluorescence responses for seven phosphates, including adenosine triphosphate (ATP), cytidine triphosphate, uridine triphosphate, adenosine diphosphate, adenosine monophosphate, pyrophosphate (PPi), and inorganic phosphate. Subsequently, the fluorescence response signals are processed using the pattern recognition algorithm to generate the unique fingerprint spectra of each phosphate. We demonstrate that the sensor array can not only identify seven distinct phosphates at concentrations as low as 5 μM and effectively distinguish between their mixtures but also exhibit excellent anti-interference capability and enable dynamic monitoring of ATP and PPi hydrolysis. Notably, the sensor array achieved outstanding performance in complex real-world samples and cellular-level analyses, demonstrating 100% accuracy in blind sample identification. Overall, this work develops a strategy for high-throughput discrimination of phosphates and real-time monitoring of their enzymatic hydrolysis.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shanguang Xu,Xin Han,Fan Zhang,Zhengyang Sun,Ruiying Chai,Fei Xu,Shanguo Du,Xiuling Jiao,Dairong Chen,Jie Zhang
The development of efficient catalysts for the selective hydrogenation of furfural (FAL) to furfuryl alcohol (FOL) is of great importance for sustainable chemical production. In this study, a highly efficient Cu/Al 2 O 3 catalyst was developed for the selective hydrogenation of FAL to FOL, achieving 100 % conversion and 100 % selectivity at 85 °C and 1.0 MPa H 2 with the optimal 7Cu/Al 2 O 3 -AIP catalyst, which was tailored by modulating the surface acidity of Al 2 O 3 and the distribution of Cu species. Evaluation of Cu-supported varying Al 2 O 3 catalysts revealed a near-linear correlation between the density of medium-strong acidic sites and catalytic activity, unequivocally demonstrating that medium-strong acidic sites on the alumina surface serve as the active sites for the reaction, which was further corroborated by competitive adsorption experiments involving pyridine and furfural. Furthermore, the density of Cu 0 sites was varied by adjusting the copper loading and conducting N 2 O selective oxidation experiments. Notably, a linear increase in catalytic activity was observed with the Cu 0 /(Cu 0 + Cu + ) ratio on the catalyst surface. Advanced characterization techniques, combined with experimental results, elucidated that the Cu 0 species act as the primary active sites for H 2 activation, while acidic sites are crucial for FAL adsorption, leading to the exceptional catalytic performance by the synergistic catalysis. This study underscores the synergistic effect between Cu 0 species and acidic sites, providing profound mechanistic insights into the FAL hydrogenation process and establishing a strategic foundation for the rational design of highly efficient Cu-based catalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Jie Jiang,Zhenzhen Xue,Yawei Wang,Di Tang,Rongfeng Yuan,Ning Ma,Alaa S. Abd-El-Aziz
12H-NECZ (dodecahydro-N-ethylcarbazole), a promising liquid organic hydrogen carrier (LOHC) with high H 2 capacity, stability, and low dehydrogenation temperature, requires efficient low-cost dehydrogenation catalysts for industrial-scale application. In this work, NiCuAl-LDH-R (hydrotalcite-derived NiCu bimetallic catalyst) with rosette-like two-dimensional structures and highly dispersed NiCu alloys are prepared for the dehydrogenation reaction of 12H-NECZ. The addition of Cu to NiAl-LDH-R can significantly reduce the reaction temperature while achieving rapid dehydrogenation. Among the NiCuAl-LDH-R catalysts, the Ni 7 CuAl-LDH-R exhibited the highest dehydrogenation performance with 100 % dehydrogenation efficiency and 100 % selectivity of NECZ at 180 °C within 4h (12H-NECZ/catalyst mass ratio = 15:1). The electronic and geometric effects of Ni and Cu, excellent dispersion of NiCu alloy, strong metal carrier interaction between NiCu alloy and AlOx, as well as the rich alkalinity synergistically contributes to the catalyst's exceptional dehydrogenation activity. The cost-effective nonprecious catalyst, with tunable morphology/composition and excellent performance, shows great potential for 12H-NECZ dehydrogenation applications.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Junfeng Zheng,Jinyu Liu,Zikang Qin,Yulei Ma,Yahui Yang,Linlin Yang,Hang He,Zhongde Dai,Wenju Jiang,Lin Yang,Lu Yao,Bo Tang
High water flux and dye rejection are crucial for effective textile wastewater treatment. In this study, novel two-dimensional (2D) metal-organic frameworks (MOFs) were synthesized and combined with one-dimensional (1D) halloysite nanotubes (HNTs) and polydopamine (PDA) to fabricate the thin-film nanocomposite (TFN) membranes. The surface morphology, chemical composition, and separation performance of resultant membranes were systematically characterized to illustrate their structure-property-performance relationships. Introducing hydrophilic 1D HNTs enhanced membrane hydrophilicity and bridged large gaps between the 2D MOF nanosheets. Under optimized conditions, the PDA-HNTs/MOFs membrane achieved a water permeance of 362.1 LMH·bar⁻¹ and 99.9 % rejection of Congo Red. PDA acted as a “bridge” linking HNTs and MOFs to the membrane substrate, thereby providing excellent antifouling performance and long-term stability. After 72 h of continuous operation, this membrane maintained a 99.1 % rejection of Congo Red, greatly surpassing both pure MOFs and HNTs/MOFs membranes. These findings highlight the superior filtration capabilities and promising potential of PDA-HNTs/MOFs membranes for dye wastewater treatment.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
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IF 5.8
Wenpeng Hong,Yuhang Li,Haifeng Jiang,Yu Zhang,Wei Jia,Meng Song
Catalytic steam gasification is a promising route for converting plastic waste into valuable gaseous products. This work explores the heterogeneous catalytic gasification behavior of polystyrene (PS) in a two-stage fixed bed system, as well as the promotion mechanism for the generation of gaseous hydrocarbons. The obtained results indicate that adding MnCo 2 O 4 catalyst can effectively promote the formation of gaseous hydrocarbons. Further, the incorporation of Cu strengthens the above reaction process, resulting in a yield of 85.08 mmol/g for the C 1 -C 3 gaseous hydrocarbons. However, the doping of Ni has a negative effect on the generation of gaseous hydrocarbons. Moreover, an increase in the flow rate of steam within the system results in an initial rise followed by a decline in the yield of gaseous hydrocarbons. The optimal steam inflow is determined at 0.14 mL/min. The cycling test results of the catalyst show that the yield of the gaseous components of C 1 -C 3 can still be maintained at about 80 % of the initial state after five cycles. Finally, the synergistic pathway of steam and catalyst in PS gasification is elucidated. These works provide important and valuable guidance for the preparation of high-value gas-phase hydrocarbon products from waste plastics.
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Frontiers in Chemistry
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2025
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IF 4.2
Chen Yang,Yuanyuan Chen,Zhimin He,Rong Li,Xinglong Gou
The electrochemical nitrate reduction reaction (NITRR) offers a sustainable route for ammonia synthesis and environmental remediation but faces challenges such as sluggish kinetics and competing hydrogen evolution. This study aims to address these limitations by designing a Cu/molybdenum phosphide (MoP) heterostructure catalyst through one-pot calcination, which integrates Cu nanoparticles with MoP nanograins. Structural and electronic analyses confirm the formation of intimate Cu–MoP interfaces, where charge redistribution polarizes Cu to an electron-deficient state (Cuδ+) and enriches MoP with electrons. This configuration enhances nitrate adsorption on Cuδ+, while MoP efficiently supplies protons via accelerated water dissociation. The Cu/MoP catalyst achieves a record-high NH3 Faradaic efficiency (FE) of 98.93% and a yield rate of 30.72 mmol h−1 cm−2 at −0.5 V (vs. RHE), outperforming isolated Cu or MoP. When deployed in a Zn-nitrate battery, the composite cathode delivers a peak power density of 12.97 mW cm−2. This work provides a promising solution to the insufficient active hydrogen supply and poor NH3 conversion efficiency of Cu-based nitrate reduction catalysts.
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PubMed
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ELECTROCHIMICA ACTA
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2025
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IF 5.6
Yixin Liu,Wenyu Dong,Tao Wang,Jianwei Zhao,Peng Li
Conventional planar copper (Cu) current collectors severely limit the rate capability and cycle life of lithium-ion batteries. To overcome this, we report a three-dimensional (3D) porous Cu-Sn alloy architecture fabricated via scalable, cyanide-free electrodeposition and chemical dealloying methods. Its core innovation lies in the synergistic benefits of the porous structure and Cu-Sn alloying: the interconnected pores facilitate rapid Li⁺ transport and buffer graphite's volume expansion, while the intrinsic lithiophilicity of Sn ensures a stable, low-impedance interface. Consequently, an anode using the optimized porous collector delivers a remarkable specific capacity of 120.3 mAh g⁻¹ at 5C, representing a nearly five-fold enhancement in high-rate capacity retention over conventional Cu foil. The collector also confers exceptional cycling stability, enabling a 57.2 % capacity increase over 200 cycles, in stark contrast to the decay observed with standard foil. Electrochemical analysis confirms that the porous design drastically reduces electrode impedance while maintaining structural integrity. This work validates that engineering the current collector architecture is a powerful and effective strategy for developing high-performance, fast-charging batteries.
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