CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Weixin Li,Qing Liu,Zhongxuan Yin,Yongqing Ma,Ganhong Zheng,Chuhong Zhu,Zhenxiang Dai,Meiling Wang
The photocatalytic conversion of CH 4 into value added liquid products in high yield has always been a huge challenge due to unavoidable peroxidation. Here, a kind of Cu/ZnS/ZnO x -550 Z type heterojunction is designed for photocatalytic CH 4 oxidation into C1 products (including CH 3 OH, CH 3 OOH and HCHO) by O 2 through the synergistic catalysis of multiple mechanisms. The CH 4 photooxidation reaction at 30 °C yields 56 mmol g −1 of C1 oxygenated products during 8 h, which exhibits a much higher value than those reported in recent studies. In situ Fourier transform infrared spectroscopy, electron spin resonance spectroscopy, X-ray photoelectron spectroscopy, electrochemical measurements and density functional calculation are used to comprehensively clarify the underlying photocatalytic mechanism. It indicates that in situ formed singlet oxygen ( 1 O 2 ) not only plays vital roles in triggering CH 4 photooxidation to C1 products, but also suppresses products peroxidation by inhibiting ·OH formation. The incorporated Cu transforms the ZnS/ZnO heterojunction from type II to Z -scheme, enhances light absorption, and, together with oxygen vacancies, regulates the electronic structure of the catalyst, thereby facilitating the adsorption and dissociation of 1 O 2 , and ultimately achieving high efficiency of CH 4 photooxidation.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Yanjun Wang,Yuancai Lv,Yifan Liu,Minghua Liu
The electrochemical reduction of nitrate for ammonia production is recognized as a viable method to support a sustainable artificial nitrogen cycle. Extensive research has been focused on enhancing the performance and selectivity of electrocatalysts for NO 3 - RR (nitrate reduction reaction). In this study, we show that modifying the surface oxygen species via thermal treatment and dispersant addition is an effective way to improve the NO 3 - RR performance of Cu 2 O/CF. Using advanced spectroscopic methods, we show that thermal treatment and dispersant addition can greatly boost the generation of oxygen vacancies and hydroxyl groups on the surface of Cu 2 O/CF. Electrocatalytic reaction rate experiment, in-situ FT-IR, DEMS analyses and DFT calculations further suggest that oxygen vacancies on the Cu 2 O/CF surface promote the adsorption and conversion of nitrate and its intermediate, nitrite. Meanwhile, hydroxyl groups promoted the selective hydrogenation of NO to NH 3 . Our findings highlight the essential role of surface oxygen species in NO 3 - RR and provide a foundation for designing advanced electrocatalysts through surface engineering approaches.
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Green Chemical Engineering
·
2025
·
IF 7.6
Jiankun Yu,Weixiao Sun,Kuan Huang,Jin Xu,Fuzeyu Zhong,Xiaohu Ge,Wenyao Chen,Gang Qian,Yueqiang Cao,Jianrong Zeng,Jianbo Ma,Xinggui Zhou,Xuezhi Duan,Jing Zhang,Lilong Jiang
Due to escalating carbon emissions, increasing attention is being focused on the synthesis of biomass-derived liquid fuels with a low CO 2 footprint. Currently, the dominant biobased liquid fuel in the diesel range is green diesel, produced via deoxygenation of non-edible natural/waste oils and their free fatty acid components into engine-compatible diesel-range alkanes. Industrially, sulfided NiMo or CoMo catalysts are typically used, leading to total hydrocarbon yields of 70-80 wt%. However, their inevitable sulfur leaching often contaminates the products and requires the addition of sulfur-containing agents. Here, we developed a highly selective sulfur-free Ni-Cu alloy catalyst by disentangling the electronic and size effects, to enable green diesel synthesis through the decarbonylation of palmitic acid—the most common fatty acid in these feedstocks. An unprecedented decarbonylation product (pentadecane) yield of 98% (on a molar basis) was achieved using a Ni-Cu alloy catalyst with a Ni/Cu ratio of 1:1 under mild reaction conditions (2 MPa H 2 , 250 °C). Minimal metal sintering or leaching was observed after multiple reuses. Kinetic studies show that incorporating Cu into Ni markedly reduces both the apparent activation energy and the reaction order for the conversion of palmitic acid. These results, combined with catalyst characterization, reveal that introducing Cu into Ni not only facilitates the adsorption and activation of the carboxylic hydroxyl group to promote the reductive deoxygenation of palmitic acid into aldehyde/alcohol intermediates—the slow step in decarbonylation—but also weakens the adsorption of C–C bonds on Ni by enhancing its electron density.
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Surfaces and Interfaces
·
2025
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IF 6.3
Yushun Wang,Wenjing Guo,Xuefeng Wei,Hang Yin,Jingyun Jiang,Shouren Zhang,Yannan Zhou
Deep eutectic solvents (DESs) provide enormous opportunities for manufacturing functional, electronegative metal alloys with hierarchical structures—because of the broad working windows for electrochemical reactions and the advantages of multiscale directing chemistry. This work presents the electrodeposition preparation of a hierarchical-structured Cu–Zr amorphous alloy coating from ChCl–EG DES for the first time. The electrochemical behavior of Cu 2+ and Zr 4+ , and the comprehensive microscopic and structural characterizations of the obtained deposits, demonstrate a potential-dependent nucleation and growth mechanism of Cu and Zr species on the surface of Cu foil. The deposits yielded at the lower negative potentials containing small amounts of Zr (< 4.0 at.%) are two-phase, with fibrous Cu a Zr b O c compounds cross-growing on the surface of the leaf-like face-centered cubic Cu phase. In contrast, the deposit obtained at a higher negative potential presents a Christmas tree-like Cu–Zr amorphous alloy structure (9.03 at.% Zr), and the hierarchical multiscale ZrO 2 amorphous layer formed on its surface can enable the native alloy with better corrosion resistance.
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ruiqi Zhang,Yanyan Zhang,Kang Wang,Xitao Wang,Baoquan Zhang
In this work, the heterostructure between Cu particles and ZnFe-LDH semiconductor with lantern shape was constructed by reducing the ternary CuZnFe-LDH using H 2 , and the effects of Cu loading and the formation of heterojunction on photocatalytic CO 2 reduction to CO and CH 4 were investigated. The results showed that the hollow and layer-stacking structure of the catalyst was beneficial to the light utilization, adsorbing and activating of carbon dioxide. The Cu cations could enter into the lattice of ZnFe-LDH to form a ternary CuZnFe-LDH, which could be reduced to Cu particles with smaller size by H 2 and resulting in the heterostructure between Cu and ZnFe-LDH. The loading of Cu particles can significantly enhance the light absorption, photogenerated carriers transfer rate and separation efficiency of ZnFe-LDH, thus improving photocatalytic activity. As expected, Cu 1.6 ZnFe-R catalyst exhibited the highest catalytic activity with CO yield of 45.35 μmol·g cat −1 ·h −1 and CH 4 yield of 39.33 μmol·g cat −1 ·h −1 , which were 2.81 and 6.19 times higher than those of ZnFe-LDH, respectively. Meanwhile, Cu particles acted as electron-rich centers and CO 2 adsorption sites can noticeably improve the CH 4 selectivity and inhibit H 2 production. The Cu 1.6 ZnFe-R catalyst exhibits the highest CH 4 electron-based selectivity of 65.17 %, the highest electrons consumed of 482.80 μmoL·g cat −1 ·h −1 for CO 2 reduction and the lowest H 2 electron-based selectivity of 16.04 %.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
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IF 8.9
Changsheng Xing,Tong Zhang,Miao Wang,Zhendong Shi,Yunzhong Wu,Jie Sheng,Lidong Wang,Weidong Fei
For graphene/metal composites, both the synthesis of graphene and the interfacial bonding with the metal matrix are crucial for determining overall performance. In this study, in-situ nitrogen-doped graphene/Cu composites were successfully fabricated using polyacrylonitrile (PAN) as the carbon source, and the effects of PAN-derived graphene on composite microstructure, mechanical properties, and electrical performance were systematically investigated. The results show that an optimal PAN content of 0.25 wt% promotes the formation of high-quality in-situ graphene, which simultaneously strengthens the copper matrix and improves electrical stability. On the mechanical side, the composite showed a yield strength of 408 MPa and a tensile strength of 427 MPa, with increases of 63 % and 42 %, respectively, compared to pure copper. This enhancement is primarily attributed to dislocation strengthening, grain refinement, and load transfer, with graphene reinforcing the composite by restricting dislocation motion, impeding grain growth, and providing the intrinsic high strength of graphene. On the electrical side, the composite maintained a high room-temperature electrical conductivity of 94.2 % IACS while achieving a reduced temperature coefficient of resistance (TCR) of 3.68 × 10 -3 K −1 , which results from the high intrinsic conductivity and negative TCR of graphene. These findings highlight the dual role of PAN-derived graphene in enhancing both the mechanical and electrical properties, offering valuable insights into the development of high-performance graphene/metal composites for industrial applications.
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RSC Advances
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2025
·Vol. 15
·期 13
·9899-9909
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IF 4.6
Hanghang Zhang,Gang Xu
Copper-based catalysts are widely employed in the catalytic conversion of aromatic compounds to phenolic derivatives. However, single-atom copper catalysts often exhibit limited reactivity and stability. In this study, we addressed these limitations by loading Cu onto NaY zeolite via ion exchange to synthesize a CuY catalyst, followed by Yb modification. By optimizing the Yb content, we significantly enhanced the anisole conversion rate and guaiacol yield. Catalyst characterization revealed that Yb species modulate the electronic structure of copper, favoring the formation of abundant Cu+ species. This electronic modification promotes the catalytic generation of hydroxyl radicals (˙OH) from hydrogen peroxide, thereby accelerating the reaction kinetics. Furthermore, Yb incorporation into CuY induced the formation of oxygen vacancies, which improved hydroxyl radical adsorption and facilitated the generation of metal-oxo species. These synergistic effects collectively increased the reaction's overall conversion efficiency. Under optimized reaction conditions, the Yb/CuY catalyst achieved an anisole conversion of 56.2% and an ortho-selectivity of 74.6%, clearly outperforming previous reports.
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PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2014
·Vol. 18
·期 10
·2829-2835
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IF 2.234
Wang Mo,Yin Huanshun,Fu Zhengliang,Guo Yunlong,Wang Xinxu,Zhou Yunlei,Ai Shiyun
MicroRNAs (miRNAs), a class of small endogenous nonprotein-coding RNAs, regulate a wide range of biological processes, and their abnormal expressions are related to the growth and development of plants. Thus, a simple, rapid, and highly sensitive assay for miRNA detection is of great significance. In this work, a label-free and ultrasensitive assay for miRNA detection using protein cage nanoparticles has been developed. Apoferritin-encapsulated Cu nanoparticles (Cu-apoferritin) could be immobilized on the electrode through special reaction between amino and carboxyl. Hybridization event between the probe DNA and the target miRNA-159a is confirmed by electrochemical oxidation signal after Cu released into the detection buffer by adjusting the pH. This assay is highly selective and sensitive with a low detection limit of 3.5 fM. Moreover, the developed method can even discriminate single-base mismatched strand between the complementary targets. The effect of abscisic acid on the expression level of miRNA-159a in Arabidopsis thaliana seeds was also investigated.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yu Duan,Jia-xuan He,Zi-han Ma,Shu-wen Chen,Ying-ying Huang,Shuo Bao,Jin-lin Lu
Sodium-ion batteries (SIBs) are gaining traction for large-scale energy storage due to sodium's abundance and cost efficiency, yet the structural instability and slow ion transport of P2-type cathodes remain critical challenges. This study employs a high-temperature solid-state approach to develop K/Cu co-doped cathodes, demonstrating that co-doping preserves the P2 phase while optimizing lattice parameters to expand interlayer spacing. The reduction in Mn 3+ content suppresses the Jahn-Teller effect and mitigates P2-O2 phase transitions, enhancing structural reversibility. The optimal K 0.05 Na 0.7 Ni 0.23 Mn 0.67 Cu 0.1 O 2 exhibits a high initial discharge capacity of 123.8 mAh·g −1 at 20 mA·g −1 and maintains 96.80 % capacity after 200 cycles at 200 mA·g −1 , outperforming single K-doped samples (89.83 % retention). Kinetic analyses reveal a sodium-ion diffusion coefficient of 1.06 × 10 −10 cm 2 ·s −1 , attributed to enlarged interlayers and reduced charge transfer resistance. In-situ XRD confirms minimal (002) peak shift (0.42°) during cycling, validating structural stability from K + -pinned interlayers. DFT calculations indicate that Cu doping induces spin-polarized half-metallic behavior, enhancing electron conductivity by increasing density of states near the Fermi level. This work presents a “dual-functional co-doping” strategy in which K + stabilizes interlayers and Cu 2+ optimizes the electronic structure, thereby simultaneously suppressing phase transitions and enhancing ion/electron transport. The proposed approach provides a scalable route for developing high-performance SIBs cathodes, which is crucial for advancing affordable and durable energy storage solutions.
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Journal of the Taiwan Institute of Chemical Engineers
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2025
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IF 6.3
Jun-Feng Lu,Huan Wang,Yi Zhou,Xue-Ying Mao,Xiao-Qian Feng,Shuang Wang,Yong-Hua Zhao
Background Rhodamine B (RhB) poses a significant threat to aquatic ecosystems. While Fenton oxidation process is promising approach for RhB degradation, the conventional Fenton reaction has the narrow pH range and poor reusability. To overcome these, this study developed Fenton-like system with Fe-Cu/HZSM-5 catalyst for effective RhB degradation. Methods A series of Fe x Cu 5-x /HZSM-5 catalysts (x represents the molar ratio of Fe to Cu) were prepared by impregnation. These catalysts were integrated with H 2 O 2 to construct Fenton-like system for the degradation of RhB. The catalysts were characterized by XRD, NH 3 -TPD, XPS, FT-IR, and N 2 adsorption-desorption at low temperature techniques. Significant findings Among the tested catalysts, Fe 3 Cu 2 /HZSM-5 exhibited optimal performance, achieving near-complete RhB degradation (∼100%) under the condition of 45 °C, 5.3 mM/L H 2 O 2 , 3.0 g/L catalyst dosage, and broad pH range (2–5). Mechanistic studies confirmed that hydroxyl radicals (·OH) were the primary oxidants responsible for RhB degradation in Fenton-like system. Under ·OH attacking, RhB underwent a series of reactions such as N-deethylation and disruption of the conjugated structure and was eventually mineralized into CO 2 and H 2 O. Overall, a novel Fe-Cu/HZSM-5 catalyst was developed to address the limitations of the traditional Fenton reaction, providing valuable insights for future research in this field.
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Materials
·
2025
·Vol. 18
·期 23
·5362
·
IF 3.2
Xiang Zhang,Xiudong Yu,Zhaoyang Li,Haishun Liu,Xiang Xiong,Changjiu Chen,Weiming Yang
Phenol, an essential feedstock widely used in manufacturing and chemical industries, inevitably results in the discharge of phenol-laden wastewater. To enhance the phenol-degradation efficiency of Fe-based amorphous alloys, a novel atomic-scale fabrication approach for Fe-Cu galvanic couples is proposed, enabling the rapid and uniform formation of micro/nano Fe-Cu structures on the surface of Fe-based alloys with significant improvement in the catalytic activity towards phenol. Micron/nano Fe-Cu couples can be fabricated within 15 s at 45 °C. Phenol degradation experiments reveal that the pristine amorphous alloy exhibits a 40 min hatching period before the phenol removal process, and it exhibits a kinetic constant (kobs) of 0.1596 min−1after the hatching period, under conditions of 50 °C, 0.5 g/L catalytic loading, 10 mmol/L H2O2, and pH = 3 towards a 50 mg/L phenol solution. With the micro/nano Fe-Cu galvanic couples, thekobsvalue markedly increased to 2.23~2.36 min−1under identical conditions except for 3 mmol/L H2O2, corresponding to approximately a 14-fold improvement. This cost-effective and time-efficient atomic-scale fabrication strategy offers a promising platform for the development of next-generation catalytic alloys and functional materials.
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PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 40
·期 1
·e70473
·
IF 0
Fuhua Wei,Anhui Huang,Qinhui Ren,Min Li,Wei Shang,Diaodiao Zhang,Zhao Liang
In this research, GO/Cu/Cr-MOF composites were fabricated via a dissolution-heat method. The GO/Cu/Cr-MOF composite was characterized using FT-IR, SEM, XRD, and EDS techniques. The characterization results confirmed the presence of Cu and Cr metallic elements in the composite, and FT-IR analysis demonstrated that the organic ligands were successfully coordinated with the metal centers. The characterized GO/Cu/Cr-MOF composite was employed in the removal study of fleroxacin and levofloxacin. The results demonstrate that the addition of 40 mg of the composite to a 40-ppm levofloxacin solution achieved a removal efficiency of 95.9% within 5 h. Likewise, adding the same amount of composite to a 20-ppm fleroxacin solution resulted in a maximum removal efficiency of 98.2% over the same time period. The experimental data were examined using both the kinetic model and the isotherm models. The results revealed that the adsorption of both antibiotics onto the GO/Cu/Cr-MOF composite followed the pseudo-second-order kinetic model and was most accurately represented by the Langmuir isotherm. The experimental results indicate that the adsorption capacity of the GO/Cu/Cr-MOF composite for fleroxacin and levofloxacin reaches its maximum within the pH range of 6 and 8.
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