RARE METALS
·
2024
·
IF 9.6
Feng Yu-Xiao,Yu Hui-Jun,Lu Tian-Guang,Zheng Zi-Ye,Tian Shuang,Xiang Li,Zhao Shan,Wang Shu-Guang,He Zuo-Li
Metal clusters or even single-atoms dispersed and anchored on the photocatalysts’ surface can enhance photocatalytic performances on organic pollutant oxidation. Here, a simple photoreduction method was used to create atomically dispersed metal single-atoms/clusters (MSCs, M = Cu, Pd, Au and Ag) on P-modulated tubular carbon nitride (TCN). The obtained MSCs@TCN demonstrated excellent photocatalytic performances for the degradation of sulfamethazine (SMZ). In particular, the photocatalyst with 2 wt% Cu loading showed ultrahigh SMZ oxidation efficiency ( k = 0.06110 min −1 ), almost three times that of TCN ( k = 0.02066 min −1 ). It also shows excellent stability in the 5th-cycle measurements. The improved photocatalytic activity of the CuSCs@TCN is ascribed to the synergistic promotion of photogenerated charge separation by Cu single-atoms/clusters as active sites, accelerated charge transfer from bulk TCN to Cu sites through Cu–N x interaction. Meanwhile, the active sites of Cu single-atoms/clusters could promote the production of ·O 2 − , which participates in organic oxidation with strong oxidizing holes (h + ). This strategy paves a new avenue for designing high-performance photocatalysts decorated with metal single-atoms and clusters.
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Coatings
·
2024
·Vol. 14
·期 2
·164
·
IF 2.9
Wanlei Dai,Zhaoyi Jiang,Yali Sun,Juhua Wang,Zeran Gao,Haoyu Xu,Xinzhan Wang,Chao Gao,Qiang Ma,Yinglong Wang,Wei Yu
In this study, a feasible strategy is proposed for directly depositing high-quality Cu(In,Ga)Se2(CIGS) films using Na-doped targets in a selenium-free atmosphere to boost the power conversion efficiency (PCE) of CIGS solar cells. Introducing a small amount of sodium dopant effectively promoted the textured growth of CIGS crystals in the prepared films, resulting in larger grain sizes and a smoother interface. The higher MoSe2content at the CIGS/Mo interface increased the carrier lifetime in the films. In addition, sodium doping increased the proportion of Se atoms on the film surface and reduced the concentration of defects caused by the direct sputtering of the films in the selenium-free atmosphere. Therefore, the separation and transportation of photo-generated carriers in the devices were effectively enhanced. Using the optimized parameters, a record-high PCE of 17.26% was achieved for the 7.5% Na-doped devices, which represents an improvement of nearly 63%.Keywords:Cu(In,Ga)Se2;sodium-doped targets;magnetron sputtering;solar cells
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NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 7
·2889-2897
·
IF 2.5
Yanan Zhu,Yongchang Yang,Shiqiang Li,Chang Zhu,Zegang Qiu,Qianqian Zhu
The development of efficient materials for adsorption desulfurization has attracted much attention for the safety of humans and the ecosystem. Metal–organic frameworks have shown promise in removing organic sulfur compounds in liquid fuels, while another star material – MXene has rarely been applied in this field. In this study, Ti3C2Tx MXene/Cu-MOF composites with different MXene contents (3.3%, 6.7%, and 13.3%) were synthesized via an in situ precipitation method. Characterization showed that the Cu-MOF was successfully coated on the surface of Ti3C2Tx MXene and partially embedded between the MXene nanosheets, restraining the agglomeration of both MXene and the Cu-MOF. The optimal composite-3.3%MXene/Cu-MOF presented the largest surface area of 166.6 m2 g−1. Compared to MXene and Cu-MOF, 3.3%MXene/Cu-MOF exhibited an enhanced adsorption performance for methyl phenyl sulfide in the model fuel with an equilibrium adsorption capacity of 87.4 mg g−1. Furthermore, the effects of adsorption parameters, adsorption kinetics, adsorption isotherms, and the adsorption mechanism, and regenerative performance of 3.3%MXene/Cu-MOF were comprehensively discussed. A pseudo-second order kinetic model and the Langmuir adsorption isotherm were found to better explicate the adsorption behavior on 3.3%MXene/Cu-MOF, which exhibited a theoretical maximum adsorption capacity of 183.9 mg g−1. This work hopes to shed light on the material design for adsorption desulfurization.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Ling Zhou,Yaoyu Zhang,Yue Liu,Zhongbiao Wu
This work investigated the reaction behaviors of diethylamine (DEA) catalytic oxidation on various Cu-based catalysts with different supports (TiO 2 , HZSM-5(27), HZSM-5(130) and S-1). It was found that the acidic environment of catalysts greatly influenced reaction pathways of DEA oxidation. On Cu 5 /TiO 2 catalyst mainly with Lewis acidity, DEA preferentially dissociated through a two-step dehydrogenation to produce acetonitrile and ethylene, while on Cu 5 /HZSM-5(27) catalyst with strong Brønsted acidity, DEA could directly decompose into ethylamine and ethylene via N-C cleavage. Both pathways existed simultaneously over Cu 5 /HZSM-5(130) with decreased Brønsted acidity. Thereafter, acetonitrile could be further oxidized on the Cu 5 /TiO 2 catalyst to generate a large amount of NO x via NCO(a) intermediates over-oxidation, while ethylamine on Cu 5 /HZSM-5 samples would convert to acetamide and then produced N 2 and CO 2 . The Cu 2+ species due to enriched Brønsted acid sites in Cu 5 /HZSM-5 catalysts ensured excellent N 2 selectivity via internal SCR mechanism. Additionally, the strong Brønsted acidity of Cu 5 /HZSM-5(27) could induce the polymerization of carbonaceous intermediates and thereby resulted in severe coke deposition. As for Cu 5 /HZSM-5(130) and Cu 5 /S-1 with relatively lower Brønsted acidity and reducibility would release some unwanted gas-phase by-products like ethyl-isocyanate. This work provided useful guidance for designing NVOCs catalysts with high activity and less toxic by-products.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yunfei Bao,Liping Zhao,Fengshuo Xi,Shaoyuan Li,Xiuhua Chen,Jijun Lu,Zhongqiu Tong,Kuixian Wei,Bin Luo,Wenhui Ma
Silicon anodes are promising candidates for next-generation lithium-ion batteries owing to their high theoretical capacity. However, the practical application of silicon anodes is limited by severe volume expansion and poor cycling stability. This study presents a sustainable and cost-effective strategy for synthesizing high-performance graphene-like carbon (GLC)-coated silicon/nano‑copper (Si/Cu@GLC) composites using photovoltaic silicon cutting waste (SCW) as the starting material. The synthesis combines copper-assisted chemical etching with the catalytic pyrolysis of humic acid, yielding a composite with enhanced electrochemical performance. Economic and environmental assessments reveal that the SCW-derived Si/Cu@GLC exhibits lower production costs and CO 2 emissions than conventional silicon anode fabrication processes. The Si/Cu@GLC composite exhibits a high initial discharge capacity of 2333.98 mAh g −1 , along with excellent cycling stability and superior rate capability. The GLC coating and nanoporous structure synergistically mitigate volume expansion, resulting in a low expansion rate of only 157 % after 100 cycles. Upon integration into a full cell with an LFP (Lithium Iron Phosphate) cathode, Si/Cu@GLC exhibits excellent cycling stability, retaining 86.7 % of its capacity after 200 cycles at 0.5C. This study provides a sustainable and scalable approach for upcycling photovoltaic silicon waste into high-performance silicon–carbon anodes. The findings highlight the potential of an eco-friendly circular production model that combines economic viability with superior battery performance.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuhan Fu,Yali Li,Yang Chen,Jidong Hu,Hai Liu,Jiawei Zhao,Shoukun Zhao,Hongyun Ma,Yujun Fu,Deyan He,Junshuai Li
The performance of aqueous zinc-ion batteries is frequently hindered by anode-related issues such as uncontrolled dendrite formation and side reactions. Metal–organic frameworks (MOFs), characterized by their highly ordered porous structures, remarkably large specific surface areas, and tunable active sites, offer a promising solution by regulating Zn2+ flux and promoting uniform Zn deposition. In this study, a Cu-MOF was synthesized in situ on carbon cloth (CM-C) and functioned as an ion-buffering layer within the battery. This innovative configuration significantly mitigates side reactions, achieving an extended cycle life of nearly 800 h at a high current density of 10.0 mA cm–2 (areal capacity: 10.0 mA h cm–2) and nearly 1200 h at 5.0 mA cm–2. After 2000 cycles at 5.0 mA cm–2, the battery demonstrated an average Coulombic efficiency of 99.3%. Additionally, the full battery containing CM-C demonstrated enhanced capacity and stability. This simple and novel structure provides new possibilities for enhancing the cycling stability of zinc-ion batteries.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Chaoran Yang,Shuyu Liang,Cong Zhang,Tianyu Zhang,Wenfu Xie,Min Li,Qiang Wang
Copper (Cu)-based catalysts have demonstrated promising selectivity and activity in electroreducing CO 2 to multi-carbon (C 2+ ) products. Among them, oxide-derived Cu catalysts exhibit high selectivity for C 2+ products in the CO 2 electroreduction reaction (CO 2 RR). Cu chalcogenide-derived catalysts offer a promising approach to tune the electronic structure of Cu sites via surface reconstruction, thereby affecting the product distribution. However, the effect of in-situ anion dissolution, especially Se ions, on the electronic structure of Cu selenides at negative potentials remains overlooked, despite its potential to significantly affect catalytic activity. In this study, we developed a series of Cu selenide catalysts with varying Cu/Se ratios to optimize electronic structures and enhance CO 2 RR performance. Among them, Cu 1.8 Se, featuring Cu vacancies, exhibited the highest activity for C 2+ products formation and the highest C 2+ /C 1 products ratio, nearly 2–3 times greater than the others. This catalyst also demonstrated good stability over 38 h of electrolysis under −450 mA cm −2 , with a maximum C 2+ products Faradaic efficiency (FE) of up to 70 %. In-situ surface reconstruction analysis revealed Se loss and Cu + /Cu 2+ reduction of the initial Cu 1.8 Se catalyst, forming Cu/Cu x Se structures with Cu vacancies, identified as the real active sites. Density functional theory (DFT) calculations and in-situ infrared absorption spectroscopy confirmed that Cu vacancies play a critical role in stabilizing *CHOCO intermediates for C–C coupling while suppressing hydrogen evolution reaction and C 1 products formation. These findings highlight Cu vacancy engineering as an effective strategy for enhancing C 2+ selectivity in CO 2 RR.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Shiyu Huang,Deqi Fan,Chengxiao Zhao,Xin Li,Xiaofei Yang
The photocatalytic conversion of anthropogenic carbon dioxide (CO 2 ) into solar fuels using semiconductor nanomaterials represents a promising and sustainable approach to addressing both energy sustainability and climate change concerns. Developing highly efficient semiconductor-based photocatalysts to tailor reaction pathways of CO 2 reduction is the key to producing value-added products with desirable performance. Herein, we report a novel copper-doped indium oxide (Cu-doped In 2 O 3 ) nanostructure prepared via the electrospinning technique, followed by annealing to enhance photocatalytic CO 2 reduction. Our findings demonstrate that modifying the bulk In 2 O 3 with copper enables Cu-doped In 2 O 3 nanofibers to catalyze the CO 2 reduction reaction more efficiently. In situ FTIR spectra measurements were utilized to identify the reaction intermediates and gaseous products for validating the reaction pathway. Combined with in situ electron paramagnetic resonance (EPR) and vibrational spectroscopy measurements, which revealed that interstitial Cu doping induces lattice distortions and oxygen vacancy (O V ) formation, effectively enhancing visible light absorption, accelerating charge separation, and migration. Consequently, the optimized In 2 O 3 -Cu3% nanofiber photocatalyst demonstrated outstanding selectivity (100 %) and a CO production rate of 45.5 μmol·g −1 ·h −1 , which is approximately six times higher than In 2 O 3 . Mechanistic studies have indicated that O V defects serve as electron reservoirs to suppress the recombination of photogenerated charges, while simultaneously creating abundant CO 2 chemisorption sites in nanostructures.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Yanli Zhang,Jiale Zhao,Simeng Zeng,Zixuan Liu,Bo Wang,Fuhua Lin
In this paper, a novel Cu/F co-doping strategy is proposed to modify the electrochemical performance of Sr 2 Fe 1.5 Mo 0.5 O 6– δ (SFM) cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The pristine SFM, Cu-doped Sr 2 Fe 1.4 Cu 0.1 Mo 0.5 O 6− δ (SFCM) and Cu/F co-doped Sr 2 Fe 1.4 Cu 0.1 Mo 0.5 O 5.9− δ F 0.1 (SFCMF) powders were synthesized by acid-glycine combustion method, and the impacts of Cu/F co-doping on the performance of SFM cathode were investigated systematically. It's found that Cu-doped SFCM has higher oxygen vacancy content and electrical conductivity than the pristine SFM and Cu/F co-doped SFCMF cathodes. While the Coulombic force between B-sites metallic ions and oxygen ions are significantly weaken for SFCMF, enhancing the mobility of lattice oxygen. Due to the combined effects of Cu and F doping, SFCMF cathode exhibits the best electrochemical performance among all investigated samples. At 600 °C, the polarization resistant for SFCMF cathode is 1.79 Ω cm 2 , decreased by 43.71 % in contrast to the parent SFM cathode. These results indicate that Cu/F co-doping is an effective strategy to improve the electrochemical properties of perovskite cathode materials.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Changsong Chen,Xusheng Yang,Zhiyong Fu,Le Zhou,Bin Xu,Kaiming Zhang,Shengbin Zhou,Limei Zhou,Weidong Jiang
Traditional hydrogenation requires noble metal catalysts and harsh conditions. To overcome these intrinsic drawbacks, herein, sulfur-doped Co3O4–CuO/CNS bicomponent nanocomposites were prepared using S-modified chitosan (CNS) as a template via the precipitation method. The experimental results demonstrated that the incorporation of sulfur (S) significantly enhanced the synergistic effect of the Cu–Co-based bimetallic system, thereby improving catalytic activity. Notably, Co3O4–CuO/CNS-10 exhibited remarkable catalytic performance in the hydrolytic dehydrogenation of sodium borohydride, achieving a hydrogen generation rate (HGR) of 357.9 mL·min–1·g–1cat. Furthermore, Co3O4–CuO/CNS effectively catalyzed the tandem hydrogenation reduction of m-nitrobenzene (m-CNB) to m-nitroaniline (m-CAN) in the presence of sodium borohydride (NaBH4), as evidenced by an m-CAN yield of up to 99.80% under highly mild conditions. Also, Co3O4–CuO/CNS-10 displayed high chemoselectivity and regioselectivity for the reduction of various aromatic nitro compounds containing potential reactive functional groups. The doping of sulfur promotes the bimetallic Cu–Co synergistic effects accompanied by the increases of the Co2+/Co3+ ratio and enriches oxygen vacancy defects on the surface, thereby enhancing the catalytic activity of the screened heterogeneous catalyst. This work highlights the key role of sulfur and provides an innovative strategy for elevating the catalytic reactivity of bimetallic nanocatalysts.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Junfei Wu,Qin Zhang,Zhuojun He,Yingli Zhang,Yangli Chen,Hai-Bo Liu,Jing Wang
Tetracycline antibiotics (TCs) are widely distributed in the environment owing to excessive usage and incomplete metabolic breakdown, posing significant risks to ecosystems and human health. Herein, a bifunctional material, Cu-TATB-PCA, was prepared for simultaneous adsorption and detection of TCs. The material was constructed using Cu-MOF as the structural scaffold, with 1-pyrenecarboxylic acid (PCA) grafted via a postsynthetic ligand exchange (PSE) approach. The incorporated PCA moiety functions as both an active site for enhanced adsorption capacity and a fluorescent reporter for sensitive detection. Cu-TATB-PCA demonstrated a remarkable adsorption performance toward TCs, with a maximum adsorption capacity of 520.8 mg/g for oxytetracycline (OTC), 473.9 mg/g for chlortetracycline, and 469.5 mg/g for tetracycline (TC). The high adsorption capacity was mainly attributed to the dominant role of π-π interactions, which worked synergistically with coordination bonds, electrostatic interactions, and hydrogen bonds to collectively contribute to the adsorption process. In addition, Cu-TATB-PCA exhibited a highly sensitive fluorescent response toward TCs due to the mechanism of inner filter effect, which achieved a detection limit of 0.586 μM for TC and 0.776 μM for OTC. The streamlined and efficient material design paradigm paves the way for the development of bifunctional adsorption-detection materials and offers a promising avenue for future research endeavors in this field.
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CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Yang Chen,Diwen Zhou,Yongli Chang,Hongqiao Lin,Yunzhao Xu,Yong Zhang,Ding Yuan,Lizhi Wu,Yu Tang,Chengyi Dai,Xingang Li,Qinhong Wei,Li Tan
CO 2 hydrogenation to CH 3 OH is of great significance for achieving carbon neutrality. Here, we show a urea-assisted grinding strategy for synthesizing Cu-Zn-Ce ternary catalysts (CZC-G) with optimized interfacial synergy, achieving superior performance in CO 2 hydrogenation to methanol. The CZC-G catalyst demonstrated exceptional methanol selectivity (96.8%) and a space-time yield of 73.6 g MeOH ·kg cat –1 ·h –1 under optimized conditions. Long-term stability tests confirmed no obvious deactivation over 100 h of continuous operation. Structural and mechanistic analyses revealed that the urea-assisted grinding method promotes the formation of Cu/Zn-O v -Ce ternary interfaces and inhibits the reduction of ZnO, enabling synergistic interactions for efficient CO 2 activation and selective stabilization of formate intermediates (HCOO*), which are critical for methanol synthesis. In-situ diffuse reflectance infrared Fourier transform spectra and X-ray absorption spectroscopy studies elucidated the reaction pathway dominated by the formate mechanism, while suppressing the reverse water-gas shift reaction. This work underscores the critical role of synthetic methodologies in engineering interfacial structures, offering a strategy for designing high-performance catalysts for sustainable CO 2 resource utilization.
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