DALTON TRANSACTIONS
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2025
·
IF 3.3
Qingmiao Mu,Jia Li,Hongxi Gu,Lijun Ren,Juan Du,Hualei Cheng,Dengwei Hu
Photoswitchable fluorescent materials (PFMs) have attracted considerable attention due to the intrinsic advantages of non-contact operation, cleanliness, and non-invasiveness. Conventional PFMs always require complicated preparation processes with poor fluorescence switching properties, which are affected by the mechanisms of Föster resonance energy transfer (FRET) or photoinduced electron transfer (PET). The WO3-x QDs/Cu NCs composite films are prepared on different substrates by a solution casting method and displays outstanding fluorescence switching properties owing to the super photochromic performance of WO3-x QDs and aggregation-induced fluorescence of Cu NCs. The composite film exhibits reversible on/off switchable fluorescence under UV light irradiation and heat treatment based on the inner filter effect (IFE) mechanism. The composite film shows dynamic variations of the dual-mode signals, and the applications of UV sensing and anti-counterfeiting are analyzed. Sensitive dual-mode detection is realized in UV sensing, especially for UVB. The composite film has a dual-modal imaging capability with good reproducibility and high resolution for security information encryption and anti-counterfeiting. This work provides a novel strategy for fabricating advanced PFMs for multiple optical applications.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Li Hefei,Wei Pengfei,Liu Tianfu,Li Mingrun,Wang Chao,Li Rongtan,Ye Jinyu,Zhou Zhi-You,Sun Shi-Gang,Fu Qiang,Gao Dunfeng,Wang Guoxiong,Bao Xinhe
Producing valuable chemicals like ethylene via catalytic carbon monoxide conversion is an important nonpetroleum route. Here we demonstrate an electrochemical route for highly efficient synthesis of multicarbon (C 2+ ) chemicals from CO. We achieve a C 2+ partial current density as high as 4.35 ± 0.07 A cm −2 at a low cell voltage of 2.78 ± 0.01 V over a grain boundary-rich Cu nanoparticle catalyst in an alkaline membrane electrode assembly (MEA) electrolyzer, with a C 2+ Faradaic efficiency of 87 ± 1% and a CO conversion of 85 ± 3%. Operando Raman spectroscopy and density functional theory calculations reveal that the grain boundaries of Cu nanoparticles facilitate CO adsorption and C − C coupling, thus rationalizing a qualitative trend between C 2+ production and grain boundary density. A scale-up demonstration using an electrolyzer stack with five 100 cm 2 MEAs achieves high C 2+ and ethylene formation rates of 118.9 mmol min −1 and 1.2 L min −1 , respectively, at a total current of 400 A (4 A cm −2 ) with a C 2+ Faradaic efficiency of 64%.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Tianwei Zhao,Gang Cheng,Wuxia Zhang,Jinyan Xiong
Hollow-structured TiO 2 is promising for photocatalytic CO 2 reduction due to its high surface area and light absorption. This study aims to enhance its photocatalytic activity through the engineering of Cu and CuAg alloy cocatalysts. Hollow TiO 2 was synthesized by a hard template method, followed by Cu loading and CuAg alloy formation via a chemical replacement reaction. The optimal 7 % Cu loading achieved the highest CH 4 yield of 2.47 μmol g −1 h −1 among the TiO 2 -Cu composites. Introducing Ag further enhanced the performance, with the Cu:Ag = 9:1 alloy boosting the CH 4 yield to 6.72 μmol g −1 h −1 , approximately 14 times that of pure TiO 2 . Characterization techniques such as XRD, SEM, and XPS were also employed to analyze the phase composition, microstructure, and photoelectrochemical properties of the synthesized materials. The experimental findings indicate that the introduction of the CuAg alloy significantly promotes charge separation and transfer efficiency, and increases the effective active sites on the TiO 2 surface, thereby greatly enhancing the efficiency of the photocatalytic reaction. These findings offer insights into the design of efficient photocatalytic materials for sustainable energy applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Li Gan,Xiaoxue Zhang,Lei Guo,Muhammad Ajmal,Ru Jia,Xiaolei Guo,Chengxiang Shi,Lun Pan,Faryal Idrees,Xiangwen Zhang,Zhen-Feng Huang,Guidong Yang,Ji-Jun Zou
The electrochemical reduction of nitrate (NO 3 − RR) represents a compelling approach for the treatment of wastewater, serving as both a sustainable substitute to the energy-intensive Haber-Bosch process and a viable alternative to direct electroreduction of N 2 . However, the process involves multiple electron and proton transfer steps and a complex reaction pathway, leading to low Faraday efficiency and selectivity. Herein, we demonstrated a directional surface reconstruction to generate CoP-Cu/Co(OH) 2 heterojunction for synergistic catalysis of NO 3 − RR. Impressively, a high ammonia generation rate of 9.91 mmol h −1 cm −2 and a Faraday efficiency of 99.2 % can be achieved at an industrial-relevant current density of 2 A cm −2 . Moreover, the catalyst exhibited exceptional durability, maintaining the activity for 110 h under industrial current density. Such outstanding NO 3 − RR performance can be ascribed to the synergistic catalytic effect among the active sites of Cu, CoP and Co(OH) 2 , as well as the excellent stability of self-supported catalyst. Specifically, Cu and CoP sites synergistically promote the conversion of NO 3 − to NO 2 − and NO 2 − to NH 3 . Meanwhile, the partial reconstructed Co(OH) 2 from CoP enhances water dissociation, thereby supplying active hydrogen (*H) essential for NO 3 − RR. When applied to a membrane electrode assembly (MEA) system, CoP-Cu/Co(OH) 2 can deliver satisfactory ammonia production rate with appreciable economic benefits at industrial-level current densities, highlighting its potential for industrial applications.
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JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Wanting Yang,Zhuoyue Lan,Xiong Li,Yunchuan Li,Hang Li,Yunxiang Du
To efficiently enrich fine copper-molybdenum ore, a pioneering method was employed by utilizing MCO (trimethyl-pyridin) and kerosene as high-efficiency composite collectors in the flotation process. Micro-flotation and actual ore flotation tests demonstrated that the composite collector manifested superior collection capacity and selectivity compared to using a single collector. Furthermore, the inclusion of kerosene reduced collector consumption, thereby lowering overall reagent costs. TOC test results indicated that the composite collector possesses a high adsorption quantity on the mineral surface. Additionally, contact angle measurements demonstrated that the composite collector significantly enhanced the surface hydrophobicity of chalcopyrite and molybdenite. FT-IR, XPS, and ToF-SIMS analyses were conducted to investigate the adsorption mechanism. The results illustrated that MCO adsorbed to mineral surfaces by forming complexes with Cu atoms in chalcopyrite and Mo atoms in molybdenite, respectively. The primary interaction between kerosene and copper-molybdenum ore involved hydrophobic attraction with kerosene physically adhering to the mineral surface to form hydrophobic aggregates. Hence, this study presented an effective procedural approach for the flotation of fine copper-molybdenum ore.
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Materials Today Chemistry
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2025
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IF 6.7
Shan Tai,Jeremy Dhainaut,Sebastien Royer,Rui Zhong,Shuo Chen,Nisrine Hammi
A novel copper-modified graphitic carbon nitride catalyst (CuNC) with a hierarchical, urchin-like flower morphology was developed for the catalytic reduction of 4-nitrophenol (4-NP). Synthesized via a facile hydrothermal method, the CuNC catalyst with 32 wt% copper loading exhibited exceptional activity, achieving complete conversion of 4-NP to 4-aminophenol (4-AP) within 14 s at a concentration of 0.11 mM in both river water and tap water. This performance surpasses that of conventional catalysts, highlighting the significant impact of the unique urchin-like flower morphology on catalytic efficiency. The enhanced activity is attributed to the synergistic effects of high copper dispersion, nitrogen doping, and efficient mass transfer facilitated by the hierarchical structure. This study demonstrates the potential of CuNC as an eco-friendly and cost-effective catalyst for the reduction of nitroaromatic compounds in real water samples, paving the way for its integration into sustainable catalytic systems for environmental remediation.
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Scientific Reports
·
2014
·Vol. 4
·期 1
·1-6
·
IF 5.078
Han Lin,Liu Hui,Cui Penglei,Peng Zhijian,Zhang Suojiang,Yang Jun
Noble metal nanoparticles with hollow interiors and customizable shell compositions have immense potential for catalysis. Herein, we present an unique structure transformation phenomenon for the fabrication of alloy Cu 3 Pt nanoframes with polyhedral morphology. This strategy starts with the preparation of polyhedral Cu-Pt nanoparticles with a core-shell construction upon the anisotropic growth of Pt on multiply twinned Cu seed particles, which are subsequently transformed into alloy Cu 3 Pt nanoframes due to the Kirkendall effect between the Cu core and Pt shell. The as-prepared alloy Cu 3 Pt nanoframes possess the rhombic dodecahedral morphology of their core-shell parents after the structural evolution. In particular, the resulting alloy Cu 3 Pt nanoframes are more effective for oxygen reduction reaction but ineffective for methanol oxidation reaction in comparison with their original Cu-Pt core-shell precursors.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xia Wei,Yuhan Zhou,Tianyao Wang,Hongbin Dai,Song Li
The hydrazine oxidation reaction (HzOR) is essential for direct hydrazine fuel cells and offers a promising alternative to the kinetically sluggish oxygen evolution reaction in water splitting. In this work, we present the design and synthesis of a novel Ni-Zn-Cu catalyst with a three-dimensional (3D) interconnected hollow network structure for HzOR. This unique 3D hollow architecture, comprising Ni-Zn-Cu nanosheets, significantly enhances HzOR catalytic performance by increasing the number of accessible active sites and improving both mass and charge transport. Additionally, the incorporation of multifold nanotwins within the catalyst induces lattice strain and reduces coordination numbers, optimizing the electronic structure and d -band center to strengthen hydrazine adsorption and catalyst reactivity. The Ni-Zn-Cu catalyst exhibits remarkable HzOR performance, achieving a current density of 200 mA·cm −2 , and a mass activity of 10,129 A·g −1 at −0.05 V vs. RHE, and a low onset potential of −0.15 V vs. RHE. Furthermore, it retains 96 % of its initial activity after 20 h of continuous electrolysis. This work marks a significant advancement in the development of highly efficient and durable HzOR catalyst.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Ning Pan,Minjie Chen,Junjie Tan,Lei Liao,Rong Nie,Jianpeng Xu,Run Lei,Hao Zou,Hao Lei,Zhijie Chen,Xiaoqin Nie
Fabricating efficient copper-based adsorbents for radioactive iodine removal is crucial for environmental protection and waste volume reduction, particularly in the treatment of radioactive waste from hospitals. In this study, a composite of reduced graphene oxide (RGO) supported by Cu-Cu 2 O nanocrystals (Cu-Cu 2 O/RGO-3) was synthesized via a one-step method and evaluated for its effectiveness in iodide removal from water. The composite was comprehensively characterized using XRD, SEM, FT-IR, and XPS analyses. The effects of copper content, pH, contact time, iodide concentration, temperature, and coexisting anions on iodide uptake were systematically investigated. In the Cu-Cu 2 O/RGO-3 composite, copper primarily existed as metallic Cu, along with a small amount of Cu 2 O. Cu-Cu 2 O/RGO-3 exhibited a significantly higher I - adsorption capacity compared to Cu powder, effectively reducing I - concentrations from 8.6 to 0.029 mg/L within just 3 min, demonstrating a rapid uptake rate for trace I - . Furthermore, the maximum adsorption capacity reached 152.1 mg/g at pH 7.0, surpassing that of many reported copper-based adsorbents. The composite showed selectivity in the presence of competing ions like Cl - , NO 3 - , and SO 4 2- , but HCO 3 - at higher concentrations inhibited I - adsorption. Post-adsorption analysis revealed that iodine was present solely as CuI. XPS analysis indicated that residual carboxyl groups in RGO facilitated the oxidation of Cu and promoted redox reactions between Cu(OH) 2 and Cu, providing multiple pathways for generating additional Cu + ions, thereby enhancing I - adsorption. This study offers a practical approach for modifying carbon-based materials with copper compounds, emphasizing the potential of copper-based materials for effective iodide purification in wastewater treatment.
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Surfaces and Interfaces
·
2025
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IF 6.3
Rui Xu,Jingqi Bao,Ningru Xuan,Bingxin Zhou,Lingshan Liao,Qiusheng Zhou,Di Wu,Linfang Lu
The template sacrifice method is a pivotal strategy for synthesizing noble metal-based nanocrystals with enhanced catalytic properties. A critical limitation of this method lies in the challenges associated with regulating the morphology of the resultant nanocrystals. This study demonstrates that the morphology of PtCu nanocrystals can be effectively modulated by adjusting the pH in the Cu 2 O template sacrifice method. Various PtCu nanocrystals, including PtCu hollow nanoboxes and PtCu nanodendrites of differing sizes, have been successfully synthesized. Mechanistic investigations reveal that reduced pH corresponds to a lower electrode potential of Cu 2 O, which enhances its reducing capacity, thereby intensifying the galvanic replacement reaction with the Pt precursor. The driving force of Kirkendall effect during this process can be systematically manipulated via pH adjustments, leading to the generation of PtCu nanocrystals with diverse morphologies. The synthesized PtCu nanocrystals demonstrate significantly improved methanol oxidation reaction activity compared to commercial Pt/C. Specifically, the PtCu hollow nanoboxes exhibit a methanol oxidation reaction (MOR) activity of 1.93 A mg⁻¹, which is 5.4 times greater than that of the commercial Pt/C. Physical characterizations suggest that the superior catalytic performance of PtCu hollow nanoboxes catalyst is attributed to its increased surface electronic density of Pt resulting from the special hollow and porous morphology. The pH control strategy outlined in this research holds promise for the synthesis of other Cu-based nanoalloys with varying morphologies, and may be applicable to other catalytic systems.
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RSC Advances
·
2025
·Vol. 15
·期 15
·11893-11901
·
IF 4.6
Xixi Wu,Xiang Feng,Peng Yu,Jing Zhang,Rui Liu
Breast cancer remains a significant global health concern owing to the limitations of conventional therapies, such as side effects, drug resistance, and high costs. Nanocatalytic therapy has emerged as a promising alternative due to its tumor specificity, spatiotemporal controllability, and noninvasiveness. However, its effectiveness is limited by endogenous antioxidants like glutathione (GSH) and the low catalytic activity of nanocatalysts. Herein, an Cu/Au-doped polypyrrole nanocatalyst, Cu-AuPP, with multiple catalytic activities is developed by sequentially polymerizing pyrrole monomers using CuCl2 and HAuCl4, followed by PEGylation. The obtained Cu-AuPP catalyzes the production of hydroxyl radicals (·OH) and facilitates the oxidation of GSH to GSSG via redox reactions mediated by multivalent Cu ions, leading to oxidative damage, mitochondrial dysfunction, and tumor cell apoptosis. Upon 1064 nm laser irradiation, these catalytic activities were enhanced by elevated temperature and electron–hole separation mediated by Au nanoclusters, resulting in more intense oxidative damage to tumor cells. Collectively, the developed Cu-AuPP nanocatalytic medicine capable of simultaneously catalyzing GSH depletion and ·OH production via several improved catalytic mechanisms, has significant promise for the treatment of malignant tumors.
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Materials Today Bio
·
2025
·
IF 10.2
Yajuan Hu,Wei Xu,Linghan Sun,Xuemin Ma,Peirong Zhou,Chuankai Zhang,Rui Cai,Xia Wang,Hua Yang,Gang Tao,Junliang Chen,Yun He
Periodontitis is a chronic inflammatory disease characterized by oxidative stress, immune system imbalance, and the progressive destruction of periodontal tissues. Traditional treatment approaches are limited by the incomplete eradication of pathogens, the risk of antibiotic resistance, inadequate control of inflammation and oxidative stress, and restricted tissue regeneration capacity. Therefore, this study proposes an injectable multifunctional Laponite/gelatin hydrogel loaded with epigallocatechin gallate (EGCG)-copper ion (Cu 2+ ) complexes as a localized therapy for periodontitis. EGCG exhibits antioxidant, anti-inflammatory, and antimicrobial properties; however, its clinical application is hindered by poor stability and bioavailability. Cu 2+ coordination enhances EGCG stability and antioxidant capacity while improving its antimicrobial efficacy. Experimental results demonstrate that the Laponite/gelatin hydrogel is adaptable for the localized delivery of EGCG-Cu, with bioactive metal ions such as Li + , Mg 2+ , and Si 4+ contained in Laponite, which promote osteogenesis and periodontal tissue regeneration. In vitro and in vivo studies confirm that this hydrogel exhibits excellent biocompatibility, effectively inhibits Porphyromonas gingivalis , suppresses M1 polarization while promoting M2 polarization, and facilitates periodontal tissue repair. Therefore, this study provides promising insights into a localized therapeutic strategy for periodontitis.
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