CERAMICS INTERNATIONAL
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2022
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IF 5.532
Shiyue Wu,Qinglei Jia,Yi Wang,Feng Liu,Gongguo Zhang,Haifeng Zhang,Haiwen Zhang,Maochang Liu,Yiqun Zheng
Plasmonic semiconductor nanomaterials have been widely accepted as promising candidates for photothermal conversion, while the efficiency is yet to optimize. Herein, we report a facile synthesis of Au@Cu x O mesoporous nanospheres anchored with branched Ag nano-islands on the surface and explore their applications as photothermal conversion agent. Due to the intimate hybridization of two materials, the Au@Cu x O-Ag hybrid nanocomposites display a unique dual-plasmonic absorption that covers the visible-NIR range, benefiting the utilization efficiency of light energy . The synthesis is realized by reacting Au@Cu x O with Ag + , the galvanic replacement reaction between them enables a preferential depletion of Cu phase, leaving Ag and Cu 2 O as dominate crystal phases. The resulting hybrid nanocomposites are featured with a core-shell structure but incomplete coverage, as well as the mesoporous interior and dendritic outer shell. In addition to the enhanced photothermal conversion efficiency, the current nano-hybrids show excellent structural stability and no decay in conversion after five successive rounds of measurement. The advantages in both morphological and electronic structure aspects are discussed. The present study validates the promising synergetic use of distinct hot charge carriers originating from metal and semiconductor that are photoexcited in the same hybrid nanoparticle for photothermal conversion, shedding light on rational design of photothermal materials based on metal-semiconductor hybrid nanocomposites.
研究领域:
材料科学
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纳米技术
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光热转换
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高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2023
·Vol. 26
·期 11
·e202200640
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IF 2.3
Chen Wang,Nan Gao,Zhaoqing Gao,Ruofan Li,Yunpeng Wang,Weitao Gong
Graphical CuO/Cu glucose catalytic electrode is fabricated by copper anodization which can construct nanostructure in situ on copper substrates and regulate the chemical composition and morphology of the anodized films. The anodized CuO/Cu sample can be used as catalytic electrode directly and presents a high catalytic performance towards glucose oxidation. Potentiostatic anodization was developed to synthesize copper oxide/copper (Cu x O/Cu, x=1,2) electrode with nano structure for sensitive non-enzymatic glucose detection. At a catalytic potential of 0.55 V, the CuO/Cu electrode presented a high sensitivity of 2954.38 μA mM −1 cm −2 to glucose and a linear range of 0.1 mM to 1.3 mM. The response time is less than 3 s with addition of 0.1 mM glucose. The CuO/Cu electrode above was anodized in 1M KOH solution at −100 mV and the morphology was compact nanoparticles and sparsely dispersed nanosheets, which enlarged the surface area and provided abundant electrocatalytic active sites. Compared the sensing property of electrodes with different morphologies, it indicated that nanostructure was significant to the efficient glucose catalytic oxidation process and it could be regulated by changing the potential and electrolyte concentration during anodization.
研究领域:
生物化学
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材料科学
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高影响因子
RSC Advances
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2023
·Vol. 13
·期 51
·36477-36483
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IF 3.9
Jian Li,Renkun Huang,Lu Chen,Yuzhou Xia,Guiyang Yan,Ruwen Liang
The construction of heterojunctions has been used to optimize photocatalyst fuel denitrification. In this work, HKUST-1(Cu) was used as a sacrificial template to synthesize a composite material CuxO (CuO/Cu2O) that retains the original MOF framework for photocatalytic fuel denitrification by calcination at different temperatures. By adjusting the temperature, the content of CuO/Cu2O can be changed to control the performance and structure of CuxO-T effectively. The results show that CuxO-300 has the best photocatalytic performance, and its denitrification rate reaches 81% after 4 hours of visible light (≥420 nm) irradiation. Through the experimental analysis of pyridine's infrared and XPS spectra, we found that calcination produces CuxO-T mixed-valence metal oxide, which can create more exposed Lewis acid sites in the HKUST-1(Cu) framework. This leads to improved pyridine adsorption capabilities. The mixed-valence metal oxide forms a type II semiconductor heterojunction, which accelerates carrier separation and promotes photocatalytic activity for pyridine denitrification.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
Journal of Environmental Sciences
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2026
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IF 6.5
Jiaqi Ding,Xiaolin Xiong,Huanhuan Shi,Yuxiao Mu,Haojun Ji,Jingwen Wang
pH switches reactive species in ZVC/PAA: HO • at pH 3, Cu(III) at pH 7. • Surface Cu x O shell is the key site governing the generation of reactive species. • HO • -dominated system rapidly removes diverse sulfonamides with non-selectivity. • Cu(III) system selectively degrades sulfonamides containing heterocyclic rings. • ZVC demonstrates higher reusability and lower Cu ions leaching at pH 7. Zerovalent copper (ZVC) has garnered considerable attention in Fenton-like reactions, but the surface properties of ZVC that regulate reactive species (RSs) generation remain elusive. Herein, we systematically investigated the pH-dependent regulation of hydroxyl radical (HO • ) and high-valent copper (Cu(III)) generation during peracetic acid (PAA) activation by ZVC for the degradation of sulfonamide antibiotics (SAs). Characterization results revealed that ZVC has a core-shell structure, in which the surface copper oxide (Cu x O) layer serves as the primary active site. Theoretical and experimental analyses elucidated that pH modulates the surface properties of ZVC. At pH 3, the protonation of Cu x O promotes the generation of HO • in the ZVC/PAA system; conversely, under neutral conditions (pH 7.0), the unprotonated state favors the formation of Cu(III) as the dominant RSs. This trade-off between HO • and Cu(III) generation leads to distinct degradation performance for SAs degradation. HO • -dominated system achieved non-selective removal (>96 %) of various SAs; whereas the Cu(III) pathway selectively degraded SAs with heterocyclic rings at pH 7. The Cu(III) pathway outperformed the HO • system in terms of humic acid tolerance and catalyst recyclability in the ZVC/PAA process. This work clarifies the decisive role of surface protonation of ZVC in steering HO • versus Cu(III) pathways and provides a theoretical basis for designing pH‑specific Fenton-like reaction processes. Download: Download high-res image (355KB) Download: Download full-size image
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高影响因子
ELECTROCHIMICA ACTA
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2026
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IF 5.8
Xiaoyan Ma,Qixian Xu,Kejin Zhou,Hailong Xu,Kunming Wei,Su Jiang,Jing Deng,Qingsong Li,Xueyan Li,Stefanos Giannakis
Haloacetic acids (HAAs), which are characterized by their persistence in tap water, are major contributors to the carcinogenic risk posed by disinfection byproducts (DBPs). This study introduces a Pd/Cu x O porous carbon composite electrode, synthesized via a metal-doping modulation strategy and immobilized on a steel electrode for the electrocatalytic dechlorination of trichloroacetic acid (TCAA). The Pd/Cu x O/St electrode demonstrated outstanding dechlorination efficiency, achieving up to 95.2% TCAA removal, surpassing that of other experimental transition metals. Material characterization confirmed the successful formation of a Pd-Cu x O heterostructure on the Pd/Cu x O/St composite electrode. Electrochemical analysis revealed that the optimized Pd/Cu x O/St system displayed a significantly higher current density and enhanced reaction kinetics than their undoped counterparts. The optimal mass ratio of Pd/Cu x O for doping was determined to be 0.075:1, achieving TCAA removal efficiency of 95.2%. Our Pd/Cu x O/St electrode combined rapid kinetics, dual-pathway mechanisms, and metal-doping synergy to efficiently convert the persistent and toxic DBPs into harmless products. Quenching experiments with tert-butanol and EDTA-2Na identified atomic hydrogen (H*), Cu, and Pd ions as the dominant active species, leading to the conversion of TCAA to less toxic acetic acid. This work not only advances TCAA dechlorination technology but also provides vital insights for developing effective end-of-pipe treatments for DBPs, a significant step towards safer drinking water.
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高影响因子
Nature Communications
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2024
·Vol. 15
·期 1
·1-11
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IF 14.7
Feng Chao,Liu Zhi,Ju Huanxin,Mavrič Andraž,Valant Matjaz,Fu Jie,Zhang Beibei,Li Yanbo
The buried interface tens of nanometers beneath the solid-liquid junction is crucial for photocarrier extraction, influencing the overall efficiency of photoelectrochemical devices. Precise characterization of the interfacial properties is essential for device optimization but remains challenging. Here, we directly probe the in situ transformation of a Cu x O interlayer at the NiO/n-Si interface by hard X-ray photoelectron spectroscopy. It is found that Cu(I) in the Cu x O interlayer gradually transforms to Cu(II) with air exposure, forming an energetically more favorable interface and improving photoanode’s efficiency. Based on this finding, a reactive e-beam evaporation process is developed for the direct deposition of a CuO interlayer, achieving a half-cell solar-to-hydrogen efficiency of 4.56% for the optimized NiO/CuO/n-Si heterojunction photoanode. Our results highlight the importance of precision characterization of interfacial properties with advanced hard X-ray photoelectron spectroscopy in guiding the design of efficient solar water-splitting devices.
研究领域:
材料科学
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表面科学
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可再生能源
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jiayao Luo,Ji Zhang,Jie Chen,Shan Xiong,Yifan Li,Xinyu Li,Lu Fan
The large-scale accumulation of red mud, a waste by-product from aluminum production, presents critical environmental challenges and opportunities for resource valorization. In this study, a Cu x O/RM composite was synthesized via wetness impregnation and applied for rapid and selective NO 3 − -N reduction. Complete NO 3 − -N removal was achieved within 9 min under mild conditions (25 °C, initial pH 7.0, 30 mg(N)/L), with NO 2 − -N as the primary intermediate. With addition of NH 2 SO 3 H, NO 2 − -N was further reduced to N 2 gas within 3 min. Notably, the Cu x O/RM system maintained high NO 3 − -N removal efficiency even at lower temperatures (5–15 °C) and across a wide pH range (3−11), demonstrating excellent adaptability to real-world wastewater conditions. Stability and reusability tests showed that the composite retained over 95 % removal efficiency after five reuse cycles. Mechanistic investigations revealed that in-situ generated Cu 0 and H 2 -mediated pathways synergistically enhanced NO 3 − -N reduction performance. This study not only provides an effective and sustainable strategy for NO 3 − -N remediation but also offers a promising route for the large-scale valorization of red mud.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Xinyu Li,Xiaobo Min,Xiaoxian Hu,Zhi Jiang,Chaofang Li,Weichun Yang,Feiping Zhao
Copper-mediated activation of persulfate (PS) has been widely investigated for the degradation of refractory organic pollutants . However, the dispersion of the active copper sites in the catalysts remains a great challenge. Herein, a series of well-dispersed Cu-Cu x O embedded into carbon matrix composites (Cu-Cu x O@C) were fabricated via the pyrolysis of HKUST-1 precursor. The Cu-Cu x O@C catalysts were fully characterized by SEM, HRTEM, XRD, BET, Raman, FT-IR, and XPS. The results show that the Cu-Cu x O@C calcinated at 700 °C (Cu-Cu x O@C-700) contained multivalent Cu components. Their heterogeneous activation of PS for phenol degradation was also investigated. Cu-Cu x O@C-700 removed completely phenol with a k obs value greater than 0.40 min −1 . Such superior catalytic activity is mainly attributed to the synergistic effect of carbon matrix adsorption and multivalent Cu active site electron transfer. The reusability studies reveal that the performance of the used Cu-Cu x O@C-700 could be reactivated through re-calcination. Moreover, quenching tests and EPR analyses revealed that OH and SO 4 − are involved in phenol degradation. The electron transfer process and resistance of Cu-Cu x O@C-700 were described by electrochemical method. Finally, the catalytic mechanism was explored by XPS, FT-IR and Raman analyses. This study provides new insights into the fabrication of heterogeneous catalysts for sulfate radical activiation.
研究领域:
环境科学
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材料科学
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高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Xianni Song,Junhua Zhang
Polyvinyl alcohol (PVA) is a kind of refractory organic polymer with high COD and low BOD. Efficient treatment of PVA wastewater has always been a challenging subject especially for ultra-high concentration (UHC). In this paper, based on our previous work, a sequential combination process method including NaClO chain breakage followed by Cu x O activated carbon catalytic oxidation was developed to efficient treat UHC PVA wastewater. The sequential combination system was optimized by monitoring the treatment performance with different key parameters (such as oxidant dosage, Cu loading and catalyst dosage, two-stage reaction time, pH value, etc.). And the COD of PVA wastewater declined from the initial 206,240.00 mg/L to 557.78 mg/L (removal rate 99.73 %), the PVA concentration decreased from the initial 171,325.00 mg/L to 19.94 mg/L (removal rate 99.99 %) under the optimal conditions. Through the discussion of the combined processes, it was found that both chain breakage and catalytic oxidation were necessary and indispensable to achieve efficient degradation of PVA wastewater. Additionally, the free radical scavenging experiments show that the combined oxidation process was mainly controlled by the catalytic oxidation process, and followed the free radical reaction mechanism with·OH as the main oxidant. Based on this, it is recommended that subsequent researchers focus on the combined process for the treat of refractory organic wastewater.
研究领域:
环境科学
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化学工程
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高影响因子
DIAMOND AND RELATED MATERIALS
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2025
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IF 5.1
Shuo Yang,Yukun Li,Yingying Fu,Mingjia Dong,Cong Chao,Sen Yao,Qiqian Huang,Shuying Dong
The primary objective of this research was to develop an efficient and stable material capable of both photocatalysis and persulfate (PDS) activation for the degradation of tetracycline (TC). To this end, a composite material, g-C 3 N 4 /Cu x O/GA (CNCuGA), was synthesized via an optimized hydrothermal assembly method. The physicochemical, microstructural, and photoelectric properties were systematically characterized, establishing a CNCuGA/SSL/PDS system to evaluate key parameters (doping rate, catalyst amount, PDS and TC concentrations, initial pH, and co-existing components) on TC degradation under simulated sunlight. Under optimal conditions (15 % doping ratio, 0.2 g·L −1 catalyst, 20 mg·L −1 PDS and 20 mg·L −1 TC), the CNCuGA-3/SSL/PDS system achieved 93.6 % (0.04223 min −1 ) TC removal within 60 min, surpassing the GA/SSL/PDS system (55.4 %, 0.00922 min −1 ) by a factor of 4.58. Mechanistic studies indicated that the enhanced performance originated from accelerated photogenerated electron transfer and prolonged electron lifetime, which promoted reactive species generation, along with the critical role of the Cu(I)/Cu(II) redox cycle in enabling persistent PDS activation. CNCuGA-3 also exhibited excellent recyclability over five cycles, with minimal metal leaching, while the treated solution showed high mineralization efficiency and low biological toxicity. These results collectively demonstrated the promise of CNCuGA-3 as a durable and effective catalyst for solar-driven antibiotic wastewater treatment.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
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IF 4.598
Wei Zhong,Jin Zou,Yanyu Xie,Jing Yang,Mingfang Li,Shuwu Liu,Yansha Gao,Xiaoqiang Wang,Limin Lu
Herein, a highly sensitive and selective electrochemical sensor for the detection of benomyl (BN), a typical benzimidazole fungicide was proposed based on hierarchical nano-Cu x O decorated MWCNTs-COOH/MXene (nano-Cu x O-MWCNTs-COOH /MXene) composite. The ternary heterostructure presents good electrical conductivity, large specific surface area, and high catalytic activity, exhibiting excellent electrocatalytic activity with enhanced electrochemical signals towards the oxidation of BN. Besides, the embedded nano-Cu x O particles possess strong affinity toward benzimidazole molecules, which could promote the preconcentration of BN, further enhancing the sensitivity, as well as ensuring the high selectivity. Benefitting from the synergistic effect of components in the composite, the developed sensor presents a broad linear range from 10.0 nM to 10.0 μM with a low limit of detection of 3.0 nM (S/N = 3). Meanwhile, the nano-Cu x O-MWCNTs-COOH/MXene electrode also displays good long-term stability and repeatability. Furthermore, this method was successfully applied for the detection of BN in apple samples, illustrating its promising practicability.
研究领域:
分析化学
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环境科学
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食品科学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Lu Gao,Yue Zhou,Lulu Li,Lin Chen,Luwei Peng,Jinli Qiao,Feng F. Hong
A CNT/Bacterial Cellulose (BC) nanocomposite with a large surface area and conductive properties was in-situ cultivated to retain the native 3D nanofibril network. The Cu-Cu x O/CNT/BC nanocomposite electrode was in-situ fabricated via reduction with the CNT/BC composite as a support, comparing KBH 4 and NaBH 4 as a reducing agent to obtain efficient electrodes for CO 2 reduction (ECR-CO 2 ). Both electrodes exhibited higher performance than the traditional carbon cloth or pristine BC supported Cu-based catalysts for conversion of ECR-CO 2 to CO and C 2 H 4 . The CNT/BC as a support provided not only more active sites for copper catalyst but also increased the charge transfer and selective performance of C 2 H 4 product, due to the synergistic effect of CNT and copper. The smaller honeycomb and dendritic lamellar crystal morphology of the obtained Cu-Cu x O/CNT/BC NaBH4 electrode possessed a large electrochemical specific surface area, providing more active sites for ECR-CO 2 . The double-layer capacitance and the current density reached 11.8 mF cm −2 and 33.3 mA cm −2 , respectively. At a potential of −1.5 V RHE , the Faraday efficiency (FE CO + FE C2H4 ) was 66%. Moreover, the Cu-Cu x O/CNT/BC nanocomposite electrode was very stable, and withstood tolerance in ECR-CO 2 for more than 20 h. This study possibly will provide a new design for catalyst support on CNT/BC substrate to regulate advanced catalysts/electrodes for different applications, especially to ECR-CO 2 in terms of higher charge transport properties, lower contact resistance, higher current density, and more stable CO 2 electroreduction performance.
研究领域:
材料科学
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电化学
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环境科学
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高影响因子
危险品化学品经营许可证（带存储）