MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Xiaoying Lu,Fang Deng,Min Liu,Xubiao Luo,Aijie Wang
CuInS 2 semiconductor were synthesized by regulating Cu/In molar ratio via a hot solvent method. Different Cu/In molar ratio in reaction system had significant influence on the BET surface area , charge separation and photocatalytic activity of CuInS 2 . The CuInS 2 with optimal Cu/In ratio of 1:1.5 exhibits the most efficient charge separation and transfer, leading to the highest photocatalytic activity . The mineralization efficiency of pharmaceutical wastewater by CuInS 2 (Cu:In = 1:1.5) was 67.5% in 6 h, and CuInS 2 (Cu:In = 1:1.5) exhibited high stability, indicating that CuInS 2 has a promising prospect in real pharmaceutical wastewater treatment .
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 46
·e202404170
·
IF 1.9
Pengtao Sheng,Haiyan Xu,Yaqi Zhang,Haiyue Xia,Haipeng Liu,Weili Li
Graphical We present a surfactant-associated controlled synthesis of copper (Cu)-deficient zinc (Zn)-doped Cu-indium (In)-selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems. The shape and size-controlled synthesis of colloidal I−III−VI quantum dots (QDs) can be attained only by a few synthesis strategies via the introduction of various high-boiling-point organic surfactants. To further investigate this strategy, in this study, we present a surfactant-associated controlled synthesis of copper (Cu)-deficient, zinc (Zn)-doped Cu─indium (In)─selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants, such as oleylamine (OLA), oleic acid (OA), and diphenylphosphine (DPP). OLA significantly promoted the quantum size effect-resultant emission wavelength red-shift, while OA controlled the homogeneous growth of QDs and improved the quantum yields. Moreover, Gaussian deconvolution of the photoluminescence spectra and the bandgap derived from the absorption spectra, by fitting, supported the fact that the radiative transition channels, especially for surface-trap-state-related transitions, are also dependent on the surfactants. Specifically, the conduction band electron-intragap state transitions and donor-acceptor transitions were present in all the prepared samples but accounted for different percentages. Furthermore, the surface-trap-state-related transitions significantly faded upon adding (i) OLA/OA as the sole surfactant to the cationic precursor and (ii) the OA + OLA + DPP mixture to the anionic precursor. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yi Zhou,Peike Cao,Shuo Chen,Hongtao Yu,Xie Quan
Selectively converting carbon dioxide (CO 2 ) to ethanol via photocatalysis offers a sustainable means of storing solar energy in chemical bonds. However, its efficiency is limited by an inadequate proton supply from water oxidation to drive the carbon‑carbon (C C) coupling step. This inefficiency leads to poor ethanol selectivity and promotes a competing hydrogen evolution side reaction, ultimately restricting overall system performance. Here, we designed a ternary In(OH) 3 -Cu 2 O/PCN heterojunction as a functionally partitioned catalyst: Polymeric carbon nitride (PCN) acts as the photoelectron donor, cuprous oxide (Cu 2 O) acts as the CO 2 reduction center, and trace indium hydroxide (In(OH) 3 ) is dedicated to water oxidation. Density Functional Theory (DFT) calculations reveal that water dissociation on In(OH) 3 generates active hydrogen species (*H), which are subsequently transferred to adjacent Cu sites with a low migration barrier. This interfacial proton relay mechanism avoids the accumulation of high-energy *H intermediates on the active sites, which suppresses the competing hydrogen evolution reaction. Correspondingly, the energy barrier for the crucial adsorbed carbon monoxide (*CO) dimerization step is lowered from 0.93 eV to 0.78 eV. The catalyst demonstrates superior activity to most documented photocatalysts for CO 2 -to-ethanol conversion, operating under sacrificial agent-free conditions, achieving an ethanol production rate of 125.4 ± 5.1 μmol g −1 h −1 and a selectivity of 90.4% ± 2.8%. These findings highlight the promise of functionally partitioned architectures in steering complex multi-step photocatalytic transformations toward valuable multi‑carbon products.
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DOI
PubMed
高影响因子
Solar RRL
·
2026
·Vol. 10
·期 1
·e202500927
·
IF 4.7
Yu Li,Guo Lu,Jieyu Zheng,Jie Chen,Shuaibing Wang,Mengmeng Ma,Zhijie Wang,Aiwei Tang
Ensuring broad-spectrum visible-light absorption and efficient electron extraction is essential for enhancing the efficiency of photocatalytic hydrogen production. To achieve this, manipulating carrier dynamics through cocatalyst heterojunction engineering has attracted considerable concern. However, conventional narrow-bandgap Cu–In–Zn–S (CIZS) nanocrystals (NCs) typically exhibit limited photocatalytic activity due to severe exciton annihilation. Herein, two-dimensional (2D) CIZS nanobelts (NBs) were coupled with Ni 9 S 8 cocatalyst to construct a library of CIZS/Ni 9 S 8 Schottky heterojunctions synthesized via a combined colloidal one-pot and hot-injection strategy. As anticipated, the CIZS/2.0%Ni 9 S 8 heterojunction displayed the optimal photocatalytic hydrogen evolution activity of 2.75 mmol g −1 h −1 , ≈3.31 times higher than that of pristine CIZS NBs (0.83 mmol g −1 h −1 ). Experimental results uncovered that the enhanced photocatalytic performance originated from the formation of the CIZS/2.0%Ni 9 S 8 Schottky heterojunction, which facilitated efficient charge transfer from CIZS NBs to Ni 9 S 8 and hindered the return of electrons. Moreover, Ni 9 S 8 serves as active catalytic sites, significantly accelerating surface proton reduction reactions. This study provides valuable insights into the rational design and precise synthesis of colloidal multinary Cu-based chalcogenide heterojunctions for efficient photocatalytic energy conversion.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jinlian Bi,Jianping Ao,Qing Gao,Zhaojing Zhang,Guozhong Sun,Qing He,Zhiqiang Zhou,Yun Sun,Yi Zhang
Electrodepositon of Ga film is very challenging due to the high standard reduction potential (−0.53 V vs SHE for Ga3+). In this study, Ga film with compact structure was successfully deposited on the Mo/Cu/In substrate by the pulse current electrodeposition (PCE) method using GaCl3 aqueous solution. A high deposition rate of Ga3+ and H+ can be achieved by applying a large overpotential induced by high pulse current. In the meanwhile, the concentration polarization induced by cation depletion can be minimized by changing the pulse frequency and duty cycle. Uniform and smooth Ga film was fabricated at high deposition rate with pulse current density 125 mA/cm2, pulse frequency 5 Hz, and duty cycle 0.25. Ga film was then selenized together with electrodeposited Cu and In films to make a CIGSe absorber film for solar cells. The solar cell based on the Ga film presents conversion efficiency of 11.04%, fill factor of 63.40%, and Voc of 505 mV, which is much better than those based on the inhomogeneous and rough Ga film prepared by the DCE method, indicating the pulse current electrodeposition process is promising for the fabrication of CIGSe solar cell.
研究领域:
材料科学
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电化学
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光伏技术
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薄膜技术
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Bing Xu,Feiyang Huang,Zhihui Luo,Changyan Ran
A compact optical fiber sensor based on a no-core fiber (NCF) segment functionalized with a Cu²⁺-imprinted chitosan/polyvinyl alcohol (CS/PVA) film was developed to enable operando on-line monitoring of Cu²⁺ with high selectivity and sensitivity in complex environmental water matrices. The optimal length of the NCF segment was determined to be 1 cm based on simulation and experimental evaluation, under which the highest sensitivity was achieved. The pseudo-second-order kinetic behavior of Cu²⁺ adsorption was first validated by analyzing the time-dependent shift of the interference valley, providing direct spectral evidence of a chemisorption-driven mechanism. A sensitivity of 0.0768 nm/μM and a detection limit of 0.1245 μM were obtained. A rapid response time of less than 20 s and excellent measurement repeatability, with strong specificity toward the target ion and relative standard deviation below 5 percent over five regeneration cycles, were also demonstrated. The sensor was further applied to spiked water samples from the Yangtze River and tap water. By integrating ion-imprinting technology with an optimized NCF-based fiber structure, a portable, cost-effective, and interference-resistant platform has been established for real-time and on-site monitoring of heavy metal ions in complex aquatic environments.
研究领域:
环境分析化学
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光学传感
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重金属检测
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功能材料
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水环境监测
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Kejing Wang,Yongjun Liu,Zhiwen Li,Nan Cui,Lei Sun,Wei Huang
The valence states of Cu site are regarded as an important factor affecting the performance of syngas to higher alcohols (C 2+ OH). Regrettably, the role of Cu 0 and Cu + in CO hydrogenation to higher alcohols remains controversial due to the complexity of the reaction. In this study, Cu 0 and Cu 2 O powders are directly added as the precursors to adjust the ratios of Cu + /(Cu 0 +Cu + ) and Cu particle sizes in CuZnAl catalysts by a complete liquid-phase (CLP) technology. The CAT-Cu 0 catalyst with higher Cu 0 content shows the highest CO conversion (>15%) ascribing to the biggest S Cu , but is also accompanied by the highest CO 2 selectivity (>40%), while the CAT-Cu + catalysts with higher Cu + content displays relative better C 2+ OH selectivity (>60%) and stability due to a higher probability of CO insertion. In-situ DRIFTS experiments reveal that a synergy between larger Cu particle sizes (30～40 nm) and surface Cu + sites, in which larger Cu sizes enhances the probability of bridge CO adsorption, thereby favoring the C–O bond dissociation for CH x formation. Meanwhile, Cu + active sites provide a higher probability for CO/CHO insertion to form CH 3 CHO*/CH 2 CO* intermediates. This study further deepens our understanding of the critical controlling factors for highly selective synthesis of C 2+ OH from syngas over Cu-based catalysts.
研究领域:
化学工程
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催化
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jiaqi Yang,Kexuan Gao,Yiran Chai,Nigel J.D. Graham,Li-an Hou,Yu Yang
The development of multifunctional catalytic membranes that concurrently enable rapid contaminant degradation, antifouling resistance, and long-term operational stability remains a critical challenge in advanced water treatment. Here, we describe the preparation and testing of a rationally engineered bimetallic CoCu catalyst, anchored onto graphitic carbon nitride (g-C 3 N 4 ) via a glucose-mediated cascade anchoring method (CoCu-CN), and immobilized on to an alumina ceramic membrane (CoCu-CN/M). Atomic-level characterizations revealed the coexistence of surface Co N 4 species and bulk Co Co coordination, and the electron-donating effect of Cu species stabilizes Co in an absolutely reduced state (Co 0 /Co-N 4 ). This bimetallic configuration optimized the peroxymonosulfate (PMS) adsorption configuration ( E ads = −3.05 eV) and facilitated O O oxygen bond cleavage ( I O O = 1.477 Å), thereby accelerating the generation of reactive oxygen species, including SO 4 − , O 2 − , and 1 O 2 . Consequently, the CoCu-CN system achieved complete degradation of a target pollutant carbamazepine (CBZ), with a reaction rate constant (k obs ) of 0.755 min −1 , corresponding to 158.9-fold and 3.23-fold enhancements compared to the monometallic Cu-CN and Co-CN systems, respectively. The CoCu-CN/M membrane demonstrated a high permeability (404.72 LMH/bar), sustained >98% CBZ removal over seven cycles, and exhibited strong antifouling performance. In surface water, the novel membrane maintained >95% degradation efficiency over 72 h of continuous operation, confirming its long-term stability. This study provides atomic-level insights into bimetallic catalytic activation and proposes an effective membrane-based solution for advanced water treatment.
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DOI
高影响因子
Nano Research
·
2018
·Vol. 11
·期 3
·1379-1388
·
IF 7.994
Liu Xiao-Yuan,Zhang Guozhen,Chen Hao,Li Haowen,Jiang Jun,Long Yi-Tao,Ning Zhijun
The development of photocatalysts that can effectively harvest visible light is essential for advances in high-efficiency solar-driven hydrogen generation. Herein, we synthesized water soluble CuInS 2 (CIS) and Cu-In-Zn-S (CIZS) quantum dots (QDs) by using one-pot aqueous method. The CIZS QDs are well passivated by glutathione ligands and are highly stable in aqueous conditions. We subsequently applied these QDs as a light harvesting material for photocatalytic hydrogen generation. Unlike most small band gap materials that show extremely low efficiency, these new QDs display remarkable energy conversion efficiency in the visible and near-infrared regions. The external quantum efficiency at 650 nm is ∼1.5%, which, to the best of our knowledge, is the highest value achieved until now in the near-infrared region.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Yaqing Hu,Mingxia Zhou,Kunyu Xu,Zihao Yang,Zhaoxia Dong
The electroreduction of carbon dioxide to multi-carbon products (C 2+ ) represents an effective pathway for achieving carbon cycling and high-density renewable energy storage. However, its practical implementation is challenged by excessively high C–C coupling reaction energy barriers and competitive hydrogen evolution reaction (HER). Modifications to the local microenvironment play a decisive role in the three-phase interface reaction of CO 2 electrocatalytic reduction. Therefore, this study employed an Al 2 O 3 -modified copper catalyst (Al 2 O 3 /Cu) to modulate the local reaction microenvironment, thereby promoting C 2+ formation. Notably, the optimized Al 2 O 3 /Cu catalyst achieved a remarkable C 2+ Faraday efficiency (FE) of 71.3% at −1.33 V vs. RHE (reversible hydrogen electrode; all potentials herein are referenced to RHE) in a neutral electrolyte using a flow cell, significantly outperforming unmodified Cu catalysts. This catalyst also demonstrated excellent catalytic stability, exceeding 56 h. Theoretical calculations and in situ spectroscopic characterization confirmed that introduced Al 2 O 3 species kinetically facilitate water dissociation and proton consumption, which is crucial for maintaining a transient localized high-pH environment under operating conditions. This alkaline microenvironment not only suppresses the HER but also stabilizes the critical Cu 2+ /Cu + active sites against over-reduction, while simultaneously lowering the energy barrier of C–C coupling reactions. This work underscores the critical role of dynamically modulating the localized chemical environment in neutral electrolytes for CO 2 reduction reactions (CO 2 RR), offering novel insights for designing such microenvironments.
研究领域:
电催化
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二氧化碳利用
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可再生能源存储
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材料化学
·
可持续化学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Jinlian Bi,Liyong Yao,Jianping Ao,Shoushuai Gao,Guozhong Sun,Qing He,Zhiqiang Zhou,Yun Sun,Yi Zhang
The issues of rough surface morphology and the incorporated additives of the electro-deposited Cu layers, which exists in electrodeposition-based processes, is one of the major obstacles to improve the efficiency of Cu(In,Ga)Se 2 (CIGSe) and Cu 2 ZnSnSe 4 (CZTSe) solar cells. In this study, the pulse current electro-deposition method is employed to deposit smooth Cu film on Mo substrate in CuSO 4 solution without any additives. Grain size of the deposited Cu film is decreased by high cathode polarization successfully. And the concentration polarization , which results from high pulse current density, is controlled successfully by adjusting the pulse frequency. Flat Cu film with smooth surface and compact structure is deposited as pulse current density @ 62.5 mA cm −2 , pulse frequency @100,000 Hz, and duty cycle @ 25%. CIGSe and CZTSe absorber films with flat surface and uniform elemental distribution are prepared by selenizing the stacking metal layers electro-deposited by pulse current method. Finally, the CIGSe and CZTSe solar cells with conversion efficiency of 10.39% and 7.83% respectively are fabricated based on the smooth Cu films, which are better than the solar cells fabricated by the rough Cu film deposited by direct current electro-deposition method.
研究领域:
材料科学
·
可再生能源
·
电化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 27
·10585-10592
·
IF 8.262
Hang Zhang,Guanhua Zhang,Zhiqin Li,Ke Qu,Lei Wang,Wei Zeng,Qingfeng Zhang,Huigao Duan
Developing advanced anode materials is crucial to further enhance the performance of lithium-ion batteries for electrochemical energy storage. Metal oxides embedded in a carbonaceous matrix are supposed to be promising candidates as anode materials due to their high specific capacity and excellent stability. Herein, we report a CuO/Cu-based carbonaceous nanocomposite system which was used as an anode material for high-performance lithium-ion batteries via an efficient synergistic effect. With an improved fabrication strategy, the CuO/Cu could be ultra-uniformly dispersed in nitrogen-doped carbon nanofibers. Benefiting from the in situ pyrolysis of Cu salts with improved structural stability and conductivity, the hybrid nanofiber electrode showed a specific capacity of 572.0 mA h g−1 and steady cycling performance over 500 cycles at a constant current density of 0.5 A g−1.
研究领域:
材料科学
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能源存储
·
纳米技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）