APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zhong-yi Wang,Rui-tang Guo,Xu Shi,Wei-guo Pan,Jian Liu,Xiao Sun,Shuai-wei Liu,Xing-yu Liu,Hao Qin
The Cu/TiO 2 catalysts modified by Sb were compounded through the sol-gel way and put into use for the selective catalytic reduction (SCR) of NOx with NH 3 . Experimental results suggested that CuSb/TiO 2 -0.4 exhibited the excellent NOx conversion and SO 2 tolerance. Subsequently, the relationship between surface physicochemical properties and catalytic performance was also investigated by different characterization methods. From characterizations, the introduction of Sb for Cu/TiO 2 could promote the generation of more Cu 2+ , surface adsorbed oxygen species and surface acid sites on CuSb/TiO 2 -0.4 catalyst. Furthermore, Sb species on CuSb/TiO 2 -0.4 could contribute to the formation of more surface ad-NOx and ad-NH 3 species, which would enhance the NH 3 -SCR process effectively through both the Langmuir-Hinshelwood (L-H) and Eley-Rideal (E-R) mechanisms.
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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.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Zhan Shu,Cencen Zhang,Lizhao Yan,Haoqi Lei,Caixing Peng,Shuang Liu,Lihong Fan,Yingying Chu
Repair of periodontal and maxillofacial bone defects is a major challenge in clinical. Guided bone regeneration (GBR) is considered one of the most effective methods. However, the efficacy of currently available GBR membranes for repair is frequently limited by their poor osteogenic potential and lack of antibacterial activity. The first step in this investigation was to construct a zinc-based zeolite-imidazolate framework loaded with copper ions ( [email protected] ). Following that, a novel polycaprolactone/polylactic acid/nano-hydroxyapatite/ [email protected] (PCL/PLA/n-HA/ [email protected] ) GBR membrane was developed using a simple porogen with nonsolvent-induced phase separation (NIPS) approach. The produced membrane with asymmetric porous structure (one smooth side and one rough side) possesses hydrophilicity corresponding to the roughness of its two sides. The superior mechanical property, stability of degradation, and ion release capability of the membrane all contribute to the clinical feasibility. Additionally, in vitro biological experiments demonstrated that the PCL/PLA/n-HA/ [email protected] membrane had favorable osteogenic and antibacterial properties, which suggests the high potential for application in the GBR procedure.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Jiahang Liu,Jian He,Pan Wu,Chao Yang,Wei Jiang
The preparation of superhydrophobic metal surfaces by one-step immersion in fatty acid solutions is simple and convenient, but the effect of the fatty acid type has not been investigated. In this work, Cu meshes were soaked in ethanol solutions of fatty acids with different carbon chain lengths to obtain surfaces with different wettabilities , which varied from superhydrophilicity to superhydrophobicity. The results showed that the contact angle of the surfaces gradually increased from 2.7 ° for the sample prepared with formic acid to 151.8 ° for the sample prepared with myristic acid. The maximum apparent surface energy and solubility parameter were 82.33 mN/m and 65.79 J 1/2 /cm 3/2 for the C 1 -Cu surface, and the lowest were only 6.3 mN/m and 19.91 J 1/2 /cm 3/2 , respectively, for C 14 -Cu. A simulation confirmed that as the carbon chain length of the fatty acid increased, the solubility parameter decreased, and the hydrophobicity increased. One-step immersion enables facile, inexpensive one-step preparation of membrane surfaces with controllable superhydrophobicity for large-scale industrial applications.
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PROCESS BIOCHEMISTRY
·
2022
·
IF 4.885
Jinmao Ma,Dongrun Wang,Wei Zhang,Xiangyu Wang,Xia Ma,Minsheng Liu,Quanlin Zhao,Lincheng Zhou,Sanxiang Sun,Zhengfang Ye
The host–guest β-cyclodextrin has attracted much attention for potential application in various fields due to its low price, natural pores, and functionality. Herein, we report a method using 1,4-phenylene diisocyanate (PPDI) to fabricate β-cyclodextrin (CD)-modified poly(chloromethyl styrene) (PCMS) resin, namely, PCMS@PPDI-CD. β-Cyclodextrin was utilized to improve the adsorption performance of PCMS, which was then applied to anchor β-cyclodextrin powder. The product exhibits excellent renewability and availability due to the application of PCMS. The adsorption performance was fully exerted by the combination of β-cyclodextrin and PCMS. SEM mapping, FTIR, TG , BET, and XPS analyses were conducted to explore the morphological and structural properties of PCMS@PPDI-CD. Adsorption experiments show that PCMS@PPDI-CD removed 100 % of TC and 75 % of Cu(Ⅱ), and the maximum adsorption capacity for Cu(Ⅱ) and TC reached 187.6 and 266.4 mg g −1 , respectively. After recycling six times, the adsorption ability of Cu(Ⅱ) and TC still achieved excellent removal performance. In addition, the chelation of the lone N pair, the hydrophobicity of the cavity, H-bonding, complexation, n-π interaction, and porous structure showed the possible mechanism. We used computational formulas to simulate the adsorption state and found that the resin is theoretically feasible. Most importantly, we propose a novel application of PCMS@PPDI-CD. This work shows that the resulting PCMS@PPDI-CD is highly efficient and can be easily recycled, making it an attractive resin for adsorption.
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JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Zhiwei Yang,Yiwen Luo,Jiapeng Yue,Xinyu Wang,Hao Xu,Qian Ye,Yujian Zhang,Xinyi Xing,Qingguo Wang,Jing Zhang
This study proposes a method to activate O 2 by accelerating the corrosion process for zero-valent zinc (ZVZ) with the assistance of Cu(II), promoting the consecutive production of reactive oxygen species . The mechanisms for reactive oxygen species generation are clarified with metronidazole (MTZ) as the targeted pollutant. The outcome suggests the association of Cu(Ⅱ) and ZVZ presents an apparent cooperative activity, an enhancement of 85% in MTZ removal is attained for the ZVZ/Cu(Ⅱ) system after 10 min compared to that for ZVZ. Analysis of the mechanisms involved indicates that this improvement is due to the addition of Cu(Ⅱ), which can accelerate the corrosion of ZVZ. In addition, quenching experiments and electron paramagnetic resonance (EPR) technology show that superoxide radicals (·O 2 − ) result in rapid MTZ degradation. The primary component that is liable for O 2 activation and a certain amount of H 2 O 2 generation is verified to be ZVZ. Moreover, Cu(I) is detected in the ZVZ/Cu(Ⅱ) system, which arises from a direct reduction pathway driven by ZVZ and an indirect reduction pathway driven by active hydrogen atoms .
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高影响因子
TALANTA
·
2021
·
IF 6.057
Chang Ping Yang,Qing Wu,Zhong Wei Jiang,Xue Wang,Cheng Zhi Huang,Yuan Fang Li
Defect engineering in the photoelectrochemical (PEC) process of photoelectrodes has been extensively studied. But insufficient attention has been received about the impact of metal vacancies (V M ) in PEC process. Herein, the influence of Cu vacancies (V Cu ) on PEC performance of copper oxide (CuO) derived from Cu-based metal-organic gel (Cu-MOG) precursor was reported. It can be found that the presence of more V Cu can improve the PEC activity of CuO photocathode by facilitating the charge separation and transfer. Moreover, the as-prepared CuO was presented as a new PEC sensor to detect l -cysteine (L-Cys) on the basis of the excellent PEC performance, which showed high sensitivity and selectivity. Good linear response of L-Cys within the range of 0.1–6 μM was performed with a detection limit of 0.04 μM. This work not only provides insights into the role of V M in the PEC process of photocathodes, but also proved the high potential applicability of CuO as a PEC device for biomolecule detection.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Xianfeng Wang,Chengxiang Chu,Jiayi Lv,Yuanyuan Jia,Libo Lin,Mei Yang,Suyi Zhang,Danqun Huo,Changjun Hou
High-performance analysis of heavy metal ions is great importance in both environment and food safety. In this work, a facile and reliable colorimetric sensor was presented for simultaneous detection of Cu 2+ and Cr 3+ based on indicator-displacement assay (IDA). As a typical silicate nanomaterials , ZnSiO 3 hollow nanosphere (ZSHS) exhibited an outstanding ion exchange capacity. Zincon was incorporated with the ZSHS to form a zincon/ZSHS hybrid ionophore with a blue color. Upon the addition of Cr 3+ , IDA reaction and selective ion exchange occurred with the color change of zincon/ZSHS ionophore from blue to yellow. With such a design, colorimetric measurement of Cr 3+ was realized. The linear concentration for Cr 3+ detection ranged from 0.5 μM to 75 μM with the LOD of 83.2 nM. Furthermore, we also screened different kinds of complexing agents that may respond with zincon/ZSHS ionophore and various metal ions. It was found that tartaric acid (TA) showed the chelation capability of Zn 2+ -TA is stronger than that of Zn 2+ -zincon. Thus zincon/ZSHS/TA presented a yellow color due to the chelation reaction of Zn 2+ -TA, releasing the zincon as a free state. After addition of Cu 2+ , a stronger chelation reaction of Cu 2+ -zincon occurred. This process involved in the color change from yellow to blue and realized colorimetric measurement of Cu 2+ . The detection limit of Cu 2+ was calculated to be 43.7 nM with linear range from 0.1 to 20 μM. In addition, the zincon/ZSHS nanoprobe was successfully applied for simultaneous measurement of Cu 2+ and Cr 3+ in sorghum and river water, indicating that the zincon/ZSHS nanoprobe provided a promising sensing platform in environment and food safety.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 8
·087511
·
IF 4.386
Wensi Xu,Xiansen He,Xiaokun Li,Suxiang Feng
In this study, a novel electrochemical sensor was designed to detect luteolin (Lu) with the composite of gold nanoparticles and nickel phthalocyanine-based 2D conductive metal-organic frameworks (Au NPs@NiPc-Cu MOFs) for the first time. The NiPc-Cu MOFs exhibit excellent conductivity, large specific surface area, and porous structure, which can accelerate the mass transfer process of target molecules. To further improve the sensitivity of the sensing platform, Au NPs with outstanding conductivity were introduced to the surface of NiPc-Cu MOFs to prepare Au NPs@NiPc-Cu MOFs. The synergistic effect of NiPc-Cu MOFs and Au NPs endows the sensor with excellent electrocatalytic performance and outstanding sensitivity. Under optimal conditions, the electrochemical sensor has a wide linear range (0.1–40 μM). Moreover, the prepared sensor possesses good stability and anti-interference ability. This method does not require complicated sample pretreatment, simple operation, and short detection time, which can provide a new method for the rapid detection of Lu.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jinxin Wang,Guicheng Jiang,Weicheng Huang,Danqing Liu,Bin Yang,Wenwu Cao
PbTiO 3 (PTO) and Cu-doped PbTiO 3 thin films were deposited on the fluorine doped tin oxide (FTO) by a sol-gel route. Detailed investigations were made on the effects of Cu doping on the crystal structure and ferroelectric properties of the thin films. With increasing Cu amount, the crystal structure of Cu-doped films gradually transits from tetragonal to pseudo-cubic phase. Worth mentioning, the Cu-doped can induce a superior giant remnant polarization of ∼55.7 μC/cm 2 and a relatively low coercive field of 304 kV/cm when the molar concentration of Cu in the sol is 0.02. The experimental results show that Cu-doped PbTiO 3 is very a promising candidate for ferroelectric random access memory (FERAMs) applications.
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高影响因子
ChemCatChem
·
2022
·Vol. 14
·期 13
·e202200311
·
IF 5.497
Yuyao Zeng,Bowei Wang,Fanyong Yan,Wensheng Xu,Guoyi Bai,Yang Li,Xilong Yan,Ligong Chen
Graphical Through a convenient impregnation method, highly-distributed and stable Cu nanoparticles were dispersed on the boron doped γ-Al 2 O 3 support, which catalyzed continuous reductive amination of levulinic acid to corresponding N-substituted pyrrolidinones. The reductive amination of biomass-derived levulinic acid (LA) to value-added N-substituted pyrrolidinones with amine and molecular hydrogen over heterogeneous catalyst represents an atom-economical and scalable route. In this paper, a series of boron doped Cu/Al 2 O 3 catalysts via kneading and impregnation method are developed for the continuous reductive amination of LA. Compared with Cu/Al 2 O 3 , Cu 10 /AlB 3 O catalyst exhibits greatly improved catalytic performance for this reaction at low operation temperature. Structure-property correlation investigations were performed with diverse characterization methods, and the results revealed that the excellent catalytic performance of boron doped Cu/Al 2 O 3 catalysts was mainly attributed to the synergistic effect of its well-dispersed Cu nanoparticles, appropriate surface Cu electronic state and surface acidic sites nearby. Besides, Cu 10 /AlB 3 O shows great stability during the reaction over 200 h. This work provides a low-cost, efficient and environmentally friendly heterogeneous catalytic system for the continuous production of N-substituted pyrrolidinones.
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LANGMUIR
·
2025
·
IF 3.9
Zheng Cheng,Jikang Cao,Haobo Lin,Yuchen Wang,Ran Qin,Yuhao Ruan,Xinyu Hu,Jingxuan Cang,Chang Sun,Dong Qiu,Yifeng Bian,Yifei Du,Yongchu Pan
Age-related decline in bone healing capacity poses significant challenges for tooth extraction recovery in the elderly. Elevated reactive oxygen–nitrogen species (RONS) and impaired mitophagy drive this pathology. We engineered bimetallic Cu–Fe3O4 nanoclusters with oxygen vacancies (OVs) via hydrothermal synthesis. The abundant oxygen vacancies and bimetallic synergy endow Cu–Fe3O4 with exceptional enzyme-mimicking activity, enabling efficient scavenging of excess RONS and activation of mitophagy in senescent cells in vitro, thereby reversing functional decline. Owing to its excellent biocompatibility and negligible in vivo toxicity, Cu–Fe3O4 accelerates tooth extraction wound healing in aged animal models.
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