NANO
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2017
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IF 1.025
Jingyuan Cao,Fei Wang,Shuai Liang,Xue Tong,Zhongnan Zhang,Jian Feng,Haifeng Wang,Xingmao Jiang
Nickel nanoparticles embedded in mesoporous silica (Ni/SiO 2 ) were successfully synthesized by microwave-assisted in situ self-assembly method using colloidal silica, urea and nickel nitrate as precursors and glucose as carbon template, which resulted in mesoporous structure of silica through removal of template. Ni nanoparticles were uniformly well-dispersed within mesoporous silica, which were 3.5–4.0 nm in diameter and had a very narrow particle size distribution. In addition, particle size of Ni nanoparticles can be controllably adjusted by microwave power. As-prepared Ni/SiO 2 catalyst exhibited better catalytic activity for reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) than Ni/SiO 2 -IM catalyst, which was mainly attributed to confinement effect of mesoporous silica support. This simple and versatile method can also be extended to cover many kinds of other supported catalysts for broad applications in many other catalytic reactions in the future.
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Tian Tian,Xiaoling Hu,Ping Guan,Shuangjie Wang,Xiaoqi Ding
Energetic ionic liquids (EILs) based upon nitrate, perchlorate and dicyandiamide salts of 1-alky/esteryl-4-amino-1,2,4-triazolium are synthesized. The structures are characterized by 1 H NMR, FT-IR and element analysis. The density, constant volume combustion heat and specific heat capacity of these EILs are determined through experiment. Their interaction energies of ion pairs , standard molar volume , standard molar heat capacity and standard molar enthalpy of formation are calculated by DFT/B3LYP/6-311 + G(d,p) and further researched. The thermodynamics function data relative to the reference temperature (298 K) are obtained based on the C p from 303 to 353 K. The influences of temperature, molecular structure and interaction energy of ion pairs on ρ and C p are also discussed systematically. In addition, the density and thermodynamic properties of EILs are deduced from theoretical calculation and experimental evidences. As a result, the physicochemical properties estimation of EILs using theoretical calculation method can be applied in the field of modern military, science, etc.
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Progress in Natural Science-Materials International
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2016
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IF 1.753
Jie Li,Bo Xu,Guangning Liu,Guozhu Chen,Tao Zhang,Fengshou Zhang,Cuncheng Li
In this study, an effective wet-chemical route was developed in an aqueous solution for the synthesis of spindle-like palladium nanoparticles (Pd NPs). Spindle-like Pd NPs in high-yield were successfully synthesized by using cetyltrimethylammonium chloride (CTAC) as surfactant and ascorbic acid (AA) as reduction reagent. The influence factors including the concentration of CTAC, AA, and NaI, as well as the reaction temperature for synthesis of spindle-like Pd NPs were systematically investigated. The formation mechanism of spindle-like Pd NPs was proposed on the basis of these experimental results. Spindle-like Pd NPs with high density of twins and sharp edges exhibit enhanced catalytic activities for the reduction of 4-nitrophenol.
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SYNTHETIC METALS
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2017
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IF 2.435
Peng Kong,Rui Wang,Chen Zhang,Zhongjie Du,Hangquan Li,Wei Zou
A novel strategy for synthesizing a quantum dot (QD)-sensitized silver nanowire (AgNW) nanocomposite has been reported. 4-aminothiophenol (PATP) functionalized quantum dots (QDs-PATP) were prepared using the thiol ( SH) end of PATP molecules strongly bound to the surface of QDs via a ligand exchange technique. AgNWs could bind to the remaining amino group ( NH 2 ) of PATP via self-assembly techniques, and quantum dot-sensitized silver nanowires were then formed. The nanocomposite is denoted as QDs-PATP@AgNWs. The photovoltaic properties of a quantum dot-sensitized solar cell (QDSSC) based on QDs-PATP@AgNWs were investigated. Under AM 1.5 illumination, the QDSSC reached a peak conversion efficiency of 3.34%. This finding suggests that QDs-PATP@AgNWs had potential applications as a photoanode for QDSSC.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 3.7
Yue Zhou,Wenjun Li,Hongjun Hu,Zhaohui Wang,Zhaoliang Cui
The membrane aeration biofilm reactor (MABR) represents an innovative approach to wastewater treatment, integrating gas separation membranes with biofilm process and demonstrating effectiveness in treating wastewater rich in ammonia nitrogen. In this system, hollow fiber membranes are essential, serving as a substrate for biofilm attachment while facilitating oxygen transfer to microorganisms through aeration, hydrophobic microporous membranes are utilized in MABR applications. This study focuses on the use of poly-4-methyl-1-pentene (PMP) hollow fiber membranes, which exhibit superior oxygen permeation capabilities compared to traditional hydrophobic microporous membranes. To overcome the challenges posed by the hydrophobic nature and low bubble point of PMP microporous membranes, a hydrophilic modification was conducted using dopamine/poly(ethyleneimine) (DOPA/PEI) co-deposition to enhance microbial adhesion on the membrane surface. The composite membrane modified with DOPA/PEI exhibited an approximately 20% higher NH 4 + -N removal efficiency than the unmodified membrane. These findings suggest that the incorporation of DOPA/PEI significantly improves MABR performance, underscoring its potential for further research and development in membrane technology for MABR.
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AICHE JOURNAL
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2024
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IF 3.5
Xin Zhao,Ruiqi Fang,Fengliang Wang,Yingwei Li
Here, we report the fabrication of atomic-metal catalysts for the facile cascaded transformation of lignin β-O-4 dimeric model compound into quinoline. A series of dual-metal single-atom (SA) moieties (MaC 4 and Mb 2 N 6 , where Ma and Mb represent two different metal SAs, C and N represent carbon and nitrogen atoms, respectively) are integrated on N-doped carbons with designed compositions and coordination configurations. Characterizations indicate the homogeneous distribution of uniform and modifiable SA sites, over which the electron distribution is significantly polarized due to synergistic interactions. The distinctive physicochemical properties of catalysts afford attractive performances in the cascaded synthesis of quinoline from lignin β-O-4 dimeric model compound through cascaded transformation. In a continuous flow instrument, CuC 4 /Co 2 N 6 @NC furnishes 93.7% yield of 2-phenylquinoline with a space-time yield of 75.7 g g cat h −1 . Control experiments and density functional theory calculations reveal the synergistic interactions between CuC 4 and Co 2 N 6 endow the catalyst with high efficiency in cascaded transformation.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
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IF 6.3
Xiangyang Zhao,Lingling Wang,Yawei Wang,Xingyu Zhang,Rong Fang,Yue Zhou,Rui Guo,Xintong Zhang,Yichun Liu
Kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cells are considered a promising new type of film cell, due to their rich elemental reservation and excellent photovoltaic performance. However, the deleterious defects at the heterojunction interface severely hinder charge transport, separation, and extraction, significantly limiting the photovoltaic performance of CZTSSe solar cells. In this study, a simple method involving the incorporation of Cd 2+ and Ag + dual-ion at the heterojunction interface was proposed to reduce interfacial defects. The results showed that Cd 2+ and Ag + dual-ion interface deposition effectively reduced the [2Cu zn + Sn zn ] harmful defects near the heterojunction interface and subsequently reduced the number of recombination centers in the interface. This led to improved carrier recombination at the interface. Meanwhile, the devices achieved a wider depletion width, which was more favorable for carrier collection. Ultimately, the conversion efficiency increased by 32.81 %. This simple interface dual-ion deposition strategy offers a promising strategy for further enhancing the efficiency of CZTSSe cells.
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ENERGY & FUELS
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2024
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IF 5.2
Haixuan Gao,Chuanhe Ma,Jinhui Zhang,Jinchun Jiang,Ye Chen,Lin Sun,Hailong Wang
In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm–1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20–35% higher than the other three Cd-salts in the light range of 350–1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).
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高影响因子
Progress in Natural Science-Materials International
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2025
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IF 7.1
Jie Li,Zhangyue Zheng,Yuehong Huang,Liu He,Hongying Guo,Chunzheng Wu,Wei Liu,Weiwei Huan
The serious problems caused by water contamination call for efficient treatment. The catalytic reduction of 4-nitrophenol (4-NP) by NaBH 4 in solution is a convenient way to convert 4-NP to 4-aminophenol (4-AP), which is a precious intermediate for manufacturing of important materials such as pharmaceuticals. In the present study, the Co modified MoS 2 supported Au nanoparticles (Au/Co-MoS 2 ) is proved to be an efficient catalyst for the reduction of 4-NP. With the introduction of cobalt, the catalytic activity is improved obviously compared to Au/MoS 2 . When Co:Mo is 2:8 (mol), the Au/CoMoS 2 (2/8) catalyst exhibits the highest activity. The kinetics of the catalytic reactions were studied by the plot of ln(C t /C 0 ) against reaction time and the k app for Au/CoMoS 2 (2/8) is 1.063 min −1 . The characterization of the catalysts shows that the addition of cobalt can create more crystal defects, promote the exposure of active edge sites, facilitate the surface of catalysts to be more reactive.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuan Zhang,Kangping Cui,Xueyan Liu,Minshu Cui,Xing Chen,Yuchao Tang,Haiyang Li,Kun Wang
In order to improve the photocatalytic activity of pristine carbon nitride while maintaining its metal-free property to achieve the activation of peroxymonosulfate (PMS), a series of carbon-doped g-C 3 N 4 (BCN) with different carbon contents were synthesized in this paper by adding benzotriazole to urea. The catalyst obtained by this approach significantly promoted PMS activation and enhanced the degradation efficiency of 4-chlorophenol (4-CP). Experiments and theoretical calculations showed that the introduction of carbon not only narrowed the band gap, but also accelerated the separation of photoinduced electron-hole pairs, which greatly improved the photocatalytic activity of g-C 3 N 4 . In the degradation of pollutants, free radicals and non-free radicals acted simultaneously, with non-free radicals playing a dominant role. This study explained the origin of 1 O 2 by Density functional theory (DFT) calculations, visible light excited photocatalysts to form holes, while carbon introduction decreased the valence-electron density around the area, inducing electron transfer from PMS toward g-C 3 N 4 directed to generate 1 O 2 . The 1 O 2 -dominated degradation process improved the application of the catalysts in complex aqueous matrices. In addition, we proposed 4-CP degradation pathways, and the toxicity of intermediates derived from 4-CP degradation process reduced.
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AICHE JOURNAL
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2024
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IF 3.5
Guimei Zhou,Wenjun Yan,Shufan Yan,Dandan Gao,Debin Zeng,Dongdong Li,Dewen Zeng
Solvent extraction of lithium by β-diketones from alkaline brine has been known to be an efficient process. However, its relatively high working pH, consequently the high alkaline consumption and substantial dissolution loss in raffinate, limit its industrial application. Herein, a novel lithium extractant, i.e., 2-hydroxy-5-nitro-4- n -octoxy-benzophenone (referred to as N531), was proposed, which can extract lithium at relatively lower pH with remarkable low alkaline consumption and dissolution loss. Exactly, the pH corresponding to half lithium extraction is 8.5, and the Li/Na separation factor is ~500. The extractant concentration in the raffinate varied from 0.8 to 9.3 mg L −1 , depending on the pH and salinity. An application case was given to extract lithium from the raw brine of Zabuye salt lake, indicating that N531 is a commercially prospective extractant to extract lithium from alkaline brine.
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Advanced Science
·
2024
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IF 14.3
Kang Chen,Keyuan Pan,Shang He,Rui Liu,Zhe Zhou,Duoyi Zhu,Zhengdong Liu,Zixi He,Hongchao Sun,Min Wang,Kaili Wang,Minghua Tang,Juqing Liu
Ionic memristors can emulate brain-like functions of biological synapses for neuromorphic technologies. Apart from the widely studied excitatory-excitatory and excitatory-inhibitory synapses, reports on memristors with the inhibitory-inhibitory synaptic behaviors remain a challenge. Here, the first biaxially inhibited artificial synapse is demonstrated, consisting of a solid electrolyte and conjugated microporous polymers bilayer as neurotransmitter, with the former serving as an ion reservoir and the latter acting as a confined transport. Due to the migration, trapping, and de-trapping of ions within the nanoslits, the device poses inhibitory synaptic plasticity under both positive and negative stimuli. Remarkably, the artificial synapse is able to maintain a low level of stable nonvolatile memory over a long period of time (≈60 min) after multiple stimuli, with feature-inferencing/-training capabilities of neural node in neuromorphic computing. This work paves a reliable strategy for constructing nanochannel ionic memristive materials toward fully inhibitory synaptic devices.
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PubMed
高影响因子
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