CATALYSIS LETTERS
·
2021
·Vol. 152
·期 9
·2832-2839
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IF 3.186
Zhang Fengming,Li Ran,Zhang Jiapeng,Dong Hua
Dendritic fibrous KCC-1 supported CuCo bimetal catalysts (CuCo/KCC-1) are fabricated by coprecipitating Cu 2+ and Co 2+ on the surface of KCC-1 nanospheres. The microstructure and composition of the fabricated CuCo/KCC-1 bimetal catalysts are analyzed with ICP-OES, SEM, TEM, and XPS. The CuCo/KCC-1 catalysts demonstrate excellent performance in catalyzing ammonia borane hydrolysis to produce hydrogen in alkaline solutions. As an example, the hydrolysis of ammonia borane catalyzed by Cu 3 Co 1 /KCC-1 (with a Cu/Co molar ratio about 3:1) gives a hydrogen generation rate of 5.43 L/(min g metal ), and an activation energy of 23.96 kJ/mol. The synergic effect between Cu and Co in the CuCo/KCC-1 catalysts maintains the excellent catalytic activity while reducing the usage of Co, making it possible to decrease the cost of the catalyst. Graphical Abstract
研究领域:
催化化学
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材料科学
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DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 35
·5959-5970
·
IF 2.7
Zhang Jingru,Chu Hongtao,Chen Jiaqi,Wang Qian,Qin Shili,Gao Lidi,Ma Wenhui,Li Jun,Zhao Ming,Zhang Weibing
In this study, three different materials were prepared: dendritic fiber-type silica (KCC-1), zeolitic imidazolate framework-8 (ZIF-8), and a new composite material called KCC-1@ZIF-8. These materials were synthesized using microemulsion, stirring, and coating methods, respectively. The properties of the materials were characterized using various techniques such as transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), TGA and X-ray diffraction (XRD). The results showed that KCC-1@ZIF-8 exhibited a significant increase in the BET surface area and pore size compared to the individual components KCC-1 and ZIF-8. These improved properties of the composite material were beneficial for enhancing the adsorption capacity. The effects of initial concentrations, solution pH and reaction time on the adsorption capacity were investigated. The adsorption kinetics and isothermal data of ZIF-8 and KCC-1@ZIF-8 fitted well with pseudo-second-order and Langmuir isotherm models. The results of adsorption thermodynamics show that the adsorption process is spontaneous and endothermic. KCC-1@ZIF-8 exhibited a very high adsorption capacity (751.46 mg g−1) at an initial TC hydrochloride concentration of 80 mg L−1 in an aqueous solution at 301.15 K, and the value was higher than that of ZIF-8 (549.80 mg g−1) under the same conditions. KCC-1 exhibited a relatively lower capacity (37.860 mg g−1). Based on these findings, KCC-1@ZIF-8 was considered a promising adsorbent for the treatment of wastewater contaminated with TC hydrochloride. Additionally, the composite material, when combined with high-performance liquid chromatography (HPLC), could be used as a solid-phase extraction adsorbent for the adsorption of TC hydrochloride in animal foodstuff samples. The calibration curves showed a linear range of 20–500 μg L−1, and the recovery rate ranged from 85.216% to 90.717%. No one has made adsorbents with this new structure before, and KCC-1@ZIF-8 possessed excellent adsorption properties, which make it a potential candidate for environmental remediation and analytical applications involving TC hydrochloride.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Meiling Zhang,Mingwu Zhao,Rongrong Chen,Jingyuan Liu,Qi Liu,Jing Yu,Rumin Li,Peili Liu,Jun Wang
It has been broadly studied to ensure the protection of magnesium alloy by superhydrophobic surface. In this work, the layered TiO 2 was prepared in response to the AZ31 Mg alloy by hydrothermal method and loaded wrinkled silicon dioxide (KCC-1) on the layer by electrostatic self-assembly to build a pod-like structure. After modification by stearic acid, the surface shows superhydrophobicity. The morphology, structure and composition of the surface were characterized by scanning electron microscope (SEM), the X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR), respectively. The anticorrosive effect of the superhydrophobic surface was investigated by detecting the electrochemical impedance spectroscopy and polarization curves in 3.5 wt% NaCl solution for a week. Superhydrophobic surfaces also exhibited chemical stability, physical stability and ultraviolet light tolerance. In addition, the TiO 2 containing in the film had a certain photocatalytic performance on decomposition of organic contaminants. Combining the self-cleaning property, the surface showed excellent adaptability to the outdoor environment.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhixian Du,Yuan Gao,Zhuanzhuan Liang,Yanqing Yang,Weike Zhang
In this work, the Bi 2 WO 6 /KCC-1 photocatalytic composite was prepared by hydrothermal method using Bi 2 WO 6 as photocatalyst and KCC-1 as cocatalyst, for degradation of Rhodamine B (RhB). The result shows that when the mass percentage of KCC-1 in the composite is 7 % (BK-3), the photocatalytic degradation efficiency is the highest, reaching 90.63 %. Furthermore, the BK-3 composite shows a well degradation activity (83.90 %) even after four consecutive cycles of photocatalysis. Characterization of the photocatalyst by various testing techniques show that the BK-3 composite presents high visible light response, narrow energy band, and strong separation of photogenerated carriers. The results of free radical capture experiments indicate that the main active substance in the degradation of RhB under visible light is h + and ·O 2 − also plays a certain auxiliary role. This study offers promising prospects for the preparation of highly efficient photocatalysts through the modification of bismuth-based materials.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Songyuan Hao,Hong Yuan,Huiliang Zhou
Ni-Cu/Al-KCC-1 catalysts with different metal contents were prepared using fibrous nano-silica (Al-KCC-1) as a support. Field emission scanning electron microscopy observations showed that the spherical particle morphology and fibrous structure of the Al-KCC-1 were not changed after metal loading. Transmission electron microscopy images demonstrated that the introduction of copper improved the dispersion of the nickel, while X-ray diffraction and hydrogen temperature-programmed reduction confirmed the formation of a Ni-Cu alloy. The N2-Brunauer–Emmett–Teller specific surface areas of the catalysts were in the range of 269–378 m2/g and the average pore diameters were 7.988–12.078 nm. These Ni-Cu/Al-KCC-1 catalysts were used to promote the cracking of waste cooking oil model compound (WCOMC) to produce H2 and carbon nanotubes (CNTs), and the 10 wt% Ni-5 wt% Cu/Al-KCC-1 exhibited the highest catalytic activity. At a WCOMC flow rate of 0.04 mL/min and 750 °C, the instantaneous volume fraction of H2 reached 49.8 vol% and the content of H2 in the gaseous product was close to 71.4 vol%.
研究领域:
化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2020
·Vol. 33
·期 6
·749-756
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IF 1.067
Zhou Xue-zheng,Yan Xiang-yang,Zhu Ling,Ma Ming,Dai Ya,Wang Chang-guo,Zhu Li-jun,Yu Ke-jie,Liu Shao-min
A new kind of phenyl-functionalized magnetic fibrous mesoporous silica (Fe 3 O 4 @SiO 2 @KCC-1-phenyl) was prepared by copolymerization as an efficient adsorbent for the magnetic extraction of phthalate esters from environmental water samples. The obtained Fe 3 O 4 @SiO 2 @KCC-1-phenyl showed monodisperse fibrous spherical morphology, fairly strong magnetic response (29 emu/g), and an abundant π -electron system, which allowed rapid isolation of the Fe 3 O 4 @SiO 2 @KCC-1-phenyl from solutions upon applying an appropriate magnetic field. Several variables that affect the extraction efficiency of the analytes, including the type of the elution solvent, amount of adsorbent, extraction time and reusability, were investigated and optimized. Under optimum conditions, the Fe 3 O 4 @SiO 2 @KCC-1-phenyl was used for the extraction of four phthalate esters from environmental water samples followed by high-performance liquid chromatographic analysis. Validation experiments indicated that the developed method presented good linearity (0.1–20 ng/mL), low limit of detection (7.5–29 µg/L, S / N =3). The proposed method was applied to the determination of phthalate esters in different real water samples, with relative recoveries of 93%−103.4% and relative standard deviation of 0.8%–8.3%.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Ran Li,Hao Shi,Jinlin Song,Zihong Dong,Tao Wan,Hua Dong
The introduction of magnetism into a catalyst can greatly optimize its separation performance. In the present work, a kind of magnetically separable catalysts for promoting NaBH 4 hydrolysis have been fabricated by anchoring cobalt nanoparticles on magnetic dendritic KCC-1 nanospheres composed of magnetic Fe 3 O 4 core and fibrous shell. The fabricated catalysts were characterized with various characterization methods, including absorption spectroscopy (AAS), scanning electron microscopy (SEM), high-resolution transmission electronic microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometry (VSM), and Fourier transform infrared (FT-IR), etc. This kind of catalysts exhibit high catalytic activity for promoting the hydrolysis of NaBH 4 under alkaline conditions, giving a hydrogen generation rate and activation energy of 3.83 L min −1 g Co −1 (30 °C) and 53.63 kJ mol −1 , respectively. After used for 5 cycles, the catalyst showed 36.5% catalytic activity reserved. Most importantly, the magnetism of the catalyst made it easily separated and recycled from the solution after the reaction completed. The development of this kind of catalysts could provide a promising option for catalyzing NaBH 4 hydrolysis for portable hydrogen production from.
研究领域:
催化
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纳米技术
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氢能
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材料科学
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DOI
高影响因子
MATERIALS LETTERS
·
2013
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IF 2.224
Kejie Yu,Xuebin Zhang,Hongwu Tong,Xiangyan Yan,Shaomin Liu
Fibrous monodisperse core–shell structured Fe 3 O 4 /SiO 2 /KCC-1 nanoparticles were synthesised successfully through a surfactant-templated microemulsion formation process. The structure and morphology of the synthesised nanoparticles were investigated by scanning electron microscopy , transmission electron microscopy , superconducting quantum interference device susceptometer, X-ray diffraction, thermogravimetric analysis and N 2 adsorption/desorption. These nanoparticles showed monodisperse spherical morphology, high magnetism , good thermal stability , large surface area , direct channels, easily accessible large pores and narrow size distribution. A mechanism for the synthesis of these nanoparticles was proposed and explained. Adsorption experiments indicated that the as-prepared materials had good adsorption capacity for dye and could perform a fast transfer of molecules, indicating its promising application in purification of industrial wastewater, drug delivery and so on.
研究领域:
纳米医学
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材料科学
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环境工程
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生物材料
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药剂学
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胶体与界面化学
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DOI
高影响因子
Catalysts
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2023
·Vol. 13
·期 6
·969
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IF 3.9
Srinivasan Vinju Vasudevan,Jin Cai,Junming Xu,Hongjian Lin,Hongliang Wang,Quan Bu
In this work, the microwave-assisted reaction of 5-hydroxymethylfurfural (5-HMF) into valuable ether and acylated production formation was investigated with the help of molybdophosphoric acid encapsulated dendritic fibrous silica (KCC-1) as a catalyst. XRD, N2adsorption-desorption, SEM, FT-IR, NH3-TPD, and TEM were used to analyze the physicochemical and structural properties of the synthesized catalysts. The microwave etherification of 5-HMF with ethanol was tested using synthesized catalysts. The effects of the reaction temperature, reaction time, catalytic amount, and microwave power were investigated. The resulting MPA-KCC-1 and IMPA-KCC-1 catalysts demonstrated excellent activity for the etherification of 5-HMF with ethanol, producing 5-(hydroxymethyl) furfural diethyl acetal (HMFDEA) and 5-(ethoxymethyl)furfural diethyl acetal (EMFDEA) products selectively. The significant advantages of the work are the selective production of EMFDEA at 82%, the catalyst can be easily removed via filtration, and the catalyst activity remains nearly intact even after five reaction cycles.Keywords:biomass;acetylation;5-HMF;etherification;heteropolyacid;fibrous silica
研究领域:
化学工程
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催化材料
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DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Chufei Lv,Leilei Xu,Mindong Chen,Yan Cui,Xueying Wen,Cai-e Wu,Bo Yang,Fagen Wang,Zhichao Miao,Xun Hu,Qinghui Shou
In this work, we reported that the fibrous silica nanosphere, also called as KCC-1, was facilely synthesized by the improved microemulsion hydrothermal fabrication strategy. The obtained KCC-1 was investigated as the support of the Ni based catalysts toward CO 2 methanation. The obtained catalysts with unique dendrimeric mesopore structure and outstanding structural properties could provide easily accessible as well as highly dispersed Ni nanoparticles to the gaseous reactants. Besides, the Ni based catalysts with commercial SiO 2 and MCM-41 as supports were also prepared as the reference catalysts to demonstrate the advantages of the dendrimeric mesoporous channels. Various techniques, such as X-ray powder diffraction (XRD), N 2 physisorption, transmission electron microscopy (TEM), H 2 temperature programmed reduction (H 2 -TPR), CO 2 temperature programmed desorption (CO 2 -TPD), X-ray photoelectron spectroscopy (XPS), etc., were used to characterize the catalytic supports and corresponding catalysts. It was found that the metallic Ni nanoparticles could be highly dispersed over the catalysts supported on fibrous KCC-1 with dendrimeric mesoporous channels. Furthermore, the catalytic performances toward CO 2 methanation had been further evaluated over these catalysts at different temperatures. It was found that the KCC-1 supported catalyst performed much higher low-temperature catalytic activities than the reference catalysts supported on commercial SiO 2 and MCM-41, suggesting that the fibrous and dendrimeric mesoporous channels displayed distinctive advantages by accommodating enough metallic Ni active sites. The kinetic study also revealed that the topology of the mesoporous channel could obviously influence the apparent activation energy in the CO 2 methanation reaction. Besides, the temperature programmed surface reaction (TPSR) and in-situ Diffused Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) of the CO 2 methanation were also carried out to reveal the possible reaction pathway and mechanism. We also found that the fibrous silica nanosphere (KCC-1) supported catalyst demonstrated much better sintering-proof property of the metallic Ni nanoparticles than the reference catalysts during the 40 h stability tests at 400 °C. Therefore, the present fibrous silica nanosphere (KCC-1) could be considered as the promising support for Ni based catalysts toward CO 2 methanation.
研究领域:
材料科学
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催化化学
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 43
·24783-24790
·
IF 3.049
Yabin Wang,Keke Hu,Juan He,Yantu Zhang
Dendritic fibrous nano-silica (DFNS), also well-known as KCC-1, possesses three-dimensional center-radial nanochannels and hierarchical nanopores. Compared with conventional mesoporous materials like SBA-15, these special structural characteristics endow DFNS with more accessible internal space, higher specific surface area, larger pore volume, etc. Even though great progress has been achieved, the as-prepared KCC-1 nanospheres exhibit extremely non-uniform diameters and their sizes differ enormously in almost all available traditional synthesis approaches. Herein, a facile and low-cost one-pot rotating hydrothermal approach is adopted to improve the size uniformity of dendritic fibrous nano-silica. Stirring rates of 30, 60, 90, 120, and 150 (the maximum) revolutions per minute (rpm) can influence KCC-1 uniformity to certain extents. Among them, 60 rpm can be considered to be an ideal stirring rate for relatively uniform KCC-1 because of the best sufficient contact of reaction phases. A plausible synthesis mechanism can be explained in terms of continuously variable stress conditions of the reaction mother liquor (i.e., the bicontinuous microemulsion) during the fabrication process. To be specific, except for gravity (G), this technique brings about the centrifugal force (F) stemming from the stirring rate, and the buoyancy (f) originated from vigorous reversal of organic phase in the reaction solution. These forces synergistically mix organic phase and water phase, which generates new bicontinuous microemulsion droplets (BMDs) to supplement the consumed ones. All in all, this approach as well as the synthesis equipment is simple, inexpensive, and reproducible for large-scale KCC-1 preparation with improved size uniformity.
研究领域:
纳米材料学
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无机化学
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材料科学
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胶体与界面化学
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功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2022
·
IF 3.318
Qing Shen,Huijuan Yang,Yunyan Li,Shiyan Li,Kang Chen,Honghai Wang,Haixing Wang,Jianfeng Ma
Yellow catfish ( Pelteobagrus fulvidraco ) is commonly contaminated by protease inhibitors because of the illegal use of antiviral drugs in aquaculture, so the determination of antiviral drugs is essential in food safety supervision. In this study, a novel sorbent, graphene and silica nanospheres composite (G/KCC-1), was synthesized for pipette-tip-based solid-phase extraction (PT-SPE) and purification of ritonavir, saquinavir, and indinavir in yellow catfish, followed by ultra-performance liquid chromatography and tandem mass spectrometry (UPLC-MS/MS) analysis. The wrinkly structure of G/KCC-1 with center-radial nanowrinkles enlarged the surface area and increased the capacity of absorbing the target analyte. With the proposed G/KCC-1 based PT-SPE UPLC-MS/MS method, the pH of sample solution, aspirating/dispensing cycles for extraction and elution were optimized to be 4.0, 25, and 10 respectively, and the eluting solvent was methanol/ammonia (95:5, v/v) with 0.02 M sodium chloride. This new method was further validated to be linear (correlation coefficient R 2 , 0.9993–0.9996), sensitive (limit of detection, LOD ≤ 0.8 ng mL −1 ), accurate (89.3–114.2%), and precise (relative standard deviation, RSD ≤ 6.23%). These results indicated that the proposed method is qualified in bioanalytical method validation and meets the requirements for detecting illegally used antiviral drugs in yellow catfish. The demonstrated G/KCC-1 based PT-SPE UPLC-MS/MS method is a potential analytical method in food and drug administration.
研究领域:
食品安全
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分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）