JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Chengxi Zhu,Dong Liu,Zhi Chen,Libo Li,Tianyan You
Pt nanoparticle-loaded carbon nanohorns (Pt/CNHs) nanocomposites were synthesized by using formic acid as reducing agent at room temperature. Taking the advantage of the high surface area and excellent electronic conductivity, CNHs were used as support without any pretreatments for the enhancement of catalytic performance. By adjusting the feeding amount of H 2 PtCl 6 , the mass, size and distribution of Pt nanoparticles could be effectively controlled on CNHs. Compared with commercial Pt/C, the synthesized Pt/CNHs exhibit higher catalytic activity and improved long-term stability toward both methanol and formic acid oxidations. Among the Pt/CNHs, 13% wt. Pt/CNHs exhibit the best catalytic performances for the small size (2.4 nm) and uniform distribution of Pt NPs on CNHs. Our work reveals the superior catalytic performance of Pt/CNHs which may be a promising substitute for commercial Pt/C.
研究领域:
材料科学
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Crystals
·
2018
·Vol. 8
·期 11
·397
·
IF 2.144
Lingxiao Chen,Hang Liu,Linghao Liu,Yifan Zheng,Haodong Tang,Zongjian Liu
Ni nano-micro structures have been synthesized via a solution reduction route in the presence of ethylenediamine (EDA) under strong alkaline conditions. The phase composition, morphology, and microstructure of the resulting products are investigated by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The presence of EDA plays an important role in the formation of Ni nano-micro structures, and microflowers or microspheres assembled from nanosized horns can be produced by changing the amount of EDA. The size of Ni nano-micro structures is dependent on the NaOH concentration, and long chains assembled from Ni nano-micro structured microspheres can be obtained by reducing the amount of NaOH solution used. The role of both EDA and NaOH in the reduction of Ni (II) to Ni, as well as in the growth of Ni nano-micro structures, has been discussed, and a possible formation mechanism of these Ni nano-micro structures has been proposed based on the experimental results.Keywords:ethylenediamine;microspheres;nanohorns;nano-micro structures;nickel
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Foods
·
2024
·Vol. 13
·期 18
·2996
·
IF 4.7
Jing Wu,Huilin Li,Zhijuan Wang,Mingfei Pan,Shuo Wang
Tert-butylhydroquinone (TBHQ) is a phenolic substance that is commonly employed to prevent food oxidation. Excessive or improper utilization of this antioxidant can not only impact food quality but may also pose potential risks to human health. In this study, an ultrasensitive, stable, and easily operable ratiometric electrochemical sensor was successfully fabricated by combining the tubular (3,4-ethylenedioxythiophene) (T-PEDOT) with single-wall carbon nanohorns (SWCNHs) for the detection of TBHQ antioxidants in food. The SWCNHs/T-PEDOT nanocomposite fabricated through ultrasound-assisted and template approaches was employed as the modified substrate for the electrode interface. The synergistic effect of SWCNHs and T-PEDOT, which possess excellent electrical conductivity and catalytic properties, enabled the modified electrode to showcase remarkable electrocatalytic performance towards TBHQ, with the redox signal of methylene blue serving as an internal reference. Under optimized conditions, the SWCNHs/T-PEDOT-modified electrode demonstrated good linearity within the TBHQ concentration range of 0.01–200.0 μg mL−1, featuring a low limit of detection (LOD) of 0.005 μg mL−1. The proposed ratiometric electrochemical sensor displayed favorable reproducibility, stability, and anti-interference capacity, thereby offering a promising strategy for monitoring the levels of TBHQ in oil-rich food products.
研究领域:
食品科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jie Huang,Yuting Wang,Hangchun Deng,Jianfa Chen,Jianhua Ding,Chunyan Wang
Herein, homogeneously dispersed Pt and MnO 2 nanoparticles were anchored to single-walled carbon nanohorns (SWCNHs) to obtain an efficient electrode material for supercapacitors. XPS and TEM analysis of the Pt/MnO 2 @SWCNH surface morphology confirms that the SWCNHs exhibit a dahlialike cluster structure with Pt/MnO 2 nanoparticles embedded in the interstices of the SWCNH horn structure to form a three-dimensional conductive network. This structure not only improves the overall conductivity of the composite but also provides more electron transfer pathways for the MnO 2 nanoparticles. Accordingly, the as-prepared Pt/MnO 2 @SWCNH composite displays a high specific capacitance (314.5 F/g at 1 A/g), good cycling stability (86.89% capacitance retention after 1000 cycles at 1 A/g), and remarkable rate performance (254.8 F/g at 10 A/g). Among reported composites of metal oxides, precious metals, and carbon materials, the prepared Pt/MnO 2 @SWCNH composite has outstanding electrical properties and is a highly promising candidate as supercapacitor.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2016
·Vol. 4
·期 36
·6043-6051
·
IF 4.872
Junling Wang,Ran Wang,Fangrong Zhang,Yajun Yin,Leixia Mei,Fengjuan Song,Mingtao Tao,Wanqing Yue,Wenying Zhong
Multidrug resistance (MDR) is a major obstacle to cancer chemotherapy due to the overexpression of P-glycoprotein (P-gp). Herein, etoposide (ETO) was loaded onto oxidized carbon nanohorns (oxCNHs), which were modified by polyethylene glycol (PEG) and further functionalized with the targeting ligand P-gp monoclonal antibody (PA) in an attempt to overcome MDR. The obtained drug delivery system (ETO@oxCNHs/PEG-PA) showed high drug loading efficiency, enhanced drug release under laser irradiation, improved cellular uptake and increased therapeutic effect both in vitro and in vivo. In addition, NIR laser irradiation had a synergistic effect on overcoming MDR. The MDR-overcoming mechanism could be the efficient cellular uptake, enhanced drug release and reduced drug efflux by P-gp. These results demonstrated that ETO@oxCNHs/PEG-PA could be a promising drug delivery system for cancer MDR reversion.
研究领域:
肿瘤学
·
纳米医学
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2015
·Vol. 21
·期 10
·2911-2917
·
IF 1.754
Zhu Shuyun,Zhao Xian-en,Chen Guang,Wang Hua,Xu Guobao,You Jinmao
We report a simple method for the direct and quantitative determination of dihydronicotinamide adenine dinucleotide (NADH) using a single-walled carbon nanohorn (SWCNH) modified glassy carbon electrode (GCE). The electrochemically activated SWCNH modified GCE (SWCNH/GCE) substantially lowers the overpotential necessary for NADH oxidation compared to the inactivated SWCNH/GCE or bare GCE. We observe a 89-mV shift in the peak potential of NADH from GCE to SWCNH/GCE and another 101-mV shift from inactivated SWCNH/GCE to activated SWCNH/GCE in phosphate buffer (pH 7.0) at a scan rate of 50 mV/s. The activated SWCNH/GCE shows a linear response toward NADH between 1 and 100 μM with the detection limit of 0.2 μM. The activated SWCNH/GCE displays good reproducibility, high sensitivity, and excellent stability. Furthermore, the fabricated electrochemical sensors were used to detect NADH in serum by standard addition method and the recoveries are satisfactory.
研究领域:
分析化学
·
生物化学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Jie Xu,Manman Xue,Yanjie Niu,Yang Guo,Zhipeng Xie,Feng Liang,Yixin Zhang,Jianjun Wu
Considering the limitations of traditional halogen flame retardants to cotton fabrics, the modification of hedgehog-like structured carbon nanohorns was firstly proposed to improve flame retardant synergistic effect in assembled coatings for protective cotton fabrics. The assembled coatings containing 3-aminopropyl triethoxysilane (APTES), modified single-walled carbon nanohorns (SWCNHs-o) and ammonium polyphosphate (APP) endowed cotton fabrics with highly efficient flame retardancy at an ultralow spraying number of 4, which was much more favorable than other previously reported coatings. (APTES/SWCNHs-o/APP) 4 effortlessly passed the vertical burning test and was capable of self-extinguishing. Furthermore, the LOI test showed that its LOI value could reach 29.0 ± 0.1%, suggesting a low fire exposure risk. Additionally, the results of cone calorimeter test displayed that pHRR, THR, MARHE and Av-EHC values of (APTES/SWCNHs-o/APP) 4 significantly reduced by 93%, 57%, 89% and 98%, respectively. The morphology of its residual char remained complete, demonstrating that the P/N/Si heterocyclic char layer formed by SWCNHs-o and APTES in synergy with phosphorus provided a physical barrier to prevent the release of volatile combustibles and the transfer of oxygen and heat. This work provides an efficient and novel method for the design and fabrication of self-extinguishing intumescent coatings.
研究领域:
材料科学
·
纺织工程
·
火焰防护
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 22
·11740-11744
·
IF 7.443
K. P. Annamalai,Jianping Gao,Lile Liu,Jun Mei,Woonming Lau,Yousheng Tao
This is the first report on the synthesis of nanoporous graphene/single wall carbon nanohorns (G/SWCNHs), a novel multicomponent of nanocarbons, using a facile hydrothermal method. Heterostructures were formed with interconnected graphene to support single wall carbon nanohorns (SWCNHs); meanwhile, SWCNHs prevented graphene nanosheets from stacking face-to-face. The samples were thoroughly characterized to illustrate their nanostructures and electrochemical properties. G/SWCNHs showed xerogel-like structures having ultra-micropores of ca. 0.6 nm and mesopores of 2–12 nm with the total nanopore volume of 0.20 cm3 g−1. The heterostructures of G/SWCNHs had an enhanced capacitance of 244 F g−1 in 1 M KOH with ultra fast charge–discharge and excellent rate capability, superior to reduced graphene oxide, SWCNHs and SWCNH composites. The nanohybrid achieved a capacitance retention of 99% after 1000 cycles at a current density of 10 A g−1, promising for practical high power density applications. This study also provides an environmentally friendly process for the preparation of better nanostructured carbons for electrochemical energy storage devices of high-performance.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Run-Zi Liao,Shuai Wei,Wen-Jing Yi,Jing-Huo Chen,Xin-Zheng Yue
The present study addresses the critical challenges associated with hydrogen production from ammonia borane (AB) hydrolysis, focusing on the development of cost-effective, high efficient, and stable catalysts. A promising strategy to achieve superior catalytic performance in AB hydrolysis involves alloying noble and non-precious metals. Herein, RuNi bimetallic nanoparticles were successfully deposited onto carbon nanohorns (CNHs) through a facial hydrothermal-reduction processes. The optimized Ru 0.6 Ni 0.4 -CNHs catalyst demonstrates a remarkably high turnover frequency (TOF) of 144 m o l H 2 mol Ru −1 min −1 , approximately twice that of Ru-CNHs. The synergistic effect between CNHs and the RuNi alloy enhances the anchoring and dispersion of metal particles, leading to reduced particle size and a narrow distribution, along with exceptional stability. Experimental results reveal that the incorporation of the RuNi alloy enables precise regulation of the electron distribution in Ru. Furthermore, density functional theory (DFT) calculations demonstrate that the RuNi alloy significantly reduces the activation and dissociation energies of AB and H 2 O on the Ru site of Ru 0.6 Ni 0.4 compared to those on a monometallic Ru site. This work provides valuable insights for designing efficient and economical bimetallic nanocatalysts for AB hydrolysis.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Hong Dai,Lingshan Gong,Guifang Xu,Shupei Zhang,Shuanyan Lu,Yuwei Jiang,Yanyu Lin,Longhua Guo,Guonan Chen
A simple and sensitive electrochemical sensor which was constructed with alkoxy silane and carbon nanohorns was first utilized to detect some food borne contaminants, including malachite green, sudans, triclosan, bisphenol A. Due to the large surface area, good conductivity, admirable electrochemical activity of carbon nanohorns and excellent immobility of alkoxy silane, the synergistic effect root from the easily controlled composition of organic–inorganic hybrid film was achieved. The present work demonstrated this functional film brings advantageous features such as stable and strong adherence to electrode matrix and excellent electrochemical catalysis, to electrochemical sensor to achieve advanced application. By choosing triclosan and malachite green as object, their kinetic parameters on this modified electrode were calculated and the relative quantitive protocols were established. Compared with previous reports, the designed sensor presented lower detection limit, higher sensitivity and more broad linear range. This electrochemical platform offered a useful tool for the on-site determination of food born contamination.
研究领域:
分析化学
·
食品安全
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Na Li,Dezhen Xie,Huimin Zhao,Chunya Yu,Zehu Li,Fei Li,Qiue Cao
In order to achieve a simple and rapid analytical method for determination of erythromycin (Ery) residues in food, an erythromycin molecularly imprinted membrane modified electrode (Ery-MIM/pDA/CNHs/GCE) was developed by sequentially modifying glassy carbon electrode (GCE) with carbon nanohorns (CNHs), polydopamine (pDA) and erythromycin molecularly imprinted membrane (Ery-MIM) via dropcoating of CNHs, electropolymerization of dopamine, and electropolymerization of 2-aminopyridine in the presence of Ery , respectively. In this work, CNHs was used as electrical signal amplification element due to its large surface area and excellent conductivity, and pDA was used as adhesive because of its high adsorption capacities. As expected, the resulting Ery-MIM/pDA/CNHs/GCE exhibits high sensitivity, good selectivity, excellent repeatability and stability. A linear response for the determination of Ery by Ery-MIM/pDA/CNHs/GCE was obtained in the concentration range of 1.0 × 10 -5 ∼ 1.0 × 10 -8 mol L -1 ( r 2 = 0.9810) with the detection limit of 2.7 × 10 -9 mol L -1 (S/N = 3). The electrode was used to detect Ery in food samples with satisfied recoveries of 95.4%∼103.0% and RSD below 6.0%.
研究领域:
分析化学
·
食品安全
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Tianxiang Jin,Bin Huang,Jie Huang,Feiqiang He,Zhirong Liu,Yong Qian
Poly(amic-acid) modified single-walled carbon nanohorns (PAA/SWCNH-COOH) contained dual-functional groups (amide and carboxyl) were synthesized by in-situ polymerization and used for the elimination of uranium (VI). It was found that the adsorption capacity of SWCNH-COOH increased significantly after grafting PAA chains, and the theoretical monolayer adsorption capacity of PAA/SWCNH-COOH could reach 216.0 mg/g. The adsorption capacity of this material could remain up to 90% of the initial value after 5 times of reuse. Moreover, PAA/SWCNH-COOH has an excellent adsorption selectivity , which could be attributed to the synergistic adsorption effects between amide and carboxyl groups. To further study the interaction mechanism between uranium ions and the adsorbents, the quantum chemical calculations were performed using DFT method. The simulation results show that both amide and carboxyl groups have a strong interaction with uranium ions, which ensures the high adsorption capacity of this material. This research proved that the PAA/SWCNH-COOH is a promising adsorption material for removing uranium from wastewater and it also sheds a light on the interaction mechanism between bifunctional adsorbents and uranium ions.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）