SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Kaixiang Ji,Fangshuo Liu,Tesfaye Hailemariam Barkae,Shuai Quan,Abdallah M. Zeid,Wei Zhang,Jianping Li,Guobao Xu
N -hydroxyphthalimide (NHPI) is an efficient organic catalyst and an important chemical raw material which can be used as an intermediate in organic synthesis of drugs and pesticides. In this study, NHPI has been used as a coreactant of lucigenin chemiluminescence (CL) for the first time. The CL of the developed system is significantly enhanced in the presence of Co 2+ . Therefore, we developed a novel lucigenin-NHPI CL method coupled with flow injection analysis for the sensitive, precise, and selective determination of Co 2+ . The linear range of this method is 1–1000 nM, and the detection limit is 67 pM (S/N = 3). In addition, this method has a good selectivity for Co 2+ . It has been applied to the detection of Co 2+ in lake water, and the standard recovery rate is 95.9–103.2%, indicating that the method is feasible.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Chong Wang,Gaoyu Chen,Juanrong Kou,Xianju Zhang,Xiangxing Xu,Jianchun Bao,Zihan Shen,Xin Jin,Huigang Zhang,Li Liu,Kehan Yu
Antimony (Sb) is a competitive candidate for lithium ion batteries (LIBs) as anode material because of its high theoretical discharge capacity (660 mAh/g). However, it remains a challenge caused by the volume change in the process of charge and discharge, which would damage the Sb anode that lead to poor rate performance and low cycle stability. Herein, we report the synthesis of Sb@S–N–C nanocomposite as the anode material to solve the problem. First, SbSI nanowires with diameter of ∼10 nm were synthesized. Then the SbSI nanowires were coated with polypyrrole (PPy) to form SbSI@PPy core-shell nanowires. By thermal reduction of SbSI@PPy, Sb@S–N–C nanocomposite was formed. Using the Sb@S–N–C nanocomposite as the anode material, a capacity of 536 mAh/g was obtained in 100 cycles at 0.5 A/g. Excitingly, it also exhibited superior reversible and long-cycle non-decay stability with the capacity of 342 mAh/g in 2000 cycles at a high current density of 1A/g.
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高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2016
·Vol. 48
·期 2
·243-250
·
IF 2.395
Lin Wang,Yan Zhang,Wenqi Zhang,Tianrui Ren,Feng Wang,Haifeng Yang
Silver nanoparticle (AgNP)/poly( N -isopropylacrylamide) (PNIPAAm) composite solution was electrospun followed by crosslinking to fabricate AgNP/PNIPAAm composite nanofiber mats. Embedded AgNPs were found to align along the PNIPAAm nanofibers, which generate more hotspots upon laser-induced plasmonic heating. This kind of AgNP/PNIPAAm mats show enhanced surface-enhanced Raman scattering (SERS) effect upon continuous pulsed laser irradiation, showing a ‘laser heating sensitive’ SERS effect. Laser-induced plasmonic heating can also tune the temperature-responsive interaction between PNIPAAm and analytes and has been applied in the on-site ‘laser heating sensitive’ separation and SERS detection of analytes. The composite nanofiber mats also showed good reproducibility and stability. What is more, this ‘laser heating sensitivity’ has also been applied in the direct SERS detection of adenosine in urea solution without urea interference. Together with the advantages of ease of large-scale fabrication, stable and ‘laser heating sensitivity’, AgNP/PNIPAAm mats might find application in sensitive multicomponent biosensing. Copyright © 2016 John Wiley & Sons, Ltd.
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 9
·2102193
·
IF 6.389
Pengcheng Wang,Changlai Wang,Yang Yang,Shi Chen,Zhiyu Cheng,Minxue Huang,Huigang Tong,Qianwang Chen
Highly active and low-cost anodic hydrogen oxidation reaction (HOR) catalysts play a significant role in the large-scale application of anion exchange membrane fuel cells (AEMFCs). Herein, a novel anodic HOR electrocatalyst with RuP nanoparticles loaded on N, O codoped porous hollow carbon (RuP/NOC) is prepared. The catalyst exhibits high catalytic activity toward HOR, achieving a kinetic mass activity of 3.25 mA µg –1 PGM at 50 mV, 13 times higher than that of Ru/NOC and even superior to that of Pt/C. Density functional theory (DFT) calculations demonstrate that the transfer of electrons from ruthenium to phosphorus shifts down the d-band center of Ru, weakening the hydroxyl binding energy and decreasing the reaction energy barrier for HOR, thus enhancing the catalytic activity of Ru.
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高影响因子
ACS Applied Energy Materials
·
2018
·
IF 0
Guanghe Dong,Huanlei Wang,Wei Liu,Jing Shi,Shijiao Sun,Dong Li,Hao Zhang,Yunpeng Yang,Yongpeng Cui
Hybrid sodium ion capacitors have been considered promising energy storage devices with superior energy and power performances by combining the advantages of batteries and supercapacitors. However, it is desirable to design anode materials with large specific capacity and excellent rate performance. Herein, we provide a large-scalable process to create the highly N-doped carbons by employing k-carrageenan as precursor and alkali metal nitrate as activating agent and dopant. Remarkably, the nitrate salt assisted synthesis process leads to a high nitrogen content of 8.6–12.6 at. % in the carbon framework. When applied as an anode for a sodium ion battery, the carbon delivers a high reversible capacity of 419 mA h g–1 at 50 mA g–1. The kinetics analysis manifests that the capacity contribution is mainly from capacitive storage, resulting in an excellent rate performance, e.g., 131 mA h g–1 at 10 A g–1. Benefiting from the rational design of the carbon anode, the optimized sodium ion capacitor exhibits a large energy density of 110.8 W h kg–1 and retains 85% of its initial capacity after 10 000 cycles. This work provides an effective way to fabricate highly N-doped carbons for advanced energy storage devices.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Zewei Jia,Shangbo Ning,Yuxin Tong,Xin Chen,Huilin Hu,Lequan Liu,Jinhua Ye,Defa Wang
Photothermal reverse water gas shift reaction is one of the promising methods to palliate global energy and environmental issues. Searching for catalysts with high activity and CO selectivity for CO2 conversion has been attracting extensive attention. In this work, Ni nanoparticle-loaded N-doped CeO2 (Ni/N-CeO2) composite catalysts were synthesized using a three-step method. Under light irradiation, the optimal Ni/N5.0-CeO2 exhibited a CO yield rate of 20.9 mmol·gcat–1·h–1 with almost 100% of CO selectivity via photothermal CO2 reduction. As a comparison, Ni/CeO2, without nitrogen doping, showed a high CH4 selectivity. The strong light absorption of Ni/N5.0-CeO2 mainly by loading of Ni nanoparticles and the enhanced adsorption/activation of CO2 molecules due to increased oxygen vacancies in N5.0-CeO2 by N-doping were supposed to account for the excellent catalytic performances. The doping of nitrogen was of particular importance for the formation of N–H bonds, which could modulate the reaction pathway for promoting the reduction of CO2 toward CO while suppressing the undesirable CO2 methanation process.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 44
·e53070
·
IF 3.057
Yuanyu Ge,Zhenming Qi,Desheng Sha,Xiaosai Hu,Shiwen Liu
Intumescent flame retardant (IFR) is the new generation of environmentally friendly flame retardant. The improved water solubility of IFR enhances its application in cellulose-based textiles. A water-soluble carbon–nitrogen–phosphorus (C–N–P) ternary IFR (PTETP) was synthesized using cyanuric chloride (TCT), ethylene glycol (EG), and O-phosphoethanolamine (O-PEA) as starting materials. The burning performance of untreated and PTETP treated cotton fabrics was evaluated using vertical flammability test (VFT), limiting oxygen index (LOI), and cone calorimetry. The results indicate that with the increase of PTETP content, the flame retardant performance of cotton fabrics is gradually enhanced. The cotton fabric treated with 10 wt% PTETP shows no afterflame combustion, has a char length of 98 mm, and a LOI of 30.8%. Compared with pristine cotton fabric, the peak heat release rate (PHRR) and total heat release (THR) of the treated cotton fabric were reduced by 52.6% and 28.2%, respectively. Thermogravimetric (TG) shows that PTETP effectively improves the thermal stability and reduces the thermal decomposition temperature of cotton fabric, and even can increases the residual carbon rate by 20%. In addition, the employment of PTETP shows no harm on the tensile strength of cotton fabrics. After washing 20 times, LOI of flame-retardant cotton fabric still remained almost 26%.
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高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Zibao Qian,Xuejie Wang,Tao Liu,Liuyang Zhang,Jiaguo Yu
Sodium-ion battery is an intriguing candidate in the post‑lithium era due to the earth-abundance of sodium. Transition metal selenides, with high conductivity and theoretical capacity, have been widely used in sodium-ion batteries. However, their structures are easily crushed when assembled as the anode, resulting in rapid capacity decay and poor rate performance, limiting its commercialization. In the present work, nickel‑cobalt selenide coated by nitrogen-doped carbon is prepared to activate multi-electron redox reactions. The composite exhibits excellent rate capacity (457 mAh g −1 at 0.1 A g −1 and 296 mAh g −1 when the current density is increased to 5 A g −1 ) and cycling stability (300 mAh g −1 after 1800 cycles at 2 A g −1 ). When assembled into a sodium ion battery, a high and stable specific capacity is also realized. This work illustrates the effectiveness of in-situ carbon coating as well as the potential advantages of selenide‑carbon composite as an anode material for sodium-ion batteries.
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高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 7
·1950-1960
·
IF 3.186
Wang Qing,Shi Shaojie,Wu Fan,Zhang Zhiguo,Li Guoneng,Zheng Youqu,Suo Yange
Abstract In this work, highly active CoZn nanocrystals embedded in N-doped graphene layers (CoZn@NG-nPVP) towards oxygen reduction reaction (ORR) were synthesized through pyrolysis of bimetallic zinc cobalt Prussian blue analogues (i.e., Zn 3 [Co(CN) 6 ] 2 -nPVP), which consists of coordination band between zinc and [Co(CN) 6 ] 3− , with PVP as a structure regulator. The obtained CoZn@NG-nPVP samples display three-dimensional porous microsphere structures. Compared with CoZn@NG samples derived from Zn 3 [Co(CN) 6 ] 2 without PVP, the CoZn@NG-nPVP samples derived from Zn 3 [Co(CN) 6 ] 2 -nPVP with PVP exhibit more carbon defects, larger BET specific surface area, and higher contents of pyridinic-N and graphitic-N, leading to the high activity of the catalyst. The onset potential of CoZn@NG-4PVP-900 catalyst towards ORR is 0.98 V (vs. RHE) and the half-wave potential is 0.87 V (vs. RHE), which are comparable with that of commercial Pt/C. In addition, the electrochemical stability of CoZn@NG-4PVP-900 is much higher than that of commercial Pt/C. Graphic Abstract
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高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 30
·305402
·
IF 3.399
Tong Wu,Yaying Li,Yuntong Li,Jing Hong,Haiyang Wu,Jie Mao,Yuzhe Wu,Qipeng Cai,Conghui Yuan,Lizong Dai
Simultaneous introduction of both transition metal and other inorganic elements into the carbon matrix has attracted great attention in the fabrication of carbon materials with high electrochemical properties. Herein, rational design of ligand-iron coordinative supramolecular precursors is achieved for the fabrication of Fe-N/C catalysts, which possess high oxygen reduction reaction (ORR) performance. A series of precursors are prepared by a simple coordination reaction between a three armed catechol monomer and iron ions. Particular interest is focused on tuning the doping species, surface area and morphology of the Fe-N/C catalysts through a simple selection of iron resources. We show that an Fe-N/C catalyst derived from Fe2(SO4)3 at a carbonization temperature of 800 °C, has the optimized ORR performance with an onset potential of 0.930 V and half-wave potential of 0.801 V. Detailed investigation indicates that the synergistic effect among doping elements of nitrogen and sulfur and the unique carbon structure determines the performance of the Fe-N/C catalysts. Our findings may be of significance for the fabrication of doped carbon materials using coordinative supramolecular polymers as precursors.
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高影响因子
CHEMICAL PHYSICS
·
2020
·
IF 1.771
Shenghai Zhou,Hongbo Xu,Jinyu Liu,Yajun Wei,Xinhuan Ma,Zhimin Han,Hongli Chen
N-doped carbon nanopipe-arrayed mesoporous carbon (N-CMK-5) with double-pore system, large surface area (992 m 2 /g), and high nitrogen amount (5.2 at.%) was synthesized by a simplified template route. In this route, mesoporous silica was directly used instead of using time-consuming aluminosilicate as a template and the carbonization process occurred in a nitrogen atmosphere instead of a vacuum. Furthermore, CMK-3, N-doped CMK-3, and CMK-5 ordered mesoporous carbons (OMCs) were compared with the as-prepared N-doped CMK-5 (N-CMK-5) to investigate the effect of microstructure on the electrochemical activity of OMCs. N-CMK-5 exhibited higher electrochemical activity than the other OMCs because it has more exposed defective sites and nitrogen active species. The developed N-CMK-5-based electrochemical sensor showed good practical application for the electrochemical detection of pesticide amitrole in real water sample. This work contributes a simplified route to synthesize tubular N-CMK-5 carbon and provides valuable information on the design of high-performance carbon electrode materials.
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高影响因子
SOLAR ENERGY
·
2018
·
IF 4.374
Lianjing Zhao,Leilei Zhao,Weinan Xue,Wenjuan Fang,Yuan Wang,Yan Li
To improve the catalytic activity of carbons in counter electrodes (CEs), Cu nanoparticles (NPs) were introduced into mesoporous N-doped carbons (N-C) derived from metal-organic frameworks (MOFs) to prepare the composites of N-C and Cu NPs (N-C@Cu) via impregnation and subsequent reduction method in this work. The obtained N-C@Cu composites with 2–4 nm Cu NPs uniformly distributing in N-C were deposited onto fluorine doped tin oxide (FTO) substrates by screen-printing to fabricate CEs in quantum dot solar cells (QDSCs). The N-C@Cu CEs exhibit higher electrocatalytic activity than both pristine N-C/FTO and commonly used Cu 2 S/FTO CEs, which could be ascribed to the synergistic effect between Cu x S NPs with the excellent electrocatalytic ability and MOF derived N-C with high graphitization, large hydrophilic surface as well as the abundant dopant active sites on the reduction of polysulfide. The superior performance of N-C@Cu composites results in an improved fill factor and a high short circuit current density. Based on optimized N-C@Cu CEs and Zn-Cu-In-Se quantum dot sensitizers, the QDSCs obtained present a promising power conversion efficiency of 9.23%, significantly superior to those of pristine N-C/FTO (7.20%) and Cu 2 S/FTO (8.89%) CEs based QDSCs.
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高影响因子
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