JOURNAL OF NANOPARTICLE RESEARCH
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2017
·Vol. 19
·期 12
·1-11
·
IF 2.02
Liao Kexuan,Gao Jialu,Fan Jinchen,Mo Yao,Xu Qunjie,Min Yulin
In this work, novel three-dimensional (3D) boron and nitrogen-co-doped three-dimensional (3D) graphene frameworks (BN-GFs) supporting rod-like polyaniline (PANI) are facilely prepared and used as electrodes for high-performance supercapacitors. The results demonstrated that BN-GFs with tuned electronic structure can not only provide a large surface area for rod-like PANI to anchor but also effectively facilitate the ion transfer and charge storage in the electrode. The PANI/BN-GF composite with wrinkled boron and nitrogen-co-doped graphene sheets interconnected by rod-like PANI exhibits excellent capacitive properties with a maximum specific capacitance of 596 F/g at a current density of 0.5 A/g. Notably, they also show excellent cycling stability with more than 81% capacitance retention after 5000 charge-discharge cycles.
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MICROCHIMICA ACTA
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2017
·Vol. 185
·期 1
·1-7
·
IF 4.58
Huang Wei,Zhang Ting,Hu Xiaoya,Wang Yang,Wang Jianmin
A porous carbon material doped with an iron species (Fe/PC) was prepared by carbonizing a mixture of zeolitic imidazolate framework-8 in the presence of iron(II) ions. The resulting material was characterized by X-ray diffraction, nitrogen adsorption isotherms, transmission electron microscopy, and by Raman and X-ray photoelectron spectroscopy. Fe/PC was the deposited on the surface of glassy carbon electrode (GCE) to obtain a sensor for amperometric determination of phenolic compounds. The unique catalytic activity, good electrical conductivity and hierarchical structure of the Fe/PC composite results in good electrooxidative activity towards hydroquinone (HQ; typically at 44 mV) and catechol (CC; typically at 160 mV). Under optimal conditions, the amperometric responses are linear in the range from 0.1 to 120 μmol · L −1 for HQ, and from 1.0 to 120 μmol · L −1 for CC. The respective detection limits are 14 and 33 nmol · L −1 . The sensor is highly selective against potential interferents and was successfully applied to the determination of HQ and CC contents in (spiked) water samples.
An amperometric sensor for phenolic compounds was constructed by using a metal-organic framework derived iron doped porous carbon material.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2017
·Vol. 35
·期 2
·557-566
·
IF 2.007
Sun Zhonghai,Wu Zhansheng,Liu Dandan,He Xiufang
Polycyclic aromatic hydrocarbons (PAHs) are toxic pollutants harmful to humans. To improve the adsorption capacity of PAHs on activated carbon (AC) from the aqueous system, AC was modified with cationic surfactants through microwave heating. Naphthalene is a typical PAH used as a model pollutant to test the adsorption properties of sample; the sample with the best adsorption performance was named SAC. The SAC was characterized by SEM, FTIR and BET in detail compared with AC. The specific surface area and the average pore size of SAC increased by nearly 100 m 2 g −1 and 0.14 nm more than the original AC, respectively. The adsorption experiment was carried out by batch technique with variables such as contact time, adsorbent amount, pH and temperature. Results showed that naphthalene was adsorbed rapidly during the first 20 min, and thereafter reached adsorption equilibrium in 40 min. The adsorption kinetics of naphthalene on SAC can be well described by the pseudo-second-order model and the Freundlich isotherm model better fitted the adsorption isotherms of naphthalene on SAC. Naphthalene adsorption process on SAC was spontaneous and temperature was found to negatively affect the adsorption capacity. Furthermore, film diffusion was confirmed the rate limiting step. The π - π stacking electron donor acceptor interaction, hydrophobic interaction and hydrogen bonding may play more key roles in naphthalene adsorption on SAC than AC. Thus, microwave-assisted surfactants modification was proven to be an effective method to enhance the adsorption of naphthalene onto SAC from aqueous solution.
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Journal of Central South University
·
2017
·Vol. 24
·期 8
·1727-1735
·
IF 0.601
Gao Zheng-cai,Li Li-qing,Li Hai-long,Chen Ruo-fei,Wang S.,Wang Yang-gang
A zeolitic imidazolate hybrid membrane (Co-IM-mIM) containing two imidazolate ligands deposited on a macroporous α-alumina support was prepared by pre-depositing and secondary growth technique. XRD, TGA and SEM characterizations demonstrate that a stable and thin, but dense and pure-phase Co-IM-mIM membrane can be obtained on the macroporous-alumina discs in Teflon-lined autoclave at 120 °C after pre-depositing by dip-coating at room temperature. No visible cracks, pinholes or other defects were observed on the membrane layer. The gas separation studies of Co-IM-mIM membrane were carried out at 25 °C and 1×10 5 Pa, showing ideal selectivity of 6.95, 5.25, 3.40 for H 2 /CO 2 , H 2 /N 2 and H 2 /CH 4 , respectively, and a permeance of 17.37× 10 −6 mol/(m 2 ·s·Pa) for H 2 . The influence of temperature and trans-membrane pressure on hydrogen separation and permeation was also carried out. The gas permeation and selectivity demonstrate that this membrane may have potential applications for efficient H 2 separation.
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FIBERS AND POLYMERS
·
2017
·Vol. 18
·期 11
·2204-2211
·
IF 1.113
Xu QingBo,Gu JiaYuan,Zhao Yang,Ke XiaTing,Liu XiangDong
L-cysteine (Cys) and silver nanoparticles (Ag NPs) were successfully linked onto the cotton fabric surfaces. The Cys molecules were covalently linked to the cotton fibers via esterification with the cellulose hydroxyl groups, and the Ag NPs tightly adhered to the fiber surface via coordination bonds with the Cys thiol groups. As a result, the Ag NPs coating on the cotton fabric showed an excellent antibacterial function with an outstanding laundering durability. The bacterial reduction rates (BR) efficiency reached 100 % for Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ). After 50 consecutive laundering cycles, the bacterial reduction rates (BR) against E. coli and S. aureus were maintained over 97 %. It has potential applications in a wide variety of fields such as sportswear, socks, and medical textile.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2017
·Vol. 410
·期 2
·573-584
·
IF 3.431
Liu Jiawei,Liang Yixun,Shen Jiwei,Bai Quan
Polymeric ionic liquids (PILs) with 1-vinyl-3-ethylimidazolium cations and two different anions of Br − and PF 6
− were assembled onto the surface of graphene (G) nanosheets. The derived two composites, i.e., PIL(Br)-G and PIL(PF 6 )-G, were further efficiently immobilized onto the surface of silica nanoparticles via self-assembly technique. The obtained two PIL-G/SiO 2 nanocomposites exhibited diverse adsorption performances toward proteins through adjusting the anions of PILs. Electrostatic attractions between proteins and the nanocomposites dominated protein adsorption, while the presence of PF 6
− anions weakened electrostatic interactions and deteriorated the selective adsorption of target protein, i.e., bovine serum albumin (BSA) in this case. Specifically, PIL(Br)-G/SiO 2 nanocomposite displayed high selectivity toward BSA and a high adsorption efficiency of ca. 98% was achieved for 100 mg L −1 BSA in a Britton-Robinson (B-R) buffer at pH 5. HPLC analysis demonstrated the selectivity of PIL(Br)-G/SiO 2 nanocomposite toward BSA in the presence of abundant hemoglobin and cytochrome c. The practical applicability was verified by performing selective isolation of human serum albumin (HSA) from human whole blood.
Selective isolation of human serum albumin from blood by polymeric ionic liquid assembled graphene immobilized silica nanocomposite with tunable anions
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Scientific Reports
·
2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Yu Bing,Song Qianqian,Cong Hailin,Xu Xiaodan,Han Dongwei,Geng Zhongmin,Zhang Xiaoyan,Usman Muhammad
In this paper, a thermo- and pH-responsive microfiltration membrane was prepared based on three-dimensional (3D) inverse colloidal crystals (ICC). To manufacture the smart ICC membrane, the typical thermo-responsive N-isopropylacrylamide (NIPAM) and pH-responsive methacrylic acid (MAA) were polymerized inside silica colloidal crystals. The smart ICC membranes were characterized by SEM, IR and contact angle measurements. Moreover, the permeability of smart microfiltration membrane was carried out by the KCl diffusion tests. The result showed that effective diameter of the polymer ICC membrane can be reversible tuned by temperature and pH. Besides, the functional ICC membrane showed outstanding temperature- and pH-responsive gating property, which was applied to separate particles of different sizes. The savvy environment-responsive gating membranes have potential uses in filtration, separation, purification, sensor and other applications.
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JOURNAL OF POROUS MATERIALS
·
2017
·Vol. 25
·期 3
·719-726
·
IF 1.624
Hu Xuebing,Yu Yun,Ren Shuang,Lin Na,Wang Yongqing,Zhou Jianer
To achieve superior separation performance in the phenol aqueous solutions treatment, a novel graphene oxide/Al 2 O 3 composite membrane was prepared by a spin coating process. The microstructure measurement shows that the composite membrane has a multilayer structure and graphene oxide has been tightly coated on the surface of the Al 2 O 3 membrane interlayer homogeneously. During the treatment of phenol aqueous solutions, the permeation flux and phenol rejection of the composite membrane were investigated. The results show the permeation flux of the membrane is about 1.153 L m −2 h −1 bar −1 and the phenol rejection of the membrane increases to 99.9% when the phenol concentration is 0.01 g L −1 . The high phenol rejection of the composite membrane is mainly attributed to the physical sieving, the solution–diffusion effect and the hydrophobic nature of graphene oxide. All these results indicate the GO/Al 2 O 3 composite membrane is a suitable material for the removal of phenol from aqueous solutions in environmental pollution management.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 10
·3833-3840
·
IF 4.58
Ma Liling,Sun Shan,Wang Yuhui,Jiang Kai,Zhu Jiali,Li Jun,Lin Hengwei
The authors describe a fluorometric nanoprobe for hypochlorite ion. It was prepared by covalently linking o-phenylenediamine to graphene quantum dots (GQDs). The probe displays green fluorescence with excitation/emission peaks at 440/534 nm. In the presence of chlorite, oPD is oxidized to form a quinone-iminium compound which induces a reduction in fluorescence intensity. The nanoprobe enables chlorite to be determined with a 69 nM limit of detection. The probe is highly selective, well water soluble and biocompatible. It was successfully employed in the determination of chlorite in spiked tap water and living cells. The method is believed to represent a promising tool for the determination of chlorite in environmental, biological and clinical samples.
A photoinduced electron transfer (PET) fluorimetric probe for chlorite detection based on o-phenylenediamine (oPD) modified graphene quantum dots (GQDs). It was applied to imaging of chlorite in MCF-7 cells.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 20
·15338-15344
·
IF 2.019
Tian Xinli,Yang Chuang,Si Lili,Si Gaoli
Here we report a flexible supercapacitor electrode fabricated via a simple method by applying a continuous polyaniline (PANi) coating on the surface of a cellulose nanofibers (CNFs) film. On one hand, we can recycle a large amount of bamboo fiber waste. On the other hand, we greatly improve the processing performance of PANi by making full use of CNFs’ superior mechanical properties. The flexible eco-friendly CNFs/PANi film can be directly used as an electrode without binder. SEM and FTIR measurements indicate there is a very secure combination between CNFs and PANi. The CNFs/PANi electrode boasts fine mechanical properties, excellent reversible performance and good specific capacitance (254.7 F/g at current density of 0.2 A/g). We expect the hybrid electrode will be used for flexible supercapacitor application.
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JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 52
·期 11
·6432-6441
·
IF 2.599
Ren Suxia,Zhang Xiuqiang,Dong Lili,Lei Tingzhou,Teng Zhaogang,Song Kunlin,Sun Xiuxuan,Wu Qinglin
Superparamagnetic nanorods consisting of cellulose nanocrystals (CNCs), ferrosoferric oxide (Fe 3 O 4 ), and surface-aminated silica (SiO 2 –NH 2 ) were synthesized for the first time for targeted biomedical applications (i.e., cell imaging). CNCs and Fe 3 O 4 were used as the template and magnetic property provider, respectively. The silica was functionized as magnetite core protector and rich amino group supplier. The synthesized nanorods exhibited a core–shell architecture (i.e., CNCs/Fe 3 O 4 core and aminated silica shell). Due to the coated silica shell, thermal stability of the nanorods was improved with the onset decomposition temperature increased by 135 °C compared with that of the uncoated CNCs. Because of the existence of the positively charged amino groups, the nanorods were easily linked with fluorescent dyes for cell imaging in biomedical applications.
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FIBERS AND POLYMERS
·
2017
·Vol. 17
·期 3
·396-401
·
IF 1.113
Zhang Haidong,Huang Yi,Wang Chenglong,Wang Lili,Shao Jianzhong
To decrease the pollution discharge and energy consumption resulting from textile finishing using the conventional pad-dry-cure process, a blue light-curable digital finishing for textile was innovatively proposed. Based on the mechanism of blue light curing technique, a combination of the blue light curing process and anti-UV finishing was established in this study. A blue light-curable anti-UV finishing solution containing oligomers, monomers, photoinitiators, and anti-UV agents was padded onto the surface of the cotton fabrics, and then cured to form a tough film under blue light irradiation. The ultraviolet protection factor (UPF) value of the finished cotton fabrics was 50, the top level of international standards, demonstrating excellent UV resistance. The finished cotton fabrics also showed good rubbing and washing durability, and acceptable handle. The integration of an anti-UV finishing with the blue light curing technique presents some unique advantages in terms of environmental protection and application potential.
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