JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 93
·期 2
·419-427
·
IF 1.986
Niu Ping,Li Chunhui,Jia Chunxiao,Wang Dunqing,Liu Shuwu
Fibrous cobalt ferrite catalyst was synthesized using the sol–gel method combined with celloulose template. This technology can exactly reproduce the microstructure of cellulose template on nanometer level. The obtained cobalt ferrite was characterized by field emission scanning electron microscope (FESEM), x-ray diffractometry (XRD), fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometer. Cobalt ferrite exhibited high efficiency to activate peroxymonosulfate (PMS) for the degradation of Acid Orange 7. The effects of experimental parameters including initial pH values of dye solution, effect of concentrations of PMS and CoFe 2 O 4 on Acid Orange 7 degradation were studied. Furthermore, CoFe 2 O 4 also displayed an extremely high catalytic performance in the degradation of Methyl Orange, Reactive Brilliant Red X-3B, Methylene Blue and Rhodamine B. CoFe 2 O 4 retained high degradation efficiency and high stability even after being reused for five runs. The inherent magnetism of ferrite leads to easy separation of catalyst from the reaction mixtures. Consequently, the catalyst durability is improved remarkably.
CoFe 2 O 4 magnetic fiber nanomaterial was synthesized using the sol–gel method combined with celloulose template and exhibited high catalytic activity for AO7 degradation in presence of peroxymonosulfate.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-12
·
IF 2.8
Yin Lixiong,Guo Yao,Liu Changqing,Li Luyao,Fan Dejiang,Huang Jianfeng,Zhang Qinghua,Wang Tao,Chen Yufei
Carbon-based organic-inorganic perovskite solar cells (C-PSCs) are low-cost photovoltaic cells. However, the carrier recombination caused by interface defects and the mismatched interface energy level limits the further improvement of the efficiency of C-PSCs. In this work, SmCl 3 was introduced as a “double-sided” modifier to achieve interfacial modification. After modified, Cl − passivated the oxygen vacancy defects on the TiO 2 surface. Meanwhile, Sm 3+ was diffused into the perovskite interface in the form of a concentration gradient, which balanced the non-coordinated Pb 2+ and improved the energy level arrangement. Due to good interfacial contact, the reduced interfacial non-radiative recombination, and rapid charge extraction and transport, the optimized C-PSCs efficiency was increased from 11.03 to 13.4%. In addition, the unencapsulated champion PSC remained stable for long-term stability after the sustained attack for 800 h at room temperature of 20% RH. This work proposed a straightforward interface modification strategy to improve the efficiency of C-PSCs.
✓ 已验证
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2015
·Vol. 293
·期 7
·1893-1902
·
IF 1.865
Zhang Feng,Yu Songtao,Hou Guihua,Xu Ning,Wu Zhaofeng,Yue Lu
A facile method to synthesize core-shell iron oxide/polymer nanospheres has been developed. Oleic acid-modified iron oxide nanoparticles were first prepared by the coprecipitation method. The iron oxide nanoparticles were then assembled into colloidal magnetic nanoparticle clusters (MNCs) by a miniemulsion-based assembly approach. The size of the MNCs can be tuned from about 50 nm to about 93 nm by rationally designing the experimental conditions. Magnetic iron oxide/poly(methyl methacrylate-co-divinylbenzene) (P(MMA-co-DVB)) nanospheres with well-defined core-shell structure and uniform size were finally prepared by seeded emulsion polymerization with the MNCs as the seeds. By the same procedure, core-shell iron oxide/poly(styrene-co-divinylbenzene) (P(St-co-DVB)) nanospheres were also successfully fabricated, demonstrating the versatility of the preparation method. The prepared composite nanospheres have uniform size, high saturation magnetization, and easily functionalized surface, promising for further biomedical applications and liquid phase catalysis.
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2010
·Vol. 169
·期 3
·321-326
·
IF 2.648
Song Wei,Zhang Lei,Shi Lei,Li Da-Wei,Li Yang,Long Yi-Tao
We are presenting a strategy for the fabrication of disposable screen-printed electrodes modified with mercury nano-droplets and capable of sensing heavy metal ions. They were prepared by coating electrodes with a mixture of multi-walled carbon nanotubes and chitosan, this followed by adsorption of mercury. The resulting sensor was characterized by cyclic voltammetry and impedance spectroscopy. Also the effects caused by adsorption of mercury were investigated. It is shown that square wave anodic stripping voltammetry enables simultaneous determination of cadmium(II), lead(II) and copper(II), for which detection limits of 12, 23 and 20 nM, respectively, are found. Relative standard deviations for ten determinations at 0.6 µM concentrations of these ions are in the range of 3.0 to 5.7%. The applicability was tested by analyzing river water and showed recoveries between 94.1 and 104.6%, thus demonstrating its utility for in-field monitoring of these heavy metal ions.
✓ 已验证
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2015
·Vol. 25
·期 4
·897-905
·
IF 1.927
Li Li,Zhang Qiaolin,Ding Yaping,Lu Yaxiang,Cai Xiaoyong,Yu Lurong
Based on the quenching of the fluorescence intensity of thioglycolic acid (TGA)-capped core-shell CdTe/ZnS nanoparticles (NPs) by vanillin, a novel, simple and rapid method for the determination of vanillin was proposed. In aqueous medium, the functionalized core-shell CdTe/ZnS NPs were successfully synthesized with TGA as the capping ligand. TGA-capped core-shell CdTe/ZnS NPs were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy. Factors affecting the vanillin detection were investigated, and the optimum conditions were also determined. Under the optimum conditions, the relative fluorescence intensity of CdTe/ZnS NPs was linearly proportional to vanillin over a concentration range from 9.4 × 10 −7 to 5.2 × 10 −4 M with a correlation coefficient of 0.998 and a detection limit of 2.6 × 10 −7 M. The proposed method was also employed to detect trace vanillin in cookies with satisfactory results.
✓ 已验证
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2021
·Vol. 32
·期 1
·161-168
·
IF 3.543
Qin Yuanyuan,Wang Xiu,Shi Minxin,Huang Yuhua,Liu Xiaogang,Li Xiancai
In this paper, APTES was used as the functional monomer, reamed MCM-41 was used as the carrier, and epichlorohydrin was used as the crosslinking agent to prepare the Lanthanide ion-imprinted polymer, La-IIP. The effects of pH, time, temperature, and initial concentration on La-IIP adsorption were investigated, and the adsorption mechanism was discussed by fitting the adsorption data to various kinetic and thermodynamic models. The results showed that La-IIP reached adsorption equilibrium in 20 min at 338 K and pH = 5, and the maximum adsorption capacity was 272.2 mg/g. The La-IIP adsorption process conformed to the Langmuir adsorption model, and La-IIP showed strong selectivity for La(III) in the presence of interfering ions with similarproperties. 2 M hydrochloric acid solution was used to eluate La-IIP and re-adsorb lanthanum ion solution. After elution of La-IIP for five times, the adsorption remained at the initial value of 81%. It shows that La-IIP has stability and reusability.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 12
·13161-13170
·
IF 1.798
Qin Tianxiu,Zhang Shuxia,Chen Pei,Zhao Fengqi,Gao Hongxu,Chen Xinbing,An Zhongwei
TiO 2 nanocrystals are inserted in the pores of monodispersed mesoporous SiO 2 nanospheres with 20–35 nm diameter by a facile two-step method involving vacuum-rotary evaporation and subsequent calcination. Characterization by XRD, TEM, EDX, FT-IR and N 2 sorption techniques suggests that, the pores of the mesoporous SiO 2 nanosphere can effectively stabilize the anatase phase of TiO 2 nanocrystals with size about 6 nm even at high temperature of 750 °C. The photocatalytic activities of the samples with different TiO 2 loading amount were evaluated by the degradation of Rhodamine B dye in aqueous solution under UV-light irradiation. It is found that photocatalytic efficiencies of these materials are much better than commercial P25. Where the sample with TiO 2 loading of 43 % exhibits the highest photocatalytic efficiencies with complete degradation of Rhodamine B within 32 min, which is attributed to the balance between high surface area and suitable TiO 2 loading amount.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 22
·20315-20324
·
IF 2.22
Tan Yang,Zhang Zheng,Guo Fuqiang,Guo Renqing,Bai Haineng,Zhang Baohua,Li Xin,Yang Qian,Liu Xuebo
In this study, multi-shaped CdS was synthesized by hydro- and solvothermal methods. Interestingly, the results of scanning electron microscopy and transmission electron microscopy showed that branch-like CdS could be transformed into ball-like and flake-like in deionized water by ethylenediaminetetraacetic acid and l -cysteine, respectively, and the growth mechanism of CdS was discussed and explored: the ion-binding rate might be the main factor for the morphology transformation of CdS. X-ray diffraction and energy dispersive spectroscopy revealed branch-like CdS which exhibited the hexagonal phase. Besides, the optical characteristics of CdS were performed by ultraviolet–visible and photoluminescence spectrum. Also, CdS was utilized to explore the photocatalytic activity of rhodamine B, and the result showed that the photocatalytic activity of ball-like CdS was higher than flake-like and branch-like CdS.
✓ 已验证
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2018
·Vol. 50
·期 1
·242-250
·
IF 1.834
Xiao Jiusan,Wang Qi,Jiang Bo,Zhu Hongmin
Carbothermic selective reduction of titanium concentrate ore for the preparation of titanium oxycarbide was presented and SiO 2 was found to be partly reduced during the process. The equilibrium relationship between Si dissolved in metallic Fe and SiO 2 existed in corresponding slag was analyzed thermodynamically, and then revealed by a series of designed equilibration experiments. The results are in accordance with the calculated values obtained from thermodynamic analysis and have well explained the phenomenon that part of SiO 2 is reduced during selective reduction processing of titanium concentrate ore.
✓ 已验证
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2020
·Vol. 299
·期 4
·595-601
·
IF 1.536
Liu Li,Jiang Jianchun,Xu Zhan,Zhou Jiahang,Li Yunbo
Flexible, transparent and conductive films (TCFs) were prepared with silver nanowires (AgNWs) and the conductivity was enhanced via tuning junction resistance between nanowires treated by different surfactants and encapsulated by poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS). The results showed that the conductivity of AgNW TCFs was obviously enhanced after being immersed into surfactant solutions because the AgNWs would approach each other directly after dislocating away from polyvinyl pyrrolidone (PVP) and the junction resistance sharply decreased. Moreover, the transmittance of AgNW TCFs immersed into different surfactant solutions just decreased little because the halogen ions induced the formation of silver nanoparticles on the surface of AgNWs. Besides, the conductivity of AgNW TCFs encapsulated by PEDOT:PSS was also enhanced because the charges can transfer between PEDOT chains and AgNWs with the little decrease of optical transmittance. Graphical abstract The characterization of the electrical properties of AgNW TCFs and AgNWs/PEDOT:PSS films treated by different surfactants (CTAB, CTAC and OTAC).
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 51
·期 12
·5834-5842
·
IF 2.302
Hu Yong,Gu Da Wei,Li Fan,Qi Xiang Chun,Yang Kai Hua,Liu Xun Dao,Li Hong,Zhang Yong Ming
Fluorinated block copolymers poly(2,3,4,5,6-pentafluorostyrene)- b -poly(styrene) (PFS- b -PS) synthesized by atom transfer radical polymerization was functionalized with quaternary ammonium base groups via chloromethylation of PFS- b -PS, followed by reactions with trimethylamine and ion exchange with KOH to prepare anion exchange block polymer electrolytes (AEBPEs). The challenges and limitations during the synthesis are discussed. A comparative study on the chloromethylation of PFS- b -PS with two kinds of chloromethylation agents is carried out. The thermal stability, morphology, and conductivity of the obtained AEBPEs (PFS- b -QAPS(OH)) were investigated by thermogravimetry analysis, differential scanning calorimeter, small-angle X-ray scattering, and AC impedance, respectively.
✓ 已验证
DOI
高影响因子
Journal of Advanced Ceramics
·
2021
·Vol. 10
·期 6
·1326-1337
·
IF 6.707
Li Ke,Rao Jiancun,Ning Congqin
The novel dental ceramics can be fabricated at lower temperatures when sol-gel derived lithium disilicate glass ceramics (LDGC) was used as an additive for yttria stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics. The effect of LDGC on the sintering, mechanical, and translucent properties of Y-TZP ceramics was investigated in the present study. The results showed that the LDGC additive effectively improved the densification of Y-TZP at 1100 °C, which was much lower than the sintering temperature for pure Y-TZP. When sintered at 1100 °C, the Y-TZP with 1 wt% LDGC reached a relative density of 95.45%, and prossessed a flexural strength of 482.4 MPa and a fracture toughness of 5.94 MPa·m 1/2 . Moreover, its translucency was also improved. While, the addition of LDGC could result in an escape of yttrium atoms from the grain lattice of zirconia, which induced the tetragonal-monoclinic transformation of zirconia and abnormal growth of monoclinic grains. The escaped yttrium atoms diffused into the intergranular glass phase. The results indicated that the novel Y-TZP-LDGC ceramics has a great potential to be used for all-ceramic restorations.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）