JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 91
·期 1
·127-137
·
IF 1.986
Zhang Xiaojun,Chen Ting,Xu Yanqiao,Jiang Weihui,Liu Jianmin,Xie Zhixiang
Monoclinic bismuth vanadate (m-BiVO 4 ) yellow pigments were synthesized by non-hydrolytic sol-gel (NHSG) route without any surfactants. The presence of Bi–O–V band in the sol and xerogel, indicates that the excellent atomic scale homogeneity could be reached. It is beneficial to achieve high purity m-BiVO 4 phase and submicron scale particles (738 nm) with homogenous distribution at low temperature (400 °C), resulting in a brilliant yellow hue ( b * = 71.18, h ab = 89.73). These pigments have better chromatic performance than previously reported and commercially available BiVO 4 yellow pigments. Meanwhile, the cytotoxicity of the pigment was tested in Mus musculus skin melanoma cells, and showed nontoxic for human cells, indicating its potential application in the high quality paints for automotive and architectural finishes.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 29
·23187-23195
·
IF 2.779
Yi Junhui,Li Minghao,Xie Runkun,Liao Xiaoying,You Jinfeng,Chen Beifang,Liu Qiqi,Huang Weili
CuBi 2 O 4 is widely used in photocatalytic degradation for pollutants in water due to its strong visible light response characteristics, excellent chemical stability, non-toxic, and low cost. Here, stone-shaped CuBi 2 O 4 was prepared with CuO and Bi 2 O 3 as raw materials by high temperature solid phase. The effect of calcined temperature and time on the product was discussed. This material was analyzed and discussed by XRD, SEM, XPS, and DRS, and the visible light activity of degradation for Orange II was explored. The results showed that the absorption edge of prepared CuBi 2 O 4 expands to the visible region, and the band gap was about 1.77 eV. The photocatalytic degradation rate of Orange II was 42.6% under the optimal conditions. After H 2 O 2 assisted, the degradation rate was more than 2 times, and repeated experiments verified that the prepared catalysts had high stability. Finally, a reasonable mechanism of H 2 O 2 assisted degradation enhancement is proposed. This work gives new ideas for the preparation of new and efficient catalytic materials.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 28
·13767-13784
·
IF 3.553
Li Yulian,He Junyong,Zhang Kaisheng,Hong Peidong,Wang Chengming,Kong Lingtao,Liu Jinhuai
Abstract Magnetic porous manganese ferrite nanoparticles (Mn x Fe 3-x O 4 ) with diverse ingredient Mn/Fe mole ratios were synthesized to degrade sulfamethoxazole (SMX) antibiotic residues involving peroxymonosulfate (PMS) dissociation to produce free radical SO 4 •− , • OH and singlet oxygen 1 O 2 in the absence of heat and light. With the increase in proportion of manganese, the degradation efficiency of SMX increased from 19 to 70% in 30 min. The removal efficiency of SMX increased following the concentration increase of PMS (from 1 ~ 10 mM). After 60 min, the total organic carbon went down by 20%, and the concentration of NH 4 + and NO 3 − accumulated obviously simultaneously. EPR study and chemical probe method, depending on scavenging revealed that SO 4 •− , • OH and 1 O 2 were generated and contributed to the degradation system. Based on the capture of eleven decomposition by-products by LC/MS, two different degradation pathways of SMX were determined, mainly consisting of cleavage of the S–N bond, hydroxylation of benzene and heterocyclic ring, oxidation of amino group and ring-opening cleavage processes. The nanoparticle reuse tests showed that the porous magnetic manganese ferrite nanoparticles could still maintain a high degradation efficiency after five oxidative degradation reactions. The magnetic porous manganese ferrite nanocrystals could activate the PMS to oxidize SMX antibiotic residue without additional energy. Graphic abstract
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高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-13
·
IF 14.919
Ji Xixi,Lin Yanhong,Zeng Jie,Ren Zhonghua,Lin Zijia,Mu Yongbiao,Qiu Yejun,Yu Jie
Development of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS 2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH) x ) are successively grown on carbon fibers (CF/VGSs/MoS 2 /FeCoNi(OH) x ). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm −2 and small Tafel slope of 29.2 mV dec −1 . Theoretical calculation indicates that compositing of FeCoNi(OH) x with MoS 2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS 2 /FeCoNi(OH) x anode for overall water splitting, which generates a current density of 100 mA cm −2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 10
·13941-13947
·
IF 2.478
Liu Ying,Cao Bo,Zhang Xu,Luo Rong,Luo Chunhua,Lin Hechun,Peng Hui
Layered Co(OH) 2 has been regarded as a potential candidate for pseudocapacitor electrode material, but it is limited by its poor conductivity and low surface area. Herein, carbonated multi-walled carbon nanotubes (MWCNTs-COOH) were used to improve the conductivity of α-Co(OH) 2 nanocomposites. α-Co(OH) 2 nanoflowers were successfully grown and tangled with MWCNTs-COOH to form a randomly oriented network structure mediated by ammonia using water-methanol as co-solvent at room temperature. The capacitance performances of the obtained α-Co(OH) 2 @MWCNT-COOH composites were investigated to find that MWCNT-COOH improved the specific capacitance efficiently. Especially, in the presence of 20% in mole of MWCNT-COOH, the composite gave rise to the high specific capacitance of 1027 F/g at the current density of 2 A/g with good cycle stability, whose specific capacitance remained 78% of its original even after 5000 cycles at 30 A/g current. The large surface area and strengthening the conductivity of the composites lead to the improvement of efficiency in charge/discharge process.
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高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 11
·6745-6758
·
IF 3.809
Liu Xiao-hui,Zhang Yan-guang,Cheng Bo-wen,Ren Yuan-lin,Zhang Qiu-yan,Ding Chen,Peng Bo
Abstract Cellulosic fibers are usually finished with flame retardant via repeated pad-dry-cure processes. The present contribution reports a simple, facile, and one-pot chemical treatment process to access durable flame retardant lyocell fibers by directly immersing the fibers into the solution of a flame retardant ester of 2,2-ethanolamine diphosphoric acid (EADP) and urea for a certain time without using catalyst and cross-linker. As demonstrated, the treated lyocell fibers with grafted EADP show excellent flame retardancy and durability, as evidenced by an increase of limiting oxygen index value up to 37.8% and still 25.6% after 40 washing cycles. The key to success is ascribed to the formation of three dimensional flame retardant structures with EADP. Various analytical techniques, including raman spectroscopy, scanning electron microscope, thermogravimetry, and TG-infrared coupled technique prove that the carbonaceous residue and non-combustion gases were preferably generated during thermal decomposition process of treated fibers. Microcombustion calorimetry results revealed a significant reduction in the peak of heat release rate. The results indicate that EADP is potential for using as an efficient durable flame retardant of lyocell fibers. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 7
·2741-2749
·
IF 3.442
Meng Cheng,Li Wenqi,Ren Chunrong,Zhao Junchuan
Powellite ceramic represents a waste form matrix material to immobilize minor actinides and Mo from reprocessed UMo nuclear fuel. In this paper, the Ca 1−x Li x/2 Gd x/2 MoO 4 (0 ≤ x ≤ 1) series is prepared by solid-state reaction using Gd 3+ as trivalent minor actinide (Cm 3+ ) surrogate, and the structure/microstructure is characterized by XRD, HRTEM, Raman spectroscopy and SEM. Rietveld refinements show that the couple (Gd 3+ and Li + ) enters into the eightfold coordinated Ca site of the powellite structure. With the increase in the contents of Gd and Li, Raman bands broaden due to the distortion of MoO 4 tetrahedra and disordered arrangements of Gd 3+ and Li + . The chemical durability analyzed by the PCT-B indicates that the leaching behaviors of Gd and Mo are related to the interfacial dissolution–reprecipitation mechanism. For the Ca 0.5 Li 0.25 Gd 0.25 MoO 4 ceramic, 7-day NL Gd and NL Mo are shown in the order of ~ 10 −4 and ~ 10 −4 g m −2 , respectively. Thus, our initial results of the structure and chemical durability will provide insights to design new single- or multiphase waste forms for the Mo-rich HLW conditioning.
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高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2017
·Vol. 26
·期 4
·1559-1572
·
IF 1.877
Wang Jianguo,Chen Nan,Li Miao,Feng Chuanping
In this study, a novel adsorbent was developed by loading polypyrrole (PPy) onto biochar (BC) prepared by slow pyrolysis of pomelo peel. This PPy-grafted BC mainly exhibited anion-exchange behavior, which dramatically increased fluoride adsorption capacity. The effects of various factors (adsorbent dosage, pyrrole concentration, initial solution pH, co-existing anions and temperature) on the fluoride adsorption were investigated. The adsorbent was characterized by scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and automatic titration methods. Results showed that the optimized adsorbent (BP-0.1) performed excellently at pH 2.8–10.0, and possessed positive charge at pH < 8.6. The adsorption isotherm data were fitted well by the Langmuir model and the maximum adsorption capacity was 18.52 mg/g at 25 ± 2 °C. The adsorption kinetics followed the pseudo-second-order model and adsorption equilibrium was achieved at 24 h. Although both HCO 3
− and CO 3
2− had great influence on F − adsorption, there was no significant impact in the presence of Cl − , NO 3
− and SO 4
2− . Real groundwater study showed that 2.5 g/L of BP-0.1 could effectively reduce F − from 10.0 to 1.4 mg/L at pH 5.0. Thermodynamic parameters confirmed the spontaneous and endothermic nature of the adsorption process. Effect of pH, XPS analysis and the change of amount between Cl − and F − in the adsorption process revealed that ion exchange and electrostatic attraction were involved in the adsorption process and ion exchange was the main adsorption mechanism.
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高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 7
·2221-2227
·
IF 4.831
Lin Yanping,Yao Bixia,Huang Tingting,Zhang Shichao,Cao Xiaotong,Weng Wen
The authors report that nitrogen-doped carbon dots (N-CDs) represent a viable fluorescent probe for the determination of dissolved free chlorine. The N-CDs can be fairly easily prepared by a solvothermal method using citric acid, tartaric acid and ethanediamine as the precursors, display excitation/emission maxima of 360/460 nm, and have a quantum yield of 42.2 %. Free chlorine and ClO − quench fluorescence, and this was exploited to design a method for fluorometric determination of chlorine and hypochlorite. The probe has a short response time (< 1 min), excellent selectivity, high sensitivity, and a linear response range that extends from 0.1 to 27 μM. The limit of detection is as low as 29.7 nM. The method was applied to the determination of chlorine dissolved in tap water.
Fluorescent nitrogen-doped carbon dots (N-CQDs) displaying excitation/emission maxima of 360/460 nm were fabricated by a one-pot solvothermal method. The photoluminescence (PL) of the N-CQDs is quenched by free chlorine and ClO − , and this was exploited to design a method for fluorometric determination of chlorine and hypochlorite.
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高影响因子
Scientific Reports
·
2021
·Vol. 11
·期 1
·1-12
·
IF 4.38
Tang Long,Jiang Jianchun,Song Guoqiang,Wang Yajing,Zhuang Ziheng,Tan Ying,Xia Yan,Huang Xianfeng,Feng Xiaoqing
A series of urolithins derivatives were designed and synthesized, and their structures have been confirmed by 1 H NMR, 13 C NMR, and HR-MS. The inhibitory activity of these derivatives on phosphodiesterase II (PDE2) was thoroughly studied with 3-hydroxy-8-methyl-6 H -benzo[C]chromen-6-one and 3-hydroxy-7,8,9,10-tetrahydro-6 H -benzo[C] chromen-6-one as the lead compounds. The biological activity test showed that compound 2e had the best inhibitory activity on PDE2 with an IC 50 of 33.95 μM. This study provides a foundation for further structural modification and transformation of urolithins to obtain PDE2 inhibitor small molecules with better inhibitory activity.
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2014
·Vol. 181
·期 11
·1341-1351
·
IF 3.719
Qiao Li,Gan Ning,Hu Futao,Wang De,Lan Hangzhen,Li Tianhua,Wang Hongfei
We report on the preparation of magnetic nanoparticles coated with a surface imprinted polymer for use in the preconcentration of diethylstilbestrol (DES). The magnetic molecularly imprinted nanoparticles (m-MINPs) were fabricated by first coating magnetite nanoparticles with a layer of Nafion which is polyanionic. Next, the resulting particles were coated with polydopamine (which is polycationic at near-neutral pH values) in the presence of DES as a template. The thickness of the coating containing the DES template is quite thin so that it can be removed within 18 h. The m-MINPs devoid of DES have a typical diameter of 500 nm and exhibit fast adsorption kinetics and sensitive magnetic response to a magnet. The m-MINPs can recognize DES with high specificity over many other estrogens (separation factor β >1.9) and were employed for the dispersive solid-phase extraction of DES which then was quantified by HPLC. The method was applied to determine DES in (spiked) milk powder samples. The recoveries ranged from 90.7 to 105.2 % (intra-day) and from 85.5 to 102.3 % (inter-day) at spiking levels of 10, 50, and 100 ng g −1 . The linear ranges were 3.5–1,000 ng g −1 with the correlation coefficient of 0.9983. The detection limit was 0.99 ng g −1 of milk powder. The m-MINPs are reusable. After 12 adsorption-elution cycles, the recovery was still higher than 80 %.
We report on the preparation of magnetic nanoparticles coated with a surface imprinted polymer for use in the preconcentration of diethylstilbestrol (DES). The method was applied to determine DES in (spiked) milk powder samples with recoveries ranged from 90.7 to 105.2 % (intra-day) and from 85.5 to 102.3 % (inter-day) at spiking levels of 10, 50, and 100 ng g −1 .
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2022
·Vol. 24
·期 12
·1-13
·
IF 2.533
Wang Huijie,Yu Xiaoli,Li Qixian,Zhu Jingru,Ding Juan,Jiang Tingting
Overuse of antibiotics has led to the emergency of vancomycin-resistant Enterococcus (VRE), considered one of the leading causes of severe diseases and even death. The phototherapy strategy of combined photothermal therapy (PTT) and photodynamic therapy (PDT) has achieved considerable attention since it could effectively enhance synergistic efficacy and avoid new drug resistance. In this paper, a kind of hybrid nanocomposite was fabricated and applied in the phototherapy-based combination strategy against VRE pathogens, in which graphene oxide (GO) not only covalent conjugated with vancomycin (Van) but also loaded photosensitizer phthalocyanine (Pc) via π–π stacking interaction. Outstanding PTT and PDT effects were observed in the as-prepared nanocomposite (GO@Van@Pc), giving almost 2–3 logs of bacterial reduction in vitro. Similar data were also obtained when GO@Van@Pc was used to treat VRE-infected BALB/C mice, exhibiting obvious infection regression and accelerated wound healing with negligible damage to normal cells and major organs. Therefore, the as-prepared GO@Van@Pc integrating PTT and PDT has great potential in the phototherapy of drug-resistant pathogens. Graphical Abstract
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高影响因子
危险品化学品经营许可证（带存储）