RSC Advances
·
2020
·Vol. 10
·期 19
·11210-11218
·
IF 3.119
Yan Zhang,Fengsong Qi,Yujian Liu
The high B-doped ordered mesoporous carbon (HPB-OMC) was prepared by using 4-hydroxyphenylboronic acid-modified phenolic resin (HPBPF) as a boron and carbon precursor via the evaporation-induced self-assembly (EISA) approach. The chemical composite, mesoporous structure, and electrochemical properties of the as-prepared HPB-OMC are investigated. The results show that both highly boron-doped and well-ordered mesoporous structure are achieved for HPB-OMCs, owing to the improvement of solubility of the resins in ethanol, and the enhancement of thermal stability of pore channels during carbonization. Moreover, the HPB-OMCs exhibit an ideal electric double-layer capacitor performance. With the increase of the B-doped content, the specific capacitance of the HPB-OMC electrode rises gradually, then drops off a little. The HPB-OMC with a high B content (3.96 wt%) shows a much high specific capacitance of 183 F g−1 at a current density of 1 A g−1, suggesting its promising application in the field of supercapacitors.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Weiguang Ran,Jiayi Geng,Ziyou Zhou,Chunyuan Zhou,Fukai Wang,Ming Zhao,Tingjiang Yan
The development of efficient and thermally stable narrow-band-emitting phosphors is crucial for wide color gamut display applications. Herein, we have developed a novel narrow-band green-emitting RbK2Na(Li3SiO4)4:Eu2+ phosphor with remarkable luminescence properties. The phosphor exhibits a main green emission band at 535 nm, with a narrow full width at half maximum of 51 nm, attributed to its unique rigid structure and highly symmetric cationic sites. Furthermore, it demonstrates excellent thermal stability, retaining 90.95% of the integrated emission intensity at 500 K compared to that at 100 K, and exhibits a high internal quantum efficiency of 82.51%. By combining RbK2Na(Li3SiO4)4:5%Eu2+ with commercial red K2SiF6:Mn4+ phosphors and blue GaN chips, a white light-emitting diode device with a wide color gamut (103% NTSC) was prepared, demonstrating the potential of the RbK2Na(Li3SiO4)4:Eu2+ phosphor for liquid-crystal backlight applications.
研究领域:
材料科学
·
光电技术
·
显示技术
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Hanxun Qiu,Feilong Qiu,Xuebin Han,Jing Li,Junhe Yang
Here we report an environmentally friendly, one-pot strategy toward preparation of nickel nanoparticle-decorated reduced graphene-oxide (Ni-RGO) nanostructures, by employing Ni(AC) 2 as nickel source and ethylene glycol as both solvent and reducing agent via a facile microwave irradiation heating approach. The results show that Ni nanoparticles with an average diameter of around 40 nm are homogeneously anchored onto the surface of RGO sheets. As compared to the pure Ni nanoparticles and RGO sheets, Ni-RGO composites with over 64 wt% loading of Ni nanoparticles possess superior catalytic activities and selectivity toward the reduction of 4-nitrophenol. The corresponding kinetic reaction rate constant (defined as κ ) is even four-fold compared to pure Ni nanoparticles. Such promising composites show great potential for friendly treatment of industrial waste containing nitrophenol in a simple, sustainable and green way.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2021
·
IF 4.354
Qingqiang Tian,Shasha Xu,Chiying Zhang,Xinyi Liu,Xiangwei Wu,Yahui Li
Herein, an interesting palladium-catalyzed procedure for the direct carbonylative thiomethylation of aromatic amine derivatives with 4-methylthio-2-butanone is developed. Using 4-methylthio-2-butanone as (methylthio) transfer agent, a variety of corresponding thioesters are obtained with moderate to good yields under base-free condition. In addition, good functional group tolerance can be observed.
研究领域:
有机化学
·
合成化学
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DOI
PubMed
高影响因子
JOURNAL OF TOXICOLOGICAL SCIENCES
·
2016
·Vol. 41
·期 3
·371-381
·
IF 1.224
Wei-Feng Xu,Yan-Sen Li,Peng-Yuan Dai,Chun-Mei Li
4-nitrophenol (PNP) is generally regarded as a diesel exhaust particle (DEP). Arginine plays an important role as a new feed additive, possessing highly efficient antioxidant activities. Here we investigated the effects of dietary supplementation with arginine against ovarian damage induced by PNP in rats. A total of thirty-two female rats postnatal day 28 (PND 28) were randomly divided into four groups. Two groups were fed with basal diet or 13 g/kg arginine in diet for 4 weeks, respectively; the other two groups were given PNP (100 mg/kg b.w.) daily by subcutaneous injection for 2 weeks following pretreatment with either basal diet or arginine diet for 2 weeks. The values of body weight gain (BWG), average daily gain (ADG) and percentage weight gain (PWG) upon PNP treatment were significantly reduced than those in other groups. The relative liver weight in the PNP group was significantly decreased compared with the control group. Treatment with PNP significant reduced the number of corpora lutea, although serum 17β-estradiol (E2) and progesterone (P4) concentrations were unchanged. The morphology of the ovaries in PNP-treated rats displayed necrosis, follicular deformation and granulosa cells irregular arrangement. Moreover, exposure to PNP enhanced production of malondialdehyde (MDA) and hydrogen peroxide (H2O2), and decreased the activities of total superoxide dismutase (T-SOD) and catalase (CAT), and the co-administration of arginine can attenuate the oxidative stress caused by PNP. These results suggest that arginine may have a protective effect against ovarian damage induced by PNP owing to its antioxidant capacity effect.
研究领域:
毒理学
·
生殖生物学
·
营养学
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DOI
PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
Wang Jiachen,Li Jinxin,Xie Mengjiao,Quan Xie,Liu Yanbiao
The electrocatalytic upcycling of halogenated pollutants into value-added chemicals presents a sustainable frontier, yet precise transformation pathways remain challenging. Here, we report a pulsed electrocatalytic strategy that exploits a temporal modulation to realize a dynamic coordination mechanism, enabling the sequential conversion of 4-chlorophenol (4-CP) to para -benzoquinone ( p -BQ) over an N, O-dual coordinated Fe single-atom catalyst (FeN 2 O 2 SAC). Diverging from conventional continuous electrolysis, pulsed catalysis spatiotemporally decouples cathodic dechlorination and anodic oxidation, exerting precise control over transient intermediate populations. In situ spectroscopy and density functional theory reveal that pulse polarization drives a dynamic chloride-coordination process at the Fe center. This transient ligand-field modulation optimizes the adsorption energetics and lowers the thermodynamic barrier. Consequently, the FeN 2 O 2 SAC achieves a 4-CP conversion of 94.8% and a p -BQ yield of 62.6%, outperforming the FeN 4 architecture. This system demonstrates long-term durability in flow electrolyzers alongside a reduced carbon footprint. By coupling pulsed electrocatalysis with dynamic coordination chemistry, this work establishes a paradigm for “pollutant-to-product” conversion, offering a scalable blueprint for circular chemical economies.
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 43
·36256-36263
·
IF 3.289
Huiqi Wang,Shigang Wei,Huihui Zhang,Qiong Jia
A functionalized calix[4]arene (alkenyl@C[4]A) was introduced into the poly(butyl methacrylate-ethylene dimethacrylate) monolith inside a capillary to prepare a polymer monolith microextraction (PMME) material (poly(BMA-alkenyl@C[4]A-EDMA)). Various techniques, including scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermo-gravimetric analysis, were employed to characterize the synthesized poly(BMA-alkenyl@C[4]A-EDMA) monoliths. A new method was developed for the preconcentration and analysis of bisphenols using PMME coupled with high performance liquid chromatography (HPLC). Under the optimized conditions, the monolithic column afforded acceptable linearities, low limits of detection, and good intra-day/inter-day relative standard deviations. The method was applied to the determination of bisphenols in human serum samples with recoveries ranged from 77.6% to 109.7%.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Dan Chen,Huining Zhang,Kai Yang,Hongyu Wang
In this work, 4-aminothiophenol and 3-aminopropyltriethoxysilane were firstly used to functionalize graphene oxide (GO) in order to promote the sorption efficiencies of methylene blue (MB) and copper (Cu 2+ ). Characterization experiments illustrated that sulfydryl group ( SH) and amino group ( NH 2 ) were existed onto 4-aminothiophenol modified GO (GO-SH) and 3-aminopropyltriethoxysilane modified GO (GO-N), respectively. Adsorption isotherm results showed that the maximum adsorption capacities of MB by GO-SH and GO-N were 763.30 and 676.22 mg/g, which was much higher than original GO 455.95 mg/g. For Cu 2+ adsorption, the maximum adsorption capacities by GO-SH and GO-N were 99.17 and 103.28 mg/g, suggesting that the engineered GO exhibited greater Cu 2+ sorption ability than original GO 32.91 mg/g. Both MB and Cu 2+ removal rates increased with pH and adsorbent dosage increased, while the sorption rates weakly reduced with increasing ionic strength. The modification by SH and NH 2 would not only increase the sorption sites, but also cause chelation with heavy metals, and thus improving the sorption capacities of MB and Cu 2+ .
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2019
·
IF 4.978
Xian-Fei Huang,Guang-Ping Yuan,Guan Huang,Su-Juan Wei
Aiming at the most enhancing the catalytic performance of simple and cheap cobalt(II) 5,10,15,20-tetrakis(4-pyridyl)porphyrin (Co TPyP), guided by the nowadays-advanced various technologies, Co TPyP was anchored onto nanoporous bar with thiol-functionalized silica (npb-SiO 2 -SH). The resulting npb-SiO 2 -S-Co TPyP catalyst was characterized using various techniques, determining its structure. The total surface area ratios (TSAR) of the immobilized cobalt porphyrin to the npb-SiO 2 -SH, and the catalytic cyclohexane oxidation reaction conditions were at the same time optimized via Response Surface Methodology (RSM). Compared with those obtained from traditional optimizing method (TOM), on average, RSM could enhance as high as more than 60% catalyst turnover frequency (TOF) and yields of cyclohexanone and cyclohexanol (KA oil). The anchored 0.05 mg Co TPyP could catalyze the oxidation of 200 mL of cyclohexane, under not using any solvents and additives, offering 2.5 × 10 6 1/h of TOF, and 19% of yields. The npb-SiO 2 -S (20%-0.0438)-Co TPyP catalyst showed better reusability, excellent catalytic
研究领域:
化学工程
·
材料科学
·
催化反应
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DOI
高影响因子
ELECTROANALYSIS
·
2023
·Vol. 35
·期 9
·e202300064
·
IF 3
Jinjin Zhang,Wenjing Liu,Qi Wang,Jianying Qu
In this work, two-dimensional cobalt metal organic framework nanosheets ( CoTP ) were prepared by the simple hydrothermal reaction of cobalt nitrate hexahydrate with terephthalic acid, and then calcined at a high temperature under the environment of nitrogen to obtain cobalt carbon nanomaterials ( Co-CNs ). The gold nanomaterials ( AuNPs ) were prepared by redox reaction. The prepared materials were characterized and analyzed by XRD, SEM and IR. A novel electrochemical sensor ( AuNPs/Co-CNs ) was constructed successfully on a glassy carbon electrode combining Co-CNs with AuNPs , which showed significant electrocatalytic activities for acetaminophen ( PA ) and 4-aminophenol ( 4-AP ) and could be used to detect them simultaneously. Under the optimal conditions, the linear ranges for determination of PA and 4-AP were 0.50–250.00 μM and 0.50–350.00 μM with the detection limits of 0.11 μM and 0.10 μM, respectively. Compared with other related reports, the proposed sensor exhibits a wider linear ranges, good sensitivity, accuracy and selectivity with potential applications in real sample analysis.
研究领域:
分析化学
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材料科学
·
医学检测
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DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Hang Xu,Shaokang Wang,Fengmin Wu,Qinlin Yuan,Yafei Guo,Yinke Zhang,Xuefeng Wei,Jun Zhang
One of the disadvantages of using inorganic solid catalysts is the formation of solid waste. The use of fully-organic solid catalysts can reduce secondary pollution by simple combustion or bio-degradation. Here, an organic polymerization carrier, calix[4]resorcinarene, with polyhydroxyl characteristics, was synthesized. A cobalt containing ionic liquid was successfully chemically bonded to the hydroxyl groups on the carrier surface using 3-chloropropyltrimethoxysilane as linking agent. The resulting fully-organic supported ionic liquid catalyst was coupled with oxone for desulfurization. The micro-structure of the catalyst was composed of a porous spatial network structure. The reaction system exhibited excellent dibenzothiophene (DBT) removal (93.3%) after 90 min under the optimum experimental conditions (20 °C, 6 g of model oil with an initial sulfur content of 1000 ppm, 0.2 g of 20 wt% oxone solution with a dosage frequency of three, 15% of CoCl 2 , 0.15 g of catalyst, and 2 g of [Bmim]BF 4 ). After six regeneration cycles, the sulfur removal remained above 90%. The desulfurization kinetics and mechanism were also discussed, and it was found that the hyperbolic model provided a better fit to the experimental data compared to the pseudo first-order model. The likely mechanism involves DBT being extracted using the ionic liquid [Bmim]BF 4 before being oxidized by the catalyst/oxone system to form DBTO 2 , which is easily removed from the system using polar solvents.
研究领域:
化学工程
·
环境科学
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DOI
高影响因子
POLYMER JOURNAL
·
2019
·Vol. 52
·期 1
·145-152
·
IF 2.639
Bai Hongyuan,Han Li,Ma Hongwei,Yang Lincan,Li Chao,Liu Pibo,Shen Heyu,Lei Lan,Zhang Songbo
A sulfur-containing styrene derivative, 4-methylenethiochromane (META), was subjected to anionic copolymerization with isoprene (Ip) modified with different additives. The reactivity of META can be effectively regulated with additives; thus, gradient and alternating copolymers were prepared in a facile manner. When THF and TMEDA were utilized in the copolymerization, the reactivity was better than that observed without additives, and thus, gradient copolymers with different gradient extents can be synthesized. In addition, metal alkoxides (such as sodium 2,3-dimethylpentan-3-olate (NaODP) and potassium tert -butoxide ( t -BuOK)) were better able to regulate the reactivity, and the copolymers exhibited alternating and nearly alternating sequences. Therefore, the regulation of the alternating or gradient copolymerization of META and Ip was facilely realized through the use of additives.
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）