LUMINESCENCE
·
2013
·Vol. 29
·期 3
·243-247
·
IF 1.273
F Meng,P Liu,F Huang,L Wang,X Wu,L Shen
In this study, a synchronous fluorescence detection method for ferulic acid (FA) is proposed based on a redox reaction between FA and Ce(IV) sulfate in dilute sulfuric acid medium at room temperature. It was found that FA could reduce Ce(IV) to Ce(III) in acidic medium, and sodium tripolyphosphate could further enhance the intrinsic fluorescence of the Ce(III) produced. The enhanced extent of synchronous fluorescence intensity was in proportion to the concentration of FA over the range 3.0 × 10 -8 to 1.0 × 10 -5 mol/L. The corresponding limit of determination ( S/N = 3 ) was 1.3 × 10 -8 mol/L. The proposed method was applied to the determination of sodium ferulate for injection sample with satisfactory results. Copyright © 2013 John Wiley & Sons, Ltd.
研究领域:
分析化学
·
药物分析
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiaojie He,Qingwang Cai,Ziyi Kang,Jingxin Zhang,Huan Tang,Tinglin Huang
Research on inorganic metal coagulants has largely focused on the Al, Fe, Ti and Zr-based salts, leaving insufficient studies on the metal Ce. This study first attempted to conduct an in-depth investigation into the coagulation effect of Ce-based reagents with different valence states. The CCl was a pure Ce(III)-based salt, while Ce(IV)/Ce(III) in CAN equaled 2.7/1. The results demonstrated that CAN possessed far superior capability of turbidity removal compared with CCl, which was on par with polyaluminum chloride (PAC). And its ability to remove organic matter even surpassed that of PAC. Furthermore, CAN exhibited more remarkable and stable performance across a broad pH range. Mechanism studies confirmed that the Ce(III) had the strongest organic ligand complexing ability but insufficient hydrolysis ability, leading the complex re-stabilized in solution. Whereas, the merits of Ce(IV) was based on the following distinctive properties: (1) the high positive charge, with zeta potential even close to that of PAC under acidic condition, (2) the readily formed hydrolysis products owning film-like structure to enhance sweep flocculation, (3) the high coordination number to offer abundant reaction sites to balance the three effects, electric neutralization, complexation, and sweeping, to fully exploit their respective advantages. Thus, the above three effects were combined to achieve the stable coagulation efficiency in CAN containing both Ce(IV) and Ce(III), which might be insufficient or competitive in PAC or CCl. The clarification of the coagulation mechanisms is conducive to better developing Ce-based coagulants and may offer valuable insights into finding more suitable metal-based reagents.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2021
·Vol. 32
·期 3
·883-894
·
IF 3.543
Li Tian,Huang Peng,Li Xuemei,Wang Rongmin,Lu Zhanxiao,Song Pengfei,He Yufeng
The antimicrobial materials are rapidly emerging as a primary component in mitigation of bacterial pathogens, and functional polymers play a vital role for preparation of antibacterial materials because of their good durability and low toxicity. In this study, a novel antimicrobial materials with double antibacterial centers were synthesized by polymer nanospheres (PNPs) being conjugated with Salphen Ce (IV) complexes (HSpCe). Firstly, a typical antibacterial monomer, [3-(methacryloylamino)propyl]trimethyl ammonium chloride (MPAC), was copolymerized with acrylate monomers including methyl methacrylate (MMA) and butyl acrylate (BA) in EtOH/H 2 O, which afforded the copolymer (PMMB) containing quaternary ammonium salt (QAs). Secondly, a typical antibacterial complex, the Salphen ceric (IV) complex (HSpCe) was mixed with PMMB and styrene (St), and St was further in-situ polymerized, which afforded polymer nanospheres conjugated Salphen Ce complexes (HSpCe@PNPs). Its structure and composition were characterized by UV–Vis, IR, SEM and XPS, while the emulsifying properties were measured. Then, its antibacterial performance was evaluated against E. coli and S. aureus . It was found that HSpCe@PNPs presented an excellent antibacterial activity, which is much higher than that of QAs and HSpCe alone. And the antibacterial activities were more than 99% at the minimum inhibitory concentration (700 μg mL −1 ), which is mainly the result of the conjugation of QAs and HSpCe. In summary, a novel antibacterial polymer material with double antibacterial centers was successfully synthesized, which greatly improved the antibacterial activity of the material, and was expected to be applied in the field of antibacterial coatings and medicine. Graphical Abstract Polymer nanospheres conjugated Salphen Ce complexes (HSpCe@PNPs) were synthesized by one-pot two-steps method, and the obtained HSpCe@PNPs would create new opportunities in a wide variety of applications.
研究领域:
材料科学
·
微生物学
·
生物医学工程
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2016
·Vol. 27
·期 1
·249-256
·
IF 1.308
Du Sen,Wang Luyan,Xue Ni,Wu Ting,Pei Meishan,Sui Weiping,Guo Wenjuan
Modified bentonite was prepared by grafting poly(2-(acryloyloxy)ethyl)trimethyl ammonium chloride by a Ce(IV)-redox process to remove an anionic dye, brilliant yellow (BY). The BY removal efficiency changed with pH, temperature and reaction time. The adsorption capacity for BY decreased slightly with value of pH enhanced from 2.0 to 10.0 in solution. Kinetics models and isotherms models were used to match the adsorption behavior. Adsorption kinetics showed the adsorption was a fast course, achieving balance within 180 min and could be described well by the pseudo-second-order model. The thermodynamic equilibrium data showed that the adsorption isotherm matched with Langmuir model. Results represented that the adsorption capacity increased greatly by grafting PDAC on bentonite and the maximum adsorption capacity could reach to 302.9 mg/g.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2024
·
IF 10.9
Haosen Ma,Yanjie Tang,Wei Chen,Qiu Li
The immobilisation mechanism of Pu(IV) by Portland cement-based material is not well understood. This study aims to reveal the immobilisation mechanism and occurrence status of Ce(IV) (chemical analogue of Pu(IV)) in Portland cement paste. The addition of Ce(NO 3 ) 4 first slightly retarded then accelerated the early-age hydration of Portland cement , thereby resulting in an increase of compressive strength by 29 %. The main contributor to immobilisation of Ce is Portland cement rather than zeolite . The hydration products were not altered by Ce(NO 3 ) 4 addition, whereas the hydration degree and mean chain length of C-(Al/Ce)-S-H increased. Over 99.99 % of Ce was immobilised by synthesised C-S-H. A analysis of the synthesised C-S-H confirmed the formation of C-Ce-S-H, where Ce tetrahedra took the bridging site of silicate chain of C-Ce-S-H. Nano-crystalline CeO 2 grains were identified, which intermixed with C-Ce-S-H. Approximately 90 % of Ce were immobilised by C-Ce-S-H, and the rest exist as nano-crystalline CeO 2 grains.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 331
·期 1
·365-373
·
IF 1.371
Li Chunhui,He Hui,He Mingjian,Gao Yang,Zhang Meng,Jiao Caishan
A detailed extraction equilibrium study is experimentally performed to understand the extraction mechanisms of Ce(IV) by 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (C 4 mimNTf 2 ) in 1,2-dichloroethane. Further, the influence of adding TBP on the distribution ratio is investigated and demonstrated. The ceric aqueous chemistry in the nitric acid solution and slope analysis are combined to reveal the extraction mechanism. The monovalent anionic complex HCe(NO 3 ) 6 − is the dominant species, which extracted by C 4 mimNTf 2 . Importantly, this study demonstrates the antagonistic effect between TBP and C 4 mimNTf 2 on the extraction process.
研究领域:
化学
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材料科学
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环境科学
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DOI
高影响因子
NUCLEAR TECHNOLOGY
·
2023
·
IF 1.5
Guanghui Wang,Hui He,Yaorui Li,Meng Zhang,Yang Gao,Caishan Jiao
The contaminated solvent from the Purex process is washed with alkaline detergents such as sodium carbonate, which generates a large amount of secondary wastes. Therefore, hydrazine carbonate as a salt-free reagent deserves to be studied in depth. In this study, the Ce(IV), U(VI), and Zr(IV) metal ions in organic phases containing dibutyl phosphate (HDBP) of 30% tributyl phosphate (TBP)–dodecane were washed with hydrazine carbonate. The effects of the oscillation time (1 to 15 min); temperature (25°C to 85°C); cumulative number of washes (one to four times); mass fraction of hydrazine carbonate (0.1% to 20%); volume ratio of the aqueous phase to the organic phase (0.2 to 5); HDBP concentration (0 to 0.4 M); HNO3 concentration (0.05 to 8 M); and concentration of Ce(IV), U(VI), and Zr(IV) metal ions on the removal percentages of Ce(IV), U(VI), and Zr(IV) metal ions in polluted solvents were studied. The results showed that when the organic phase containing 0.02 M HDBP was washed three times with 5% hydrazine carbonate at 25°C, the removal percentages of the Ce(IV), U(VI), and Zr(IV) ions were 96%, 98%, and 94%, respectively. Meanwhile, the retention concentrations of the three in the organic phase were 35, 28, and 78 mg/L, respectively. The increase of the mass fraction of hydrazine carbonate enhances the removal of the metal ions from the organic phase into the aqueous phase. High acid is not conducive to alkaline washing of metal ions. The increase of HDBP concentration not only promotes extraction but also increases the retention capacity of the organic phase and has the most significant effect on Zr(IV). U(VI) promotes the preferential washing of Zr(IV) while Ce(IV) increases the metal retention concentration of Zr(IV) in the organic phase.
研究领域:
化学工程
·
核化学与化工
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DOI
高影响因子
HYDROMETALLURGY
·
2016
·
IF 2.29
Shengting Kuang,Zhifeng Zhang,Yanling Li,Guolong Wu,Haiqin Wei,Wuping Liao
A novel extractant, di (2-ethylhexyl) (2-((2-ethylhexyl) amino) propan-2-yl) phosphonate (DEHAPP, abbreviated as B ), was synthesized for the selective extraction of Ce(IV) in sulfate medium. The effect of contact time, the H 2 SO 4 concentration, the DEHAPP concentration and temperature on the Ce(IV) extraction were studied systematically. DEHAPP exhibits a good extraction ability towards Ce(IV) when compared with other neutral organophosphorus extractants such as Cyanex 923, Cyanex 925 and DEHEHP. The extraction equilibrium constants and thermodynamic parameters (Δ G , Δ H and Δ S ) were calculated. The extraction reaction of Ce(IV) is an endothermic process. The extracted complexes were determined to be H 2 SO 4 · B ( org ) and Ce(HSO 4 ) 2 SO 4 ·2 B ( org ) . A extraction process to selectively recover Ce(IV) from bastnaesite leaching was proposed, by which the purity of cerium product reached 99.5% with a yield of 90.7%.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Jiajun Liu,Xionghao Zhang,Junda Li,Yi Feng,Li Feng,Shuai Han,Tingyu Pan,Taiheng Zhang,Shenyu Wu,Zijie Ke,Bingzhi Liu,Huaili Zheng
In this study, an advanced oxidation process with E/Ce(IV) synergistic PMS (E/Ce(IV)/PMS) was established for the efficient removal of Reactive Blue 19 (RB19). The catalytic oxidation performance of different coupling systems was examined and the synergistic effect of E/Ce(IV) with PMS in the system was substantiated. The oxidative removal of RB19 in E/Ce(IV)/PMS was excellent, achieving a removal efficiency of 94.47% and a reasonable power consumption (EE/O value was 3.27 kWh·m −3 ). The effect of pH, current density, Ce(IV) concentration, PMS concentration, initial RB19 concentration and water matrix on the removal efficiency of RB19 were explored. Additionally, quenching and EPR experiments showed that the solution contains different radicals such as SO 4 ·− , HO∙ and 1 O 2 , where 1 O 2 and SO 4 ·− played key roles, but HO∙ just acted a weaker role. Ce ion trapping experiment confirmed that Ce(IV) was involved in the reaction process and played a major role (29.91%). RB19 was subject to three possible degradation pathways, and the intermediate products displayed well biochemical properties. To conclude, the degradation mechanism of RB19 was explored and discussed. In the presence of current, E/Ce(IV)/PMS performed a rapid Ce(IV)/Ce(III) cycle, continuously generating strong catalytic oxidation Ce(IV), The reactive radicals derived from the decomposition of PMS, in conjunction with Ce(IV) and direct electro-oxidation, efficiently destroyed the molecular structure of RB19 and showed an efficient removal rate.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lian Yang,Haoran Qiu,Guoliang Liu,Jiang Chang,Shaoxia Yang,Feng Xiao
In this study, a series of novel thermo-responsive materials were synthesized using polyvinylidene fluoride, N-isopropylacrylamide (NIPAM) and graphene oxide (GO) via Ce (IV)-induced redox radical polymerization name as PNG. Thermo-responsive membranes were prepared by non-solvent induced phase separation. The results demonstrated that the C O and N-H stretching absorption intensities increased with the addition of NIPAM. XPS analysis demonstrated that the PNG1 membrane exhibited abundant functional group structure under the dosage of NIPAM at 1 g. The finger-like porous structure of membrane became longer and wider with the addition of NIPAM at 1 g, leading to a maximum porosity of 45.5 %. The CA decreased from 62.4 ° to 49.0 ° at 35 °C under the adding dosage of NIPAM at 1 g. The temperature-sensitive of PNG1 membrane was 35 °C. In addition, The PNG1 membrane had the lower R ir and higher flux recover than the others under the BSA rejection. According to the XDLVO theory analysis, the total interaction energy for PNG1 membrane achieved the maximum absolute values of −33.850 mJ/m 2 and −19.956 mJ/m 2 than the others under the temperature at 25 °C and 35 °C. This interaction influenced the adsorption between the pollutant and membrane surface, resulting in reversible fouling.
研究领域:
材料科学
·
环境工程
·
高分子化学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 12
·1-10
·
IF 5.705
Wang Meng-Meng,Chen Shuai,Zhang Dan-Dan,Yu Yong-Liang,Wang Jian-Hua
A sorbent for selective extraction of phosphoproteins was obtained by immobilization of a Ce(IV)-substituted polyoxometalate on ethylenediamine-functionalized graphene oxide (CeEGO). The resulting composites exhibit an adsorption capacity of 981 mg g −1 for β-casein due to the synergistic effect of metal-affinity interaction between Ce(IV) and phosphate groups and π-stacking interaction between the polyoxometalate framework and the phosphate groups. The results of LC-MS and SDS-PAGE analysis show that the CeEGO composites can be applied to the extraction of phosphoproteins from protein mixture, and as little as 50 μg mL −1 of the phosphoprotein β-casein can be detected by SDS-PAGE. It was also applied to the extraction of β-casein from spiked biological samples such as drinking milk, whole blood and swine heart tissue extract.
An efficient sorbent is obtained by immobilization of a Ce(IV)-substituted polyoxometalate on ethylenediamine-functionalized graphene oxide (CeEGO). The resulting composites exhibit highly selective capture capacity towards phosphoproteins due to the synergistic effect of metal-affinity interaction between Ce(IV) and phosphate groups and π-stacking interaction between the polyoxometalate framework and the phosphate groups.
研究领域:
分析化学
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生物化学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Shuai Liu,Hao Qu,Yu Mao,Lili Yao,Baolei Dong,Lei Zheng
Propyl gallate (PG) is a commonly used synthetic phenolic antioxidant in foodstuffs and industrial products. Due to the potential health risk of PG, rapid and on-site detection in food and environment samples are important to guarantee human health. Herein, we demonstrated rapid monitoring of PG by a fluorescence turn-on strategy based on a specific fluorogenic reaction between PG and polyethyleneimine (PEI). Specifically, Ce 4+ with oxidase-mimicking activity oxidized PG to its oxides, which then reacted with PEI through the Michael addition to generate the fluorescent compound. The proposed fluorogenic reaction had good specificity for PG, which could distinguish PG from other phenolic antioxidants and interferences. Furthermore, portable and low-cost organogel test kits were prepared using poly(ethylene glycol) diacrylate for quantitative and on-site detection of PG via a smartphone-based sensing platform. The organogel-based assay detection limit was 1.0 μg mL –1 with recoveries ranging from 80.2% to 106.2% in edible oils and surface water. Suitability of the developed assay was also validated by high-performance liquid chromatography . Our study provides an effective fluorescent approach to rapid, specific, and convenient monitoring of PG, which is useful for diminishing the risk of PG exposure.
研究领域:
分析化学
·
环境科学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）