JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
·
IF 1.6
Song Luna,Jia Yanheng,Lyu Ruidong,Yang Jinyuan,Ma Xiaohui,Zhang Kaiqiang,Miao Jianxiong,Miao Zhipeng,Yu Jingwen
Novel indole-based organic polymers (In-Mel-HCP and 2PhIn-POP) were synthesized for iodine capture from both organic and gaseous phases. Herein, the coupling of indole resin and melamine resin was successfully realized. Besides, the feasibility of constructing tertiary carbon center by ethanol and chloroform was demonstrated once again. In organic phase, the iodine adsorption property is promoted by both the large specific surface area and the high active adsorption site. In gaseous phase, the large average pore size facilitates the adsorption. Chemisorption mainly occurs in the original adsorption experiments for both phases, while physisorption is more significant during the cycling tests.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2016
·
IF 5.886
Yuanyuan Huang,Weidong Liu,Hui Feng,Yangting Ye,Cong Tang,Hang Ao,Meizhi Zhao,Guilin Chen,Jianrong Chen,Zhaosheng Qian
Brightly luminescent copper nanoclusters (CuNCs) were prepared via a facile one-step synthesis in organic phase, and a novel luminescent nanoswitch on the basis of CuNCs through alternation of the physical states between aggregation and dispersion in response to specific external stimuli was designed. Two states including aggregation state and disaggregation state corresponding to fluorescence on and off signaling can be readily switched in a reversible way based on the aggregation-induced emission and disaggregation-induced quenching mechanism, respectively. This reversible nanoswitch can be controlled by the external stimulus water or N,N′-dicyclohexylcarbodiimide (DCC). The bright luminescence due to aggregation of CuNCs in organic solvents can be effectively quenched by the introduction of a small amount of water, where a disaggregation-induced quenching takes place. This specific behavior is capable to quantify an ultralow level (ppm) of water in aprotic solvents. The excellent reversibility of the nanoswitch enables one to monitor water content in a continuous and recyclable way.
研究领域:
分析化学
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纳米科技
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Lelin Zeng,Qian Liu,Bart Van der Bruggen,Kewen Tang,Xiang Yi,Guoxiang Wang
An integrated separation process is proposed for recovery and enantioseparation of a chiral antihypertensive drug amlodipine from wastewater. Utilizing this integrated technology, both high recovery ( Y ) and high enantiomeric excess ( ee ) were obtained due to the strong enrichment ability of supported liquid membrane with strip dispersion (SLM-SD) and the good enantioseparation ability of organic phase crystallization. These two steps were coupled by an intermediate step: aqueous phase crystallization. In the SLM-SD, an extractant P204 (bi(2-ethylhexyl)phosphoric acid) was dissolved in n -heptane to form a liquid membrane phase, and hydrochloric acid was used as stripping agent. One-stage SLM-SD recycled the amlodipine from wastewater into a stripping phase with a removal ( E AD ) of 99.67% and a Y 1,AD of 87.91% after optimizing the parameters: pH and the concentrations of P204, hydrochloric acid, and amlodipine. Sodium hydroxide and ( L )-tartaric acid were added into the stripping aqueous phase to obtain amlodipine-1/2( L )-tartrate acid crystals, which were directly used in the subsequent organic phase crystallization without tedious additional steps. The Y 2, AD of aqueous phase crystal reached 99% at a pH of over 6.68 and a molar ratio of over 0.5 for ( L )-tartrate acid to amlodipine. Using ( L )-tartaric acid or ( D )-tartaric acid as resolving agent and dimethylsulfoxide as solvent, high-value-added products ( R )-amlodipine and ( S )-amlodipine were obtained by two steps of organic phase crystallization. The ee of products was over 99% after optimizing the dosages of dimethylsulfoxide and resolving agent. To increase the total yield, the generated mother liquors were re-treated by SLM-SD with the recovery of over 99% for residual amlodipine.
研究领域:
环境科学
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制药工程
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化学工程
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产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 14
·5361-5370
·
IF 6.482
Honghong Gong,Yipin Cheng,Ying Zhang,Jie Xiong,Zhicheng Zhang
The detection of copper ions is rather important since they have undesired hazardous effects on the ecosystem and human health. Many methods have been developed for copper ion detection in the aqueous phase among which the direct detection of copper ions in the organic phase has been rarely reported. To overcome the disadvantage of the complicated sample pre-treatment involving the detection of copper ions in the organic phase, herein, we report a type of poly(vinylidene fluoride) based fluoropolymer (P(VDF–ATrFE)) as a novel fluorescence sensor for copper ion detection. A poly(vinylidene fluoride) based fluoropolymer (P(VDF–ATrFE)) can selectively bind to Cu2+ in the presence of an organic ligand, which is utilized to directly demonstrate the sensitive detection of Cu2+ in the organic phase. A rapid time response, excellent selectivity and highly efficient quantitative analysis of Cu2+ in the organic phase are obtained using P(VDF–ATrFE) as a fluorescent probe. This work provides a fast and convenient visual fluorescence detection method of Cu2+ in the organic phase.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2022
·
IF 8.634
Laiquan Lv,Jiankang Wang,Mengting Ji,Yize Zhang,Shengyao Huang,Kefa Cen,Hao Zhou
In this article, waste phoenix leaf biochar was introduced into three most used organic phase change materials (PCMs) to prepare shape-stable composite PCMs by the vacuum impregnation method. The encapsulation capacity and encapsulation efficiency of steam activated biochar for paraffin, stearic acid, and polyethylene glycol were 59.28% and 49.14%, 63.03% and 57.62%, 71.38% and 46.84%, respectively, which was related to the mechanisms of biochar encapsulated organic PCMs. The dominant mechanisms of biochar encapsulated organic PCMs are summarized as pore-filling, hydrogen-bonding, hydrophobic interaction between biochar and PCMs, and other potential mechanisms. Influence degree η was introduced to illustrate the effect of biochar on organic PCMs, 16.56%, 8.72%, and 35.75% for steam activated biochar on paraffin, stearic acid, and polyethylene glycol. In addition, compared with original PCMs, the thermal conductivity of biochar-based composite PCMs first decreased and then increased with the increase of biochar pyrolysis temperature. Moreover, biochar-based composite PCMs had better thermal stability, concerned with the dominant mechanisms of biochar encapsulated organic PCMs. Therefore, biochar-based composite PCMs proposed in this study expand the application of biochar and organic PCMs in thermal energy storage , building energy conservation , solar energy utilization, and battery thermal management system .
研究领域:
能源材料
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Tengfang Zhang,Peijian Wang,Yuhao Chen,Q. Jason Niu,Haixiang Sun
Incorporating hydrophilic nanoparticles into organic phase during interfacial polymerization (IP) to establish covalent bonds with organic phase monomers has proven to be a successful approach for fabricating high-performance thin-film nanocomposite (TFN) reverse osmosis (RO) membranes. However, the effect of covalent bonds number on the membrane structure and properties remains uncertain. Herein, hydrochloric acid doped polyaniline (PANI-HCl) with a small amount of amine groups and inherent polyaniline (PANI-base) nanomaterials with a larger amount of amine groups were prepared as organic phase additives for preparing high-performance TFN RO membranes. The amine groups on the nanoparticles can bond covalently with the acyl chloride groups of trimethyl chloride (TMC), leading to the accumulation of TMCs at organic/aqueous interface and accelerates IP reaction rate, resulting in a thinner, denser polyamide layer with more leaf-like structures and free volume. The water permeance of the PANI-base-RO membrane was improved by 62.5 % from 0.8 to 1.3 Lm −2 h −1 bar −1 , and the NaCl rejection was improved from 97.6 % to 99.4 % compared with the pristine membrane. Overall, this work highlights the beneficial impact of organic phase additives with more amine groups on enhancing the desalination performance of RO membranes, providing valuable insights for the structural design of additives and dispersing medium selection.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Experimental Nanoscience
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2012
·
IF 1.011
Zhongping Chen
The precursors used to prepare high-quality nanoparticles by high-temperature decomposition are expensive and toxic organometallic compounds. Fe(OH)3, an inexpensive and environmentally friendly iron-containing compound, is for the first time introduced to act as an precursor to generate monodisperse iron oxide nanoparticles. The obtained nanoparticles are characterised by transmission electronic microscopy, IR, XRD and vibrating sample magnetometer. Organic-soluble ferromagnetic rod-like and superparamagnetic dot-like nanoparticles with the size ranging from 12 to 25 nm are obtained in a nonpolar solvent by adjusting reaction parameters, such as surfactant concentration and reaction time. Water-soluble nanoparticles can be synthesised when a bipolar solvent is used instead of nonpolar solvent. The results show that Fe(OH)3 is a promising precursor for the high-temperature decomposition method.
研究领域:
材料科学
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纳米技术
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无机化学
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环境科学
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生物医学工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2019
·
IF 1.911
Xiaoyan Zheng,Dong Feng,Liangrong Yang,Junfeng Hui,Jiemiao Yu,Qiyu Meng,Huizhou Liu,Daidi Fan
Mild stir-assisted membrane dispersion extraction (MDE) method was employed to enhance propionic acid (HA) extraction and compared to the mechanical stirred extraction (MSE) method. Triocylamine (TOA) and tributyl phosphate (TBP) were chosen as model extractant to extract HA. Firstly, droplet size and the size distribution of organic phase were analyzed, and then the effects of phase ratio, extractant and HA concentration on extraction performance were investigated. Comparing the two extraction methods, the results show mild stir-assisted MDE method reduced the mass transfer equilibrium time compared to MSE method. The mass transfer mechanism was explored by analyzing mass transfer resistance. Mild stir-assisted MDE had less total mass transfer resistance than MSE. When the extractant concentration was 40%, the extraction process was controlled by organic phase mass transfer process with HA volume fraction was 1% and controlled by both of reaction process and organic phase mass transfer process when HA concentration increased to 5%. This work may provide a new type of extraction method for the recovery of organic carboxylic acid .
研究领域:
生物工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Zhuyuan Wang,Songmiao Liang,Yan Jin,Lianrui Zhao,Lijie Hu
Optimizing thickness and structure of polyamide (PA) selective layer of thin film composite (TFC) membranes is critical to improve the performance of the membranes. Here, we employed controlled interfacial polymerization to fabricate free-standing PA nanofilms on a thermal-reversible agarose hydrogel. Manipulation of the nanofilms structure was approached by tailoring the amine diffusivity in organic phase composed of benzene and n-hexane mixtures. An UV–vis method was firstly developed to in-situ monitor the diffusion process of amines from aqueous phase to organic phase. The structure and properties of the nanofilms were systematically analyzed by SEM, AFM and ATR-IR. Experimental results revealed that the diffusion kinetics of amines in organic phase is strongly depends on the content of benzene in the mixture solvent and therefore give rise to different thickness and structure of the nanofilms. The amines diffusion rate was accelerated at higher benzene content, causing a rougher surface, thicker thickness and smaller Young's modulus of the resultant nanofilms. Remarkably, with good fitting coefficient of R 2 = 0.9936, the thickness of the nanofilms exhibits a linear relationship with their surface roughness .
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
HYDROMETALLURGY
·
2019
·
IF 3.465
Pan Sun,Kun Huang,Huizhou Liu
Separation of adjacent rare-earth elements, such as Pr and Nd, is extremely difficult due to the similarity in their physicochemical properties . Enhanced separation of adjacent rare-earth elements based on the “push-pull effect” by addition of water-soluble complexing agents was an effective strategy in traditional organic-aqueous two-phase extraction. However, environmental pollution is serious due to the residual of complexing agent in the extraction raffinates. In present work, a novel “external push-pull” extraction system, composed of three coexisting liquid phases, P507 organic phase, ionic liquid (tributyl-methyl ammonium nitrate , N 4441 NO 3 )-rich phase and NaNO 3 aqueous solutions, is suggested to improve the separation between Pr and Nd. It is revealed that Nd and Pr can be enriched respectively into the P507 organic top phase and N 4441 NO 3 -rich ionic liquid middle phase in the external push-pull extraction system, owing to a so-called “external push-pull effect” from a reversed extraction selectivity of P507 organic phase and N 4441 NO 3 ionic liquid-rich phase towards Nd and Pr, respectively. Compared to traditional organic-water two-phase systems, the separation factor of Pr to Nd in the suggested external push-pull extraction system could increase obviously to 3.5 or even more. Various effects from the aqueous pH, NaNO 3 concentration, the initial concentration ratios of Pr to Nd in feed aqueous solutions, and the addition amount of N 4441 NO 3 , the volume of P507 organic phase on the separation between Pr and Nd are discussed. In addition, reversal extraction of rare earth ions in the ionic liquid-rich phase is found to be closely related to the complexation behavior of rare earth ions with NO 3 − ions by using molecular dynamic simulations. Based on this work, a possibility for extraction and separation of 14 rare-earth element ions from their coexisting aqueous solutions using the suggested external push-pull extraction system is also explored. The present work highlights a novel green strategy for improving the separation of adjacent rare-earth elements.
研究领域:
化学工程
·
稀土分离技术
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2022
·
IF 5.479
Licheng Zhang,Lianmin Ji,Zhonghua Niu,Lijuan Li
Currently, with the increasingly stringent requirements of carbon emissions and the rapid development of the new energy industry, the strategic position of lithium has been elevated unprecedentedly. Improving the lithium yield in the ore lithium extraction process is very important for the sustainable development of the lithium production industry. In this study, the by-product mirabilite from the lithium hydroxide production was treated as the material to deeply recover lithium. The effect factor of equilibrium extraction, the separation mechanism, and the removal of residual organic matter was discussed. The results showed that the optimized organic phase composed of 0.5 M 1-benzoyl-2-nonanone(HBNA) and 0.5 M trialkyl phosphine oxide(TRPO) could effectively extract lithium from mirabilite dissolved solution, and 99% of lithium could be recovered through 3-stage countercurrent extraction under the condition of O/A = 1/1, mixing time = 5 min, and temperature = 20 °C. The 95% of co-extracted sodium in the loaded organic could be easily eluted by 0.5 M HCl at an O/A = 10/1, and afterward, the lithium in the organic phase could be concentrated to 25 g/L through stripping by HCl or H 2 SO 4 . The dissolved organic matter in the extraction raffinate was deeply removed by the resin adsorption method under the condition of pH = 2.0, adsorption time = 4 h, and solid to liquid ratio = 1/5. The DFT study demonstrated that the complexes have the lowest energy and the most stable structure when the stoichiometric ratio of Li, HBNA, and TRPO is 1:1:1 and a dimer is formed. This process provided a novel approach to improving the lithium recovery of lithium hydroxide production.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 4
·657
·
IF 4.034
Fuxian Wang,Shiyuan Gao,Jiachuan Pan,Xiaomei Li,Jian Liu
Organic phase change materials (PCMs) have great potential in thermal protection applications but they suffer from high volumetric change and easy leakage, which require “leak-proof” packaging materials with low thermal conductivity. Herein, we successfully modify SiO2through a simple 2-step method consisting of n-hexane activation followed by short-chain alkane silanization. The modified SiO2(M-SiO2) exhibits superior hydrophobic property while maintaining the intrinsic high porosity of SiO2. The surface modification significantly improves the absorption rate of RT60 in SiO2by 38%. The M-SiO2/RT60 composite shows high latent heat of 180 J·g−1, low thermal conductivity of 0.178 W·m−1·K−1, and great heat capacity behavior in a high-power thermal circuit with low penetrated heating flow. Our results provide a simple approach for preparing hydrophobic SiO2with high absorption of organic PCM for thermal protection applications.Keywords:thermal protection;organic PCM;SiO2aerogel;short-chain modification;PCM absorption
研究领域:
材料科学
·
热能工程
✓ 已验证
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）