ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Meng Lu,Yao Wang,Junxia Yu,Dezeng Li,Qingbiao Zhao,Ruan Chi
Phosphogypsum (PG) is a solid waste generated during the wet process of phosphoric acid production. The environmental-friendly disposal and recycling of PG is vital in the field of environmental solid waste treatment . In this study, PG is used for adsorbent of dyes in wastewater to achieve the goal of recycling waste with waste. Surfactant-modified phosphogypsum (ODBAC@PG) was prepared using octadecyl dimethyl benzyl ammonium chloride (ODBAC) as modifier. ODBAC@PG exhibits high adsorption capability for anionic dyes (methyl blue (MeB) and indocyanine carmine (IC)). The pseudo-second-order kinetic model fits the kinetic experimental data for the adsorption of two organic anionic dyes. Langmuir adsorption isotherm fits the adsorption characteristics of MeB and IC on ODBAC@PG, exhibiting a monolayer adsorption pattern. Thermodynamic parameters indicate the spontaneous and exothermic properties of MeB and IC on ODBAC@PG. MeB and IC have antagonistic effects on each other in binary adsorption system. High adsorption capacity after six cycles of experiments demonstrates the high reusability of ODBAC@PG. The nature for the adsorption includes electrostatic interaction, hydrogen bond and hydrophobic interaction. Using ODBAC@PG for dyes wastewater treatment can accomplish the goal of treating waste with waste and turning waste into treasure.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2013
·
IF 4.387
Haiyu Tian,Junhong Qian,Qian Sun,Hongyan Bai,Weibing Zhang
Three fluorescent probes were constructed by incorporating an α,β-unsaturated ketone to a coumarin fluorophore. The selective addition of sulfite to the alkene of TSP assisted by cetyltrimethyl ammonium bromide (CTAB) micelle can be visualized by dramatic color and ratiometric fluorescence changes. In CTAB–PBS system, the fluorescence intensity ratio at 465 nm and 592 nm ( I 465 / I 592 ) and the absorbance ratio at 390 nm and 470 nm ( A 390 / A 470 ) were linearly proportional to sulfite concentration in the range of 0.5–150 μM, and the detection limit was 0.2 μM. Good selectivity and competition of TSP1 towards sulfite over several anions and biological thiols were acquired. Probe TSP1 was used to detect sulfite in three realistic samples (mineral water, sugar and white wine) with good recovery.
研究领域:
分析化学
·
环境科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2017
·Vol. 20
·期 6
·1281-1290
·
IF 1.45
Zhang Qian,Li Sha,Zhang Fanglei,Wei Xilian,Liu Min,Liu Jie,Sun Dezhi
The self-assembly behaviors of mixtures of sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and didodecyl dimethylammonium bromide (DDAB) in polyethylene glycol 200 (PEG 200) and in water were investigated by surface tension, conductivity, steady-state fluorescence and dynamic light scattering (DLS) methods. The results show that the oppositely charged binary surfactant system can form micelles in PEG 200; the critical micellization concentration (CMC) decreases for the binary system versus those of either surfactant alone. Although there is no charge screening in the PEG 200 system, the CMC values significantly increase and the system does not precipitate or show turbidity at any proportion of AOT to DDAB, while a multiphase composition gap exists in water due to the strong electrostatic attraction. It is speculated that the weak polarity of PEG 200, the decreased solvophobic interaction between the alkyl chain and PEG 200, and the loose structure of the resulting micelles might explain the experimental phenomena. Observed from the values of the interaction parameter, it is found that there are a strong attractive interaction and a synergistic effect between AOT and DDAB in aqueous solution, in comparison, the synergy between them in PEG 200 is very weak.
研究领域:
胶体与界面化学
·
软物质物理
·
溶液化学
✓ 已验证
DOI
高影响因子
ChemNanoMat
·
2025
·
IF 2.6
Kui Cao,Xun Yang,Fanen Zeng,Zhen Tan,Qi Lv,Yaning Zhang,Qinyi Yang,Bing Xu
Carbon nanospheres (CNSs) are synthesized through the direct hydrothermal method by using the polyelectrolyte polydiallyldimethylammonium chloride (PDDA) as a cationic surfactant and high concentration glucose as a carbon source. The produced samples are systematically characterized by scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy, zeta potential analysis, X-ray diffraction, and Brunner–Emmet–Teller measurements. The obtained CNSs are well dispersed with particle size ranging from 70 to 100 nm. Their specific surface area increases remarkably to 1597 m 2 g −1 after activated by potassium hydroxide, together with the formation of hierarchical micropores and mesoporous structures (an average pore size of ≈3 nm). The possible reaction mechanism of the CNSs is deduced on the basis of the above characterizations, and the size of the CNSs can be regulated by the PDDA with different molecular weight. The CNSs material exhibits a specific capacitance of 121.1 F g −1 when used as a supercapacitor electrode at a current density of 0.5 A g −1 . Remarkably, the CNSs electrode shows excellent rate capability and outstanding cycling stability with almost no degradation over 7,000 cycles. These data reflect their excellent electrochemical performance for supercapacitor.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yu Lin,Kai Wu,Xin Zhou,Yunsheng Xia
For nanocrystals (NCs) self-assembly, understanding the chemical and supramolecular interactions among building blocks is significant for both fundamental scientific interests and rational nanosuperstructure construction. However, it has remained an extreme challenge for many self-assembly systems due to the lack of appropriately quantitative approaches for the corresponding exploration. Herein, by combination of the proposed colorimetric method for cationic surfactant quantitation and all-atom simulations, we manage to present a clear chemical picture for the thiol molecules modulated self-assembly of gold nanorods (GNRs), one of the earliest and most convenient methods for the fabrication of freestanding GNR self-assemblies. It is revealed that the self-assembly of GNRs is driven by the hydrophobic effects of the alkyl chains of the modified cationic surfactants, as their bilayer structure is destroyed by the added thiol molecules. In other words, the actual roles of the thiol molecules for causing GNRs assembly are indirectly inductive effects instead of the previously believed direct electrostatic attraction and/or hydrogen-bond linking effects of the binding thiol molecules. Furthermore, the GNRs exhibit diameter-dependent assembly behaviors: thicker GNRs tend to adopt the end-to-end assembly mode, while thin ones prefer the side-by-side assembly mode, further demonstrating that hydrophobic effects among the build blocks are the driving force for the GNRs assembly.
研究领域:
纳米材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Friction
·
2022
·Vol. 11
·期 4
·513-523
·
IF 4.924
Gao Tianyang,Li Jinjin,Wang Weiqi,Luo Jianbin
An extremely low friction state was observed on the gold surface induced by applying a specific negative potential in cationic surfactant solution. The friction force showed a remarkable reduction from 8.3 to 3.5 × 10 −2 nN (reduced by 99.6%) with increasing the period of negative applied potential, and the final friction coefficient could reduce down to 3 × 10 −4 . The extremely low friction state was robust, and it also exhibited an excellent load bearing capacity, which cannot be damaged by a high load. Moreover, the extremely low friction state achieved under negative applied potential could keep stable even after the removal of potential, but failed in a short time, once a specific positive potential was applied. It was demonstrated that there was a stable electro-adsorption of surfactant molecules on the gold surface induced by applying a negative potential, leading to the formation of a bilayer structure on the gold surface. The hydration layers of the bilayer on the gold surface and micelles on the silica probe provided a shear plane with an extremely low shear strength, leading to the extremely low friction state on the gold surface. This study provides a method to achieve extremely low friction state by applied potential.
研究领域:
材料科学
·
界面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
·
IF 2.74
Wei Lin,Zhengming Yang,Juan Wang,Ting Chen,Xingwang Shi
The pH-induced rheological property of octadecy trimethyl ammonium bromide with anthranilic acid was investigated. The viscoelasticity property and structural transformation of molecular self-assembly were comprehensively discussed by means of rheological measurements, dynamic light scattering and cryogenic-transmission electron microscopy. On the basis of surface tension results, the change of viscoelasticity was explained by calculating the packing parameter of P . UV–vis results confirmed that the pH-dependent interaction between the aromatic ring of anthranilic acid and the head group result in the transition between WLMs and spherical micelles, thus altering the viscoelasticity of WLMs.
研究领域:
胶体化学
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物理化学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2015
·
IF 2.467
Jinming Hua
Four modifiers, amorphous iron (hydr)oxides (Fe x (OH) y ), manganese oxides (Mn x O y ) and cationic surfactants , cetyltrimethylammonium bromide (CTMAB), and poly(dimethyldiallylammonium chloride) (PDMDAAC), were used to synthesize single and complex modified bentonite . Arsenic removal by modified bentonite was investigated through effects of the type, combination and adding level of modifiers. X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and N 2 adsorption-desorption were used to explore the characteristics of the original and modified bentonite. It was found that the type, combination and adding amount of modifiers would have a noticeable influence on the structure and adsorption behavior of resulting bentonite adsorbents. The complex modified bentonite, with manganese oxides and then PDMDAAC at proper addition level, showed the best adsorption properties for arsenic, which could be due to a synergistic effect between PDMDAAC and manganese oxides during modification process. PDMDAAC was found to be favorable for coating of manganese oxides onto bentonite. The adsorbing capacity of modified bentonite depended not only on specific surface area ( SSA ), but mainly on composite components and/or their specific surface properties.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 34
·27197-27204
·
IF 3.84
Guangzhou Cao,Xiangfeng Guo,Lihua Jia,Xuhua Tian
A series of novel cationic surfactants, N-alkylcaramoylmethyl-N-[2-(2-phenoxyacetamido)-ethyl]-N,N-dimethylammonium chloride, were synthesized and their chemical structures were characterized using 1H-NMR, 13C-NMR, ESI-MS and FT-IR. Their aggregation behaviours in aqueous solution were systematically investigated by surface tension and electrical conductivity methods. It was found that the surfactants have higher surface activity compared with a similar structural surfactant. A series of thermodynamic parameters of aggregation indicate that the aggregation is entropy-driven at the investigated temperatures. In addition, they possess excellent bactericidal activities against the selected strains.
研究领域:
化学
·
生物学
·
医学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 32
·
IF 1.866
Ming Lu,Ruyi Xie,Zulan Liu,Zhenyun Zhao,Hong Xu,Zhiping Mao
Recently, great efforts have been made to gain highly conductive fabrics for smart textiles and flexible electromagnetic shielding materials. Different from the conventional chemical synthesis method, fibrillar polypyrrole was synthesized on the cotton fabrics via a simple chemical polymerization process with micelles of cationic surfactant (cetyltrimethylammonium bromide, CTAB) as soft template. The modified cotton fabric exhibited excellent electrical conductivity and electromagnetic interference shielding effectiveness due to the formation of fibrillar polypyrrole on the fiber surface. Electrical conductivity of fabric surface were studied by four-probe resistivity system. The highly conductive fabric with surface conductivity of 5.8 S cm −1 could be obtained by changing cationic surfactant concentration. The electromagnetic interference shielding effectiveness (EMI SE) of the modified fabrics was evaluated by the vector network analyzer instrument. Compared with the sample without using surfactant, the EMI SE value of PPy-coated cotton fabrics increased by 28% after using 0.03 M CTAB as soft template. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43601.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Jing Zhang,Xiaofei Chen,Wen Li,Bao Li,Lixin Wu
Ionic complexes comprising single/double chain cationic surfactant and Lindqvist-type polyoxomolybdate anionic cluster were used for controlled self-assembly in organic solutions. In the solvent with low dielectric constant the complexes self-assembled into flat ribbon like lamellar aggregations with an inverse bilayer substructure where the cluster located at the middle. Under the condition of increased dielectric constant, the solvent triggered the formation of helical self-assemblies, which finally transformed from helical ribbons to the flower-like assemblies due to the bilayer becoming excessively twisted. The self-assembled morphology and the substructure were characterized by SEM, TEM, and XRD. The solvent dielectricity-controlled morphologic transformations modulated by the variation of electrostatic interactions between organic cations and inorganic polyanions were demonstrated by 1H NMR and IR spectra. The strategy in this work represents an effective route in targeting the chirality-directed functionalization of inorganic clusters by combining controllable and helical assemblies of achiral polyoxometalate complexes in one system.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Shuangjia Wang,Yun Shen,Xiuping Chen,Limei Dong,Hong Yu,Mutai Bao,Yiming Li
Based on the synergistic interaction between palygorskite (PAL) and cetyltrimethylammonium bromide (CTAB), Pickering emulsion gel was successfully prepared in this study in a wide range of oil volume fraction (15–75%). All prepared emulsion gels remained stable for more than 6 months at room temperature. The microstructure, stability, and rheological properties of the prepared emulsion gels were characterized and evaluated. The influence of various environmental factors, including temperature, pH, salinity and types of oil phase on the formation of emulsion gels were investigated. A series of characterization methods were used to investigate the formation and stabilization mechanism of Pickering emulsion gel. The reduction of interfacial tension between oil and water, the changed surface characteristics of PAL, and the formation of a three-dimensional network structure in the continuous phase contributed to the stabilization of Pickering emulsion gel. This work presents a new strategy for the preparation of Pickering emulsion gel by using easily obtained clay particles.
研究领域:
材料科学
·
食品科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）