PHYSICA SCRIPTA
·
2025
·Vol. 100
·期 6
·065916
·
IF 2.6
Pouria Pourhosseinhendabad,Parisa Z Firouzabadi
Bentonite clay, nano-bentonite, and nano-clays are used in many industries such as medical, water purification, food processing, and drilling mud. But because impurities in low-grade bentonite occur, its efficiency is limited; therefore, purification and modification are carried out to enhance its quality. Cetyltrimethylammonium bromide (CTAB), cationic modifier, dispersants, and milling are used in this study's improved process for synthesizing nano-bentonite and industrial bentonite purification. CTAB was the preferred choice since it possessed the ability to modify further such parameters as surface charge, hydrophobicity, and cation exchange capacity, thus rendering bentonite more effective for its applications. The removal of impurities was mainly facilitated by the dispersants during sedimentation and centrifugation. The best sample, BMP 2 h, has shown a tremendous reduction in the cristobalite and calcite impurities with an increase in the beidellite phase as confirmed by x-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The process reduced particle size from raw bentonite 121.75 μm to 1.07 μm of BMP 2 h, which enabled improved dispersion. The enhanced purity and changed behavior of nano-bentonite reveal its potential for future industrial use in water treatment, catalysis, and drilling mud. This optimized method offers a cost-effective and efficient path to high-quality nano-bentonite, solving the limitations of current purification methods.
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 10
·4160-4167
·
IF 3.069
Fangxiao Wang,Yan-ming Liu,Chun-yang Zhang
Water splitting into hydrogen (H2) to produce clean energy is of great significance for sustainable development. Transition metal phosphides (e.g., Ni12P5 nanoparticles) may be used as non-precious earth-abundant electrocatalysts for the H2 evolution reaction, but their poor electronic conductivity and small surface area hinder efficient catalytic H2 production. In this research, we demonstrate for the first time the facile synthesis of porous carbon/Ni12P5 (C/NiP-C) composites with the dispersion of Ni12P5 nanoparticles onto a conductive porous carbon support in an ionic surfactant hexadecyl trimethyl ammonium bromide (CTAB)-mediated ethanol solution. The CTAB plays dual roles in the synthesis including (1) the introduction of carbon to increase the conductivity of the synthetic materials and (2) the formation of uniform Ni12P5 phosphides through the interaction between the H2PO2− anion, Ni2+, and C19H42N+ cation dissociated from CTAB. The obtained C/NiP-C composites may function as electrocatalysts for the hydrogen evolution reaction (HER) with excellent HER performance (η: 63 mV, η10: 176 mV, Tafel slope: 100 mV dec−1, wherein η represents the onset overpotential and η10 represents the overpotential required for a current density (j) value of −10 mA cm−2) compared with the NixPy composites synthesized in pure ethanol (η: 160 mV, η10: 392 mV, Tafel slope: 154 mV dec−1), the C/NiP-P composites synthesized in a P123-mediated ethanol solution (η: 75 mV, η10: 286 mV, Tafel slope: 210 mV dec−1), and the C/NiP-F composites synthesized in a F127-mediated ethanol solution (η: 80 mV, η10: 302 mV, Tafel slope: 189 mV dec−1). The enhanced HER performance can be attributed to the synergistic effects resulting from the unique structure of the porous C support and the well dispersed Ni12P5 nanoparticles.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2023
·
IF 10.7
Wenxin Jiang,Wei Xiang,Longquan Xu,Dan Yuan,Zhiming Gao,Bing Hu,Yanlei Li,Yuehan Wu
In the current study, complexes (CAMs) of alginate microgels (AMs) and hexadecyltrimethylammonium bromide (CTAB) were prepared, and further used to stabilize O/W emulsions. Physical properties and emulsifying capacity of CAMs with different CTAB concentration were investigated, which indicated emulsifying capacity of AMs could be extensively improved by CTAB. Improved stability against centrifugation (3000 rpm), pH value (2.0–8.0), and NaCl concentration (0–200 mM) was also reported in CAMs stabilized emulsions. Interfacial adsorption and morphology observation suggested that the interfacial activities of CAMs were benefited from CTAB complexing, and an interfacial layer could be observed on the surface of the CAMs stabilized oil droplets. In this work, even a slight amount of surfactant (0.4 mM, or 0.01456 wt% CTAB) could make remarkable improvement on the emulsifying performance of alginate microgels. However, excessive CTAB would result in over aggregation of AMs, which was not conducive to the emulsifying performance of CAMs. This study proposed that the surfactant complexing was a feasible strategy to improve the emulsifying performance of polysaccharide microgels.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wenwu Zhou,Yasong Zhou,Qiang Wei,Sijia Ding,Shujiao Jiang,Qing Zhang,Meifang Liu
Mesoporous Y composites which exhibit both crystallized micropores and large mesopores with narrow mesopore diameter distributions and controlled pore diameters were successfully synthesized. The composite is synthesized through an elaborate design of the SiO 2 @cationic surfactant cetyltrimethylammonium bromide (SiO 2 @CTAB) micelle swelled by an appropriate amount of 1,3,5-trimenthylbenzene (TMB); it is subsequently fabricated from the condensing of the Y zeolite precursors, which contain Y zeolite seeds, on the mesoscale micelle followed by a hydrothermal crystallization process. The effect of synthesis conditions such as the amounts of CTAB, TMB and TEOS added to the synthesis system on the physicochemical properties of the obtained products was examined. The as-synthesized materials were carefully characterized by employing XRD, N 2 adsorption–desorption, SEM, TEM and pyridine-adsorbed FTIR techniques. The mesoporous Y zeolite exhibited both the typical diffraction characteristics of Y zeolites in the wide-angle XRD pattern, and the typical diffraction characteristics of a narrowly dispersed mesopore structure in the small-angle XRD pattern is successfully synthesized for the first time. Finally, the adsorption capacity for DBT and 4,6-DMDBT by samples with different mesopore diameters were assessed by a batch method. Sample MY-0.5C-0.35T-0.9B showed the highest capacity for adsorbing DBT in model diesel, and sample MY-0.5C-0.35T-1.5B showed the highest capacity for adsorbing 4,6-DMDBT in model diesel. Most importantly, sample MY-0.5C-0.35T-1.5B showed the highest adsorptive rate for both DBT and 4,6-DMDBT, which is at least 10 times faster than that of sample MY-0C-0.35T-0B because of the elimination of the diffusion limitation.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 2.463
Xiangmin Miao,Zhiyuan Cheng,Zongbing Li,Po Wang
This work described a label-free platform for sensitive cholesterol detection upon the precipitation of cetyltrimethyl ammonium bromide (CTAB) stabilized gold nanoparticles (AuNPs). Modifying with CTAB, the stability of AuNPs was greatly improved compared to conventional used AuNPs, and the surface of them was positively charged, which could effectively adsorb with negatively charged DNA detection probe (DP) based on electrostatic adsorption, and inducing the precipitation of them. Tremendous H 2 O 2 would produce based on the reaction of cholesterol with oxygen by using cholesterol oxidase (ChO x ) as the catalyzer, and followed the happen of Fenton reaction in the presence of Fe 2+ to generate OH , inducing the cleavage of DP into DNA fragments. As a result, the adsorption ability of AuNPs decreased, accompanying with a decrease of AuNPs precipitation. Then, based on detecting the absorption spectra change of AuNPs in supernatant along with the increase of cholesterol concentration, sensitive and simple visual-based cholesterol detection was realized with a detection limit of 335 pM. Such method showed high selectivity for the detection of cholesterol. Moreover, the high stability of such AuNPs in solution that contained salt, protein or other metal ions, making our sensing method have a potential application in bioanalysis.
研究领域:
生物化学
·
医学检测
·
纳米技术
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DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 27
·期 1
·29-35
·
IF 1.947
Li Jie,zhang Jia,Chen Lianxi,Wen Zhuoqiong,Luo Jie,Yu Cui,Wang Pengpeng
In this study, vinyl-functionalized porous silica (V-P-SiO 2 ) and ureido-functionalized porous silica (UD-P-SiO 2 ) have been synthesized separately by using hexadecyl trimethyl ammonium bromide (CTAB) and sodium dodecyl sulfonate (SDS) as mixed templates. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectrum (FTIR) and N 2 adsorption–desorption measurement. The results showed that UD-P-SiO 2 with a diversity of morphologies were obtained by judiciously chosen mole ratio of SDS to CTAB (R = n SDS :n CTAB ). On the contrast, the mole ratio of surfactants had less effect on the morphologies of V-P-SiO 2 until the mole ratio of SDS to CTAB was reached 1.6, however, FTIR proved that it had effect on the vinyl groups in the V-P-SiO 2 network framework.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 4
·期 3
·568-580
·
IF 4.696
Fan Zhang,Jian Zhu,Hui-Qin An,Jian-Jun Li,Jun-Wu Zhao
In this work, a facile and effective two-step separation strategy that combined both CTAB and CTAC has been proposed that enables the purification of gold nanotriangles on a large scale. The resulting nanotriangles exhibit straight edges and sharp corners, with a narrower size distribution. The separation of size or morphology could be achieved by utilizing different surfactants. It was found that CTAB served as a size separation agent and CTAC served as a shape separation agent in the separation process. The optimum concentrations were found to be 0.167 M CTAB for size separation and 0.222 M CTAC for shape separation respectively. By simply adjusting the concentration and the sequence of CTAB and CTAC, we were able to exquisitely separate nanotriangles from the crude gold nanoparticles. Furthermore, the separation mechanism has also been discussed based on surfactant depletion-induced aggregation on different contact areas of the nanoparticles. The proposed two-step separation strategy holds great potential to be extended to the separation of other nanoparticles with anisotropic shapes and different sizes, improving the high yield of anisotropy with great uniformity, which will eventually facilitate SERS-based applications.
研究领域:
纳米技术
·
材料科学
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DOI
高影响因子
LUMINESCENCE
·
2020
·Vol. 35
·期 7
·1036-1042
·
IF 1.855
Xiaoxiao Sun,Yuqi Zhao,Xiaoqian Cui,Ruxin Liu,Miao Yu,Qiang Fei,Qingwen Liu,Guodong Feng,Hongyan Shan,Yanfu Huan
A highly sensitive and selective colorimetric analysis method based on unmodified gold nanoparticles (AuNPs) to detect iodide ions (I − ) in solution in the presence of hexadecyl trimethyl ammonium bromide (CTAB) and mercury ions (Hg 2+ ) has been successfully developed. Hg 2+ could form a gold amalgam with AuNPs to protect AuNPs from CTAB-induced aggregation caused by the electrostatic attraction between CTAB and citrate ion-covered AuNPs. When a mixture of Hg 2+ and I − was added to the solution of AuNPs, the formation of the HgI 2 complex destroyed the protection of Hg 2+ for AuNPs, which led to the aggregation of AuNPs accompanied with the change in colour of the solution from red to grey black and decrease in the absorbance of AuNPs at 520 nm. There was a good linear relationship between A 520nm and I − concentration from 0 to 800 nM with a low limit of detection (LOD) of 4.2 nM. Furthermore, this simple and reliable colorimetric sensor has been applied successfully to the detection of I − in practical samples.
研究领域:
分析化学
·
纳米技术
·
环境科学
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产品关联
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 76
·期 4
·928-938
·
IF 1.197
Zhang Yefei,Liu Chao,Luo Lijun,Shi Yingying,Chen Yu,Wang Shan,Bian Longchun,Jiang Fengzhi
A stable SiO 2 material marked as CTAB-Ms(x) was synthesized by a novel sol-gel method. It was modified with hexadecyl trimethyl ammonium bromide (CTAB), which resulted in high adsorption capacity. Its microstructure and surface functional groups were characterized by scanning electron microscope, transmission electron microscope and Fourier transform infrared. The results showed that CTAB-Ms(x) had a core/shell structure in which the core was a CTAB micelle and the shell was SiO 2 . The prepared material was applied to adsorb bisphenol A (BPA). Pseudo-first-order kinetics equation, pseudo-second-order kinetics equation, Langmuir adsorption isotherm model, Temkin adsorption isotherm model, and thermodynamic equations were used to fit and analyze the experiment results. The theoretical maximum adsorption capacities calculated according to linear and non-linear forms of the Langmuir isotherm were 370.37 mg·g −1 and 198.80 mg·g −1 , and the adsorption equilibrium time was 120 min. A mechanism study showed that the high adsorption capacity was attributed to the solubilization effect of the CTAB micelle.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境污染治理
·
吸附材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 6
·5842-5847
·
IF 2.986
Lirong Yang,Chunmei Wang,Zhigang Liu,Xiaoyu Liu,Yang Song,Xiaoxin Feng,Baoqiang Zhang
Anatase TiO 2 coatings prepared by solvothermal process in a neutral ethanol solution of isopropyl titanate at 160 °C have been grown on slag wool fibers (SWF) which were modified by hexadecyltrimethylammonium bromide (CTAB) in advance. X-ray diffraction patterns confirmed the coatings are of a nanocrystalline anatase structure, and scanning electron microscopy observations and energy-dispersive X-ray spectrum revealed a continuous coverage of TiO 2 formed on the fiber surfaces. The photocatalytic activity of the samples was tested by the photocatalytic degradation of methylene blue (MB) solution. The results show that CTAB modified slag wool fibers (CMSWF) are not a suitable adsorbent for MB due to their weaker negative surface charges. Anatase TiO 2 coated CMSWF display higher photocatalyst activity than anatase TiO 2 coated SWF without CTAB modification, and Anatase TiO 2 coated CMSWF are relatively stable under UV-light irradiation.
研究领域:
材料科学
·
环境功能材料
·
表面改性
·
光催化
·
纳米涂层
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 12
·779
·
IF 2.9
Zeng Guanli,Zou Yilingyun,Feng Qi,Yang Hang,Liu Zisen,Wu Zhenbin,Zhang Yi
This study delves into the potential of vermiculite-based adsorbents for phosphate removal from aqueous solutions. CTAB and zirconium-modified natural vermiculite slices (CZV) were employed, with XRF analysis confirming successful zirconium loading. The Langmuir model indicated monolayer adsorption behavior, suggesting a preferential adsorption characteristic. The presence of coexisting ions showed varied effects on phosphate removal, with increasing CO 3 2− concentrations slightly inhibiting phosphate removal by CZV, while increasing NO 3 − , SO 4 2− , and Cl − concentrations improved phosphate removal by all adsorbents. Notably, the vermiculite adsorbents, despite their larger particle size, demonstrated a competitive adsorption capacity when compared to other adsorbents. The practicality of these adsorbents is further emphasized by their potential direct application in artificial wetlands and lakes without posing ecological risks. Moreover, the reutilization of used vermiculite adsorbents is highlighted as a sustainable approach, considering their beneficial effects on the growth of submerged macrophytes and sediment microecological environments. The adsorption mechanism is attributed to surface complexation and ligand exchange. This research underscores the efficacy of modified natural vermiculite slices in phosphate adsorption, paving the way for broader environmental applications and offering a promising solution to water purification challenges.
研究领域:
环境科学
·
水处理
·
吸附技术
·
材料改性
·
生态工程
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DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Di Shang,Xinru Wang,Haiyu Lei,Jiamin Wei,Hualin Lin,Sheng Han
Generalizable anode via interfacial kinetics: MXene scaffold + conversion chalcogenide + surfactant-guided control. • Nb 2 C: 2D percolation network and stress buffer; FeS 2 : high capacity; CTAB: nanospheronization, uniform anchoring, C–S–C linkages. • In situ hydrothermal + electrostatic guidance: Nb 2 C@FeS 2 @CTAB heterostructure with expanded interlayers and uniform current. Nb 2 C@FeS 2 @CTAB heterostructured composite anode was fabricated via a dual-phase modification strategy to enhance the electrochemical performance of lithium-ion batteries. The constructed heterointerface markedly shortens Li + migration pathways within the active phase and reduces the energetic barriers (0.36 eV) for ion migration and diffusion, thereby improving high-rate capability and energy storage performance. Experiments demonstrate that the Nb 2 C@FeS 2 @CTAB composite delivers excellent rate characteristics and high capacity, achieving a discharge specific capacity of 1296 mAh g −1 and stable operation for 100 cycles. Moreover, at a high current density of 5 A g −1 , it maintains a discharge specific capacity of 219 mAh g −1 with robust cycling stability over 2000 cycles. These findings offer a new design paradigm for FeS 2 -based anodes and underscore the potential of Nb 2 C@FeS 2 @CTAB heterostructures for high-performance battery applications.
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DOI
高影响因子
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