SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Haize Jin,Kaiqiang Hong,Junyi Liu,Chenxi Qiu,Mengyao Zhu,Cuixia Li,Qikun Wang
A powder, inorganic membrane and 3D printing cetyltrimethylammonium bromide (CTAB)-geopolymer adsorbents system for adsorbing tetracycline (TC) was developed. And the adsorption properties, adsorption mechanism, adsorption cycle application based on the dynamic pH of adsorption system were systematically investigated by experiment, characterization and density functional theory (DFT) calculation. The introduction of CTAB significantly increased the adsorption response to TC in the high alkaline environment caused by spontaneous alkali release of geopolymer. The adsorption of CTAB-geopolymer for TC was most efficient in the dynamic pH range corresponding to TC - species. The predominant influencing mechanism between CTAB-geopolymer with TC was electrostatic interaction assisted by the hydrogen bonding and n-π interaction. The powder adsorbent with 11 wt% CTAB can capture 92.38 % TC at 2 min and fitted the pseudo-second-order model, and was also suitable for adsorption of trace TC. Although the extension of the diffusion path of the monolithic adsorbents limited the adsorption rate, the 3D printed adsorbent showed an adsorption efficiency of 84.20 % at 302 min. The outstanding adsorption (4 times)-desorption (3 times) cycle properties of 11 %CT-GA (81.15 % at 24 min, 4th adsorption) and cycle cumulative adsorption efficiency of 11 %CT-3DP (59.23 % at 120 min, 4th adsorption) adsorbent were exhibited. Furthermore, a high accuracy performance prediction model with the mean R 2 value tended to 1 and the low root mean square error (0.0747) was provided, which can provide theoretical and technical reference for the subsequent industrial application of CTAB-geopolymer adsorbents.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Qianqian Yu,Haijun Wang,Chunlei Yuan,Tong Wang,Chao Yan
Due to the limitation of the intrinsic dielectric constant, the energy storage density of PVDF polymers cannot meet the needs of electronic materials. In this regard, this work focuses toward enhancing the dielectric and energy storage performance of PVDF by preparing PVDF nanocomposites impregnated with sepiolite modified with cetyltrimethylammonium bromide (CTAB@Sep) and carboxylated carbon nanotubes (C-MWCNTs). The results show that CTAB@Sep nanofibers can serve as efficient nucleation agents for γ-PVDF crystals. Furthermore, Sep nanofibers modified with CTAB can significantly promote the dispersion of C-MWCNTs through the electrostatic adsorption effect and then block the conductive path, therefore improving the dielectric and energy storage properties of PVDF-based composites. The dielectric constant of PVDF/CTAB@Sep/C-MWCNTs composites increases by 8 times compared with that of pure PVDF at 1 kHz, while the loss remains at only 0.08. Under an electric field of 110 kV·mm–1, the discharge energy density is 4.03 J·cm–3, and the energy storage efficiency reaches 81.85%. Therefore, this work provides an alternative strategy for preparing high-performance polymer-based energy storage materials under low field strength.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 17
·10023-10029
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IF 3.119
Yunwei Wei,Wei Zheng,Malik Zeeshan Shahid,Zhixiang Jiang,Yuehua Li,Zhongyao Duan,Guangning Liu,Xun Hu,Cuncheng Li
Compared with nanoscale quantum dots (QDs), the large-sized perovskite crystals not only possess better stability but also are convenient for application exploration. Herein, we develop a facile and efficient antisolvent vapor-assisted recrystallization approach for the synthesis of large-sized Cs4PbBr6 perovskite crystal microplates. In this method, for the first time, the shale-like Cs4PbBr6 microplates with lateral dimensions of hundreds of microns are fabricated by employing cetyltriethylammnonium bromide (CTAB) as a morphology-directing agent. FESEM, TEM, and AFM characterizations indicate that the as-obtained shale-like Cs4PbBr6 microplates are actually formed by 6–8 nm thick Cs4PbBr6 nanosheets with orientational stacking. Importantly, such highly crystalline Cs4PbBr6 microplates with shale-like morphology exhibit a narrow and intense green PL emission with a 59% PL quantum yield. Moreover, the planar structure of shale-like Cs4PbBr6 microplates makes it easy to form a preferred orientation on a substrate, which endow them with promising potential in optoelectronic devices such as lighting and displays.
研究领域:
材料科学
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纳米技术
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光电技术
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化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
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2024
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IF 2.5
Zhang Yanting
Both seed solution and Cetyltrimethylammonium bromide(CTAB) serve as common template agents in the synthesis of hierarchical ZSM-5 zeolites. However, their specific roles in the synthesis process have not been clearly understood. In this study, hierarchical ZSM-5 zeolites were successfully synthesized using a 1.5% mass fraction (relative to the silicon source) seed solution in combination with varying amounts of CTAB. The physical and chemical properties of the hierarchical ZSM-5 zeolites were characterized using X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), low-temperature N 2 adsorption-desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TG), ammonia temperature-programmed desorption (NH 3 -TPD), pyridine-IR, and 2,4,6-collidine-IR. The investigation revealed that the CTAB content significantly influenced the synthesis of hierarchical ZSM-5 zeolites, with CTAB contributing to framework filling, charge balancing, and acting as a mesoporous template during the synthesis process, while the seed solution primarily served as a structure-directing agent. Moreover, utilizing the conversion of C8 aromatic hydrocarbons as a probe reaction, it was demonstrated that ZSM-5 zeolites synthesized with the co-assistance of seeds and CTAB exhibited enhanced conversion for ethylbenzene and m-xylene compared to samples synthesized exclusively with a seed solution.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
Nanomaterials
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2018
·Vol. 8
·期 6
·376
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IF 3.504
Luhang Xu,Dengpo Huang,Huimei Chen,Xiaoling Jing,Jiale Huang,Tareque Odoom-Wubah,Qingbiao Li
Synthesis and applications of one dimensional (1D) metal nanostructures have attracted much attention. However, one-step synthesis of bimetallic nanowires (NWs) has remained challenging. In this work, we developed a microorganism-mediated, hexadecyltrimethylammonium bromide (CTAB)-directed (MCD) approach to synthesize closely packed and long Au-Ag NWs with the assistance of a continuous injection pump. Characterization results confirmed that the branched Au-Ag alloy NWs was polycrystalline. And the Au-Ag NWs exhibited a strong absorbance at around 1950 nm in the near-infrared (NIR) region, which can find potential application in NIR absorption. In addition, the Au-Ag NWs showed excellent surface-enhanced Raman scattering (SERS) enhancement when 4-mercaptobenzoic acid (MBA) and rhodamine 6G (R6G) were used as probe molecules.Keywords:microorganism-mediated;Au-Ag NWs;SERS enhancement;Pichia pastoriscells;CTAB
研究领域:
材料科学
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纳米技术
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生物化学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2020
·Vol. 50
·期 2
·562-567
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IF 4.174
Lubing Qin,Feng Zhang,Xiaoshuang Ma,Yun Tang,Guanyu Ma,Zhenghua Tang
To advance the development of atomically precise Ag and Ag-alloyed nanoclusters, it is critical to develop effective synthetic methods. Herein, we successfully extend the CTAB (cetyl trimethyl ammonium bromide) reverse micelle method to synthesize a high-purity Ag44(p-MBA)30 (p-MBA = para-mercaptobenzoic acid) nanocluster and its corresponding alloy cluster Au12Ag32(p-MBA)30 in a short time (15 min and 5 min), with a high yield of ∼83% and ∼85%, respectively. Furthermore, the mechanism regarding the reverse micelle method has been clearly elucidated. Through characterizing the reaction system by Raman spectroscopy and NMR spectroscopy techniques, it can be revealed that employing CTAB to form reverse micelles to construct a sealed chemical environment is critical for realizing the fast and high-yield synthesis.
研究领域:
材料科学
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化学
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DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Yi Jiang,Limei Zhang,Junlai Jiang,Suwen Li,Yanling Cao,Jinying Yue,Hao Gu
Detecting pressure plays a vital role in electronic skin, which holds vast potential for recognizing physiological signals within the human body. Conventional pressure detection devices frequently encounter issues such as limited detection ranges and low cyclic retention rates. This study utilizes electrostatic self-assembly to precisely deposit reduced graphene oxide (rGO) onto the substrate surface, thereby creating a highly sensitive pressure feedback layer upon reduction. Furthermore, electrostatic spinning is employed to fabricate poly(vinyl alcohol) fibers at the interface between the pressure feedback layer and the interdigitated electrodes, thereby augmenting device sensitivity. Sensors fabricated using this method demonstrate exceptional sensing capabilities across a broad pressure spectrum, achieving ultrahigh sensitivities of 195.44, 165.79, and 125.95 kPa–1 within the ranges of 0–2.7, 2.7–6.91, and 6.91–20 kPa, respectively. They exhibit a rapid deformation response of 92 ms and a fast deformation recovery of 70 ms. Moreover, these sensors display outstanding durability, maintaining over 80% cyclic retention after 10,000 loading–unloading cycles. Finite element numerical simulation results suggest that the rGO/CTAB/CMF composite material, prepared using this method, exhibits superior mechanical and sensing properties. Furthermore, by integration with a custom microprocessor, the sensor’s operational capability is significantly enhanced, enabling precise processing and analysis of limb signal data in everyday situations.
研究领域:
材料科学
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生物医学工程
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电子皮肤技术
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2017
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IF 4.784
Yanping Li,Huangzhong Yu,Xinxin Huang,Zuping Wu,Haihong Xu
We report a method to prepare molybdenum oxide thin films using the stable cetrimonium bromide-modified MoO 3 (CTAB-modified MoO 3 ) precursor solution . The effect of thermal treatment on the optical, crystalline, morphologic properties and surface wettability is greatly obvious because of the pyrolytic decomposition of CTAB. The highly efficient and stable polymer solar cells (PSCs) have been also fabricated by adopting CTAB-modified MoO 3 nanocomposite films as the novel and universal anode buffer layers (ABLs). The P3HT:ICBA based solar cells with CTAB-modified MoO 3 at 200 °C heat treatment exhibit an best power conversion efficiency (PCE) of 5.80% with long-term stability, and the PTB7:PC 71 BM based solar cells with CTAB-modified MoO 3 at 200 °C heat treatment show an best PCE of 8.34% with long-term stability, which are higher than that of the corresponding devices with PEDOT:PSS films. The improvement in device performance is mainly due to the agreeable electrical properties and enhanced charge extraction of the CTAB-modified MoO 3 ABLs, and CTAB modification to the MoO 3 surface can effectively passivate its surface traps, suppress the recombination loss of carriers. The surface of CTAB-modified MoO 3 films is also more hydrophobic than that of the PEDOT:PSS. In a word, these indicate the CTAB-modified MoO 3 films may be used as a novel and generally applicable hole transport layer for high-efficiency and ambient stable polymer solar cells.
研究领域:
材料科学
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能源技术
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光电化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Feiyue Wang,Xue Song,Yongde Liu,Jie Zhang,Jihong Zhao,Yue Chen
Diclofenac (DCF), a widely used pharmaceutical ingredient, exhibits long-lasting properties and significant ecotoxicity in aquatic ecosystems. In this study, a new granular adsorbent, GSBE@C H-CTAB , was synthesized to remove DCF by initially granulating powder spent bleaching earth carbon (SBE@C) with polytetrafluoroethylene (PTFE) emulsion as a binding agent, followed by a co-modification process involving H 2 SO 4 and cetyltrimethyl ammonium bromide (CTAB). The adsorption capacity of the prepared adsorbent for DCF under the best conditions was 4.26 mg/g. In a wide pH range, GSBE@C H-CTAB could maintain a high adsorption capacity and show a good reusability. The presence of the three cations inhibited the adsorption of DCF (inhibition effect: Mg 2+ >Al 3+ >Na + ). The adsorption process conformed to the pseudo-second-order kinetic model and Langmuir isotherm model. From the theoretical evaluation results, it could be inferred that DCF molecules were adsorbed on GSBE@C H-CTAB surface in both horizontal and non-horizontal directions at all operating temperatures. The main mechanisms of adsorption included electrostatic interaction, pore filling interaction, π-π interaction and H bond interaction. The granular adsorbent GSBE@C H-CTAB prepared in this study could effectively remove DCF, treat waste with waste, and solve the problem that powder adsorbent was easy to lose and difficult to recover, which was of great significance for the remediation of polluted water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Honglin Yu,Peng Zhang,Mengqi Liu,Daiming Liu,Guodong Zhang,Fei Wang
Although clathrate hydrates were thought to open the Pandora box of hydrogen moderate storage, poor hydration efficiency of hydrogen hydrates impedes its application in hydrogen economy. To improve the situation, an efficient kinetic promoter of cetyltrimethylammonium bromide (CTAB) was proposed to enhance the hydration efficiency of mixed H 2 and 1,3-dioxolane (DIOX) hydrates, the micro structures of which were characterized via Raman spectra. In DIOX system, when CTAB was introduced, hydrate induction time reduces by 91.4 %, hydrate growth rate increases by 185.2 %, and the storage capacity of hydrogen in hydrates is up to 0.582 wt% under a moderate condition (12 MPa, 274.15 K), which increases by 99.32 %. Potential mechanisms behind the enhancement were proposed, and it was deduced that CTAB changes the arrangement of interfacial water molecules and induces hydration shells, which decrease the nucleation energy barrier as confirmed by the profiles of differential scanning calorimetry (DSC), giving rise to fast hydrate nucleation. In addition, hydrogen molecules were thought to enter the cavity of CTAB micelles, which serve as hydrogen vehicles to enhance the mass transfer of hydrogen by interfacial capture and inner release, resulting in fast hydrate formation. To the best of our knowledge, CTAB presents the best promotion effect on the nucleation and growth of H 2 /DIOX mixed hydrates among known kinetic promoters, and this finding promotes the application of clathrate hydrates on hydrogen moderate storage a small step forward.
研究领域:
化学工程
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能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Guihong Han,Lulu Kou,Zhan Chu,Wenjuan Wang,Hongfei Ma,Bingbing Liu,Hu Sun,Shuzhen Yang,Yanfang Huang
Treatment of molybdenum-containing wastewater is crucial for mitigating the environmental threat of Mo(VI) ions and recovering valuable metals. Compared to conventional separation methods, adsorbing colloid flotation emerges as a viable way to efficiently remove Mo(VI) ions. However, the current colloidal adsorption reagents have constrained the development of adsorbing colloid flotation due to their poor removal efficiency and narrow solution pH range. To overcome these challenges, Zr(IV) salts and La(III) salts were employed as colloidal adsorption reagents for the first time to remove Mo(VI) ions from wastewater in this work. In particular, the differences in removal efficiency of Mo(VI) ions between Zr(IV) salts, La(III) salts and traditional Fe(III) salts were systematically evaluated over a wide solution pH range. Zr(IV) salts demonstrated robust pH stability, displaying a significant removal efficiency of over 70.00% for Mo(VI) ions during the colloidal adsorption stage across a broad solution pH range from 3 to 11. Even more astonishingly, the removal efficiency of Mo(VI) ions was further enhanced through the synergistic effect of cetyltrimethylammonium bromide (CTAB) during the flotation separation stage. Under the optimal conditions of bubble flotation, the solution turbidity decreased rapidly from 164.50 NTU to 3.33 NTU, and the removal efficiency of Mo(VI) ions reached an impressive 99.10% which was enhanced by 23.73% compared to the colloidal adsorption stage. In conclusion, Zr(IV) salts, serving as colloidal adsorption reagents, have overcome the limitations of traditional colloidal adsorption reagents and exhibit significant potential for the removal of Mo(VI) ions from wastewater.
研究领域:
环境科学
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化学工程
·
废水处理
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产品关联
DOI
高影响因子
Soft Matter
·
2022
·Vol. 18
·期 40
·7782-7793
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IF 4.046
Danhua Xie,Yulong Jiang
The combination of hydrophilic particles and surfactants provides a simple method to stabilize Pickering emulsions. The type and concentration of the particles and surfactants play important roles in the microstructure and rheological properties of the resulting emulsions. Herein, stable n-octane-in-water Pickering emulsions with tunable rheological properties were prepared using thread-like mesoporous silica nanoparticles (TMSNPs) and cetyltrimethylammonium bromide (CTAB) as emulsifiers. The CTAB concentration (CCTAB) highly affected the properties of emulsions, which were divided into three regions according to the results of large-amplitude oscillatory shear responses. In the low CCTAB range (0.03 mmol L−1 ≤ CCTAB ≤ 0.1 mmol L−1), the emulsions gelled with a high storage modulus . With CCTAB increasing, the value of emulsions, measured by the small-amplitude oscillatory shear, decreased from approximately 1000 Pa at 0.03 mmol L−1 to 100 Pa at 0.3 mmol L−1 and then to 40 Pa at 3 mmol L−1. A three-dimensional percolation structure formed by cross-linking of TMSNPs in the emulsion continuous phase was observed via cryo-SEM in the low CCTAB range but not in the intermediate and high CCTAB ranges. The mechanisms showing the synergistic stability and rheological properties of these emulsions were investigated. It is attributed to the unique morphology of TMSNPs and the competitive adsorption of CTAB molecules at the oil–water interface and on the nanoparticle surface in different CCTAB ranges. Moreover, owing to the porosity and hydrogen-bonding interactions between the TMSNPs and the confinement effect of the flocculated oil droplets, the viscoelasticity of the emulsions could be mediated by adding a trace amount of acid/base. This study provides a new strategy to regulate the rheological properties of emulsions. It also expands the Pickering emulsion systems with tunable rheological properties.
研究领域:
材料科学
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化学工程
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界面科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）