CORROSION SCIENCE
·
2018
·
IF 4.862
Jun-Bo Xu,Yun-Qing Cao,Lu Fang,Ji-Ming Hu
We present a simple one-step method of preparing inhibitor-loaded mesoporous silica nanocontainers without extra steps such as template removal or inhibitors loading. The synthetic method is based on the high solubility of organic inhibitors in hydrophobic cores of template micelles. The resultant inhibitor (benzotriazole) and cetyltrimethyl ammonium bromide (CTAB) co-loaded silica nanocontainers had high uptake of inhibitor (∼16 wt.%) and possessed H + ion-responsive inhibitor release property. When examined by scanning vibrating electrode technique, the coating doped with these nanocontainers exhibits effective corrosion protection property. These results suggest that the one-step synthetic method was efficient, energy-saving and organic solvents-free among others.
研究领域:
材料科学
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化学工程
·
腐蚀科学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2015
·Vol. 17
·期 10
·1-11
·
IF 2.184
Hu Nan,Li Rui,Wu Zhao-liang,Huang Di,Li Hong Zhen
Foam flotation is a promising technique for recovering nanoparticles from their highly diluted suspensions. In this work, a novel S type internal was developed to intensify the foam flotation of CuO nanoparticles (357.6 nm in average particle size) from their suspension of 6.2 × 10 −2 mmol/L. By enhancing foam drainage, the S type internal increased the enrichment ratio of CuO nanoparticles by 139.3 ± 12.5 % without significantly affecting their recovery percentage. Under the optimal conditions of Cetyl trimethyl ammonium bromide (CTAB) concentration 0.45 mmol/L, superficial airflow rate 2.6 mm/s, and volumetric feed rate 1.0 mL/min, the enrichment ratio and recovery percentage of CuO nanoparticles reached 81.6 ± 4.1 and 95.4 ± 4.9 %, respectively, using the foam flotation column with the S type internal. Furthermore, about 95 % CTAB could be recycled by recovering CTAB from the foamate and the residual solution. The recovered CuO nanoparticles were associated with CTAB molecules, so they had better dispersity and dispersion stability than the starting CuO nanoparticles. Therefore, they would have good reusability.
研究领域:
化学工程
·
纳米技术
·
材料科学
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环境工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
J. Li,L.X. Chen,X. Li,C.C. Zhang,F.L. Zeng
In this study, a facile and effective surface hydrophobic layer protected selective etching strategy has been adopted to fabricate organic functionalized hollow silica nanospheres (OHSNSs). Our experiments demonstrated that the morphology and structure of OHSNSs were greatly affected by the types of organosilanes and concentrations of cetyltrimethylammonium bromide (CTAB) as pore-making agent. At low concentration of CTAB (1.9 mg/mL −1 ), it was found that the protective effect of the hydrophobic layer of 3-thiocyanatopropyltriethoxysilane (TCPTES) was so strong that can be endured long time etching (8 h), leading to the formation of hollow core and organic porous shell structure. And yet, the protective effect of the hydrophobic layer of vinyltriethoxysilane (VTES) was too weak to withstand alkali etching, resulting in preferentially etched of the outer vinyl protection shell. Whereas, at a higher concentration of CTAB (2.5 mg/mL −1 ), for TCPTES, the irregular and capsules-like spheres were obtained. In contrast, for VTES, porous core/solid shell structures with shell thickness of 16 nm were generated. In addition, no particles were observed when the CTAB concentration was above 2.5 mg/mL −1 .
研究领域:
纳米技术
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2020
·Vol. 74
·期 4
·261-267
·
IF 1.073
Chaoqiang Pan,Jianmin Qiu,Lumei Wang,Zhiyu Yan,Weiwen Huang,Dongwei Zhang,Xuejia Zhan,Guoqing Shen,Chaoqiang Pan,Jianmin Qiu,Lumei Wang,Zhiyu Yan,Weiwen Huang,Dongwei Zhang,Xuejia Zhan,Guoqing Shen
This paper proposes a colorimetric aptasensor for the detection of testosterone (TES) in environmental water, using TES-specific aptamer (apT5) as a sensing probe, gold nanoparticles (AuNPs) as indicator, and hexadecyltrimethylammonium bromide (CTAB) as inducer, respectively. Based on competition between TES and CTAB for apT5, the aptamer can form an aptamer–TES complex, leaving CTAB free to aggregate AuNPs in the presence of TES. Dispersed and aggregated AuNPs have different absorption wavelengths and the signal of absorption intensity is associated with the concentration of TES, so TES can be detected quantitatively based on the signal absorption intensity. This sensitive aptasensor for TES detection has a wide linear range (R = 0.998) from 1.91–800 nM and a limit of detection (LOD) of 1.91 nM. In addition, this aptasensor has high selectivity over some interferents. The method detects TES in tap water samples with recoveries in the range of 98.9–102.6 % (RSD ≤ 7.35 %). This biosensor presents a good and potential application to rapidly detect TES in actual environmental water samples.
研究领域:
分析化学
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环境科学
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纳米技术
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生物传感器
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产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 10
·1-9
·
IF 2.584
Zhang Yu,Cao Ping,Lin Wei,Liu Qiang,Chen Ziyuan,Cao Jun,Yang Guannan,Cui Chengqiang
In this paper, a mixed sintering accelerator of colophony and cetyltrimethyl ammonium bromide (CTAB) was developed to improve the sintering properties of Cu nanoparticles (NPs) paste. With the synergy effect of the mixed sintering accelerator, Cu NPs paste could be well sintered at 260 °C for 30 min under a pressure of 2 MPa, and the shear strength was greatly improved from 15 to 33 MPa. The fracture morphology of the Cu NPs joint transformed from brittle interface failure features to ductile dimple features, and the porosity in the sintered layer was significantly reduced. XRD analysis further confirmed that the synergy of colophony and CTAB could effectively remove the oxides in the Cu NPs paste during sintering, and thereby improve the sintering properties. This work can provide an applicable approach to improve the sintering properties of metal NPs and help to understand the synergy effect of sintering accelerators on the bonding behaviors of metal nanoparticles at low temperatures. Graphic abstract
研究领域:
材料科学
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纳米技术
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化学工程
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DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-15
·
IF 5.3
Yang Rong,Wang Qian,Zhu Ling,Shen Xiaodong,Cao Yang,Wang Yifeng,Xin Wenbo
A facile, one-pot synthesis method is proposed for the in situ growth of multibranched gold (Au) mesocrystals on polydopamine (PDA)-modified three-dimensional (3D) carbon nanotube (CNT) foams using cetyltrimethylammonium bromide (CTAB) and silver nitrate (AgNO 3 ) as shape-directing agents. The synthesized Au mesocrystals exhibit complex 3D architectures composed of ultra-long branches (exceeding 1 μm) with sharp tips and serrated edges. Their morphology can be precisely tuned on CNT foams by adjusting the concentrations of CTAB and AgNO 3 in the growth solutions. The resulting CNT foam-multibranched Au mesocrystal hybrids exhibit high surface-enhanced Raman scattering (SERS) sensitivity, enabling the detection of rhodamine 6G and thiram at concentrations as low as 1 × 10 –11 M and 1 × 10 –10 M, respectively. Additionally, the 3D SERS substrates exhibit excellent uniformity, reproducibility, and long-term stability, maintaining high SERS activity after 10 weeks of storage. Importantly, the SERS substrates achieve sensitive detection of thiram on apple peels down to 2.4 ng/cm 2 . This work provides a promising strategy for the efficient fabrication of high-performance 3D SERS platforms for practical sensing applications. Graphical
研究领域:
材料科学
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纳米技术
·
分析化学
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表面科学
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环境监测
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 59
·34457-34464
·
IF 3.049
Lingmei Yang,Huiwen Li,Jun ying Fu,Ming Li,Changlin Miao,Zhongming Wang,Pengmei Lv,Zhenhong Yuan
In this article, a novel nano-rod-shaped SAPO-11 molecular sieve (SAPO-11-A-F) with a thickness of ca. 100 nm was successfully fabricated by the in situ seed-induced steam-assisted method using the cationic surfactant cetyltrimethylammonium bromide (CTAB) as a mesoporous template and a nonionic copolymer poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide), F127, as the crystal growth inhibitor. The fabricated nano-rod-shaped SAPO-11-A-F possessed nanocrystalline size, a hierarchical porous structure, and enhanced acidic sites. The added CTAB was mainly used to enhance the mesoporous structure and acid, and F127 acted as a grain growth inhibitor. According to the orientation growth mechanism of the molecular sieves, the crystallization mechanism of the nano-rod-shaped hierarchical porous molecular sieves with different crystallization times was investigated. It was found that the nano-rod-shaped molecular sieves were formed by the accumulation of nano-sheets. Compared to three nickel catalysts with different silicoaluminophosphate SAPO-11 molecular sieves in the hydroisomerization of oleic acid to iso-alkanes, the bifunctional catalyst of 7% Ni/SAPO-11-A-F had higher isomeric selectivity (79.8%); in particular, the isomeric octadecane showed stronger selectivity, indicating that the nano-rod-shaped SAPO-11 molecular sieve is more beneficial for the hydrodehydration reaction.
研究领域:
材料科学
·
化学工程
·
催化
·
纳米技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 48
·18061-18068
·
IF 4.39
Jiahui Guo,Xueqing Feng,Songrui Wang,Qikang Wu,Shanshan Lv,Yan Zhou,Han Li,Zheng Chen,Yuzhong Zhang
Novel hexagonal α-cobalt hydroxide nanosheets are synthesized through a 2-methylimidazole-induced hydrolysis strategy with cetyltrimethylammonium bromide (CTAB) as a surfactant. The weak alkaline environment provides favorable conditions for the formation of metastable α-Co(OH)2, while the same raw material will produce β-Co(OH)2 when a strong alkali solution is used. CTAB plays a vital role not only in hexagonal oriented growth, but also in the formation of the hydrotalcite-like structure of α-Co(OH)2 with high crystallinity. The crystallinity of both α- and β-Co(OH)2 is very poor without CTAB as a surfactant. The Co in this Co(OH)2−x layer presents most of the CoII and a small part of the CoIII, and the interlayer nitrate anion balances the positive charge of the host layer. The redox function produced by the CoII and CoIII of α-Co(OH)2 together with the large layer spacing jointly promotes the electron and mass transfer. The use of hydrazine hydrate for transfer hydrogenation involves the transport of protons and electrons produced by decomposition, and the rapid transport is bound to be conducive to the reduction process. Nitro compounds with varieties of functional groups can be smoothly reduced to the corresponding amines with high selectivity, when α-Co(OH)2 was used as a catalyst under mild conditions.
研究领域:
材料科学
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催化
·
化学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Miaomiao Ye,Chenxing Li,Ningyao Tao,Yangyi Xiao,Xueyan Li,Tuqiao Zhang,Xiaowei Liu
Seawater desalination based on air–water interfacial solar heating is considered to be one of the effective methods to solve the freshwater shortage crisis in islands. However, the high temperature of the air–water interface unavoidably makes volatile organic compounds (VOCs) such as phenolic compounds volatilize into the condensed freshwater, resulting in freshwater pollution. In this work, solar evaporators with different photothermal materials such as carbon black, MoS 2 and carbon nanotubes were modified with cetyl trimethyl ammonium bromide (CTAB) and were applied for both solar evaporation and inhibition of phenolic compounds from entering condensed freshwater. The distillation rates (R D ) of 10 phenolic compounds could be significantly reduced. For example, the R D value of phenol was reduced from 77% to 4.6%, which was mainly due to the electrostatic force between the quaternary ammonium group of CTAB and phenol, the binding effect of CTAB micelle on phenol, as well as the hydrogen bond between phenol and air-laid cloth in the evaporator. In addition, the phenolic compounds with the boiling point above 230 °C have R D values all below 10%, while the R D values of phenolic compounds with the boiling point below 230 °C are significantly correlated with n-octanol/water partition coefficient (logK ow ) values with a correlation coefficient R 2 of 0.915. This work demonstrates that the CTAB-modified solar evaporators can be used for clean condensed freshwater production during solar-driven seawater desalination.
研究领域:
环境科学
·
化学工程
·
材料科学
·
水处理
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DOI
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Fanglin Dai,Shenghui Zhou,Xingzhen Qin,Detao Liu,Haisong Qi
Catalytic transfer hydrogenations of biomass-derived carbonyl compounds to produce corresponding alcohols are important pathway for biomass transformation. Herein, a facile route was developed to synthesize the surfactant-assisted heterogeneous acid-base bifunctional 4,5-imidazoledicarboxylic acid-hafnium hybrid catalyst (Hf-H 3 IDC-T) by hydrothermal self-assembly method. The as-prepared Hf-H 3 IDC-T was characterized by SEM and TEM, FT-IR spectra, N 2 adsorption-desorption, X-ray diffraction patterns (XRD), X-ray photoelectron spectroscopy (XPS), Thermogravimetry analysis (TG), NH 3 /CO 2 -TPD, NMR, GC MS, ICP-OES and elemental analysis. Hf-H 3 IDC-T hybrid had mesoporous structure and acid-base couple sites. A quantitative yield (99.2%) of furfuryl alcohol (FFA) was obtained from furfural (FUR) over Hf-H 3 IDC-T using 2-propanol as the hydrogen source under mild conditions. It's found that the amino groups on the imidazole ring is beneficial to enhance the base sites of catalyst. Meanwhile, the addition of hexadecyl trimethyl ammonium bromide (CTAB) as template agents can improve the specific surface area of the catalyst. Dynamic analysis showed that the apparent activation energy of FUR reduction was as low as 50.89 kJ / mol. The as-prepared catalyst has good stability and can be recycled. Finally, the catalyst also has a good catalytic effect on the hydrogenation reaction of aldehydes and ketones of biomass-derived compounds.
研究领域:
催化
·
材料科学
·
化学工程
·
有机化学
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产品关联
DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2022
·Vol. 25
·期 4
·527-536
·
IF 1.972
Jun Chen,Zhiyu Huang,Dongfang Liu,Ying Zhang,Hanmin Li,Hongsheng Lu
In the process of the tertiary recovery of oil and gas resources, it is necessary to use external fluids to displace the crude oil in the reservoir. Whether the crude oil on the surface of the rock can be effectively displaced and the wettability of the rock can be changed to avoid re-adsorption by the crude oil is directly related to the level of oil recovery. Therefore, it is critical to study the cleaning and wettability reversal of reservoir rock surface. Because microemulsions have outstanding performance in changing the wettability of rocks and solubilizing crude oil, this paper uses cetyl trimethyl ammonium bromide (CTAB) as a surfactant and n -butanol as a co-surfactant to prepare microemulsions. The performance of microemulsions with different microstructures on the cleaning and wettability changes of crude oil on the rock surface were studied. The results show that the water-in-oil (W/O) microemulsion has good cleaning efficiency, and the oil removal rate on the sandstone core surface can reach 79.65%. In terms of changing the wettability of the rock surface, W/O, bi-continuous phase (B.C.) and oil-in-water (O/W) microemulsions can change the core surface from lipophilic to hydrophilic. And the effects of the B.C. and O/W microemulsions are more obvious. The microemulsion system that was prepared based on cationic surfactants has a good application prospect in changing the wettability of the reservoir and cleaning the adsorbed crude oil.
研究领域:
石油工程
·
化学工程
·
表面活性剂科学
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产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2018
·Vol. 87
·期 1
·147-155
·
IF 1.745
Wang Yu,Chen Lianxi,Liu Zhenhui,Li Jie,Wang Pengpeng
The simple and effective synthesis of well-defined organosilica hollow nanospheres (OHNSs) for fundamental research and practical applications is still a significant challenge. In this work, a facile “cationic surfactant-induced selective etching” strategy was developed for the fabrication of hollow thiocyanatopropyl silsesquioxanes (thiocyanatopropyl-SQ), mercaptopropyl silsesquioxane (mercaptopropyl-SQ) from cyanoethyl-SQ@thiocyanatopropyl-SQ and cyanoethyl-SQ@mercaptopropyl-SQ, respectively. The experiments demonstrated that cetyltrimethylammonium bromide (CTAB) had remarkable influence on the formation of hollow structure and could accelerate the etching process significantly. A formation mechanism initiated by the adsorption of cationic surfactant followed by the etching of inner core with NH 3 ·H 2 O was proposed. Hollow thiocyanatopropyl-SQ and mercaptopropyl-SQ with various shell thickness could be prepared by manipulating the amount of CTAB. And large-scale OHNSs were obtained at appropriate concentration of CTAB through this strategy. Moreover, this strategy might be further extended to fabricate OHNSs with other worthy functional groups.
研究领域:
材料科学
·
纳米技术
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）