CHEMICAL PHYSICS LETTERS
·
2017
·
IF 1.815
Shiliang Wei,Kun Jia,Hongguo Shou,Xuefei Zhou,Pan Wang,Xiaobo Liu
Polyarylene ether nitrile (PEN) is traditionally used as high performance thermoplastics in various advanced engineering materials fields. However, the preparation of optically active PEN based materials, especially in aqueous solution, is still a great challenge. In this work, the side chain carboxylated PEN can be readily dissolved in alkaline solution but showing strongly quenched luminescence. Fortunately, the cationic surfactant of cetyltrimethylammonium bromide (CTAB) was able to recover the fluorescence emission of water soluble PEN, which can be subsequently quenched by Fe 3+ ions, leading to the selective determination of Fe 3+ ions in aqueous solution.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Shuang Qiu,Jinghua Du,Yonghou Xiao,Qidong Zhao,Gaohong He
Ultra-deep removal of thiophene sulfides from transportation fuel via adsorption has aroused great attention under the pressure of gradually demanding environmental regulations. The development of high-efficiency adsorbents is the key to adsorptive desulfurization for producing clean transportation fuels. In this work, a microwave-assisted synthesis method was applied to rapidly fabricate hierarchical porous defective HKUST-1 (DEHKUST-1) towards removing benzothiophene from model fuel by selective adsorption. The effects of cetyltrimethylammonium bromide (CTAB) dosage, adsorption temperature and adsorption contact time on the DEHKUST-1 desulfurization performance were systematically investigated. The characterization results proved that both metal clusters and linker defects were generated in the as-prepared DEHKUST-1. CTAB as template could modulate the pore distribution and introduce reasonable defects in the framework of HKUST-1. At CTAB: Cu 2+ = 0.5 by mole ratio, a regular mesoporous distribution of 25–30 nm could be obtained with DEHKUST-1; it exhibited an impressive enhancement in adsorptive desulphurization performance. The maximum adsorption capacity of the adsorbent attained 14.4 mg S/g adsorbent at 20 °C in 4 h. Even after CTAB-H-0.5 was regenerated six times, its adsorption capacity remained 93% as that of the as-prepared adsorbent. An adsorption mechanism was proposed to illustrate the promoting desulfurization performance by introduction of hierarchical porous in HKUST-1. By virtue of the rapid synthesis and remarkable benzothiophene removal capacity, the DEHKUST-1 could be a potential adsorbent in desulfurization from real fuels.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Jiasheng Zhou,Zimo Lou,Zheni Wang,Chuchen Zhou,Cheng Li,Shams Ali Baig,Xinhua Xu
The CTAB-Pd/GAC catalyst was obtained by functionalizing palladium/granular activated carbon (Pd/GAC) with cetyltrimethylammonium bromide (CTAB), which was used for the electrocatalytic reductive dechlorination of 2,4-dichlorobenzoic acid (2,4-DCBA). The degradation rate of 2,4-DCBA by 40 mg g −1 CTAB-Pd/GAC was 9.8 × 10 −3 (min −1 g −1 Pd), which was 11 folds than that by Pd/GAC (0.9 × 10 −3 min −1 g −1 Pd), and the value of q e, 2,4-DCBA / q e, BA was 2.33 as compared to 0.67 for Pd/GAC. The combined result of dechlorination and adsorption experiments suggested that the functionalization by CTAB would enhance the 2,4-DCBA concentration on the surface of CTAB-Pd/GAC, and accelerate the degradation rate. However, the removal efficiency of 2,4-DCBA would decrease when the CTAB load reached 80 mg g −1 , due to the excessive adsorption capacity for dechlorinated product. Density functional theory (DFT) calculations also proved that CTAB would increase adsorption capacity of catalyst and selective adsorption behavior of 2,4-DCBA, which accelerated the degradation rate of 2,4-DCBA.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2020
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IF 4.389
Huiqiong Yan,Xiuqiong Chen,Chaoling Bao,Jiling Yi,Mengyuan Lei,Chaoran Ke,Wei Zhang,Qiang Lin
The research goal of the present study was to develop a carrier for loading and controlled -release of the hydrophobic drug with the combined use of organo-montmorillonite (OMMT) and alginate. The OMMT was synthesized through the intercalation modification of sodium montmorillonite (Na-MMT) with cationic cetyltrimethylammonium bromide (CTAB), nonionic nonylphenol polyoxyethylene ether (NPE) and the mixture of them via simple and convenient wet ball-milling method. Furthermore, the organo-montmorillonite/alginate (OMMT/Alg) composite hydrogel beads with slow and controlled release properties were constructed by using alginate as a coating material under the exogenous cross-linking of calcium ions. The physical and chemical properties of OMMT were comparatively evaluated by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), thermogravimetric analyzer (TGA), BET-specific surface area measurements, and drug adsorption experiments. Experimental results showed that the presence of CTAB was able to facilitate the intercalation of CTAB/NPE into Na-MMT through the cation exchange reaction. And the cationic CTAB and nonionic NPE were adsorbed or intercalated into the MMT lamellar structure through the wet ball-milling process, which could change the hydrophilic nature of Na-MMT and improve its affinity to the hydrophobic drug molecules. In addition, the OMMT/Alg composite hydrogel beads displayed superior sustained-release properties than Na-MMT/Alg, mainly ascribed to the good affinity of OMMT to hydrophobic drug that retarded the drug diffusion. In particular, CTA/NPE-MMT/Alg with the highest loading capacity (LC) and encapsulation efficiency (EE) revealed the optimal controlled performance for the release of hydrophobic ibuprofen. The release followed the Korsmeyer–Peppas model suggested non-Fickian diffusion release mechanism. Based on the high drug loading capacity and excellent controlled drug release properties, the CTA/NPE-MMT/Alg incorporating hydrophobic drugs into hydrophilic matrices could be a highly promising material for use in hydrophobic drug delivery.
研究领域:
药剂学
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材料科学
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药物传递系统
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DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 26
·期 1
·127-139
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IF 2.289
Zeng Tianbiao,Zhang Chuhong
The precursor synthesis of the LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) is usually operated in NaOH/NH 3 ·H 2 O aqueous system, and the pH value and the liquid feeding rate need strict control. Herein, a simple synthesis method was investigated without pH and liquid feeding rate control by using urea as the precipitation agent. The relationship of the metal ions’ concentration to the homogeneity of the precursor was studied in detail. To decrease the lattice disordering ratio and increase the reversible capacity of the NCA, polar CTAB molecules were added into the CO(NH 2 ) 2 /H 2 O system. The lattice disordering ratio of the NCA was decreased and the integral electrochemical performances were improved. The stable reversible capacity of the battery in 0.1, 0.5, 1, 2, 3, 4, and 6 C can reach to 188, 173, 167, 162, 152, 143, and 125 mAh g −1 . It is expected that the simple synthesize method may provide some inspiration to the NCA cathode research.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Particuology
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2024
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IF 4.1
Yao Wei,Hong Wu,Haowen Kong,Yingju Miao,Ping Wang
Despite significant attention being drawn to the synthesis of zeolites from fly ash for CO 2 adsorption, few studies have focused on hierarchical porous NaX zeolites derived from fly ash. The existing synthesis methods are often complex, and the role of CTAB in zeolite formation remains unclear. To address these research gaps, we employed a one-step method for synthesizing hierarchically porous fly ash-based NaX zeolites with tunable mesoporosity. Utilizing CTAB as a template agent, we conducted a comprehensive investigation into the effects of varying CTAB dosages and aluminum source types on zeolite formation. The synthesized materials were fully characterized through XRD, FTIR, SEM, TEM, and N 2 adsorption/desorption analysis. The results showed that the mesoporous volume of the zeolites can be effectively controlled by adjusting the CTAB/Al 2 O 3 ratio. At an optimal ratio of 0.04, the synthesized zeolite has a surface area of 422 m 2 /g and a mesoporous volume of 0.116 cm 3 /g, which represents a two-fold increase compared to the NaX synthesized without CTAB. This improvement of mesoporosity significantly reduces the resistance to CO 2 diffusion, thereby enhancing the adsorption performance with a maximum adsorption capacity of 3.37 mmol/g and a high cyclic stability. A further investigation reveals the crucial role of CTAB in promoting mesopore formation and inhibiting crystal growth during zeolite synthesis. These findings provide valuable insights into the one-step synthesis of hierarchical porous zeolites.
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
ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Huiwen Wang,Sihao Wu,Zoujun Peng,Xiulin Wang,Juanhua Lai,Ping Qiu
The quantitative analysis of glyphosate has significant implications for the evaluation of food quality and environmental safety risks. First, copper nanoparticles (Cu NPs) were synthesized using cetyltrimethylammonium bromide (CTAB) as a stabilizing agent, which resolved the limitation associated with atmospheric oxidation of Cu NPs and provided excellent fluorescence stability. Interestingly, the fluorescence of blue-emitting CTAB-Cu NPs was quenched by pH-responsive p-nitrophenol (p-NP) via Förster resonance energy transfer. Herein, a dual read-out sensor based on CTAB-Cu NPs and p-NP was constructed for glyphosate detection. Specifically, acetic acid (HAc) from acetylcholine (ACh) via hydrolysis catalyzed by acetyl cholinesterase (AChE) reduced the pH of the mixed solution and prevented the loss of protons from p-NP, which allowed the fluorescence emission by CTAB-Cu NPs. The presence of glyphosate inhibited the activity of AChE, and the increased pH resulted in proton loss. The fluorescence intensity of CTAB-Cu NPs was quenched, and the solution color changed from colorless to yellow with a UV absorption peak at 400 nm. The sensor can detect ultra-trace levels of glyphosate residues with a limit of detection of 5.43 ng/L. The obtained biosensor was successfully utilized to monitor the degradation of glyphosate in the roots of cabbage and cultivated soil.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
高影响因子
Sustainable Chemistry and Pharmacy
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2025
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IF 5.8
Lili Long,Zhenkun Wang,Yuelong Liu,Wei Liu
Biobased cyclic carbonates can be produced by renewable bio-epoxides with CO 2 through a cycloaddition reaction. The reaction has gradually gained attention due to its green, sustainable, and widespread application of cyclic carbonates. However, the primary challenge in synthesizing bio-cyclic carbonates is the recovery and effective utilization of catalysts. In this work, the recovery and reuse of homogeneous catalysts have been achieved successfully. Cetyltrimethylammonium bromide (CTAB) combined with N-hydroxysuccinimide (NHS) (1:1) were used as co-catalyst to synthesize bio-cyclic carbonates from epoxidized soybean oil fatty acid methyl esters. 93.7% yield for cyclic carbonates product was achieved at 120 °C with 15 bar CO 2 pressure for 14 h without any solvents. The most importance is that the homogeneous catalyst can be successfully reused for consecutive four times. Through kinetic experiments, it was found that the addition of NHS reduced the activation energy of the reaction by 12.94 kJ/mol. In addition, a reasonable reaction mechanism was proposed. This work paves the way about a recyclable catalyst system for synthesis of bio-cyclic carbonates.
研究领域:
化学工程
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绿色化学
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催化化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Jiayu Li,Lin Zhang,Haiyan Wang,Qun Cui
The post-Li 2 CO 3 precipitation liquor (the residual raffinate after Li 2 CO 3 precipitation with pH of 10–12), referred to as the mother liquor, still contains 20 ∼ 25 % of unrecovered Li + . Efficiently extracting lithium ions from the mother liquor has become one of the key challenges to enterprises. A titanium-based ion sieve precursor (LTO-Co/CTAB) was prepared via simultaneous doping of cobalt (II) acetate tetrahydrate ((CH 3 COO) 2 Co·4H 2 O) and cetyltrimethylammonium bromide (CTAB) by solid-phase synthesis method. After acid washing of LTO-Co/CTAB, the Co/CTAB co-doped titanium-based ion sieve (HTO-Co/CTAB) was characterized by XRD, SEM, XPS, etc. Adsorption isotherms and kinetics of Li + on HTO-Co/CTAB, along with its Li + /Na + and Li + /K + separation selectivity in the mother liquor were investigated. The results showed that the solid-phase Co doping coupled with CTAB-assisted dispersion enabled successful nano-scale refinement and functional modification of HTO-Co/CTAB. The formation of Co-O-Ti bonds, lattice distortions and its short diffusion paths of nanoparticles (100–200 nm) were all beneficial for the diffusion and enrichment of Li + within the channels of HTO-Co/CTAB. The adsorption behavior of Li + on HTO-Co/CTAB was well-described by Langmuir isotherm adsorption model ( R 2 = 0.996) and pseudo-second-order kinetic model ( R 2 = 0.996). An equilibrium uptake capacity of HTO-Co/CTAB for Li + in the mother liquor (initial concentration of Li + , Na + and K + was 1450, 33,800 and 6900 mg/L) could reach 39.78 mg/g, which was 39 % higher than that of HTO, and the equilibrium time was shortened to 5 h compared to HTO (20 h). The separation factors of Li + /Na + and Li + /K + for HTO-Co/CTAB were 677.45 and 284.43, respectively, and it had excellent stability.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 43
·期 8
·4719-4730
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IF 1.369
Bao Lina,Wang Hong,Zhou Changqing,Cui Lu,Xin Baifu
The synthesis of high activity TiO 2 –CTAB–SiC composite possessing the microwave absorption capacity has been reported. Herein, the commercial Silicon carbide (SiC) particles were used as the microwave absorbent and supporter. TiO 2 nanopowders were loaded on the surface of SiC modified by hexadecyl trimethyl ammonium bromide (CTAB) via the hydrothermal route. The as-prepared TiO 2 –CTAB–SiC composite was characterized by X-ray diffraction, field-emission scanning electron microscopy, Fourier transformed infrared spectra, inductively coupled plasma-atomic emission spectrometry and fluorescence emission (PL). Its photocatalytic activity was evaluated by the degradation of rhodamine B in the microwave discharge electrodeless lamp (MDEL) system. The experimental results showed that TiO 2 –CTAB–SiC composite exhibited obviously higher photocatalytic activity in the MDEL system compared with pure TiO 2 nanopowders. Their reusability and separation performance were evaluated by recycling experiments. The reasons for the improvement in photocatalytic performance were discussed in detail.
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
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 51
·77851-77863
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IF 5.19
Jiang Changjin,Zhang Ting,Li Shuhui,Yang Zhaoguang
Fe(III)-chitosan and Fe(III)-chitosan-CTAB composites were prepared using an ionotropic gelation method. Various techniques were used to analyze the morphology, structure, and property of the adsorbents, including SEM, EDS, FT-IR, XPS, and zeta potential. Compared with Fe(III)-chitosan, Fe(III)-chitosan-CTAB was more effective for As(V) adsorption at a wide range of pH (3.0–8.0). The adsorption of As(V) onto Fe(III)-chitosan and Fe(III)-chitosan-CTAB could reach equilibrium in 20 min, and their maximum adsorption capacities were 33.85 and 31.69 mg g ‒1 , respectively. The adsorption kinetics was best described by the pseudo-second-order model ( R 2 = 0.998 and 0.992), whereas the adsorption isotherm was fitted well by the Freundlich model ( R 2 = 0.963 and 0.987). The presence of H 2 PO 4 – significantly inhibited the adsorption of As(V) onto Fe(III)-chitosan and Fe(III)-chitosan-CTAB, and humic acid also led to a slight decrease in As(V) adsorption by Fe(III)-chitosan-CTAB. Over 94% of As(V) at the initial concentration of no more than 5 mg L –1 was removed from real water by the two adsorbents. 1% (w/v) NaOH solution was determined to be the most suitable desorption agent. Fe(III)-chitosan and Fe(III)-chitosan-CTAB still maintained their initial adsorption capacities after five adsorption–desorption cycles. Based on different characterization results, both electrostatic attraction and surface complexation mechanisms played important roles in As(V) adsorption on Fe(III)-chitosan and Fe(III)-chitosan-CTAB.
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
PubMed
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 9
·2200439
·
IF 4.149
Bo Long,Jia Chen,Ziyang Zhao,Huilan Ye,Yiting Wu,Weiming Zhou,Liwei Wang,Zhanhui Yuan
Co – B has outstanding catalytic activity in catalyzing the hydrolysis of ammonia borane (AB) to produce hydrogen and has been widely studied and applied. However, the high surface energy and magnetic properties of Co – B catalysts make the particles easily agglomerate and have few active sites. Herein, a novel compound Ag/Co – B/CTAB with high catalytic activity is prepared by chemical reduction. The compound Ag/Co – B/CTAB is characterized by Fourier-transform infrared, X-Ray diffraction, X-Ray photoelectron spectroscopy, and transmission electron microscopy, which show that Ag + in the compound Ag/Co – B/CTAB is reduced entirely to Ag acting as an atomic barrier to improve dispersion of Co – B due to a large specific surface area (168.8153 m 2 g −1 ). Moreover, the performance of Co – B doped with Ag in the hydrolysis of AB is studied and the compound Ag/Co – B/CTAB has a hydrogen generation rate of 17.685 L min −1 ·g −1 at 30 °C with a low activation energy of 13.33 kJ mol −1 . The work on the Ag/Co – B/CTAB catalyst provides an essential insight into developing efficient hydrogen-producing catalysts by regulating the electron transfer between metal and Co – B.
研究领域:
材料科学
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催化化学
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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）