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
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Boyan Fu,Leyao Bi,Kexin Zhao,Jiahui Lin,Junsheng Wen,Chunjie Wang,Yue Wang
In this study, LaFeO 3 nanoparticles were synthesized using the hydrothermal method with three different types of surfactants (cationic, anionic, and non-ionic). The products were characterized with various techniques to determine their phase structures, morphologies, sensing abilities, and electrochemical performance. The results indicate that LaFeO 3 prepared with cetyltrimethylammonium bromide (CTAB) as a surfactant (LFO-C) showed a pure orthorhombic perovskite phase with a highly porous surface morphology, and exhibited the largest specific surface area and the lowest impedance among the three materials. The gas-sensing properties of corresponding sensors were also investigated. It is worth noting that LFO-C demonstrated remarkable sensitivity to ethanol at the temperature of 220 °C, with the response reaching 16.1 and a response/recovery time of 35.1 and 25.2 s, respectively. The response of LFO-C is more than twice that of the other two samples with sodium dodecylbenzenesulfonate (SDBS) and polyethylene glycol (PEG) as surfactants. Moreover, LFO-C sensor demonstrated a detection limit of 500 ppb. These findings suggest that CTAB as a cationic surfactant can effectively enhance the gas-sensing performances of LaFeO 3 . Furthermore, the adsorption energy of three samples was calculated by first-principles calculation, and LFO-C possessed strong adsorption capacity for ethanol.
研究领域:
材料科学
·
化学
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DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Hongyang Wu,Yanfang Huang,Bingbing Liu,Guihong Han,Shengpeng Su,Wenjuan Wang,Shuzhen Yang,Yubin Xue,Shuangqing Li
Hazardous metal pollution became a severe environmental issue in China. An efficient precipitation-flotation process was developed to achieve fast removal for metal-ions from wastewater. Structure and strength of precipitate particles/flocs significantly influence the flotation removal of metal-ions. Formation and growth-evolution of precipitate flocs in precipitate flotation were studied by stage analysis of precipitate particles-formation, flocs-regulation and flotation separation. The results demonstrate that early formed precipitates MHA(humics-metal complexing particles) have small particle size, high fractal dimension, low strength and recovery factor. The addition of Fe 3+ and CTAB(cetyl trimethyl ammonium bromide) reagents make the precipitate particles aggregated to flocs(MHA-Fe, MHA-Fe-CTAB) much more large, loose, coarse, and small-density. The final generated MHA-Fe-CTAB flocs are hard to be broken up, easy to be recovered and efficient to be separated by flotation process. The flotation removal of MHA-Fe-CTAB flocs is clearly higher than that of MHA or MHA-Fe. The flotation results of MHA-Fe-CTAB are as follows: flotation removal of 98.7 ± 0.40%–99.9 ± 0.10%, residual TOC of 0.96 ± 0.38–1.35 ± 0.41 mg/L and turbidity of 0.44 ± 0.09–0.63 ± 0.16 NTU. Introducing Fe 3+ and CTAB reagents into flotation solution contributes to the growth-evolution of precipitate flocs, which could intensify the metal-ions removal via precipitate flotation process and result in more ideal purification indexes for metal-containing wastewater.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Chunyun Ma,Yan Zhang,Chuankai Yang,Yuhang Zhang,Miaorong Zhang,Jianguo Tang
Cetyl trimethyl ammonium bromide (CTAB)-activated lipase-mineral hybrid microflowers (CTAB-Lip-MHFs) were fabricated via biomineralization using Cu 3 (PO 4 ) 2 ⋅3H 2 O as the mineral for olive oil hydrolysis. FT-IR spectra indicated that immobilized lipase molecules in CTAB-Lip-MHFs has good structural integrity, and XPS spectra revealed that immobilized lipase molecules were present at the surface of CTAB-Lip-MHFs. Kinetic studies suggested that CTAB-Lip-MHFs had good substrate affinity ascribed to interfacial effect caused by CTAB, meanwhile, the open conformation of lipase activated by CTAB contributed to increased reaction rate with substrate. The generated fatty acids via hydrolysis of olive oil by CTAB-Lip-MHFs were 146% of that by free lipase, moreover, CTAB-Lip-MHFs could retain 76.5% and 93.2% of initial activities after storage at 50 °C for 10 h and 4 °C for 30 days, respectively, indicating the good stability of CTAB-Lip-MHFs. In addition, after 5 recycles, CTAB-Lip-MHFs preserved 72.7% of initial activity, demonstrating the favorable reusability of CTAB-Lip-MHFs for fatty acid production.
研究领域:
生物化学
·
酶工程
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产品关联
DOI
高影响因子
GEOFLUIDS
·
2022
·
IF 2.006
Liang Zhang,Fujian Zhou,Guofa Lei,Bingyu Ge,Yuan Li,Guolin Yu,Longhao Zhao,Bojun Li,Erdong Yao
Nanomaterials can be used to emulsify and reduce the fluid viscosity, reduce pore pressure, and increase injection volume. Therefore, nanomaterials have a great potential in the enhanced oil recovery. However, the current research on nanooil flooding materials mostly focuses on the evaluation of the oil-displacing effect, and the lack of research on the size of the oil-displacing materials for tight oil is obvious. In this work, 1T phase molybdenum disulfide nanosheets were prepared by one-step hydrothermal method, which were further modified with CTAB powders to obtain MoS2-CTAB nanosheet powders. Combined with SEM, TEM, and AFM methods, the nanosheets were optimized based on the appearance and morphology. The stability, wetting reversal, and oil displacement capacity of selected nanosheets were tested. The results show that the best experimental condition to synthesize small-sized molybdenum disulfide is 200°C in the weak acid environment through 12 h. Due to the steric hindrance effect of the CATB molecule, the size and interlayer gap of MoS2 nanosheets increased slightly after modification. The layer gap reaches to 0.7 nm, and the number of stacked layers is 3~4 layers. Strong Raman bands are observed at 137 cm-1, 291 cm-1, and 391 cm-1, which indicates that the synthesized product is 1T MoS2. The modified MoS2 nanosheets in aqueous solution have better dispersion than the unmodified one. After the Zeta test, it was found that the absolute value after modification became lower, indicating that the modification of nano-MoS2 was effective. Moreover, the MoS2-CTAB can complete the wetting reversal within 4 h and make the interfacial tension reach 0.89 mN/m at 0.005 wt%, which greatly reduces the capillary pressure. The enhanced oil recovery effect of MoS2-CTAB nanosheets increased by 85.7% compared with that before modification and 62.5% higher compared with pure surfactant.
研究领域:
石油工程
·
材料科学
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Xiuli Shao,Siqi Wang,Youhui Zhou,Xuan Zhang,Haizhou Tian,Zheng Wang,Zhong-Yong Yuan,Huanting Wang
The ZSM-5 zeolite nanosheets are highly desired materials for catalytic reactions and membrane separation . Their synthesis depends on specially designed complex surfactants ; however, the high-cost limits their large-scale industrial production. Herein, the tailored synthesis of coffin-shaped multilamellar ZSM-5 composed of orderly stacked 2D nanosheets is carried out using cetyltrimethylammonium bromide (CTAB) as a structure-directing agent (SDA) in the presence of silicalite-1 seed sol. The morphology and b -axis thickness of nanosheets is controlled by adjusting the amount of silicalite-1 seed sol, CTAB/TEOS ratio, SiO 2 /Al 2 O 3 ratio, and synthesis time. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis indicate that the hydrophobic tail of CTAB acts as an inhibitor, effectively preventing the continuous growth along b -direction with an average thickness of 20–100 nm. This work highlights the role of silicalite-1 seed sol and CTAB in the orderly stacked sheets growth process. This crystallization strategy opens a facile and inexpensive approach for multilamellar ZSM-5 zeolite fabrication with 2D-nanosheets structures, and their practical applications in catalytic conversions of bulky molecules.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2024
·
IF 8.3
Yupeng Dang,Feng Zhu,Dongxu Wang,Shihua Yu,Yen Wei,Dandan Han
Intercalation chemistry/engineering has attracted much attention in the development of electrochemical energy storage. This study employs a green synthesis method to insert cetyltrimethylammonium bromide (CTAB) into Cu 2-x Se at room temperature, thereby producing a Cu 2-x Se doped material with an expanded interlayer spacing and a nanoplate array structure. Reversible insertion/extraction of Zn 2+ in Cu 2-x Se-CTAB is facilitated through an intercalation reaction mechanism, as evidenced by ex situ X-ray diffraction (XRD) and ex-situ X-ray photoelectron spectroscopy measurements (XPS). Moreover, the CTAB adsorbed on the surface of the zinc anode can regulate the deposition of Zn 2+ and inhibit the formation of dendrites. Benefiting from the above advantages, Cu 2-x Se-CTAB shows a high specific capacity of 661.4 mAh·g −1 at 0.1 A·g −1 as an electrode material for zinc ion batteries, delivered an extraordinary rate capability of 230.2 mAh·g −1 at 3 A·g −1 and excellent cycling stability. Theoretical calculations further demonstrate that the incorporation of CTAB diminishes the electrostatic repulsion between zinc ions and the matrix, facilitating rapid diffusion kinetics of zinc ions, and effectively mitigating the dissolution and volume expansion of the cathode. In addition, a Zn||Cu 2-x Se-CTAB pouch cell has been assembled, delivering a high capacity of 176 mAh·g −1 at 1.0 A·g −1 after 600 cycles and exhibiting a superior long cycling stability. This work highlights the potential of CTAB as a promising solution, providing new opportunities for the development of high-performance rechargeable ZIBs.
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
TALANTA
·
2025
·
IF 6.1
Mingyue Luo,Xin Xue,Kehui Zhang,Honghong Rao,Ruibin Qiang,Panpan Sun,Marcin Frankowski,Zhonghua Xue
Multi-signal sensors possess immense potential for point-of-care testing, yet their widespread adoption is hindered by reliance on complex nanomaterial synthesis or fragile enzymatic systems. Herein, we propose a “six-in-one” multi-mode sensor for rapid iodide ion (I - ) detection, leveraging only three commercially available reagents: chloroplatinic acid (H 2 PtCl 6 ), hexadecyl trimethylammonium bromide (CTAB), and 3,3’,5,5’-tetramethylbenzidine (TMB). The core innovation lies in a dynamic “on-off-on” oxidation triggered by target I - ions as follows: H 2 PtCl 6 with strong oxidative capacity directly oxidizes TMB to its two-electron product (TMB 2+ ) (“On” State). CTAB coordinates with H 2 PtCl 6 thereby blocking its surface and completely inhibiting TMB oxidation (“Off” State). I - selectively displaces CTAB via competitive coordination, partially restoring H 2 PtCl 6 ’s oxidation activity to generate the one-electron product (TMBox) (“Reactivation” State). Remarkably, the resulting TMBox exhibits six distinct signal outputs including visual and fluorescent color, absorbance, fluorescence, temperature, and electrical current. Compared to conventional single- or dual-mode methods, our six-mode approach improves reliability of detection results. This “magic cube” signals enables dual-mode qualitative analysis and four-mode quantitative detection, achieving a nanomolar-level detection limit for I - detection. Critically, multi-mode sensor operates via one-step mixing without requiring nanomaterials, enzymes, or specialized equipment. We further demonstrate its utility in detecting I - in biological (urine, serum), food (iodized salt) and environmental (Yellow River water, tap water) samples with recovery rates of 96.3% - 110.0%. Statistical analysis demonstrated excellent reproducibility with relative standard deviations <3.1% across repeated measurements. This work redefines the paradigm of multi-mode sensing, offering a cost-effective, field-deployable solution for environmental monitoring and clinical diagnostics.
研究领域:
分析化学
·
医学诊断
·
环境监测
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产品关联
DOI
PubMed
高影响因子
Nanoscale Research Letters
·
2017
·Vol. 12
·期 1
·1-7
·
IF 2.833
Dai Caili,Zhang Yue,Gao Mingwei,Li Yuyang,Lv Wenjiao,Wang Xinke,Wu Yining,Zhao Mingwei
In this work, a novel nanoparticle-enhanced wormlike micellar system (NEWMS) was proposed based on the typical wormlike micelles composed of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal). In order to strengthen the structure of wormlike micelles, silica nanoparticles are used to design the novel nanoparticle-enhanced wormlike micelle. The stability and morphologies of silica nanoparticles were studied by dynamic light scattering (DLS) and transmission electron microscopy (TEM) at first. After the formation of NEWMS, the rheological properties were discussed in detail. The zero-shear viscosity of NEWMS increases with the addition of silica nanoparticles. Dynamic oscillatory measurements show the viscoelastic properties of NEWMS. Through comparison with the original wormlike micelles, the entanglement length and mesh size of NEWMS are nearly unchanged, while the contour length increases with the increase of silica concentration. These phenomena confirm the enhanced influence of silica nanoparticles on wormlike micelles. The formation mechanism of NEWMS, especially the interactions between wormlike micelles and nanoparticles, is proposed. This work can deepen the understanding of the novel NEWMS and widen their applications.
研究领域:
化学
·
材料科学
·
胶体与界面科学
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Shuaiqi Wang,Congxin Wang,Hao Liu,Donge Wang,Xiaoping Wang,Lin Yang,Peng Li,Zhijian Tian
In this work, two ZSM-12 zeolites with stellar morphology and dendritic morphology were synthesized from the synthesis system containing nanorod-aggregated hexagonal prism seed and microrod seed, respectively, in the presence of CTAB. The stellar ZSM-12 zeolite was composed of core and branches, while the dendritic ZSM-12 zeolite consisted of stem and branches. For the two zeolites, the branches grew on {310} planes of seed and were in twin relation with the seed. The c -axes of branch and seed were parallel to each other, while the b -axes of them exhibited the angular relation of 65°. The crystallization process of the two zeolites were investigated by using XRD , SEM, and TEM characterizations. It was demonstrated that the branched growth on seeds was controlled by two factors: diffusion of reactive species and adsorption of CTAB. The Mullins-Sekerka instability occurred under the diffusion-limited condition, resulting in the formation of branches on seed. The adsorption of CTAB on side facets of branches inhibited the occurrence of secondary branching.
研究领域:
材料科学
·
结晶学
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产品关联
DOI
高影响因子
PHYSICA SCRIPTA
·
2024
·Vol. 100
·期 1
·015024
·
IF 2.6
Tingfei Chen,Yanzhi Huang,Xiaojun Liu,Chunnan Zhu,Chao Liu,Dongyun Zheng
The accurate and rapid detection of catechol which is a class of highly toxic organic phenolic compounds, is of great importance for the protection of environment and human health. In this work, a novel electrochemical sensor for catechol was constructed by modifying multi-walled carbon nanotube paste microelectrode with a cationic surfactant of cetyltrimethylammonium bromide (CTAB) through a simple and controllable adsorption method. Electrochemical experiment results show that the modified electrode has good sensitization effect to the electrochemical response of catechol. The electrochemical response mechanism of the sensor to catechol were investigated through using many analytical methods, including scanning electron microscopy, energy-dispersive spectroscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, and electrochemical techniques. Under the optimal fabrication and application conditions, the response current of catechol on the sensor exhibits a good linear relationship with its concentration from 1.0 μmol l−1 ∼ 7.0 mmol l−1 with a sensitivity of 1.33 nA/(μmol l−1) and a low detection limit of 15 nmol l−1 (S/N = 3). Applying the sensor in the detection of catechol in tap water samples and urine samples, the results were satisfactory, indicating its good application prospect.
研究领域:
环境科学
·
分析化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 14
·1094
·
IF 3.2
Jiang Shukang,Zheng Guangwei,Zhang Fengqing,Yu Hongwen,Cai Yongfeng,Zhang Yanli
The surface plasmon resonance (SPR) effect demonstrated by noble metal nanoparticles has been shown to significantly boost the photocatalytic activity of semiconductors under visible light. However, the high cost limits their practical use. Recent studies have found that bismuth (Bi), a non-noble metal, exhibits similar SPR properties. In this work, we developed a new synthesis method for Bi/Bi 2 WO 6 photocatalysts using a secondary solvothermal process. The metallic Bi was reduced in situ with tartaric acid as the reducing agent, while hexadecyltrimethyl ammonium bromide (CTAB) served as a surfactant to control the morphology. The Bi/Bi 2 WO 6 heterojunction prepared with an optimal CTAB amount (0.02 g) showed much better light absorption, achieving 100% degradation of Rhodamine B (RhB) within 15 min under visible light, representing a 57% improvement over pure Bi 2 WO 6 . Recycling tests confirmed the exceptional photochemical stability and recyclability. The high performance in RhB degradation can be linked to the SPR effect of metallic Bi, which improves light absorption, produces active sites and reactive species, and speeds up carrier transfer. Additionally, the formation of the Bi/Bi 2 WO 6 Schottky heterojunction promotes carrier separation and prevents recombination of photogenerated electron–hole pairs. This study also offers a clear mechanism for the photodegradation process of the synthesized photocatalyst. Overall, this work presents a new and affordable strategy for developing high-performance photocatalytic systems, with great potential for practical applications in environmental cleanup and pollutant removal.
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DOI
高影响因子
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