Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Mengying Xu,Pier-Luc Tremblay,Muhammad Babur Joya,Abanchime Zenaba Hadja Kaka,Emmanuel Seneway Kollah,Blessings Kapungwe Mwansa,Wenhao Wang,Yang Liu,Xiaolin Xing,Feijun Qiu,Tian Zhang
Humic acids (HAs) in water react with chlorine disinfectants and form carcinogenic chemicals. These molecules also inhibit environmental engineering processes aiming at the removal of toxic metals and organic contaminants from wastewater. For these reasons, low-cost adsorption strategies are being developed to take out HAs from water. Here, the metal oxide Bi 2 MoO 6 with either exposed [001] (BMO-001-Br) or [010] (BMO-010-Br) facets prepared with the cetyltrimethylammonium bromide (CTAB) surfactant was evaluated for the adsorption of HAs. With a maximal adsorption capacity for HAs of 63.1 mg/g, BMO-001-Br nanosheets constituted a superior adsorbent capable of removing contaminants over a large pH range. BMO-001-Br was reusable and could separate HAs from multiple solutions including tap water, synthetic wastewater, and real pharmaceutical wastewater. The adsorption capacity of BMO-001-Br can be explained by its suitable specific surface area and its positive surface charge related to the presence of CTAB molecules attracting negatively charged HA molecules. A third feature of BMO-001-Br involved in HAs removal is a high abundance of oxygen vacancies, which are easier to form on a BMO surface with exposed crystal [001] facets. The notable performance of BMO-001-Br indicates that it can serve efficiently for the extraction of HAs from different aqueous solutions.
研究领域:
环境工程
·
水处理
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Heng Quan Yang,Lei Miao,Cheng Yan Liu,Chao Li,Sawao Honda,Yuji Iwamoto,Rong Huang,Sakae Tanemura
Antimony telluride (Sb2Te3) and its based alloys are of importance to p-type semiconductors for thermoelectric applications near room temperature. Herein, we report a simple, low-energy intensive, and scalable surfactant-assisted reflux method for the synthesis of Sb2Te3 nanoparticles in the solvent ethylene glycol (EG) at low temperatures (120–180 °C). The formation mechanism of platelike Sb2Te3 nanoparticles is proposed. Also, it is found that the size, shape, and chemical composition of the products could be controlled by the introduction of organic surfactants (CTAB, PVP, etc.) or inorganic salts (EDTA-Na2, NaOH, etc.). Additionally, the collected Sb2Te3 nanoparticles were further fabricated into nanostructured pellets using cold-compaction and annealing techniques. Low resistivity [(7.37–19.4) × 10–6 Ω m], moderate Seebeck coefficient (103–141 μV K–1), and high power factor (10–16 × 10–4 W m–1 K–2) have been achieved in our Sb2Te3-nanostructured bulk materials. The relatively low thermal conductivity (1.32–1.55 W m–1 K–1) is attained in the nanobulk made of PVP-modified nanoparticles, and values of ZT in the range of 0.24–0.37 are realized at temperatures ranging from 50 to 200 °C. Our researches set forth a new avenue in promoting practical applications of Sb2Te3-based thermoelectric power generation or cooling devices.
研究领域:
材料科学
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纳米技术
·
热电学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ming Liu,Nan Sun,Ruohan Xu,Tallat Munir,Shiyang Bai,Jihong Sun
The surfactant involvement in hydrothermal synthesis system of clinoptilolite (CP) is an effective strategy for regulating self-assemble of the aluminosilicate species. Herein, using cetyltrimethylammonium bromide (CTAB) as surfactant, the CTAB-assisted influences on nucleation behavior of CP were demonstrated via various characterizations. Especially, small angle X-ray scattering patterns were used to investigate the fractal structural evolutions of aluminosilicate species in their sol-gel phase. The results indicated that the primary building structural units with 8- and 10-membered rings appeared in the early induced stage gradually aggregated into the worm-liked particles with the prolonged crystallization time. Among them, the nucleation process was initiated by reorganization via the solution-mediated transport and thereafter appeared the pseudo-layered structures with the core (aluminosilicate species)-shell (CTAB) features at the liquid-solid interfaces. The irregulated lamellas with the heulandite structures increased in size of around 70 nm until reaching the maximum of 90 nm, then followed the occurrences of the re-dissolving and repaid growth. Especially, the lamellar nuclei growth showed the transformations from loose mass fractals to dense surface fractals with the extensions of the induced time. In which, the interfacial solvation layer thickness increased from 1.04 to 2.87 nm for CTAB-assisted CP, thicker than that (0.63–2.08 nm) for pure-CP. These demonstrations suggested that the additive CTAB in the induced stage inhibited the agglomeration of the aluminosilicate species and following growth of the crystal nuclei via the solvated attachments pathway. Finally, using the irregulated particle as an adsorbent, the CO 2 adsorption and CO 2 /CH 4 selectivity were preliminarily explored.
研究领域:
材料科学
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化学工程
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物理化学
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纳米技术
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吸附科学
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矿物学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Qiming Zhuo,Wenli Liu,Penghui Wang,Jiushuai Deng,Peng Xi,Yuzhe Hua
The precise separation of macerals is the premise and foundation for the efficient utilization of coal resources, and flotation is the separation method with the greatest industrial potential. The differences in the surface hydrophobicity of macerals provide the basis for flotation, but the complexity of their surface properties makes separation challenging. In this study, sub-bituminous coal was used to obtain vitrinite and inertinite , and a detailed analysis was carried out on the samples. The surface morphologies of vitrinite and inertinite were observed in the QI TM (quantitative imaging) mode of AFM (atomic force microscope) to explore the adsorption of the reagents. The effect of the reagents on the interaction forces between the coal particles and bubbles was measured to reveal the change in hydrophobicity. The attachment performance of macerals under different reagent treatments was investigated using a laboratory-built apparatus. Overall, the results demonstrated that the difference in zeta potential between vitrinite and inertinite was a viable approach for separating the macerals. CTAB adsorption on coal samples changed the surface morphology and the interaction force between particles and bubbles. Interestingly, CTAB adsorption on the gas–liquid interface decreased the interaction force. Vitrinite and inertinite attachment performances were enhanced when Al 3+ and SDS were used simultaneously.
研究领域:
矿物加工
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表面化学
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煤炭科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Dongxiang Li,Xing Qian,Changshuo Lian,Rui Huang,Ziyi Hao,Ming Cheng,Shuping Li,Chunfang Li,Shahid Iqbal,Lianjie Qin,Jikuan Zhao
The critical micelle concentration (CMC) is one main parameter of surfactants , so an accurate, rapid, and convenient method for CMC determination is of great significance for surfactant applications. In this paper, three samples of carbon quantum dots (CQDs) with different fluorescence properties were developed as fluorescent probes for the CMC determination of CTAB , SDS , Triton X-100, perfluoro OBS and Pluronics® P-123. The fluorescence excitation and emission spectra of a constant amount of the CQDs in different concentrations of the surfactant solution were recorded, and then the CMC values of the surfactant were deduced from the fluorescence intensity change and the Stokes shift variation. The obtained CMC data using three samples of the CQDs agree well with those in the published literature. It is also demonstrated that in the micellization process the interaction between the CQDs and the surfactant molecules is complicated, because the fluorescence properties of the CQDs are found to be related to the characteristics of the CQDs, the head group type of ionic surfactants , the chemical structure between the hydrophobic and hydrophilic segment, and the chemical nature of the hydrophobic chains of the surfactants. So, the CQDs are demonstrated to be located at the palisade layer in the surfactant micelles due to the surface-attached polar groups on the CQDs although the CQDs are mainly hydrophobic as fluorescent probes. The fluorescent CQDs are considered to be new choices of the fluorescent probes in the facile CMC measurement of the surfactants.
研究领域:
化学
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材料科学
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分析化学
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胶体科学
✓ 已验证
产品关联
DOI
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
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化学工程
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催化
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纳米技术
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shancai Guo,Qizhong Hu,Xuye Zhang,Jinjun Zhao,Jianyuan Lin,Zhijian Jia,Teng Wang,Haili Wang,Chunjie Bai,Jinghua Chen
The presence of trace tetracycline (TC) in aqueous environments demands sensitive and scalable detection methods, while conventional techniques often suffer from poor selectivity and high detection limits. Herein, a synergistic optimization strategy combining response surface methodology (RSM) and backpropagation (BP) neural network was developed to precisely tailor the localized surface plasmon resonance (LSPR) properties of gold nanorods (AuNRs) for constructing a high-performance surface-enhanced Raman scattering (SERS) platform for TC detection. One-way experiments were used to investigate the effects of individual parameters on AuNR structure, followed by Box-Behnken design to build a composite response value integrating LSPR peak position and absorption intensity ratio, enabling optimization of CTAB, AgNO 3 , AA, and NaBH 4 concentrations. A BP neural network was applied to further enhance parameter prediction accuracy. The optimal synthesis conditions yielded AuNRs with good morphological uniformity and an LSPR peak at 767 nm, confirmed by UV–Vis and TEM. The resulting SERS platform achieved a detection limit of 8.5 × 10 −10 M (S/N = 3) for TC, about six orders of magnitude more sensitive than conventional Raman. In real water samples, recoveries ranged from 91.0 % to 103.0 %, with RSD < 5 %, indicating excellent reproducibility and anti-interference capability. This study demonstrates a generalizable route for precision nanostructure synthesis and offers a reliable platform for ultrasensitive antibiotic detection in complex aqueous matrices, showing strong promise for environmental and food safety monitoring.
研究领域:
纳米技术
·
环境监测
·
分析化学
·
神经网络
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光学传感
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材料科学
✓ 已验证
产品关联
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
·
催化
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
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
·
纳米技术
·
分析化学
·
表面科学
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 19
·9362-9368
·
IF 6.97
Peng-Fei Guo,Xi-Ming Wang,Meng-Meng Wang,Ting Yang,Ming-Li Chen,Jian-Hua Wang
Boron-titanate monolayer nanosheets were prepared through a scalable step by step intercalation approach for anchoring 3-mercaptopropyltriethoxysilane (MPTS) on the surface. MPTS provides clickable sites with 4-vinylphenylboronic acid (VPBA) via a thiol–ene (TE) click reaction to obtain monolayer titanate nanosheets with boronic acid ligands immobilized on the surface. The nanosheets obtained are denoted as VPBA-MPTS-TiNSs, with a lateral dimension of a few dozen nanometers and with a thickness of ca. 3.5 nm. The nanosheets exhibit a superior adsorption capacity of 1669.7 mg g−1 and favorable selectivity for the adsorption of glycoproteins by employing immunoglobulin G (IgG) as the protein model. The adsorbed IgG is thereafter readily collected by using 0.1% (m/v) cetane trimethyl ammonium bromide (CTAB) as the eluent. The practical applications of VPBA-MPTS-TiNSs are further demonstrated by the selective adsorption/purification of IgG from human serum.
研究领域:
材料科学
·
纳米技术
·
生物化学
·
蛋白质纯化
✓ 已验证
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
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 12
·3065-3071
·
IF 5.256
Linzhong Wu,Jiaqi Yu,Lei Chen,Di Yang,Shumin Zhang,Lu Han,Muyang Ban,Le He,Yong Xu,Qiao Zhang
We report a general and fast approach that can transfer any hydrophobic nanocrystals into water within several seconds without vigorous stirring or ultrasonication treatment at room temperature. The key factor is to find a suitable solvent that can be soluble in both organic solvent and water using the classical “like dissolves like” rule. Hydrophobic nanocrystals covered with oleic acid, oleylamine, and TOPO have been successfully transferred into water. The second ligand could be any amphiphilic ligands, such as sodium oleate, decanoate, dopamine, CTAB, and so on. The surface charge could be tuned to negatively or positively charged by using different ligands. After phase transfer, the original properties, including the plasmonic, magnetic, catalytic, and fluorescence properties, of the nanocrystals are well retained.
研究领域:
纳米技术
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）