Journal of Cleaner Production
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2021
·
IF 9.297
Xinyu Zhang,Jing Tian,Peipei Wang,Tian Liu,Mehraj Ahmad,Tingwei Zhang,Jiaqi Guo,Huining Xiao,Junlong Song
Biochar has very low adsorption capacity to anionic dyes due to negative charge on the surface. Herein, a dual-templating strategy by mild activators (K 2 C 2 O 4 ·H 2 O and CaCO 3 ) was applied for synthesis of soybean cake nitrogen self-doped biochar (NSB) to enhance the adsorption capacity for dyes. The results of element analysis showed NSB had N contents of 3.51%. Its specific surface area was 2413.00 m 2 g −1 and maximum adsorption amount of Rhodamine B and Congo Red reached up to 839.97 mg g −1 and 882.64 mg g −1 , respectively. The NSB retained high adsorption capacity after 5 cycles. By linear fitting of full Van't Hoff equation , lower enthalpy value shown in Congo Red adsorption in comparison with Rhodamine B adsorption, indicated the efficient anionic dye removal by NSB. Negative heat capacity change value indicated water molecules adsorbed on the NSB surface were replaced by dyes molecules. This paper provides a framework to prepare excellent NSB for the efficient removal of dyes from wastewater and shed lights on the mechanism of how NSB work for respective cationic and anionic dye from thermodynamics.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 94
·期 1
·186-194
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IF 1.986
Wang Qiuhua,Wang Huiying,Wu Yaling,Cheng Lingping,Zhu Lunan,Zhu Junchen,Li Zhidong,Ke Yanxiong
Sub 2-μm monodisperse mesoporous silica spheres (MMSS) were synthesized using a mixed template system in a MeOH/H 2 O solution. 1-Dodecylamine (DDA) and polymeric type Jeffamine surfactants, including D2000, D4000, and T5000, were employed as templates. These mixed template syntheses realized to gain MMSS materials with good spherical shape and uniform particle size. When the MeOH/H 2 O (v/v) ratio was controlled between 2.5:1 and 3.0:1, mesoporous silica spheres of 2.10–2.35 μm with excellent dispersibility can be obtained. Depending on the surfactant chain length of Jeffamine, hydrothermal aging pH (4–9), time (12–24 h), and temperature (80–140 °C), MMSS with large-pore sizes (up to 14.3 nm), surface areas (153–791 m 2 /g), and pore volumes (0.47–1.28 cm 3 /g) can be synthesized.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 22
·14183-14189
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IF 4.036
Yuekun Li,Duozheng Ma,Wenhua Fu,Chuang Liu,Yu Wang,Zhendong Wang,Weimin Yang
The synthesis of zeolites with nanosheet morphology has been attracting extensive attention. Despite the steady progress, the direct synthesis of ultrathin nanosheets of FER zeolite with thickness of less than 10 nm is still a great challenge. Herein we report a facile synthesis of FER zeolite nanosheets (named SCM-37) by using octyltrimethylammonium chloride (OTMAC) and 4-dimethylaminopyridine (4-DMAP) as dual organic templates. The effects of synthesis parameters, including initial molar ratio of SiO2/Al2O3, crystallization temperature and time were investigated. It turned out that the crystallization field of SCM-37 was narrow. A two-step crystallization method was utilized to obtain pure and completely crystallized SCM-37 zeolite. SCM-37 was characterized by multiple techniques, including X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen physisorption, Fourier transform infrared (FTIR), ammonia-temperature programmed desorption (NH3-TPD) and nuclear magnetic resonance (NMR), and compared with the conventional FER zeolite (C-FER). The two most significant features of SCM-37 are the ultrathin crystal nanosheet and extremely high external surface area. The thickness of SCM-37 along the a-axis is 4∼7 nm, while that of C-FER is over 20 nm. The external surface area reaches 198 m2 g−1, which is over ten times larger than that of C-FER. The catalytic performances of the FER zeolites were evaluated by the cracking of 1,3,5-triisopropylbenzene (TiPB). Although possessing a lower amount of total acid sites, SCM-37 showed higher conversion of TiPB, as well as selectivity to the deep cracking products. The superior performance of SCM-37 was attributed to the higher external surface area arising from the ultrathin nanosheets.
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
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2017
·Vol. 46
·期 44
·15541-15548
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IF 4.029
Ning Sui,Ke Wang,Xinyao Shan,Qiang Bai,Lina Wang,Hailian Xiao,Manhong Liu,Vicki L. Colvin,William W. Yu
Hollow dendritic Ag/Pt alloy nanoparticles were synthesized by a double template method: Ag nanoparticles as the hard template to obtain hollow spheres by a galvanic replacement reaction between PtCl62− and metallic Ag and surfactant micelles (Brij58) as the soft template to generate porous dendrites. The formation of a Ag/Pt alloy phase was confirmed by XRD and HRTEM. Elemental mapping and line scanning revealed the formation of the hollow architecture. We studied the effects of the Ag/Pt ratio, surfactant and reaction temperature on the morphology. In addition, we explored the formation process of hollow dendritic Ag/Pt nanoparticles by tracking the morphologies of the nanostructures formed at different stages. In order to improve the electrocatalytic property, we controlled the size of the nanoparticles and the thickness of the shell by adjusting the amount of the precursor. We found that these Ag/Pt alloy nanoparticles exhibited high activity (440 mA mg−1) and stability as an electrocatalyst for catalyzing methanol oxidation.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 8
·4744-4750
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IF 12.732
Shengqi Wang,Songliang Liu,Ziqiang Wang,Zechuan Dai,Hongjie Yu,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Mesoporous noble metal-based nanoarchitectures with large cavities and accessible active surfaces have been demonstrated as effective catalysts in electrocatalysis fields, but mesoporous rhodium nanotubes have hardly been reported due to the difficulty in regulating the discrepancy between the reduction rate and micelle assembly rate. Herein, we present a simple dual-template strategy for in situ fabrication of one-dimensional rhodium mesoporous nanotubes (Rh MNTs), in which the obtained Ni nanowires and diblock copolymer micelles facilitate the evolution of tubular interiors and mesoporous exteriors, respectively. The well-developed hollow mesoporous structure can not only provide sufficient active centers and facilitated channels, but can also prevent catalyst aggregation. Therefore, the generated Rh MNTs exhibit excellent activity, favorable kinetics and high durability for the methanol oxidation reaction, which are superior to those of traditional commercial Pt black. This work sheds light on the fabrication of one-dimensional metallic mesoporous nanotube structures for extensive electrocatalytic applications.
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
Nanoscale
·
2024
·
IF 5.8
Caicheng Song,Yiwen Guo,Tianwei Wang,Kun Liu,Pin-Yi Zhao,Ying Liu,He Huang,Rongwen Lu,Shufen Zhang
Functional mesoporous carbon nanomaterials with large pores and small particle sizes have broad accessibility, but remain challenging to achieve. This study proposed a dual-template synergistic assembly strategy to facilely synthesize extra-small nitrogen-doped mesoporous carbon nanospheres with large pores in a low-cost manner. Directed by the synergistic effect of the combination of surfactants, sodium oleate (anionic surfactant) and triblock copolymer-P123 (nonionic surfactant) were selected as templates to construct nanomicelles (nanoemulsions), which were co-assembled with melamine-based oligomers to form composite nanomicelles, thus obtaining nitrogen-doped mesoporous polymer nanospheres (NMePS) and then nitrogen-doped mesoporous carbon nanospheres (NMeCS). Based on Schiff base chemistry, the melamine-based oligomers with self-assembly capability were synthesized as precursors, which is different from the conventional synthetic route of melamine–formaldehyde resin. The key parameters involved in the route were investigated comprehensively and correlated with the characterization results. Furthermore, the 50 nm-scale particle size and the large mesoporous size of 5.5 nm of NMeCS can facilitate effective mass transport, coupled with their high nitrogen content (15.7 wt%), contributing to their excellent performance in lithium-ion batteries.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Chunsheng Xie,Xiangjin Huang,Shoulian Wei,Chun Xiao,Jiangfei Cao,Zhenxing Wang
An environmentally friendly dual-template magnetic ion imprinted polymer (DMIIP) of Cd 2+ and Pb 2+ were prepared by surface imprinting technique combined with a sol-gel process using Cd 2+ and Pb 2+ as dual-templates, papain as a functional monomer and magnetic mesoporous Fe 3 O 4 @mSiO 2 as substrate. The Polymer was characterized using scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and adsorption experiments. Maximum adsorption capacities of DMIIP were 41.69 for Cd 2+ and 76.39 mg/g for Pb 2+ in a mixed solution. We also studied factors affecting adsorption and desorption of Cd 2+ and Pb 2+ . DMIIP clearly demonstrates a stronger ability than dual-template magnetic none-ion imprinted polymer (DMNIP) to selectively adsorb Cd 2+ and Pb 2+ from solutions containing other metal ions . Absorption by DMIIP was well fitted with a pseudo-second-order kinetic model . After eight adsorption-desorption cycles, adsorption capacity of DMIIP relative to Cd 2+ and Pb 2+ decreased 6.1% and 6.3%, respectively. The developed MISPE-GFAA method using DMIIP as adsorbent was satisfied to Cd 2+ and Pb 2+ determination in soil and food samples. The polymer could be a green and promising adsorbent to remove Cd 2+ and Pb 2+ from soil and food samples.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Lu Han,Xueyan Liu,Jingtao He,Chengyou Kan
Hollow organosilica microspheres (HOMs) possess distinctive properties and are promising in various fields. However, research on micron-sized uniform functional HOMs is limited. Herein, micron-sized monodisperse thiol-functionalized HOMs (HOMs-SH) were fabricated via a dual-templating strategy. The hard and soft templates used in the preparation of HOMs-SH were micron-sized SiO 2 microspheres prepared through a modified Stöber method and hexadecyltrimethylammonium bromide (CTAB), respectively. The precursors were 1,2-bis(triethoxysilyl)ethane (BTEE) and (3-mercaptopropyl)trimethoxysilane (MPTMS), and the etchant was Na 2 CO 3 . This strategy was simple, controllable, mild, and eco-friendly. The morphology, chemical composition, pore structure, thermal stability, and mechanical properties were characterized by TEM, SEM, FTIR, Raman, solid-state 29 Si NMR, XPS, BET, XRD, TGA, and AFM. Results revealed that the micron-sized monodisperse HOMs-SH exhibited hollow structures with a core cavity and thin shell with micropores (1.95 nm) and mesopores (2.95 nm). They had the merits of easy separation and thiol groups concentrated on the surface. BET specific surface area reached 342 m 2 /g, enhancing the availability of thiol sites. The formation of shells and morphology of HOMs-SH were influenced by formula and process conditions in the step of coating organosilica onto the templates, including the size of templates, temperature, dosages of CTAB and precursors, and MPTMS/BTEE ratio. The shell thickness (43–140 nm) and diameter (1149–3205 nm) of HOMs-SH were controllable. This article provides new insights into the design of micron-sized functional hollow microspheres with expected structures and properties for diverse applications, and contributes to the understanding and optimization of coating organosilica shells onto other micron-sized templates.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Hugang Zhang,Songliang Liu,Pengjun Tian,Yanhao Mao,You Xu,Hongjing Wang,Xiaonian Li,Ziqiang Wang,Liang Wang
The development of efficient and stable electrocatalysts for hydrogen evolution reaction (HER) is essential for sustainable production of hydrogen, while it is still a tremendous challenge. In this study, we demonstrate a dual-template approach to constructing one-dimensional mesoporous RhTe nanowires (m-RhTe NWs) as a pH-universal HER electrocatalyst. Benefiting from abundant active sites, reduced hydrogen binding energy on Rh, and improved charge delivery capacities, the m-RhTe NWs exhibit excellent HER activities compared with commercial Pt/C, which requires an overpotential of 28, 29, and 49 mV to achieve a current density of 10 mA cm −2 in 0.5 M H 2 SO 4 , 1.0 M KOH, and 1.0 M phosphate-buffered saline, respectively, as well as benign stability. Meanwhile, the Faradic efficiency of as-developed m-RhTe NWs is 97% for H 2 production in a full pH range. The present work could provide a material design for the development of 1D Rh-based materials with advanced performance in the HER and other energy catalysis.
研究领域:
材料科学
·
电催化
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2017
·Vol. 28
·期 1
·295-307
·
IF 1.577
Wei Mei-hua,Wang Shu,Jiang Wan-ying,Chen Hong-yan,Wang Yi,Meng Tao
In this study, the dual-template molecularly imprinted composite membrane (D-MIM) was synthesized using ferulic acid and cinnamic acid as the mixed templates, α-methacrylic acid as functional monomer, ethylene glycol dimethacrylate as crosslinker, 2,2-azobisisobutyronitrile as photoinitiator inducing polymerization reaction, furthermore blended nanoparticles so as to improve mechanical strength and pure water flux of membrane. This paper has researched that the effect of variety of nanoparticles and its quantity, the quantity of photoinitiator, total template–functional monomer (T/F) ratio on performance of prepared membrane. The study has founded optimum parameters of synthesis: nanoparticles 18 nm TiO 2 of 1 wt%, photoinitiator of 0.3 g, T/F ratio is 1:3. Under the above conditions, D-MIM would present a high separation efficiency of template molecules (ferulic acid and cinnamic acid) and the analogues (caffeic acid and syringic acid) with the permeation rate of about 100%. However, the permeation rate of glucose which has an analogous formula weight and extremely different structure is about 60%. From the foregoing, it showed that the D-MIM has specific selectively to the template molecules and its analogues, but the substances which have obvious distinctions in structure would present low permeation rate. It can be seen that D-MIM can identify the same kind of substance with specificity. Therefore, it can be used in the enrichment and separation of some active ingredients of traditional Chinese medicine, the detection of toxic substances in food and so on. Finally, the scanning electron microscope and FT-IR spectrometer has been used to visualize the structure morphology of the prepared membrane and to quantity the surface characteristics.
研究领域:
材料科学
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生物化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhongjie He,Xiaoqian Li,Hongni Wang,Fangfang Su,Dechao Wang,Dongdong Yao,Yaping Zheng
The performance of graphene aerogels (GAs) is based on the microstructure. However, GAs face a challenge of simultaneously controlling the size and alignment of pores strategically. Herein, we initially proposed a simple strategy to construct GAs with an adjustable structure based on the emulsion and ice dual template methods. Specifically, GAs with a honeycomb structure prepared by conventional freezing (CGAs) exhibited a high specific surface of 176 m2/g, superelasticity with a compressive strain of 95%, isotropic compression and thermal insulation performances, as well as an excellent absorption capacity of 150–550 g/g. Instead, the GAs with a bamboo-like network frozen by unidirectional freezing (UGAs) showed anisotropy in compression and thermal insulation behavior. Furthermore, UGAs exhibited incredible special stress (7.9 kPa cm3/mg) along the axial direction twice than that of the radial direction. Meanwhile, the apparent temperature of UGAs was only 45.6 °C when placed on a 120 °C hot stage along the radial direction. Remarkably, the properties of CGAs and UGAs were significantly improved with the adjustment of the microstructure.
研究领域:
材料科学
·
纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Hui Li,Yanxia Cheng,Feize Li,Hairong Wang,Renwei Qing,Tu Lan,Yuanyou Yang,Jijun Yang,Jiali Liao,Ning Liu
Biochar as an adsorbent is paid more attention for treating uranium-containing wastewater. In this work, a novel microalgae-derived biochar(A-HTC) was synthesized by dual-template one-step carbonization for uranium adsorption. This biochar exhibited a maximum adsorption capacity of 472.3 mg·g −1 . Especially, A-HTC demonstrated excellent selectivity for uranium over 11 competing cations and remarkable reusability after 10 adsorption–desorption cycles. The adsorption behavior with time and uranium concentration followed the pseudo-second-order kinetic model and the Langmuir isotherm model, respectively. Moreover, the adsorption process was spontaneous and endothermic. Zeta potential, XPS, and FTIR analyses revealed that A-HTC adsorbs U(VI) mainly through electrostatic attraction and complexation. The present study offers an innovative adsorbent and a novel method to produce biochar for uranium recovery from aquatic environments.
研究领域:
环境科学
·
材料科学
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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）