Energy Technology
·
2025
·
IF 3.6
Ming Yan,Haoyu Chen,Yu Zhu,Yuxiao Deng,Zhuanlong Yan,Ziyi Lu,Yanlin Chen
In this study, NH 2 –SiO 2 @Ti 3 C 2 T x core–shell microspheres with different Ti 3 C 2 T x contents are prepared by coating Ti 3 C 2 T x nanosheets on the surfaces of SiO 2 microspheres using an electrostatic self-assembly method. The structures, elemental compositions, and microscopic morphologies of NH 2 –SiO 2 @Ti 3 C 2 T x microspheres are investigated by X-Ray diffraction, Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy, and X-Ray photoelectron spectroscopy. The results show that Ti 3 C 2 T x nanosheets are uniformly coated on the surfaces of the SiO 2 microspheres, and the surfaces of the SiO 2 microspheres are modified by NH 2 . The maximum specific surface area of NH 2 –SiO 2 @Ti 3 C 2 T x composite doped with 15 wt% Ti 3 C 2 T x is 29.937 m 2 g −1 , with an average pore size of 0.11848 cm 3 g −1 . The electrochemical performance test results show that after 100 cycles at a C rate of 0.2C, the specific capacity of the NH 2 –SiO 2 @Ti 3 C 2 T x anode material increases by 270.1% compared to that of SiO 2 , reaching 142.5 mAh g −1 . Compared with SiO 2 , the NH 2 –SiO 2 @Ti 3 C 2 T x materials have higher electrical conductivities and Li ion diffusion rates, thereby improving their rate performances, and the discharge specific capacities and cycling stability are superior to those of the SiO 2 anode material.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Zeyu Guan,Yajie Shu,Yongwen Ma,Jinquan Wan
A novel core–shell amino-functionalized silica coated nanoscale zero valent iron (NH 2 –SiO 2 @NZVI) was prepared by the combination of liquid phase reducing method and improved Stöber method. The surface, structure and characteristics of the nanoparticles (NPs) were investigated by transmission electron microscope (TEM), scanning electron microscopy (SEM), powder X-ray diffraction (XRD), and the elemental analysis. It was found that the appropriate dropping rate of NaBF 4 and the proper usage of 3-aminopropyl trimethoxysilane (APTMS) were the crucial and key step for the formation of highly uniform and desirable NH 2 –SiO 2 @NZVI particles. SEM, XRD results showed that the obtained NH 2 –SiO 2 @NZVI NPs has a good dispersibility and antioxidant capacity with the particle size around 120 nm, BET surface area around 123.38 m 2 /g when NaBH 4 dropping speed was 1 ml/min and the usage of APTMS was 0.3 ml/ml tetraethyl orthosilicate (TEOS). NH 2 –SiO 2 @NZVI particles can effectively adsorb TCP with the first-order rate constant k obs of 0.0204 h −1 in 18 h and remove with a removal efficiency of 45.62% in 48 h.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
ELECTROANALYSIS
·
2019
·Vol. 32
·期 3
·462-469
·
IF 2.691
Xiaomeng Shan,Tao Pan,Yuting Pan,Wenchang Wang,Xiaohui Chen,Xueling Shan,Zhidong Chen
In this study, a novel electrochemiluminescence (ECL) sensor for highly sensitive and selective detection of Pb(II) was developed based on Ru(bpy) 3 2+ encapsulated UiO66 metal-organic-framework (Ru(bpy) 3 2+ −UiO66 MOF) and −NH 2 group functionalized silica (NH 2 −SiO 2 ). The NH 2 −SiO 2 with large surface area provided an excellent platform for the ECL sensor. As numerous exposed carboxyl groups were present on UiO66 backbone, the Ru(bpy) 3 2+ −UiO66 could be steadily immobilized to NH 2 −SiO 2 by forming amide bonds. Meanwhile, the introduced UiO66 MOF which used for the encapsulation of Ru(bpy) 3 2+ , significantly enhanced the ECL efficiency of the proposed sensor, as it possessed a large specific surface area and porosity for the loading of Ru(bpy) 3 2+ . Moreover, a high quenching effect on ECL intensity was obtained in the presence of Pb(II) in the electrolyte. Under the optimal conditions, the quenched ECL intensity showed a good linear relationship within Pb(II) concentration in the range from 1.0×10 −6 to 1.0×10 2 μM, with a detection limit of 1.0×10 −7 μM ( S / N =3). The proposed sensor for Pb(II) detection was simple in operation, rapid in testing, stable in signal, and showed a good anti-interference ability to some other metal ions. Besides, its application for detecting Pb(II) in a real sample was also investigated here. This work provides a potential platform for metal ions detection in environmental monitoring field.
研究领域:
分析化学
·
环境科学
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DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Shuangli Li,Yu Zhang,Sen Qiao,Jiti Zhou
Although MIL-101(Fe) has a homogeneous distribution of active metal sites, the relatively low stability of its coordination bonds limits its potential for application, especially in harsh environments. Here, a novel lanthanum-doped MIL-101(Fe)-NH 2 @mesoporous SiO 2 yolk-shell (LMFN-YS) material, synthesized by green water-etching, has effectively improved the adsorption capacity and stability of MIL-101(Fe)-NH 2 . Compared to traditional acid-base etching methods, water etching offered a more co-friendly and cost-effective approach to producing yolk-shell structures. Due to the mesoporous protective shell of mesoporous SiO 2 and more exposed active sites, the yolk-shell materials showed a faster adsorption rate (30 min) and a larger uptake capacity (240.0 mg P/g) than those of MIL-101. The material also exhibited broad range of pH stability from 2 to 10 and displayed good cyclic regeneration ability, with a removal efficiency of 75.9 % after three cycles. Additionally, it demonstrated excellent selectivity towards various coexisting anions such as Cl − , NO 3 − , SO 4 2− , CO 3 2− and HCO 3 − at diverse ionic strengths ranging from 0.001 to 1 M. The superior performance of L 1 MFN-YS (yolk-shell materials of La: Fe = 1:1) was attributed to a combination of factors, including ligand exchange between La(Fe)-OH and phosphates, Lewis acid-base interaction and electrostatic attraction. Additionally, high phosphate removal performance was observed in the real petrochemical wastewater (initial concentrations of 5.48 mg P/g) with a residual effluent concentration of 0.05 mg P/L, which was below the A-level standard of phosphate effluent in China (0.5 mg/L). This work provides a green method for preparing yolk-shell materials with improved ability to treat phosphate wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
废水处理
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xiaoxiao Chen,Mengyao Liu,Lijuan Zhang,Yunshan Zhou,Enming Ping,Chunyan Ding
ZIF-67@NH 2 –SiO 2 composites were prepared by loading the metal-organic frameworks ZIF-67 on amino modified SiO 2 gel particles (NH 2 –SiO 2 , 80–100 mesh) through layer-by-layer self-assembly method. Systematic investigation on the effects of ZIF-67 loading amounts on NH 2 –SiO 2 packed stainless steel chromatographic column (specification 1.0 m×2.0 mm I.D.), the flow rate of He as carrier gas and the injection amount of mixed gas (H 2 /D 2 ) on the hydrogen isotope H 2 /D 2 separation performance at liquid nitrogen temperature, unraveled the optimal conditions for H 2 /D 2 isotope separation . The results showed that the optimal stationary phase materials under the optimized conditions can effectively separate H 2 and D 2 with separation resolution R = 1.52 and the separation time t = 10.15 min. The superior performance of the ZIF-67 is tentatively thought to be due to kinetic quantum sieving (pore size 3.3 Å) effect and chemical affinity sieving effect of Co ion in ZIF-67.
研究领域:
分析化学
·
材料科学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Xikun Zhang,Xue Lv,Ting Xie,Yanwen Cheng,Jiajia Zhang,Xiaoyan Xu
In catalytic reactions, achieving large specific surface area immobilisation of the catalyst is an important factor affecting the catalytic effect, however, the primary challenges in utilizing hydrogels as catalyst carriers are to enhance the mechanical properties of the hydrogel to improve the activity and controllability of the catalyst. In this study, a new structure of P(AM-co-AA)/SMA/NH 2 -SiO 2 hydrogels was synthesized via free radical polymerization, and the effects of the content of AA and NH 2 -SiO 2 on the mechanical properties of the hydrogels were investigated. Without the use of additional cross-linking agents, both a chemical cross-linking network and a hydrophobic linkage network were established, which effectively reconstructed the structure of the hydrogels and dissipated energy. As a result, P(AM-co-AA-1.5 %)/SMA/NH 2 -SiO 2 -0.5 % hydrogel exhibited high mechanical properties, with tensile strength, elongation, and toughness reaching 1456 KPa, 4605 %, and 23.59 MJ/m 3 , respectively. This hydrogel can be utilized as a template for in situ and stable Ag NPs. Additionally, P(AM-co-AA)/SMA/NH 2 -SiO 2 @Ag composite hydrogels were prepared using cation exchange and in situ reduction methods for the catalytic reduction of 4-nitrophenol (4-NP). The composite hydrogel exhibited fast catalysis, high efficiency, stable cycling, recyclability and adjustable catalytic activity at 35 °C with K app = 0.811 min −1 . Furthermore, using this composite hydrogel alleviated the need for separating metal nanoparticle catalysts from the reaction system, thereby enabling the development of robust hydrogel materials with controlled catalytic activity for the wastewater treatment industry.
研究领域:
材料科学
·
环境科学
·
催化化学
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Yanan Liu,Shengxi Wu,Qian Liao,Wenqiao Ye,Mingjun Zhang,Lvhong Gong,Haotian Wu,Doudou Xu
A novel electrochemical biosensor was designed for the detection of anti-Mullerian hormone (AMH) based on carboxylic multiwalled carbon nanotubes (CMWCNTs)/NH
2
–SiO
2
nanosphere materials. In our study, cross-linking agents were used to form CMWCNTs/NH
2
–SiO
2
composites. The functionalized anti-Mullerian tube hormone monoclonal antibodies were modified on the surface of the screen-printed electrode (SPE) to verify the response mechanism by the current changes caused by the binding of antigen to the antibody. CMWCNTs/NH
2
–SiO
2
enhances the electrical signal to enable a more robust binding of AMH proteins to the electrode. The electrochemical properties of the CMWCNTs/NH
2
–SiO
2
@AMH/SPE sensor was analyzed through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The experimental results showed that the AMH detection range was wide, which had a linear correlation with AMH concentrations in the range of 1 fg and 100 ng mL-1, and the limit of detection concentration was 0.15 fg mL
-1
. Furthermore, our clinical sample experiments showed excellent AMH detection performance and specificity. The CMWCNTs /NH
2
–SiO
2
biosensor prepared in this paper effectively achieved the exact detection of low concentration AMH protein. It has great potential and application prospect in the clinical stage.
研究领域:
生物医学工程
·
分析化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yicheng Ye,Qiaohong Zhang,Guoying Weng,Zhuwei Zhu,Zhenguo Lyu,Chen Chen
The species and amount of the surface groups are closely related with the catalytic performance for a heterogeneous catalyst. High content of alkylamino (50 mol%) and n -propyl (15 mol%) were simultaneously introduced onto the surface of SiO 2 nanospheres with a one step reverse-phase microemulsion method. Accompanying the formation of plenty of surface nano-bulges, a high ratio (86.5 %) of the silicon species were exposed on the surface of this novel material. Abundant of surface groups including Si-NH 2 (5.5 mmol g −1 ), Si-C 3 H 7 (1.7 mmol g −1 ), and Si-OH (6.1 mmol g −1 ) coexisted on the surface enabled this novel material to be a very efficient catalyst for the Aldol condensation reaction between benzaldehyde and n -heptanal. Higher content of alkylamino supplied more catalytic sites. Proper ratio of silanol-to-alkylamino (a little higher than 1) facilitated the adsorption of the substrate molecules and strengthened the cooperation between alkylamino and silanol. Surface hydrophobic modification with n -propyl further facilitated the adsorption of the substrate molecules at the presence of the byproduct of water. Conversion of 99 % was successfully obtained at a lower temperature (90 °C) and in a very short time of 25 min with the present material being used as the catalyst. In some other Aldol condensation reactions, the present catalyst NH 2 -SiO 2 -C 3 H 7 also showed excellent catalytic performance.
研究领域:
材料化学
·
催化化学
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DOI
高影响因子
International Journal of Low-Carbon Technologies
·
2023
·
IF 2.3
Wang Tingting,Yue Xiaoju,Han Lin,Wang Jinnong,Zhang Yuzhen,Tang Xiaofeng,Wang Shifeng
We reported anchoring mesoporous silica onto the microporous metal–organic frameworks (MOF) (UiO-66-NH2) to obtain a hierarchical porous framework (UiO-66-NH2@SiO2). This strategy maintains the high specific surface area (SA) of the MOF and addresses the mass transfer issue frequently encountered in microporous materials, providing more possibilities for subsequent modified structural frameworks. The structural characteristics of UiO-66-NH2@SiO2 were evaluated by Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, surface analysis and X-ray photoelectron spectroscopy. In this work, the specific SA of the composite material was 196.667 m2/g, which decreased due to the occupation of some pores by anchored silica. Adsorption experiments showed that the composite material had a better adsorption effect (Congo red, 393.83 mg/g; bromophenol blue, 446.46 mg/g) than UiO-66-NH2, with electrostatic interaction and hydrogen bonding being the main driving forces. Therefore, this is a material that has a positive impact on dye adsorption. The strategy proposed in this work has potential applications not only in the construction of new materials but also in the exploration of dye adsorbents.
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DOI
高影响因子
ANALYST
·
2020
·Vol. 145
·期 23
·7616-7622
·
IF 3.978
Jingxian Li,Xueling Shan,Ding Jiang,Yuru Wang,Wenchang Wang,Zhidong Chen
In this work, a solid-state electrochemiluminescence (ECL) sensor based on resonance energy transfer (RET) was proposed using MoS2QDs@g-C3N4 as a donor and NH2-SiO2@PTCA as an acceptor. Herein, MoS2QDs could significantly facilitate the stability and efficiency of the ECL of g-C3N4. PTCA provided a large platform to anchor NH2-SiO2 nanoparticles. The prepared MoS2QDs@g-C3N4 exhibited good spectral overlap with the UV–vis absorption spectrum of NH2-SiO2@PTCA. Based on this, we designed an “off–on” ECL sensing strategy for sensitive and selective detection of glutathione (GSH). Under the best conditions, the linear range of the sensor for GSH detection was from 0.001 to 100 μM with a detection limit of 0.63 nM (S/N = 3). More importantly, GSH in commercial samples can be detected using the proposed sensor, which indicated its superior detection capabilities and potential application value in commercial medicines.
研究领域:
分析化学
·
生物传感
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Maliang Zhang,Linlin Wang,Shuo Yang,Mengen Zhang,Ziang Mu,Yaru Wang,Xi Du,Zhenhuan Li,Bowen Cheng
This study uses polyphenylene sulfide (PPS) fiber paper as a skeletal support to fabricate a high-density, porous nonwoven support layer with excellent mechanical stability via wet papermaking. Sulfonated polyether ether ketone (SPEEK) is then cast onto its surface to form a continuous proton-conducting phase. Building on this foundation, synergistic doping with sulfonated graphene oxide (S-GO) and amino-modified silica (NH 2 –SiO 2 ) constructs a topologically interconnected proton exchange membrane structure exhibiting acid-base synergistic effects. The sulfonic acid groups on the S-GO surface act as high-density proton donors, providing continuous proton conduction sites. Meanwhile, the basic amino groups in NH 2 –SiO 2 form stable acid-base interactions and hydrogen-bond networks with sulfonic acids, effectively anchoring proton migration pathways, reducing disordered swelling, and extending proton hopping distances. This topologically interconnected acid-base synergistic network significantly enhances proton transport dominated by the Grotthuss mechanism while effectively suppressing methanol permeation. Performance testing reveals that the composite membrane with optimized doping ratio achieves proton conductivity up to 0.2 S cm −1 at 80 °C, with methanol permeability significantly lower than commercial Nafion-117 membranes. In direct methanol fuel cell testing, the composite membrane exhibited an open-circuit voltage of approximately 770 mV and a peak power density approaching 170 mW cm −2 , while demonstrating excellent thermal stability, oxidation resistance, and mechanical strength. These results demonstrate that constructing a topologically interconnected structure with synergistic acid-base interactions can effectively balance proton conductivity and fuel barrier performance, providing a viable new strategy for developing high-performance, low-cost proton exchange membrane materials.
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 21
·9702-9708
·
IF 2.7
An-Xu Ma,Cai-Fang Liu,Yu-Lan Zhu,Zong-Hong Luo,Hong-Mei Zhou,Yue Zhang,Bang-Jin Wang,Jun-Hui Zhang,Sheng-Ming Xie,Li-Ming Yuan
In this work, a chiral core–shell microspheres composite, L-his-MIL-53-NH2@SiO2, was prepared through in situ growth and chiral post-modification strategies. The core–shell microspheres were applied as a novel chiral stationary phase for HPLC enantiomeric separation. Various racemates were separated on the L-his-MIL-53-NH2@SiO2 packed column using n-hexane/isopropanol as the mobile phase. The chiral column showed excellent separation efficiency for fourteen chiral compounds, including alcohols, alkanes, esters, phenols, ketones, and organic acids. The influence of injection mass and temperature on the separation performance of the chiral column were investigated. The relative standard deviations (n = 5) of the retention time and peak area by repeated separation of benzoin are 0.28% and 0.63%, respectively. The results show that the L-his-MIL-53-NH2@SiO2 packed column exhibited good reproducibility and stability. In addition, the chiral resolution ability of the L-his-MIL-53-NH2@SiO2 packed column was compared with that of a commercial chiral column (Chiralpak AD-H). The L-his-MIL-53-NH2@SiO2 packed column exhibits unique advantages in chiral separations that can be complementary to the commercial chiral column. It was demonstrated that the chiral core–shell microspheres composite L-his-MIL-53-NH2@SiO2 prepared based on in situ growth and chiral post-modification strategies has great potential for enantiomeric separation by HPLC.
研究领域:
分析化学
·
材料科学
·
色谱技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）