Journal of the Taiwan Institute of Chemical Engineers
·
2015
·
IF 3
Zhuoxing Wang,Jiang Xu,Yunjun Hu,Heng Zhao,Junliang Zhou,Yu Liu,Zimo Lou,Xinhua Xu
A selective adsorbent for Hg(II) was prepared by coating Fe 3 O 4 nanoparticles with SiO 2 which was further functionalized with thiol (–SH) group. The new adsorbent (Fe 3 O 4 @SiO 2 -SH) was shown to adsorb aqueous Hg(II) species in a wide range of pH (1.0–8.0) conditions. The Hg(II) adsorption capacity q e was more than 90.0 mg g −1 at pH > 3.0, and was slightly decreased to 84.6 mg g −1 under strong acidic conditions due to the electrostatic repulsion. The Langmuir isotherm model fitted the adsorption data better than the Freundlich, Temkin, and Dubinin-Radushkevich isotherms models. The maximum adsorption capacity of Fe 3 O 4 @SiO 2 -SH for Hg(II) was 132.0 mg g −1 . The adsorption kinetics were shown to follow the pseudo-second-order kinetic model, and the kinetic constant k 2 was 2.4 × 10 −3 g mg −1 min −1 . The magnetic retrieve of the newly-developed adsorbent was easily carried out via an external magnetic field, enabling both excellent adsorbent utilization and adsorption efficiency at high Hg(II) concentrations.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Ping Yu,Zemin He,Yuzhen Zhao,Wenqi Song,Zongcheng Miao
Smart windows with controllable visible transmittance and high near-infrared (NIR) shielding properties have heightened demands for applications in buildings. Herein, we present a hybrid composite film that can control the visible transmittance and shield NIR light via incorporating Cs x WO 3 /SiO 2 -SH nanoparticles into normal polymer-dispersed liquid crystals (PDLCs) film. The surface-modified SiO 2 -SH helps not only to prevent the aggregation of Cs x WO 3 nanoparticles in polar solvent, but also to maintain the well-dispersibility of Cs x WO 3 /SiO 2 -SH nanoparticles in the prepared film. The results indicated that the samples doped with Cs x WO 3 /SiO 2 -SH nanoparticles exhibited more dramatic electro-optical performance regulation effect than the samples doped with Cs x WO 3 nanoparticles due to the synergistic effect of the enlarged void and the woken anchoring forces. The optical transmittance suggested that the sample containing 7 wt% Cs x WO 3 /SiO 2 -SH nanoparticles can control the transmittance between 0.5 % and 71.2 % in the visible light, and shield more than 75 % NIR radiation. In the outdoor experiment, the temperature difference between two model houses consistently around 7 °C after 2 min exposure to the sun under the experimental conditions, suggesting the outstanding thermal management ability of the as-made film. The work could open new doors for the development of energy-saving smart windows in architecture and vehicle glass.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
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IF 3.9
Dongxia Zhang,Juntao Zeng,Shengtao Zhu,Hao Ma,Xiaoxi Kang,Li Lou,Zemin He
In this work, two silicon nanomaterials are doped into polymer/liquid crystal composites by a facile method. SEM and FT-IR characterizations indicate that SiO 2 -SH and synthesized thiol polyhedral oligomeric silsesquioxane (POSS-SH) have been successfully implanted into PDLCs successfully. The electro-optical tests imply that the electro-optical performance of PDLC films can be greatly enhanced by doping proper amounts of SiO 2 -SH nanoparticles and nanostructured POSS-SH into the polymer matrix . The driving voltage can be reduced by nearly 78.2% if the concentration of SiO 2 -SH is 4 wt%; whereas only nearly 60% driving voltage is reduced when 4 wt% POSS-SH is doped into system, indicating better electric-optical performance regulation effect of SiO 2 . The lower driving voltage of SiO 2 -SH doped PDLC samples may be due to the existence of high content –SH on the surface of nanoparticles, which can conduct click reactions with acrylate bond under the effect of initiator.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2023
·
IF 2.2
Zemin He,Ping Yu,Xiaoxi Kang,Hao Ma,Jianjing Gao,Yuan Ge,Wenqi Song,Zongcheng Miao
In this work, electro-optical properties of polymer-dispersed liquid crystals (PDLCs) were enhanced by introducing two silicon nanomaterials into the system. Scanning electron microscopy measurements demonstrated the successful implantation of SiO2 and SiO2-SH nanostructures into the polymer matrix, and the size of a polymer mesh was enlarged with the increasing content of the two silicon nanomaterials. The electro-optical tests indicated that the electro-optical performance of PDLC composites was greatly enhanced by doping proper amounts of SiO2-SH and SiO2 nanoparticles. The driving voltage can be reduced by nearly 73.6% when the SiO2-SH concentration is 8 wt.%, which is much lower than that of SiO2. The lower driving voltage of SiO2-SH-embedded PDLCs was ascribed to the existence of -SH on the surface of the nanoparticles, which can conduct click reactions with acrylate group under the effect of initiator.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Shanshan Feng,Jingwei Liu,Jingshuai Gao,Wenhao Jia,Hao Fang,Na Li,Lu Yang,Yao Lu,Sheng Feng,Shouzhu Li
Solar interfacial distillation has emerged as a widely recognized method for producing clean water due to its environmentally friendly and energy-efficient attributes. Nevertheless, the presence of semi-volatile organic compounds (s-VOCs) in wastewater can significantly compromise the quality of the purified water. This study presents the preparation of multifunctional fiber evaporators (CuFC/SiO 2 -SH NFs) by growing copper ferrocyanide (CuFC) on the surface of shell-belt-shaped thiol-functionalized SiO 2 nanofibers (SiO 2 -SH NFs). The CuFC particle layer functions both as a photothermal component and as a heterogeneous Photo-Fenton catalyst, facilitating the in-situ degradation of s-VOCs during photothermal evaporation. The composite nanofibers demonstrated a solar-to-vapor conversion efficiency of 84.90 % under 4-sun illumination. Furthermore, they achieved a degradation efficiency exceeding 99 % for low-concentration nitrobenzene (NB) solutions (0 ∼ 1 mg/L). This study underscores the potential of CuFC/SiO 2 -SH NFs as an effective material for solar water purification and offers valuable insights into optimizing the Photo-Fenton reaction for environmental applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2018
·Vol. 7
·期 1
·122-130
·
IF 3.175
Shi Wang,Hao Xu,Ailian Wang,Xu Liu,Jie Chen,Zhinan Wang,Di Feng,Qinghui Zeng,Liaoyun Zhang
An inorganic-polymeric hybrid all-solid-state electrolyte (SSE) composed of chemically modified nano-silica, linear poly(trifluoroethyl methacrylate)-co-poly(poly(ethylene glycol) methyl ether methacrylate copolymer (PTFEMA-co-PPEGMA or LCP) and lithium salt is prepared and used in lithium-ion batteries (LIBs) for the first time. Nano-silica is transformed to SiO 2 -SH via esterification reaction. Then, SiO 2 -PEGMA is synthesized through click chemistry of SiO 2 -SH and PEGMA. The compatibility of the nano-SiO 2 and the LCP can be effectively improved due to the excellent dispersibility of the chemically modified nano-SiO 2 in the polymer matrix. As a result, the hybrid SSE has good thermal stability, excellent film-forming ability. Furthermore, the hybrid SSE shows superior comprehensive electrochemical properties, which makes the corresponding LiFePO 4 /Li cells have good cycling performance (the discharge capacity reaches 144 mAh g −1 at 0.3 C) and rate capability (90 mAh g −1 is reached at 1 C). Thus, the hybrid electrolyte can be a powerful SSE for high-safety and high-performance LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）