CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Chang Chen,Bao Xu,Huan Wang,Shaowu Jiu,Yanxin Chen,Yan Liu
Phase change materials offer potential for improving building energy efficiency through heat absorption/release during phase transition. This study develops novel inorganic hydrated salt@SiO 2 phase change microcapsules using modified eutectic hydrated salt as the core and a dual-component silica/nanosilica shell via the Pickering emulsion method. These microcapsules were incorporated into gypsum for forming functional composites. Comprehensive investigations were conducted to evaluate the thermal properties of the modified eutectic hydrated salts and the microcapsules, alongside the mechanical properties and thermal management capabilities of the composites. Optimized microcapsule properties: The optimized microcapsules exhibited a rough surface, an average size of 6.3 μm, a phase-change temperature of 21.31°C, and an enthalpy of 286.8 J/g. Remarkably, the enthalpy loss was limited to 0.4 % after 120 heating-cooling cycles. Composite performance: In the gypsum composites, 7-day compressive and flexural strengths peaked at 10.8 MPa and 5.3 MPa (2.0 wt% microcapsules), declining to 6.6 MPa and 3.5 MPa at 4.0 wt%. Infrared thermography confirmed effective thermal buffering: incorporating 4.0 wt% microcapsules reduced surface temperature by 4°C versus the control specimen after 480 s heating. Concurrently, thermal conductivity decreased by 32.8 % (measured at 4.0 wt% content), further enhancing potential for building thermal regulation. By delaying heat transfer through diurnal phase-change cycles, they directly reduce cooling loads in hot climates, enabling significant annual energy savings in air-conditioned buildings and advancing sustainable construction.
研究领域:
材料科学
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化学工程
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建筑材料
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热能工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Zhiang Hou,Jiangfeng Chu,Cong Liu,Jinnan Wang,Aimin Li,Tong Lin,Corvini Philippe François-Xavier
Photocatalytic denitrification has attracted great attention owing to its high efficiency and environmentally friendly features. However, selectively photocatalytic reduction of high concentration nitrate to N 2 is still a challenging problem due to the competition of photons between nitrate and photocatalysts. Herein, the Ag/SiO 2 core encapsulated in the crystalline TiO 2 shell (Ag/SiO 2 @ c TiO 2 ) was constructed for improvement of photocatalytic denitrification. Finite difference time domain (FDTD) simulation demonstrated that strong light scattering improved light harvesting via optical confinement. Meanwhile, surface plasmon resonance and electron sink effect of Ag not only enhanced the photogenerated electrons density but also promoted charge carriers separation of Ag/SiO 2 @ c TiO 2 . More importantly, e cb − of TiO 2 -shell could be immediately transferred to Ag to keep the balance between Ag 0 and Ag + , which contributed to the good stability of Ag/SiO 2 @ c TiO 2 . 95.8% nitrate ( C 0 = 2000 mg/L) was removed by 5 wt%Ag/SiO 2 @ c TiO 2 with N 2 selectivity of 93.6% within 4 h. Even after five cycles, 5 wt%Ag/SiO 2 @ c TiO 2 still remained high photocatalytic denitrification efficiency (92.2%). Notably, since TiO 2 -shell prevented the reaction between Ag and Cl − , more than 92% nitrate could be removed within 5.3 h in the presence of high concentration Cl − .
研究领域:
环境科学
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材料科学
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化学工程
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催化
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2025
·Vol. 15
·期 11
·8111-8120
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IF 4.6
Hao Zhang,Weihao Ma,Chunyu Qiang,Jiayuan Nie,Ling Ma,Yawei Zhang,Ke Wang
In our research, an emerging magnetic covalent organic framework (Fe3O4@SiO2–BD–DADB-COF) was formulated through Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), etc. Several parameters affecting the extraction process were refined. Accordingly, a novel method of determining 15 macrolides (MALs) in honey and water was established through the Fe3O4@SiO2–BD–DADB-COF as a magnetic solid-phase extraction (MSPE) adsorbent and ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). In consequence, the standard curves for the 15 MALs exhibited an exceptional linearity from 0.1 to 200 μg L−1, and the correlation coefficients (R2) varied from 0.9990 to 0.9999. The recoveries fell between 70.01% and 115.56%, with the relative standard deviations (RSDs) being below 9.93% (n = 5). The detection limits reached 0.001–0.075 μg L−1 with the quantification limits being 0.004–0.228 μg L−1. Ultimately, the method was excellently applied to the analysis of MALs in honey and water.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2020
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IF 4.3
Xiunan Cai,Qingwen Huang,Zongxian Hong,Yanjuan Zhang,Huayu Hu,Zuqiang Huang,Jing Liang,Yuben Qin
To harmlessly treat and effectively utilize manganese residue (MR), a novel MR-based catalyst, mechanical activation (MA)-pretreated MR-derived Fe-Cu@SiO 2 /starch-derived carbon (MAMR-Fe-Cu@SiO 2 /SC) composite, was prepared through a facial method by reduction roasting of MA-pretreated precursors. The prepared catalysts were systematically characterized to explore the formation and catalytic activities. The results showed that the formation of CuFeO 2 anchored on the MR could be ascribed to the close contact and mutual diffusion between solid components caused by MA, and the higher specific surface area, strong interaction of Fe-Cu and more accessible reactive sites of MAMR-Fe-Cu@SiO 2 /SC contributed to the greater catalytic activity in photo-Fenton system for tetracycline (TC) degradation. The MAMR-Fe-Cu@SiO 2 /SC catalyst showed excellent degradation efficiency at pH range of 2.5–9.5, and about 100% TC removal in 40 min and 85.6% TOC removal in 120 min could be obtained. The MAMR-Fe-Cu@SiO 2 /SC exhibited the highest apparent reaction rate constant of 0.066 min –1 , being about 4.0, 2.8, and 2.2 times that for the catalyst of Cu/SC, MAMR-Fe 3 O 4 @SiO 2 /SC and MR-Fe-Cu@SiO 2 /SC, respectively. This enhancement could be attributed to that anchored Cu could accelerate the charge transfer, and short the reaction pathway between photo and Fenton reaction. XPS results showed that the presence of Fe 2+ -Fe 3+ , Mn 2+ -Mn 3+ and Cu + -Cu 2+ cycles were responsible for the radical generation on the surface of the catalyst. This environmentally-friendly method for the preparation of composite catalysts may provide new insights for harmless fixed treatment and valorization of MR and large-scale production of catalyst.
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
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
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2024
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IF 3.6
Jianhao Cheng,Chen Shi,Yubing Dong,Jian Han
Ultraviolet (UV) radiation has a detrimental effect on the outdoor lifetime of PVC film materials. TiO2 nanoparticles, as commonly used UV absorbers, still suffer from poor transparency, high photocatalytic effect, and poor dispersion in PVC matrix. To mitigate these effects effectively, titanium dioxide nanorod @ silicon dioxide (TNr@SiO2) was synthesized and used as an anti-UV aging agent for polyvinyl chloride (PVC). The agglomeration effects of TiO2 nanoparticles in PVC films were solved by synthesizing TNr, and the catalytic effects of TiO2 was reduced by growing SiO2 on the TNr surface. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and UV-visible spectroscopy were utilized to demonstrate the excellent dispersion and low photocatalytic effects of the synthesized TNr@SiO2. Compared with pure PVC film, the color change of TNr@SiO2/PVC composite film is not evident after 800h of UV aging, and the retention of mechanical properties were 93.94%. Compared with TiO2/PVC, TNr@SiO2/PVC composite film has better transparency. Results show that TNr@SiO2 can maintain the properties of PVC better because the electrons of TNr@SiO2 are excited to form a positively charged hole after the absorption of UV light, and then the hole electron pairs are recombined and converted into thermal energy, which improves the durability of PVC. Therefore, this highly transparent TNr@SiO2/PVC composite film with low photocatalytic activity and high UV resistance will soon be applied in large-scale industrial production.
研究领域:
材料科学
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高分子科学
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纳米技术
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化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Bing Xie,Tongtong Wang,Jinxia Cai,Qiuyu Zheng,Zhiyong Liu,Kun Guo,Pu Mao,Haibo Zhang,Shenglin Jiang
Polymer-based nanocomposites embedded high dielectric-constant (high- ε r ) ceramic fillers in high breakdown-strength (high- E b ) polymer matrix are extensively studied as the flexible dielectrics for high discharged-energy–density (high- U e ) film capacitors. Ferroelectric ceramics composition lying on the morphotropic phase boundary (MPB) show ultrahigh dielectric and polarization response, which as ceramic fillers, have great promise to enhance the U e of polymer/ceramic composites. Herein, high- ε r Pb(Zr 0.52 Ti 0.48 )O 3 (PZT) nanocubes (NCs) with MPB composition are prepared successfully via an improved hydrothermal reaction. Based on this, core–shell structured PZT@SiO 2 nanofillers are designed to reduce the uneven electric field distribution and leakage current in P(VDF-CTFE)-based nanocomposites for high E b . We demonstrate that the PZT@SiO 2 nanofillers with MPB composition can effectively resolve the paradox between ε r and E b . The prepared P(VDF-CTFE)/PZT@SiO 2 nanocomposites can display a high U e of 16.8 J/cm 3 at E b of 491 MV/m, which is substantially improved by 107% over the pristine P(VDF-CTFE). Plus, high discharging efficiency of 70% is also achieved. The superiority of the PZT@SiO 2 NCs with MPB in improving the capacitive energy density of film capacitors will be expected to provide a design paradigm for advanced polymer composites with high energy storage performance.
研究领域:
材料科学
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能量存储
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介电与绝缘材料
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纳米复合材料
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铁电材料
✓ 已验证
DOI
高影响因子
ANALYST
·
2020
·Vol. 146
·期 4
·1295-1302
·
IF 3.978
Defen Feng,Fucun Wei,Yeyu Wu,Xuecai Tan,Fang Li,Yongkuai Lu,Gaochao Fan,Heyou Han
An ultrasensitive electrochemiluminescence (ECL) biosensor was developed based on MIL-53(Al)@CdS QDs and SiO2@AuNPs for trichlorfon detection. Metal–organic frameworks (MOFs) were used as a loading platform that provided a large surface area to load targets and modified materials onto the electrode. At the same time, SiO2@AuNPs loaded plenty of AuNPs which effectively increased the ECL resonance energy transfer between the CdS QDs, so that the ECL signal was strongly quenched and resulted in an amplified response. In the range of 10−11–10−4 M, the ECL response showed a linear relationship with the concentration (logarithm) of trichlorfon, and the detection limit was 5.1 × 10−12 M (S/N = 3). When the biosensor was applied to detect trichlorfon in lettuce, broccoli, cucumber, and chives, the recoveries obtained from the spiked samples were 97%–105%, 102%–104%, 100%–104%, and 98%–104%, respectively. Thus, this novel ECL biosensor has potential applications for the analysis of trichlorfon in food samples.
研究领域:
分析化学
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环境科学
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材料科学
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食品安全
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
·
IF 6.361
Xiao-Qiong Wu,Zai-Dong Shao,Qing Liu,Zongli Xie,Fei Zhao,Yu-Ming Zheng
Semiconductor photocatalysis has long been considered as a promising approach for remediation of polluted water. However, the high recombination rate of electrons and holes, as well as a low reaction rate, have impeded its large-scale applications. Therefore, it is of great importance to develop appropriate photocatalysts for promoting its practical application. In this study, a novel TiO 2 /SiO 2 /carbon electrospun nanofiber mat (TSC NFM) with flexibility and porous hierarchy has been successfully designed and fabricated by a facile method of electrospinning and carbonization . Characterization results show that the TSC NFM consists of closely-packed and well-distributed anatase (TiO 2 ) nanocrystals , amorphous SiO 2 nanoparticles , and carbon with interconnected meso - and macro -pores. The photocatalytic performance of the TSC NFM was evaluated by degrading rhodamine B and 4-nitrophenol in batch systems. The results show that TSC NFM exhibits a higher photocatalytic activity than TiO 2 /SiO 2 nanofiber mat, which does not contain carbon. The enhanced performance of the TSC NFM can be attributed to the improved adsorption capacity toward the organic pollutants due to the presence of carbon and to the enhanced interfacial charge separation between TiO 2 nanoparticles and carbon. Besides, the as-prepared TSC NFM displays good stability and reusability. Notably, the flexible TSC NFM can be used in a continuous-flow reactor to efficiently treat wastewater. Our work provides new insights into the fabrication of carbon-based inorganic nanofiber mats, which have great potential in water treatment.
研究领域:
环境科学
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材料科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xiangmei Liu,Tianshe Yang,Yifan Han,Liang Zou,Huiran Yang,Jiayang Jiang,Shujuan Liu,Qiang Zhao,Wei Huang
A scalable and low-cost strategy is developed to fabricate a novel CuS/SiO2-based nanotherapeutic agent for dual-model imaging-guided photothermal/photodynamic combined therapy. In this design, mesoporous silica nanoparticles (MSNs) with CuS bundled in the channel are obtained in aqueous solution via in situ growth route for the first time. Furthermore, to achieve a more efficient therapy, photosensitizer (complex Ir-2) and bovine serum albumin are sequentially assembled via layer-by-layer method. The as-prepared complex Ir-2 presents a remarkably high 1O2 generation (ΦΔ = 1.3) under light illumination to offer effective photodynamic cell killing, and MSN/CuS exhibits high photothermal conversion efficiency (η = 31.7%) under illumination by 808 nm light to offer hyperthermia tumor ablation. In vitro and in vivo analyses show that the as-obtained nanotherapeutic agents exhibit excellent performance in tumor therapy even under irradiation with low power because of the high yield of 1O2 combined with the high photothermal conversion efficiency. Additionally, the nanotherapeutic agents are readily visualized in vivo via near-infrared fluorescence and thermal imaging. More importantly, based on the strategy of in situ growth and layer-by-layer assembly developed in this study, the development of other “all-in-one” multifunctional theranostic platform with high efficiency can be predictable.
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2017
·
IF 2.714
Zhihai Cao,Hangnan Chen,Yi Shang,Yushan Zhang,Dongming Qi,Ulrich Ziener
Rice roll-like (RR-like) Au/SiO 2 nanocatalysts (NCs) were synthesized through simultaneous sol–gel process of tetramethoxysilane and 3-aminopropyltriethoxysilane (APTES) and in situ reduction of gold salt in inverse miniemulsions. APTES played an important role in formation of RR-like SiO 2 nano-supports, reduction of gold salts to narrowly size-distributed sub–10 nm Au nanoparticles (NPs), and improved attachment of Au NPs to the SiO 2 nano-supports. The prepared RR-like Au/SiO 2 NCs displayed a pH-dependent, reversible colloidal stability in water, which facilitated to recycle them through tuning the pH value of the dispersion. Most importantly, the catalytic activity of the RR-like Au/SiO 2 NCs towards reduction of p -nitrophenol was about 7–9 times higher than that of the raspberry-like Au/SiO 2 NCs reported in our previous paper (Colloids Surf. A, 489, 2016, 223–233). The formation mechanism of the RR-like Au/SiO 2 NCs was also discussed.
研究领域:
材料科学
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催化
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Yuan Zhou,Zhanfang Ma
Pursuing for a simple, sensitive and inexpensive method of detecting copper ions is very essential for both environment and human health. Herein, a new strategy for fluorescence detection of Cu 2+ was designed which is based on the reduction of Cu 2+ to Cu + by sodium ascorbate to get cycloaddition reaction between 4-azidobenzoic acid-tagged Au@SiO 2 and propiolic acid-tagged carbon dots (CDs). The proposed approach not only possesses a good selectivity, but also has a linear relationship between the fluorescence intensity and the concentrations of Cu 2+ in the range of 0.1–100 nM with the detection limit of 0.08 nM (5.12 × 10 −9 mg mL −1 ), which is far below the limit value of 1.3 mg mL −1 defined by U.S. Environmental Protection Agency in drinkable water. In the actual sample, the standard deviation ranges from 97.6% to 101.8%, indicating the high precision of present approach.
研究领域:
分析化学
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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
REACTIVE & FUNCTIONAL POLYMERS
·
2020
·
IF 3.333
Jiahong Wang,Min Mao,Saleem Atif,Yao Chen
The presence of widely used chelating agents such as ethylenediaminetetraacetic acid (EDTA) in aqueous solution increases the difficulty of heavy metal removal by the formation of heavy metal chelates. In this study, diethylenetriaminepentaacetic acid (DTPA)-chitosan functionalized magnetic silica (Fe 3 O 4 @SiO 2 /Cs-DTPA) was developed for the removal of Cr(III) and Cr(III)-EDTA. The obtained results from characterization confirmed that Fe 3 O 4 @SiO 2 /Cs-DTPA with the core-shell structure and superparamagnetic properties was synthesized. The maximum theoretical adsorption capacity of Cr(III) and Cr(III)-EDTA chelates on the adsorbents were 39.27 and 22.24 mg/g at 25 °C and pH 4.0, respectively. Adsorption equilibrium of Cr(III) and Cr(III)-EDTA on Fe 3 O 4 @SiO 2 /Cs-DTPA was achieved within 15 min, and the adsorption data fit the pseudo second-order model. The co-existing complex agents (EDTA) and cations (Na + , Ca 2+ , and Mg 2+ ) in the aqueous solution reduced Cr(III) adsorption by the competition with Cr(III) and Cr(III)-EDTA chelate for active groups of the adsorbent. The affinity of the Fe 3 O 4 @SiO 2 /Cs-DTPA for Cr(III) and Cr(III)-EDTA was excellent even at high salt and organic chelates concentration. The Cr(III) adsorption was attributed to surface complexation between Cr(III) and DTPA moieties of the adsorbent, while Cr(III)-EDTA as a whole was adsorbed on the adsorbent by the complexation and electrostatic interaction . Cr(III) saturated Fe 3 O 4 @SiO 2 /Cs-DTPA can be readily regenerated in acid solution and Cr(III) or Cr(III)-EDTA adsorption of regenerated adsorbent exhibits no obvious reduce.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）