JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Xiaoqing Guo,Shuangju Song,Xue Jiang,Jingru Cui,Yunshuai Li,Wenqing Lv,Haiyan Liu,Yuanyuan Han,Liyong Wang
In this present work, a room temperature coprecipitation method for the synthesis of CaMoO 4 @SiO 2 :Ln (Eu 3+ , Tb 3+ , Dy 3+ ) phosphors was reported. These particles were characterized using X-ray diffraction (XRD), Energy dispersive spectrometer (EDS), Fourier Transform IR spectroscopy (FTIR), scanning electron microscope (SEM), UV-visible spectrophotometer and photoluminescence (PL) respectively. The results indicated that emission intensity of SiO 2 modified samples increased by about 2 times, compared with no-silica modified samples. Multicolor phosphors were also designed by changing the lattice activators (Eu 3+ , Tb 3+ , Dy 3+ ). To further explore its applications, the transparent photoluminescent film was developed through the incorporation of polyvinyl alcohol (PVA), and selective and sensitive detection performance on dichromate was demonstrated in detail. In addition, red emission LED devices was assembled with as-prepared phosphors. The present results provide not only the high-performance phosphors modified by silica , but also a deep explanation of the structure-property relationship of the as-prepared sample. Based on these findings, it can be foreseen that these microparticles will be applied in versatile filed.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Panpan Zhou,Jing Zhang,Hongli Zhu,Lixi Wang,Xiaokang Wang,Zhi Song,Qitu Zhang,Mingxun Yu,Zhihao Liu,Tong Xu,Wanxun Feng,Xia Feng
Ordered mesoporous carbon (OMC) is considered to be a prospective carbon-based material for microwave absorption because of its abundant well-ordered mesoporous structures, high specific surface area, numerous active sites, and facile preparation process. However, its development has been seriously hindered by its poor impedance-matching characteristic. Herein, silica-modified OMC composites with a designable impedance-matching transition layer are successfully fabricated via a self-assembly method and succeeding calcination treatment. In addition, the silica in OMC@SiO2 composites can maintain the mesoporous structure, which facilitates the scattering and reflection of microwaves in the tunnel structure. The as-prepared sample OMC-5@SiO2 exhibits a minimum reflection loss (RL) value of −40.7 dB at 10.8 GHz with 2 mm and an effective absorption bandwidth (RL ≤ −10 dB) of 4.8 GHz with a thinner absorber thickness of 1.5 mm. We believe that the as-prepared OMC@SiO2 composites can be prospective candidates as high-efficiency and lightweight microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2015
·
IF 1.173
Yangbo Huang,Haiyang Jin,Ping Yu,Yunbai Luo
In this study, polyamide thin-film nanocomposite (TFN) membranes were prepared on nanosilica-modified polysulfone (PSf) support layers for forward osmosis (FO) applications. Different contents of SiO2 nanoparticles (1, 3, and 5 wt%) were added to a dope solution to develop FO membranes with improved performance. The effects of SiO2 on the membranes were investigated by attenuated total reflectance-Fourier transform infrared spectrometry, scanning electron microscope, hydrophilicity measurement, and mechanical property tests. The results showed that the wettability of PSf substrates was improved with increasing concentrations of SiO2. The resulting TFN membranes had smaller structural parameters, which meant lower internal concentration polarization effects compared to typical thin-film composite membranes. However, SiO2 nanoparticle is a good modifying agent to enhance water permeability, but it could not improve the selectivity of TFN membranes. The FO performance was evaluated using deionized water as feed solution and either 1 or 2 M NaCl as draw solution in both membrane orientations. The FO water flux of the fabricated membranes increased from 9.1 to 22.3 LMH when the active layer faced the feed solution (AL-FS) and 18.2 to 41.9 LMH when the active layer was placed towards the draw solution (AL-DS), mainly due to the improvement of PSf substrate with an addition of SiO2.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Zhicheng Wang,Weixin Xian,Yongsong Ma,Tao Xu,Rui Jiang,Hua Zhu,Xuhui Mao
Nanoscale zero-valent iron (nZVI) was not considered as an ideal candidate for catalytic ozonation process in aqueous media because of its drawbacks of rapid passivation, self-agglomeration and consequent loss of reactivity. In this study, a novel disilicate-modified nZVI (Si-nZVI) material, was prepared through a liquid-phase reducing method with hydrosoluble disilicate as a modifier. The optimal Si-nZVI catalyst (Si15-nZVI), with negligible iron leaching and a good tolerance in ozone water, showed favorable water-dispersibility to achieve a highly efficient ozonation catalysis for removing quinoline (91.9% removal efficiency). Compared to the nZVI, the Si-nZVI displayed satisfactory catalytic stability and benign reusability as well. It was revealed that [Si O Fe] OH groups on Si15-nZVI, as the dominating active centers, played an essential role to boost the adsorption and catalytic decomposition of O 3 in aqueous solution. This study demonstrates the suitability of Si-nZVI to catalytic ozonation process, and provides a prospective oxidation technology for decontamination.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Ji Feng,Wenlong Luo,Wentao He,Xingxing Ai,Pingan Song
Developing flame retardant and UV-blocking polylactide (PLA) with reinforced mechanical properties is important but challenging. Herein, bio-derived phytic acid was decorated on halloysite nanotube though silane grafting, ring-opening reaction with melamine and then electrostatic interactions with phytic acid. The obtained phopsphorous-nitrogen-silicon decorated halloysite nanotube (PNSiHNT) was incorporated into PLA to prepare PLA composites. The surface modification significantly improved the compatibility between PNSiHNT and PLA, and the flame retardant, UV-shielding and mechanical properties of the composites were enhanced. At 5% mass loading, the peak heat release and total heat release were reduced by 18% and 12% compared to pure PLA, respectively, superior to most phytic acid-based flame retardants. The relevant mechanism analysis showed that PNSiHNT can restrain the emission of combustible volatiles and promote the formation of protective char layer. Moreover, the flame-retardant PLA showed excellent UV-shielding ability with an ultraviolet protection factor (UPF) value of around 120. Due to the reinforcing effect of PNSiHNT and the strong interfacial interactions between PNSiHNT and PLA matrix, the PLA/PNSiHNT showed 77% and 116% increase in tensile strength and elongation at break compared to the bulk PLA. This study provides a strategy for designing bio-derived organic/inorganic systems for enhancing flame retardant, UV-blocking and reinforced PLA.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Saleem Raza,Hao Wen,Ye Peng,Jiayan Zhang,Xuelian Li,Changkun Liu
A special type of SiO 2 grafted biobased hollow polymeric particles was fabricated from biomass trans -anethole (ANE) monomers. The SiO 2 NPs were prepared through Stober method and then modified with APTES to generate amino functional groups. The (ANE) monomer and maleic anhydride (MAH) were copolymerized through precipitation polymerization to obtain hollow polymer particles, which were then functionalized with carboxyl groups via the hydrolyzation process. Finally, the biobased hydrolyzed hollow particles (BHHPs) were grafted with the amino-modified SiO 2 NPs to obtain SiO 2 -BHHPs. The SiO 2 -BHHPs were investigated through SEM, TEM, FT-IR, EDX and XPS techniques and used as a bioadsorbent. The maximum adsorption capacity toward methyl orange dye (MO) and bisphenol-A (BPA) reached up to 701 and 411 mg/g, with pH = 2 respectively. The adsorption isotherm and kinetic results indicated that the MO dye and BPA adsorption was best fitted with Langmuir and pseudo-second order models. Meanwhile, the adsorption ability of the prepared particles toward MO dye was checked with the different pH range from 2 to 12. The regeneration performance revealed that the SiO 2 -BHHPs can be easily recycled and reused. At last, the SiO 2 -BHHPs based materials may find significant applications as multifunctional adsorbents and can be used further for the separation of pollutants from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Jing-Ming Hao,Zhen-Yu Ma,Yong-Hui Song,Ya-Lan Hu,Guan-Jie Ding,Sami Ur Rahman,Yi-Chen Yin,Bai-Sheng Zhu,Cheng-Ming Wang,Zhi Zhao,Min Ge,Hong-Bin Yao
Perovskite light-emitting diodes (PeLEDs) exhibit exceptional potential for next-generation high definition displays. As a promising electron transport layer (ETL), inorganic zinc oxide (ZnO) can endow PeLEDs with high brightness due to its high electron mobility. However, their application in FAPbBr 3 -based green PeLEDs is hindered by detrimental interfacial reactions at ZnO/perovskite interfaces. Here, an efficient silicon oxide (SiO 2 ) modification strategy is presented for ZnO ETL to regulate interfacial reactions between ZnO and FAPbBr 3 . Introducing tetraethyl orthosilicate (TEOS) during ZnO sol-gel fabrication, a conformal SiO 2 coating forms on the ZnO surface after calcination. This modification effectively suppressed interfacial deprotonation between ZnO and FAPbBr 3 , thereby mitigating FA + depletion and enabling the formation of a highly crystalline and uniform FAPbBr 3 film. The resultant ZnO-based green PeLEDs achieved a maximum luminance exceeding 3.0 × 10 5 cd m −2 , with peak external quantum efficiency (EQE) improved from 5.0% to 10.8% compared to unmodified devices. Furthermore, this modification is applied in blue PeLEDs using FAPbBr 3-x Cl x emitter layer, delivering a peak luminance of 1003 cd m −2 . This work provides a feasible interfacial engineering strategy for ZnO ETL to achieve high-brightness PeLEDs.
研究领域:
材料科学
·
光电子学
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纳米技术
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固态照明
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显示技术
✓ 已验证
产品关联
DOI
高影响因子
BMC Chemistry
·
2025
·Vol. 19
·期 1
·1-15
·
IF 4.6
Xu Kuncheng,Wen Hongli,Song Wei,Aleem Abdur Raheem,Marimuthu Murugavelu,Chen Wang,Zhan Qiuqiang,Hakeem Deshmukh Abdul,Mahmoud Saleh T.
Water contaminated with heavy metal ions poses serious threat to the human health and environment protection. It is imperative to develop analytical tools to detect heavy metal ions. Herein, we propose autofluorescence free SiO 2 modified upconversion nanosensor for label-free and fast determination of MnO 4 − and Cr 2 O 7 2− anions. The highly efficient and multi-colour upconversion luminescence (UCL) of UCNPs@SiO 2 was effectively quenched by MnO 4 − and Cr 2 O 7 2− anions with fast response time of 2 and 1 min, respectively. The UCNPs@SiO 2 nanosensor exhibits linear detection ranges of 0.6–2000, 2–2000 µM with the LOD at 0.15, 0.04 µM for MnO 4 − and Cr 2 O 7 2− anions, respectively. The nanosensor was successfully applied for real lake and tap water samples with satisfactory results. The UCNPs@SiO 2 UCL nanosensor demonstrates autofluorescence free and fast determination of MnO 4 − and Cr 2 O 7 2− anions with high sensitivity, good specificity, low LOD, and wide linear detection range, holding great potential for food and environmental sample sensing.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
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