SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
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IF 4.3
Haifeng Yao,Changbo Jia,Yongping Dong
Herein, a novel sandwich electrochemiluminescence (ECL) aptasensor was developed based on the resonance energy transfer (RET) with iridium complex doped silicate nanoparticles (SiO 2 @Ir) as energy donor and gold nanoparticles modified TiVC MXene (AuNPs@TiVC) as energy acceptor. Strong anodic ECL signal of SiO 2 @Ir was obtained through both co-reactant pathway and annihilation pathway. Electrochemical results showed that SiO 2 @Ir has good electron transfer rate and large specific surface area to immobilize more aptamers. AuNPs@TiVC apparently quenched the ECL signal of SiO 2 @Ir due to the ECL resonance energy transfer between them. In the presence of kanamycin (KAN), a sandwich type sensor was formed with the aptamer probes as connecters between the donor and the acceptor, resulting in the decrease of ECL intensity. Under the optimal condition, KAN could be sensitively detected in the range of 0.1 pg/mL to 10 ng/mL with a low detection limit of 24.5 fg/mL. The proposed ECL system exhibited satisfactory analytical performance, which can realize the detection of various biological molecules by adopting suitable aptamer.
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DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
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IF 6.1
Qibao Yang,Shaobai Sang,Fuyun Yang,Yawei Li,Tianbin Zhu,Heng Wang
RO-R 2 O-Al 2 O 3 -SiO 2 enamel coatings with varying Al 2 O 3 and MgO contents were prepared for the oxidation protection of 06Ni9DR alloy steels at 1100–1200 °C. The oxidation protection ratios of these coatings were investigated under different oxidation temperatures and time, and the degradation mechanism as well as the improvements in oxidation protection were explored. The results revealed that the oxidation protection ratio of traditional enamel coating with low crystalline phase content significantly decreased with oxidation test temperatures and time. The viscosity of the liquid phase in coating reduced with temperatures, facilitating oxygen diffusion. Additionally, the interaction between the coating and the oxidation products of alloy steel further reduced the liquid phase viscosity, decreasing coating thickness and shortening oxygen diffusion paths. However, the oxidation protection of coating with higher Al 2 O 3 and MgO content were enhanced. These coatings exhibited higher crystalline phases content, which effectively increased the apparent viscosity of enamel coating and prolonged oxygen diffusion paths. The thermal stability of coating with high crystalline phases content also were improved. Among these coatings, the coating with 27.47 wt% Al 2 O 3 and 9.93 wt% MgO achieved superior oxidation protection, up to 92.1 %, 76.6 %, and 73.4 % at 1100 °C, 1150 °C, and 1200 °C for 180 min, respectively.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
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IF 4.7
Chen Li,Liting Wei,Min Chen,Jiayi Zhang,Yang Yang,Boping Liu,Yulong Jin
CrO x /VO x /TiO 2 -SiO 2 was prepared via solvent-free and conventional wet-impregnation process with ethanol as solvent. The results of ICP-OES, N 2 adsorption-desorption, SEM-EDX, Raman and DR-Uv-vis spectra indicate that well-dispersed Cr and V sites in isolated state were the main species. Bimodal ultra-high molecular weight polyethylene/high-density polyethylene in-reactor blends (UHMWPE/HDPE IRBs) could be synthesized with polymerization activity ＞ 1×10 7 gPE·mol −1 Cr·h −1 . Moreover, the two catalysts displayed similar catalytic behaviors in temperature sensitivity, H 2 response and 1-hexene copolymerization efficiency, and their polymer products also show comparable molecular weight and molecular weight distribution , which implies analogous structures of their well-dispersed active sites. By contrast, the catalyst prepared by wet-impregnation process with water as solvent exhibited poor dispersity, which is reflected by its much lower activity and very different catalytic behaviors and polymer properties when compared with the well-dispersed catalysts. Therefore, the economic and green solvent-free process is promising for preparing highly-active CrO x /VO x /TiO 2 -SiO 2 .
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高影响因子
JOURNAL OF CATALYSIS
·
2024
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IF 6.5
Ruoyuan Li,Aixia Li,Junhua Li,Yao Wang,Zhiming Liu
Selective catalytic reduction of NO x by CO (CO-SCR) in the presence of O 2 is challenging because in this process CO is prone to being oxidized by O 2 , thus inhibiting NO x reduction by CO. Furthermore, SO 2 typically leads to the deactivation of the CO-SCR catalyst. Herein, a significant promoting effect of SO 2 on Ir/SiO 2 catalyst for the CO-SCR of NO x in the presence of O 2 is reported. In-situ X-ray Absorption Fine Structure (XAFS) and X-ray photoelectron spectroscopy (XPS) analysis showed that SO 2 does not affect the chemical nature of Ir 0 under reaction conditions. However, SO 2 can be oxidized to sulfate and deposit on the catalyst surface. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis demonstrated that the presence of SO 2 can inhibit the CO + O 2 reaction, thus leaving more CO available to reduce NO x over the active Ir 0 sites. As a result, the reduction of NO x is remarkably promoted even in the presence of O 2 and SO 2 .
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高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Mingyan Chen,Chunzhan Song,Yucheng Liu,Ni Zhao,Heping Jiang,Qingxin Luo,Xiaoping Jiang
The pore structure and surface properties of ceramic membranes lead to a low separation flux, which limits their further application. Changing the microstructure of membranes by introducing new technologies is a very effective method. In this study, high flux ceramic substrate membranes were prepared by metal mesh-assisted phase inversion method, and then new PDA@SiO 2 ceramic membranes were prepared by introducing PDA@SiO 2 core-shell structure. During the phase inversion, the metal mesh pores restrict the path of the water nuclei to extract the polymer, and the microchannels grow along the extraction path, creating a uniform pore size above the metal mesh and removing the dense layer below, allowing the ceramic substrate membranes to exhibit high fluxes. PDA@SiO 2 core-shell structures were stably grown on the surface of ceramic membranes by vacuum self-assembly. Due to the introduction of hydrophilic groups and micro-nano scale roughness, the PDA@SiO 2 ceramic membranes exhibit super-hydrophilic/underwater super-oleophobic performance, stabilizing the separation of oil-in-water emulsions with excellent permeation fluxes (1058 L·m⁻²·h⁻¹·0.2 bar⁻¹) and oil removal rate (99 %). PDA@SiO 2 ceramic membranes exhibit excellent stability, fouling resistance, and durability in harsh environments, contamination tests, and cycling tests. Excellent oil-water separation, stability, and durability make PDA@SiO 2 ceramic membranes a promising solution for the treatment of oil-in-water emulsions.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yanjia Zhou,Guihong Lan,Yongqiang Liu,Songsong Xue,Bo Xu,Haiyan Qiu,Keyu Pu
To obtain a demulsification material with convenient recovery, high oil-water separation capacity, and excellent reusability, Fe 3 O 4 @SiO 2 core-shell particles and hydrophilic DMC were introduced into the acrylic ester-based polymer system to prepare a magnetic amphiphilic composite demulsifier, Fe 3 O 4 @SiO 2 /poly(SMA-co-BA-co-BZMA-co-DMC) (Fe 3 O 4 @SiO 2 /PAMCs-P). The molecular structure of Fe 3 O 4 @SiO 2 /PAMCs-P was characterized using FT-IR and XPS, while the morphology was observed using SEM. Additionally, the effects of TEOS, Fe 3 O 4 @SiO 2 core-shell particles, and DMC dosage on the demulsification performance of the composites were discussed in detail. Fe 3 O 4 @SiO 2 /PAMCs-P exhibited excellent demulsification, oil-water separation, and reusability properties for CTAB-toluene emulsions. Under magnetic field conditions, Fe 3 O 4 @SiO 2 /PAMCs-P achieved saturated separation within 2 h with a separation efficiency of 97.9%. After five consecutive separations, the separation efficiency decreased to 39.1%, but it could be restored to 91.5% of the initial separation efficiency after desorption. These results indicate that Fe 3 O 4 @SiO 2 /PAMCs-P has valuable application potential in emulsified wastewater treatment.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
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IF 4
Xingyun Zhao,Chengxiao Zhao,Rongfang Wu,Jiangyan Jin,Xiaojian Liu,Zhenwei Zhang,Siyu Yang,Ke Li,Zhenyu Li,Xuemei Qin
The development of core-shell materials for achieving more efficient and rapid chromatographic separations has remained a key objective in separation science. In this study, monodisperse SiO 2 particles (2–4 µm in diameter) were utilized to fabricate core-shell spheres through a combined approach involving a modified sol-gel process and a biphasic system. The synthesis employed 1,6-bis(triethoxysilyl) hexane (BTMSH), 1,2-bis(triethoxysilyl) ethane (BTEE) as a bridging agent with cetyltrimethylammonium bromide (CTAB) acting as a co-template. Notably, the shell thickness could be precisely tailored within the range of 70∼300 nm through systematic optimization of stirring rate, solvent selection, and silica precursor type. The separation of aromatics analytes was evaluated and that baseline separation was achieved for both molecules on all the columns packed n -octadecyltrichlorosilane modified core-shell silica particles with tunable shell thickness. Column efficiencies up to ∼168, 325 plates m -1 were achieved for pyrene on the CS X-E -C18 column ( n -octadecyltrichlorosilane modified core-shell silica). In addition, a hydrophilic interaction liquid chromatography (HILIC) core-shell stationary phase that amide modified core shell silica was prepared (named as CS X-E -AM) via an improved polymerization coating approach and applied for oligosaccharides separation. The results demonstrated that the core-shell spheres were prepared with tailored shell structure and exhibited that the column was stable and could meet the requirement for HPLC separation.
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2025
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IF 4.2
Hao Sun,Jieyu Cui,Lingjun Wei,Wanlu Zhang,Shaohong Jiang,Hui Zhou,Zhuochen Xie
Structural colors composed of silica (SiO 2 ) microspheres have attracted the attention of researchers due to their environmental sustainability, vivid colors, and dynamic adjustability. However, the coffee-ring effect is a common phenomenon that occurs during the evaporation of droplets on the paper substrate and can notably affect color performance. In this study, dopamine (DA) was employed for the oxidative self-polymerization of the surface of SiO 2 microspheres to Polydopamine (PDA), resulting in SiO 2 @PDA microspheres with different absorbance. By multilayer coating, SiO 2 @PDA induced by evaporation at room temperature was assembled into a disordered structure, facilitating bright amorphous photonic crystals (APCs) on handmade paper. The addition of the sizing agent enhanced the adhesion strength and durability of the coating. Thus, the negative impact of coffee-ring of structural color is not only reduced by multilayer coating, but it is also simple to operate and vivid colors can be constructed on handmade paper, which is conducive to replacing traditional chemically dyed paper and achieving industrial-scale production.
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高影响因子
ANALYTICAL CHEMISTRY
·
2014
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IF 5.825
Gao-Chao Fan,Li Han,Hua Zhu,Jian-Rong Zhang,Jun-Jie Zhu
An ultrasensitive photoelectrochemical sandwich immunoassay was developed to detect matrix metalloproteinase-2 (MMP-2, antigen, Ag) based on CdS:Mn/CdTe cosensitized TiO2 nanotubes (TiO2-NTs) and signal amplification of SiO2@Ab2 conjugates. Specifically, the TiO2-NTs electrode was first deposited with CdS:Mn by successive ionic layer adsorption and reaction technique and then further coated with CdTe quantum dots (QDs) via the layer-by-layer method, forming TiO2-NTs/CdS:Mn/CdTe cosensitized structure, which was employed as a matrix to immobilize capture MMP-2 antibodies (Ab1); whereas, SiO2 nanoparticles were coated with signal MMP-2 antibodies (Ab2) to form SiO2@Ab2 conjugates, which were used as signal amplification elements via the specific antibody–antigen immunoreaction between Ag and Ab2. The ultrahigh sensitivity of this immunoassay derived from the two major reasons as below. First, the TiO2-NTs/CdS:Mn/CdTe cosensitized structure could adequately absorb the light energy, dramatically promote electron transfer, and effectively inhibit the electron–hole recombination, resulting in significantly enhanced photocurrent intensity of the sensing electrode. However, in the presence of target Ag, the immobilized SiO2@Ab2 conjugates could evidently increase the steric hindrance of the sensing electrode and effectively depress the electron transfer, leading to obviously decreased photocurrent intensity. Accordingly, the well-designed photoelectrochemical immunoassay exhibited a low detection limit of 3.6 fg/mL and a wide linear range from 10 fg/mL to 500 pg/mL for target Ag detection. Meanwhile, it also presented good reproducibility, specificity, and stability and might open a new promising platform for the detection of other important biomarkers.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
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IF 5.304
Yiran Cao,Jialin Li,Mengting Chen,Linyuan Zhou,Qiyue Zhang,Weipeng Liu,Yingju Liu
Hydrogels, as an extremely hydrophilic polymer with a network-like cross-linked structure, are considered as a promising material in the field of sensing and detection. In this work, a new ratiometric fluorescence sensor on the basis of the dual-emission of gold nanoclusters (AuNCs) and carbon dots (CDs) was developed to recognize copper ions (Cu 2+ ) and glutathione (GSH). AuNCs with excellent photostability and biocompatibility could electrostatically interact with aminated-CDs@SiO 2 . After adding Cu 2+ , the fluorescence of AuNCs gradually weakened, while the fluorescence of CDs in silicon spheres was basically not affected, thus a fluorescence ratio signal was generated to realize the recognition of Cu 2+ . Subsequently, the strong combination of GSH with Cu 2+ could recover the fluorescence of AuNCs, and a new fluorescence ratio signal was generated to further recognize GSH. The developed ratiometric fluorescence sensor could detect Cu 2+ over a range from 0.5 to 16 μM with a detection limit of 0.25 μM and GSH over a range from 0.05 to 48 μM with a detection limit of 0.035 μM. Such dual-emission CDs@SiO 2 /AuNCs fluorescent probe was located in the visible region, thus a multi-color fluorescent platform for the alternative visual recognition of Cu 2+ and GSH was realized by implanting CDs@SiO 2 /AuNCs in agar gel. The construction of multicolor fluorescent hydrogels can be not only applied to fast and visual on-site sensing, but also used in the bioimaging, information encoding, and other fields.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
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IF 3.834
Shenhao Yuan,Xushuai Lv,Yiwei Zhang,Yangjin Wu,Chunfeng Mao,Yuming Zhou,Wenxia Chen,Yanyun Wang
A core-shell structure Au-based catalysts mSiO 2 /Au/Co 3 O 4 HS were successfully derived from in-situ growth ZIF-67 hollow spheres, which were synthesized by a one-step soft template method. The samples were characterized by SEM, TEM, EDX, XPS, XRD and BET to confirm its successful preparation and structural features. The catalytic performance of the catalysts were evaluated by liquid phase oxidation of benzyl alcohol to benzaldehyde with O 2 as the oxidant under alkaline conditions. The experimental results illustrated that reaction conditions, including effect of catalyst amount, oxygen flow rate, reaction temperature and reaction time, were optimized to be 40 mg, 50 ml/min, 140 °C and 5 h, respectively. Meanwhile, 55% conversion of benzyl alcohol and 84% selectivitiy to benzaldehyde together with the excellent reusability and stability were achieved under optimal reaction conditions, which was attributed to the core-shell structure leading to the encapsulation of Au NPs and provision of multiple active reaction interface. Based on the intermediates formed from the de-protonation of substrate, a plausible oxidation reaction mechanism with mSiO 2 /Au/Co 3 O 4 HS catalysts was tentatively proposed to study the relationship between structure and catalytic performance.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
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IF 5.518
Ning Li,Hong Shao,Haina Qi,Yuqi Sheng,Liu Yang,Yunrui Xie,Dan Li,Wensheng Yu,Qianli Ma,Xiangting Dong
A simple and universal technique of the combination of uniaxial electrospinning with subsequent peculiar dual-crucible fluorination technology is innovatively designed and used to construct metallic fluorides yolk-shell nanofibers (YSNFs) and yolk-shell nanobelts (YSNBs) directly for the first time. As a case study, Yb 3+ /Er 3+ co-doped alkaline earth metal fluoride (BaF 2 , SrF 2 and CaF 2 ) as core layer and SiO 2 as shell layer are applied to construct the yolk-shell one-dimensional nanostructures . Under the optimum calcination temperature (600 °C) and time (5 h), the obtained MF 2 :Yb 3+ , Er 3+ /SiO 2 (M=Ba, Sr, Ca) samples are of pure cubic phase, and display the yolk-shell nanofibers and yolk-shell nanobelts with good size uniformity and green up-converting fluorescence. By HF acid treatment of the samples, it is not only proved that the shell layer is SiO 2 , but also independent core-layer MF 2 :Yb 3+ , Er 3+ (M=Ba, Sr, Ca) nanofibers and nanobelts with good size uniformity and excellent up-conversion luminescence are obtained. Especially, only fluorination process among the halogenation can form such exceptive YSNFs and YSNBs one-dimensional nanostructures , and the formation mechanisms of YSNFs and YSNBs are proposed and verified, and further the novel technique is established. The new technique possesses the merits of simple device and easy operation, large output, well-defined morphology and high preparative success rate of yolk-shell nanofiber and yolk-shell nanobelt, universality to metallic fluorides. The design philosophy and the construction technique for the exceptional yolk-shell one-dimensional nanostructures afford a facile approach for the fabrication of other functional metal fluorides yolk-shell one-dimensional nanostructures.
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高影响因子
危险品化学品经营许可证（带存储）