ENERGY & FUELS
·
2026
·Vol. 40
·期 35
·19600-19613
·
IF 6
Dai Xinrui,Lin Min,Wang Hua,Zhu Xing
High-loading chromium oxide catalysts are attractive
for the dehydrogenation
of ethylbenzene (EB) to styrene (ST), but the migration, aggregation,
and irreversible restructuring of Cr species during high-temperature
calcination and reaction often reduce active-site accessibility and
accelerate catalyst deactivation. Herein, we report a reverse double-solvent
strategy to construct a shape-preserving mesoporous SiO 2 framework within a Cr-MOF precursor, yielding a Cr@Si-6 catalyst
in which Cr 3+ -rich nanoscale Cr 2 O 3 domains and highly dispersed chromate-like Cr 6+ species
are stabilized within a silica cage-like network. This architecture
integrates three complementary structural features: the homogeneous
Cr distribution inherited from the MOF precursor, physical confinement
by the mesoporous SiO 2 framework, and chemical anchoring
with electronic regulation through Cr–O–Si interfacial
linkages, thereby reconciling high Cr loading with high dispersion.
Structural and spectroscopic characterizations show that the SiO 2 skeleton suppresses long-range Cr migration, aggregation,
and the development of bulk-like Cr 2 O 3 domains,
while Cr–O–Si interfacial coupling regulates the local
coordination and electronic environment of the Cr species and strengthens
their resistance to reduction-induced restructuring. In the chemical
looping oxidative dehydrogenation of ethylbenzene (EB-CL-ODH), lattice
oxygen participates in EB conversion during the reduction step, followed
by regeneration of the reduced catalyst in a separate O 2 oxidation step. Cr@Si-6 achieves 80% EB conversion, 91% ST selectivity,
and 73% ST yield at the moderate temperature of 450 ° C, outperforming
directly calcined Cr-MOF-600 and conventional Cr/SiO 2 ,
while maintaining an ST selectivity above 90% with no obvious decay
in EB conversion over 40 redox cycles. Postreaction XRD, Raman, TG/DTG,
GC–MS/TIC, and SEM/EDS analyses further show that the confined
Cr 2 O 3 /SiO 2 architecture is largely
preserved and that reaction-induced carbonaceous and heavy organic
deposits can be substantially removed through oxidative regeneration.
This work demonstrates that integrating MOF-derived Cr distribution,
mesoporous silica confinement, and Cr–O–Si interfacial
regulation provides an effective strategy for constructing high-loading,
highly dispersed, and regenerable Cr-based oxygen carriers for moderate-temperature
EB-CL-ODH.
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高影响因子
POLYMER
·
2025
·
IF 4.5
Yuxuan Zhang,Pengyu Yang,Mengyun Shen,Yuanyuan Lu,Zaosheng Lv,Yanfen Huang
Fog, a ubiquitous natural phenomenon, wreaks havoc on medical and transportation sectors, spurring an intense quest for cutting-edge anti-fog coatings. This study introduced an interpenetrating polymer network (IPN) structure into polyacrylic acid (PAA), addressing the issue of high swelling ratio in PAA. This enhanced the mechanical properties of the hydrogel, thereby improving light transmittance and endowing the PAA-based superhydrophilic coating with anti-fog functionality. By incorporating nano-SiO 2 particles into this polymer solution, we developed an organic-inorganic composite anti-fog coating. This coating inherently exhibits high light transmittance (95 %). At a nano-SiO 2 content of 10 %, the coating demonstrates resistance to temperatures as low as −70 °C (transmittance 91.7 %) and acid resistance (transmittance 90.7 %). It maintains excellent anti-fog performance after rice abrasion testing and cyclic anti-fog testing. Additionally, the prepared anti-fog superhydrophilic coating possesses antibacterial properties (99 % inhibition rate).
研究领域:
材料科学
·
高分子化学
·
表面涂层技术
·
纳米材料
·
功能材料
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高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Xiayi (Eric) Hu,Xuechun Feng,Mingming Fei,Mi Tian,Rui Zhang,Yefeng Zhou,Yang Liu,Zhaogang Zeng
The application of organic dyes in industry is severely limited due to its insolubility and instability. The adsorption of organic dyes by inorganic materials to form hybrid pigment is a valid method to improve its stability, thus widening its applications in industries. A simple method for preparing stable hybrid pigment by adsorpting Acid Red 73 (AR73) on the chitosan (CTS) modified sepiolite with a SiO2 coating is explored in this work. Sepiolite modified by the CTS was used to immobilize AR73 (CTS-sep/AR73) uniformly to form a hybrid pigment. The effects of the dosage of CTS, the concentration of acetic acid (HAc) and the pH of AR73 solution for CTS-sep adsorption of AR73 were investigated. CTS-sep/AR73 was further coated with a layer of SiO2 to form the CTS-sep/AR73@SiO2 pigment, which enhanced the stabilities of the hybrid pigment. The CTS-sep/AR73@SiO2 pigment shows excellent stability in strong acid, strong alkali and anhydrous ethanol environment, along with the improved thermal ageing, intensified UV resistance, and enhanced thermal stability (more than 220 °C) which is higher than that of CTS-sep/AR73 hybrid pigment.
研究领域:
材料科学
·
化学工程
·
颜料技术
·
环境科学
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高影响因子
Nanomedicine-Nanotechnology Biology and Medicine
·
2015
·
IF 6.155
Jinrui Gan,Xiang Wei,Yixin Li,Jiao Wu,Kun Qian,Baohong Liu
We report a novel platform using optimized SiO 2 @Au core–shell structures as matrices for highly efficient laser desorption/ionization mass spectrometry analysis of small biomolecules (MW < 700 Da). Owing to the designer structure, SiO 2 @Au nanoshells can achieve low detection-of-limits (~ pmol–fmol) in mass spectrometry and selective laser desorption/ionization in bio-mixtures towards diverse small molecules. By further surface modification with aptamers , Apt-SiO 2 @Au nanoshells allowed simultaneously targeted enrichment and detection of kanamycin with a detection limit at 200 pM. Our work not only starts new applications of SiO 2 @Au nanoshells in mass spectrometry, but also contributes to advanced analysis of either a group of small molecules or one target small molecule from complex bio-samples in a pre-designed manner for bio-diagnostics. From the Clinical Editor Existing methods for the detection of small molecules are often not sensitive enough. Here, the authors developed aptamer functionalized [email protected] nanoshells for use in mass spectrometry, with very low detection limits. The new platform appeared to be simple and efficient and should be applicable in detection of clinical samples.
研究领域:
分析化学
·
质谱技术
·
生物传感器
·
纳米技术
·
临床诊断
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xingtao Qi,Ze Zhang,Chuanbao Tu,Chao Zhu,Junchao Wei,Zhenyu Yang
Due to the deficiency of low melting point and poor wettability of commercial polyolefin separators, the design and development of ceramic coating separators have been received more and more attention in Li-ion batteries recently. However, it is challenging to solve the disadvantageous exfoliation issue of ceramic coating during charge/discharge cycles and needs to be addressed urgently. Herein, a covalent grafting interface engineering strategy has been proposed to prepare a highly efficient and stable polypropylene/mSiO 2 separator (PP-g-mSiO 2 ) by the nanoscale mSiO 2 layer anchoring on the surface of PP separator with covalent bonding. As expected, the covalent bonding force increase the interfacial stability of PP-g-mSiO 2 separator and the mSiO 2 NPs facilitate more storage of electrolyte, which results in high thermal stability, high electrolyte affinity and swift lithium-ion diffusion . When used as the separator in LIBs, the Li/LiFePO 4 cell with PP-g-mSiO 2 separator exhibits excellent rate capability with a discharge capacity of 101 mA h/g at 5 C and remains high capacity retention of 93% after 1000 continuous charge–discharge cycles, which suggests that the PP-g-mSiO 2 separator possesses a stable and covalent grafting ceramic surface and have greater affinity to electrolyte, resulting in quicker lithium-ion diffusion and excellent cycling stability. Therefore, the covalent grafting interface modification has confirmed an effective strategy to block exfoliation issues of ceramic coating and developed the high-performance ceramic separators for LIBs.
研究领域:
材料科学
·
能源存储与转换
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高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Ke Liang,Lili Hu,Jinjun Ren
Mixed-network former glasses have drawn considerable attention for their ability to combine the advantages of different glass formers. However, chemical incompatibilities among formers often lead to phase separation, hindering practical applications. In this work, glasses with the composition xAl2O3-(80-x)NaPO3-20SiO2 (x = 0, 10, 15, 20, 25 mol %) were synthesized via the melt-quenching method. The atomic-scale structure of these glasses was elucidated using advanced solid-state nuclear magnetic resonance (SSNMR) techniques, including single pulse Magic Angle Spinning (MAS), 31P refocused Incredible Natural Abundance Double Quantum Transfer Experiment (refocused INADEQUATE), Double-Quantum based Dipolar Recoupling Effects Nuclear Alignment Reduction (DQ-DRENAR), 27Al{31P} Rotational Echo Double Resonance (REDOR), 31P{27Al} Rotational Echo Adiabatic Passage Double Resonance (REAPDOR). The results reveal that the 80NaPO3-20SiO2 glass predominantly contains homonuclear linkages (P–O–P, Si–O–Si), while heteronuclear P–O–Si bonds are less favored, leading to Na+ ions enrichment in phosphate-rich regions and evident phase separation. Incorporating Al2O3 promotes P–O–Al bond formation; when the average number of Al atoms bonded per phosphorus exceeds 2, further alumina incorporation promotes the formation of Si–O–Al linkages. Concurrently, Na+ ions begin to migrate from the vicinity of phosphate tetrahedra [PO4] toward silicate tetrahedra [SiO4]. This compositional evolution facilitates the progressive formation of Si–O–Al–O–P linkages, which effectively suppresses phase separation and yields a more homogeneous glass structure.
研究领域:
材料科学
·
玻璃化学
·
固体核磁共振波谱
·
无机化学
·
非晶态材料
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高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18616-18625
·
IF 14.511
Xiukun Liu,Xu Xu,Fangjia Zhang,Xiangchao Ge,Haifeng Ji,Yuqi Li,Shaorong Lu,Zhen Wen
A sustainable, reliable and self-powered anti-corrosion method for metallic structures is key to improving the operation stability and service life of equipment. In this work, a series of durable superhydrophobic fluorinated silica (F-SiO2)/epoxy resin (FE) coatings with good corrosion resistance were prepared via a simple spraying method, which were further used to fabricate a FE based triboelectric nanogenerator (FE-TENG). A synergistic anti-corrosion system for self-powered cathodic protection constructed using the superhydrophobic FE coating and a water wave-driven FE-TENG was then proposed. In a 3.5 wt% NaCl solution, the corrosion potential (Ecorr) of an aluminum (Al) sheet protected by the FE-TENG self-powered cathodic protection was slightly decreased by 80 mV. However, when the Al sheet was coated with a FE superhydrophobic coating, the Ecorr was significantly reduced by 460 mV under FE-TENG protection. Notably, the Ecorr of 304 stainless steel protected by the synergistic anti-corrosion system was dramatically decreased by ∼745 mV. Furthermore, an application in marine corrosion protection was demonstrated by using a float-like spherical FE-TENG. This work demonstrates a cost-effective and large-scale strategy for preparing a superhydrophobic FE coating, using which a self-powered synergistic anti-corrosion system is built for effectively protecting metals from corrosion.
研究领域:
材料科学
·
腐蚀与防护
·
纳米能源
·
表面工程
·
功能材料
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 14
·12045-12054
·
IF 2.324
Huang Zhaohui,Chen Hui,Zhao Lei,He Xuan,Fang Wei,Du Yingying,Li Weixin,Wang Guanghui,Zhang Fuqing
With increasing concern about the problems of environmental pollution and energy, the visible light photocatalytic for dye degradation is receiving considerable attention. CdSe quantum dot (CdSe QDs) sensitized MIL-125/TiO 2 @SiO 2 biogenic hierarchical materials (CMTS) has been fabricated through dual modification of CdSe with TiO 2 and MIL-125, that is the metal–organic framework (MOF) with Ti ions as metal centers and terephthalic acid as the organic ligand. The hierarchical porous heterostructured MIL-125/TiO 2 @SiO 2 composites are firstly obtained by a biogenic-templated method using rice husk as biomorphic. CdSe QDs as sensitizer is further deposited on MIL-125/TiO 2 @SiO 2 via a dipping method. This strategy applies CdSe, MIL-125, and TiO 2 undergo a two-level heterostructure, setting a stage for efficient charge separation. In addition, CMTS possesses a hierarchical porous structure in scale from micrometer to nanometer with high BET surface area. As a result, the CMTS can efficiently adsorption target, improving light harvesting and promoting degradation of organic waste from water. Meanwhile, Rhodamine B aqueous solution can be degraded more than 98% by CMTS in 100 min under visible light irradiation.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2018
·Vol. 50
·期 1
·242-250
·
IF 1.834
Xiao Jiusan,Wang Qi,Jiang Bo,Zhu Hongmin
Carbothermic selective reduction of titanium concentrate ore for the preparation of titanium oxycarbide was presented and SiO 2 was found to be partly reduced during the process. The equilibrium relationship between Si dissolved in metallic Fe and SiO 2 existed in corresponding slag was analyzed thermodynamically, and then revealed by a series of designed equilibration experiments. The results are in accordance with the calculated values obtained from thermodynamic analysis and have well explained the phenomenon that part of SiO 2 is reduced during selective reduction processing of titanium concentrate ore.
研究领域:
冶金学
·
材料科学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2026
·
IF 3.8
Shuya Ning,Chi Zhang,Naming Zhang,Jin Huang,Kunping Guo,Tao Lei,Fanghui Zhang
Development of efficient fluorescence resonance energy transfer (FRET) is essential for application in optoelectronic and sensing technologies. In this work, we synthesized silica-coated silver nanoparticles (Ag@SiO 2 core-shell NPs) with different shell thicknesses and investigated their effect on a FRET system composed of CsPbBr 3 nanocrystals (NCs) and red dye 4-(Dicyanomethylene)-2-tert-butyl-6-[1,1,7,7-tetramethyljulolidin-4-yl-vinyl]-4H-pyran (DCJTB). Compared to the nanoparticle-free system, doping the CsPbBr 3 : DCJTB system with Ag@SiO 2 core-shell NPs of optimal shell thickness enhanced the fluorescence emission intensity to 3.5 times that of the nanoparticle-free FRET system and improved the FRET efficiency from 28% to 75%. Moreover, the Ag@SiO 2 NPs with the optimal shell thickness can more effectively enhance FRET efficiency than the bare Ag NPs. It is attributed to the fact that the Ag@SiO 2 core-shell NPs can simultaneously avoid quenching effect and effectively enhance the FRET efficiency through the plasmonic properties. This study provides an effective approach for designing highly efficient FRET system and offers a pathway for further enhancing the performance of optoelectronic devices.
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高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·563
·
IF 3.4
Chengqian Li,Peng Dou,Ruyi Zhao,Yurou Shi,Gaojie Fu,Bin Shen
Pollution flashover on insulators is one of the greatest challenges affecting the smooth operation of high-voltage transmission lines. Demonstrating super-hydrophobic coatings on insulators’ interfaces is an effective measure to prevent insulator flashovers. In the present investigation, a super-hydrophobic FAS-17-modified SiO2/PDMS coating on a composite insulator was demonstrated by spraying. The coating had a contact angle of 159.2° and a sliding angle of 1.3° with better insulation properties. The prepared FAS-17-modified nano-SiO2nanoparticles were not easy to agglomerate; to illustrate this, the binding energy was calculated by the density functional theory. The super-hydrophobic mechanism of the coating was explained in terms of the adsorption energy between SiO2molecules and water before and after modification. This paper provides a new method to solve the pollution flashover problem of insulators and a new angle to explain the super-hydrophobic mechanism.Keywords:super-hydrophobic;composite insulators;FAS-17-modified SiO2nanoparticles;de-agglomeration mechanism;super-hydrophobic mechanism;density functional theory
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·52958-52968
·
IF 5.8
Yuan Zhengqiu,Wu Yangfeng,Zeng Jianxian,Li Xiaoyan,Zang Kairong,Zhou Hu
In this study, hydrophobic polymer composite films based on polyurethane (PU) were prepared for oil-water separation. Hydrophilic fumed silica (nano-SiO 2 ) was introduced as reinforcing filler, and silane coupling agent (KH550) was used to crosslink PU with nano-SiO 2 in situ for enhancing the nano-SiO 2 dispersion in the films. The microscopic morphology, crystalline structure, and hydrophobic properties of the films were characterized by using scanning electron microscopy, X-ray diffraction, FTIR spectroscopy, water contact angle, and water absorption tests. The results showed that the hydrophobicity of the nano-SiO 2 /PU composite films increased with the addition of nano-SiO 2 . KH550 not only significantly promoted the crosslink action between PU and nano-SiO 2 but also enhanced the dispersion of nano-SiO 2 in the composite films. Moreover, the pore structure of the prepared films was changed with the addition of nano-SiO 2 and KH550, which greatly improved the hydrophobicity. The test results for oil-water separation performance showed that the prepared composite films can efficiently separate the oil from oil-water mixtures with good repeatability.
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）