ENERGY
·
2025
·
IF 9.4
Jing Fan,Liang Guo,Nan He,Fenhong Song
Utilizing solar energy for photocatalytic hydrogen production provides a promising pathway for sustainable energy conversion. However, the traditional photocatalyst has the defects of excessive charge recombination speed and poor stability. In this work, a series of Si-Sn 3 O 4 /g-C 3 N 4 heterojunction catalysts were synthesized via a facile ultrasonic-assisted thermal treatment method. The optimized Si-Sn 3 O 4 -5/CN composite exhibited a remarkable hydrogen evolution rate of 5295 μmol∙g −1 h −1 under visible light, which is 2.21 and 54 times higher than that of pure g-C 3 N 4 and Si-Sn 3 O 4 , respectively. Extensive characterization (XPS, PL, EIS, etc.) confirmed the formation of a Type-II heterojunction, which significantly promotes charge separation and transfer. Furthermore, the composite demonstrated excellent photocatalytic stability over four consecutive cycles. This work offers an efficient and stable photocatalyst system for solar-driven hydrogen production and sheds light on the design of heterostructured photocatalysts.
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DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 23
·4151
·
IF 5.1
Ziliang Fan,Miaomiao Li,Xingyu Wang,Haixia Zhou,Faraz Ahmed,Yongheng Zhu
Listeria monocytogenes(LM) poses a serious threat to food safety and public health. Current detection methods suffer from drawbacks such as expensive equipment, complex procedures, and time-consuming processes, highlighting the urgent need for a simple, rapid, accurate, and cost-effective detection approach. The bacterial metabolite 3-hydroxy-2-butanone (3H2B), due to its high abundance, can serve as a reliable biomarker for detection. Herein, ordered mesoporous silica nanoparticles (MSNs) were synthesized via a one-pot method and subsequently functionalized with APTES. The NH2-MSNs-2 exhibits extremely high sensitivity (768 Hz@50 ppm) and selectivity towards 3H2B due to its high specific surface area, abundant mesoporous structure, and weak chemical adsorption between amino groups and the 3H2B. The quartz crystal microbalance (QCM) sensor developed based on this material demonstrated outstanding performance in testing the contamination levels ofLMin food. This study provides a solid foundation for further exploring the fundamental mechanisms of QCM sensors in the real-time, non-invasive detection ofLM, while also demonstrating significant application potential in the field of food safety assurance.
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DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2019
·
IF 5.439
Bingmeng Li,Dan Shu,Ruifang Wang,Lanlan Zhai,Yuye Chai,Yunjun Lan,Hongwei Cao,Chao Zou
Inspired by the common preparation method of mesoporous silica where polyethylene glycol (PEG) was used as template to obtain porous silica , PEG/silica (PEG@SiO 2 ) composite as shape-stabilized phase change material for energy storage was well prepared. In this paper, PEG was used as phase change material (PCM) to store and release thermal energy and SiO 2 acted as the supporting matrix. Various techniques were employed to characterize the structural and thermal properties of PEG@SiO 2 . The results indicate that PEG was encapsulated in SiO 2 shell with physical interactions. The phase change enthalpy of PEG@SiO 2 is 164.9 J/g in the melting process and 160.1 J/g in the solidifying process with the mass fraction of 97 wt%. It is a considerably exciting result as the value is so close to pristine PEG’s (178.6 J/g). PEG@SiO 2 exhibited excellent thermal reliability based on the results of undergoing the heating-cooling cycle 100 times. Also, PEG@SiO 2 had a good thermal stability within its working temperature range. This study provides a general approach for increasing the loading of PCMs in porous materials and thus the energy storage capability.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Zixuan Lei,Jian Wang,Chi Zhang,Qianqiu Wu,Jian Li,Yuhong Liu
Simultaneously improving mechanical strength and toughness of thermosetting polymer nanocomposites remains a great challenge even though massive efforts have been made by controlling the aggregation and interface interaction of nanoparticles . In fact, crosslinking inhomogeneity and crosslinking density of thermosetting polymer nanocomposites can also profoundly affect the competing mechanical properties. Due to their conflicting influence on the toughness and strength of thermosetting polymer nanocomposites, the difficulty lies in how to coordinate the influence effectively. In this work, a mechanically tough and strong novolac phenolic nanocomposites (ESNH) were successfully constructed by introducing a reactive core-shell POSS with nanosilica as core and epoxy-polyhedral oligomeric silsesquioxane as shell (SiO 2 @EPOSS) (ES). Via controlling the quantity and the size of self-polymerized ES phase domain, the crosslinking inhomogeneity and crosslinking density of ESNH can be diversely tuned. Especially for 3%ESNH-3%, remarkably enhanced tensile properties and fracture toughness were realized. The self-polymerized ES phase domain with relatively small quantity and size was homogeneously grafted in phenolic networks, which could pin microstructural interfaces and junct nodular domains of phenolic networks, synergistically improving the crosslinking inhomogeneity and crosslinking density. Therefore, the moderately self-polymerized ES phase domain in the phenolic networks was remarkably contributed to coordinating the performance between the fracture toughness and tensile property. This study provides a novel and efficient envision toward simultaneously improving the toughness and strength of thermosetting polymer nanocomposites via tuning their curing behavior and the corresponding microstructure.
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高影响因子
Nano Select
·
2024
·
IF 0
Zhiyu Zhang,Fei Long,Yanhong Guo,Yunxiao Liang,Jing Wang,Yong Ren
The large-sized nanofilm-constructed hierarchical porous SiO 2 (LNCHPS) is successfully prepared by the dual templating approach and subsequently used as the support for g-C 3 N 4 . A series of characterization techniques are conducted to evaluate the structure and property of the as-prepared materials. The LNCHPS possesses two sets of explicated successive pass-through macropores (0.5–1.0 µm) with large specific surface area. In addition, the macropore wall is constructed by uniform mesoporous nanofilms with the thickness ranging from 35 to 50 nm. Then, the photocatalytic property is investigated by degradations towards Rhodamine B (RhB) under simulated sunlight, in which experiments have been performed through controlling the g-C 3 N 4 loading contents, solution pH values, and photocatalyst dosages. The apparent rate constant of g-C 3 N 4 /LNCHPS could reach 0.03 min −1 under optimum conditions, showing 6.0 times that of the bulk g-C 3 N 4 . In addition, g-C 3 N 4 /LNCHPS also exhibits significantly enhanced performance in H 2 evolution (39.9 µmol h −1 ) compared to that of the bulk g-C 3 N 4 . High light absorption and utilization, enhanced adsorption capability and quick electron hole separation can render this fine structure excellent photocatalytic performance. Our work enables a facile route for large-scale preparation of g-C 3 N 4 /LNCHPS for addressing the wastewater treatment and hydrogen energy production simultaneously.
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DOI
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Jaehyeong Park,Sungjun Bae
In this study, a magnetically recyclable Pd catalyst was developed by using the novel support of iron-rich coal fly ash/silica (IRFA@SiO 2 ) for highly efficient reduction of p -nitrophenol ( p -NP). IRFA microspheres were coated with amorphous SiO 2 synthesized from non-magnetic coal fly ash (NMFA) and then loaded with Pd by impregnation method for the synthesis of Pd/IRFA@SiO 2 . Various surface analyses demonstrated that amorphous SiO 2 was well deposited on the surface of IRFA, providing a unique three-dimensionally structured SiO 2 layer to suppress aggregation of IRFA and enhance dispersion of Pd nanoparticles. Pd/IRFA@SiO 2 exhibited a significantly enhanced p -NP reduction than those of Pd/IRFA, Pd/Al 2 O 3 , and Pd/SiO 2 . Compared to other Pd- and metal-loaded catalysts, Pd/IRFA@SiO 2 showed ˜4000× enhancements in k obs-p-NP /C M (L min −1 g M −1 , M = precious metals) values and ˜3800× increases in price-normalized k obs-p-NP values, indicating that Pd/IRFA@SiO 2 is a highly efficient and cost-effective alternative catalyst. The catalyst was successfully recycled five times without significant leaching of Pd, Si, and heavy metals because of the magnetic property of Pd/IRFA@SiO 2 . The experimental results suggest the applicability of the surface-modified IRFA support for the development of novel magnetically recoverable catalysts without severe toxicity problems.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
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
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Weirui Chen,Jinxin Xie,Xukai Li,Laisheng Li
The low efficiency of peroxone (O 3 /H 2 O 2 ) at acidic and neutral pH restrained its application in water purification . To overcome this shortcoming, CeO X @SiO 2 with large surface area, abundant surface oxygen vacancies (V o ), Lewis sites (L sites) and high Ce(III)/Ce(IV) ratio were synthesized to change the traditional electron transfer pathway between O 3 and H 2 O 2 . V o was facile in absorbing H 2 O 2 to form V o -H 2 O 2 and L sites were capable of absorbing O 3 to form L-O 3 . The electron at V o could be donated to V o -H 2 O 2 and generate V o -HO 2 − , which then effectively triggered the decomposition of L-O 3 at CeO X @SiO 2 ’s interface and O 3 in bulk solution. The electron transfer at the solid-liquid interface with the help of Ce 3+ /Ce 4+ redox cycle and V o was pH independent and different from the traditional electron transfer of peroxone reaction. Nitrobenzene (NB) mineralization was promoted to 92.5% in CeO X @SiO 2 -peroxone, but only 63.8% TOC was removed in tradition peroxone process. Moreover, CeO X @SiO 2 -peroxone had a wide pH application range. NB’s degradation in CeO X @SiO 2 -peroxone process followed the co-oxidation mechanism of superoxide free (•O 2 − ) and hydroxyl radical (•OH). The finding of this study could broaden the popularization of peroxone in water treatment and provided a strategy for catalyst design.
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DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Jun Cheng,Shuanglong Yuan,Ludan Zhu,Long Chen,Chuanqi Liu,Hua Tong,Huidan Zeng
Cesium lead halide perovskite nanocrystals (CLHP NCs) have drawn considerable attention because of their promising optoelectrical properties. However, owing to the extreme vulnerability of CLHP NCs to water and polar alcohols, until now most synthesis approaches inevitably adopted ecounfriendly solvents. It is still a challenge to employ green polar alcohol (ethanol) as a solvent to synthesize CLHP NCs. In this work, we realized the room-temperature in situ synthesis of CsPbBr3/SiO2 sol entirely in ethanol by innovatively constructing amine-functionalized silica micelles, which originated from the synergistic effect of 3-aminopropyltriethoxysilane and tetraethylorthosilicate (TEOS) during an acid-catalyzed sol–gel process. The sol exhibited high stability and an absolute photoluminescence quantum yield of 61.9% in ethanol without a further modification process. The light-emitting intensity of the sol preserved for 34 days merely declined to 62.1%. This work sheds light on the less common strategy of directly synthesizing CsPbBr3 NCs and long-term stable preservation in a strongly polar solvent.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 22
·7397-7405
·
IF 4.174
Jie Chen,Yixin Gao,Haifeng Jiang,Yan Liu,Zhaohui Jin
Optimizing structure and varying doped ions are two main strategies to obtain excellent luminescence performance. Spherical morphology is considered to be the most ideal phosphor structure due to the least surface defects. Herein, a series of spherical and monodispersed Dy3+/Eu3+ co-activated SiO2@Gd2O3 core–shell phosphors with multicolor tunable luminescence were successfully prepared via a facile urea assisted precipitation method. Related chemical reactions and the possible growth mechanism of Gd2O3:Ln3+ directional deposition on the surface of SiO2 microspheres were put forward. Upon 273 nm UV radiation excitation, SiO2@Gd2O3:Dy3+ and SiO2@Gd2O3:Eu3+ samples exhibited characteristic yellow (4F9/2–6H13/2) and blue (4F9/2–6H15/2) emissions of Dy3+ and red (5D0–7F2) emission of Eu3+, respectively. Meanwhile, multicolor emissions (warm white, yellow and orange) could be easily obtained by modulating the relative content of Dy3+ and Eu3+ in SiO2@Gd2O3:Ln3+ samples under a single excitation wavelength. Moreover, it was confirmed that Dy3+ could transfer energy to Eu3+ in the form of quadrupole–quadrupole interaction and further improved the luminescence intensity of Eu3+ by comparing experimental data with theoretical calculations. These results imply that tunable luminescence Dy3+,Eu3+ co-doped SiO2@Gd2O3 microspheres have great potential applications in multicolor displays and biolabeling fields.
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高影响因子
Materials
·
2021
·Vol. 14
·期 14
·4012
·
IF 3.623
Enpei Ma,Zhenghuang Wei,Cheng Lian,Yinping Zhou,Shichang Gan,Bin Xu
This article reports the design and manufacture of colored microcapsules with specific functions and their application in architectural interior wall coating. Utilizing reactive dyes grafted SiO2shell to encapsulate paraffin through interfacial polymerization and chemical grafting methods, this experiment successfully synthesized paraffin@SiO2colored microcapsules. The observations of surface morphology demonstrated that the colored microcapsules had a regular spherical morphology and a well-defined core-shell structure. The analysis of XRD and FT-IR confirmed the presence of amorphous SiO2shell and the grafting reactive dyes, and the paraffin possessed high crystallinity. Compared with pristine paraffin, the thermal conductivity of paraffin@SiO2colored microcapsules was significantly enhanced. The results of DSC revealed that the paraffin@SiO2colored microcapsules performed high encapsulation efficiency and desirable latent heat storage capability. Besides, the examinations of UV-vis and TGA showed that the paraffin@SiO2colored microcapsules exhibited good thermal reliability, thermal stability, and UV protection property. The analysis of infrared imaging indicated that the prepared latex paint exhibited remarkable temperature-regulated property. Compared with normal interior wall coatings, the temperature was reduced by about 2.5 °C. With such incomparable features, the paraffin@SiO2colored microcapsules not only appeared well in their solar thermal energy storage and temperature-regulated property, but also make the colored latex paint coating have superb colored fixing capabilities.
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高影响因子
Solar RRL
·
2023
·Vol. 7
·期 12
·2300215
·
IF 7.9
Siwei Gu,Zheng Lu,Shuai Zou,Chengkun Wu,Chen-wei Peng,Mengfei Ni,Zhenzhen Chen,Hao Huang,Hua Sun,Haibo Wang,Xiaohong Zhang,Xiaodong Su
Herein, a solid strategy to prepare bifunctional SiO 2 coatings (BSCs) with both antireflection and luminescence downshifting properties by in situ generating YVO 4 :Eu 3+ ,Bi 3+ phosphors in SiO 2 antireflection coatings (ARCs) is reported. Namely, a self-prepared precursor solution of the downshifting phosphors is added to a mixture of commercial SiO 2 sol solution and ethanol to uniformly coat the surface of quartz glass; therefore, a novel composite porous SiO 2 coating containing in situ generated YVO 4 :Eu 3+ ,Bi 3+ phosphors (labeled SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ coating) is formed on the glass surface after annealing. The SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ BSCs can effectively convert ultraviolet (UV) region photons to visible photons that are well absorbed by silicon solar cells and have better transmittance than pure SiO 2 ARC. As proof-of-concept applications, the as-prepared optimal SiO 2 @YVO 4 :Eu 3+ ,Bi 3+ coating can effectively improve the photoelectric conversion efficiency (PCE) of tunnel oxide passivated contact solar cells by 0.18%abs and decrease the UV-induced degradation value of the PCE of silicon heterojunction solar cells by 0.62%abs compared to the pure SiO 2 ARC. The results demonstrate that in situ generating luminescence downshifting phosphors in the SiO 2 ARC of photovoltaic glass is a promising way to improve the PCE and UV stability of silicon solar cells.
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高影响因子
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