Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-9
·
IF 3.159
Song Longfei,Luo Linqu,Xi Yan,Song Jianjun,Wang Ying,Yang Liping,Wang Anqi,Chen Yunfa,Han Ning,Wang Fengyun
Although significant developments have been made in the low-concentration formaldehyde monitoring in indoor air by using gas sensors, they still suffer from insufficient performance for achieving ppb-level detection. In this work, <100> oriented Si nanowires (SiNWs) with high specific surface area were prepared via metal-assisted chemical etching method (MACE), and then were uniformly coated with graphene oxide (GO) followed by the subsequent reductive process in H 2 /Ar atmosphere at 800 °C to obtain reduced graphene oxide (RGO). The RGO coating (RGO@n-SiNWs) obviously enhances SiNWs sensitivity to low-concentration formaldehyde, benefiting from the increased specific surface area, the sensitization effect of RGO, and the formation of p-n junction between SiNWs and RGO. Specifically, RGO@n-SiNWs exhibits a high response of 6.4 to 10 ppm formaldehyde at 300 °C, which is about 2.6 times higher than that of pristine SiNWs (~ 2.5). Furthermore, the RGO@n-SiNWs show a high response of 2.4 to 0.1 ppm formaldehyde which is the largest permissive concentration in indoor air, a low detection limit of 35 ppb obtained by non-linear fitting, and fast response/recovery times of 30 and 10 s. In the meanwhile, the sensor also shows high selectivity over other typical interfering gases such as ethanol, acetone, ammonia, methanol, xylene, and toluene, and shows a high stability over a measurement period of 6 days. These results enable the highly sensitive, selective, and stable detection of low-concentration formaldehyde to guarantee safety of indoor environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Gang Li,Han Hua,Qican Zhou,Yiping Su,Chenye Wang,Xuehua Shen,Zuotai Zhang
Mechanochemical carbonation (MC) of alkaline solid wastes (ASW) has emerged as a promising strategy for CO2 sequestration. However, CaCO3 polymorphs formed during carbonation exhibit distinct transformation pathways that influence both sequestration durability and downstream utilization. Here, we elucidate how inherent Mg and Si species in ASW govern CaCO3 polymorph during MC. Using steel slag (SS) and blast furnace slag (BFS) as representative ASW with distinct Si/Mg availabilities, and NaHCO3 as a carbon source, we systematically investigated polymorph evolution, carbonation kinetics, and microstructure development. During carbonation, SS initially forms calcite (31.7 wt %), which transforms into monohydrocalcite (MHC, 20.4 wt % at 12 h), whereas BFS continuously yields aragonite (30.1 wt % at 12 h). These pathways stem from distinct gel-mediated microenvironments: amorphous silica gel in SS creates localized carbonate supersaturation and hydrous conditions, which kinetically promote MHC reprecipitation; whereas magnesium silicate hydrate-like (M-S-H-like) gel in BFS provides Mg-enriched surfaces (Mg/Ca = 0.98) that facilitate aragonite nucleation. Furthermore, model experiments employing carbide slag (CS, primarily Ca(OH)2) with controlled Si/Mg additives further confirm this mechanistic relationship. These findings establish a gel-mediated mechanism for CaCO3 polymorph selection and provide a basis for rationally tuning carbonation products in complex waste-derived systems.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 28
·39406-39416
·
IF 7.8
Jia Chunyuan,Li Xin,Lyu Jinze,Wang Likui,Li Ying,Zhu Haiyan,Shi Gang
Metallic materials (such as Ti, Pt, and Ag) modified
on silicon-based
photocathodes exhibit strong light reflection, which significantly
hinders light absorption by the underlying silicon (Si), thereby limiting
the efficiency of Si-based photocathodes. Herein, a high-performance
Si-based photocathode is designed by spatial confinement strategy.
The Pt cocatalysts are confined to the Ti protective layer at the
top of the pyramid, which serve as catalytic active sites for the
photoelectrochemical hydrogen evolution reaction. The other regions
are covered by the SiO 2 layer, which allow incident light
to penetrate and be absorbed by the underlying Si. This design effectively
suppresses parasitic light absorption, thereby enhancing the photoelectrochemical
performance of the Si-based photocathodes. In addition, the SiO 2 layer and the Ti layer can protect Si from being corroded
by the electrolyte. Under 1 sun (AM 1.5G) illumination, the OP-Si/SiO 2 /Ti/Pt photocathode exhibits an onset potential of 0.415 V
vs reversible hydrogen electrode (RHE) and a photocurrent density
of −13.93 mA cm –2 at 0 V vs RHE, which is
significantly superior to the control photocathode (OP-Si/Ti/Pt).
This work provides a promising avenue to develop highly efficient
Si-based photocathodes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2026
·
IF 6
Guo-Sheng Zhang,Guo-Zheng Li,Long-Ge Hu,Chen Chen,Pei-Ying Peng,Ying-Xi Hua,Ye Liu
Synthesis of silyl-containing phosphines. • Hydrosilyl-containing phosphines as hydrido-source for formation of rhodium-hydride intermediate. • Hydroaminomethylation with hydrosilyl-containing phosphine ( L2 ) modified Rh-catalyst. Herein a series of silyl-containing P,Si-hybrid ligands ( L2-L6 ) were synthesized, in which L2 was first obtained via the combination of a bulky hydrosilyl-group (Ph 2 HSi-) and a bulky ( t -Bu) 2 P-fragment. The as-synthesized L2-L6 were fully characterized by 31 P/ 1 H/ 13 C NMR and the single-crystal X-ray diffraction to verify the presence of the expected Si-H moiety and their influence on the adjacent phosphine fragment. It was indicated that the incorporated hydrosilyl-group in L2 not only effectively adjusts the electronic and steric effects on the adjacent phosphino-groups but also could directly serve as a hydrido-source to promote the formation of the Rh-H (rhodium-hydride) active intermediate, thereby allowing an efficient Rh-catalyzed hydroaminomethylation of olefins. The 1 H NMR characterization proved that the presence of Si-H moieties in L2 enables the formation of stable Rh-H active species even at room temperature. This efficient generation of metal hydride greatly facilitates the first-step hydroformylation and the second-step condensation, thereby promoting the overall hydroaminomethylation sequence. Download: Download high-res image (208KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 10
·407
·
IF 3.5
Zhao Xiaoke,Yang Doudou,Guo Xiuyan,Sun Ling,Liu Xiaohui,Ren Yuanlin,Li Yuesheng
Driven by the increasing demand for wooden furniture, polyurethane (PU) with flame-retardant properties is widely used in woodworking. In this work, 6-(3-(2,3-dihydroxypropoxy)propyl)dibenzo[c, e] [1, 2] oxaphosphinine 6-oxide (DG) was synthesized via addition reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 3-allyloxy-1,2-propanediol. Subsequently, DG and hBN were incorporated into the PU matrix, dual crosslinking agents triethanolamine and triethoxy(3-glycidyloxypropyl)silane were introduced and the PU was then applied to wood via hot-pressing and coating methods. Compared with unmodified flame retardant wood, the modified wood achieves UL-94 V-0 rating with reduced heat release rate by 26.25% and total heat release by 14.04%. Moreover, thermogravimetric analysis confirms enhanced thermal stability, with T 5% rising from 258 ℃ to 273 ℃ and 800 ℃ residue 13.36% to 23.01%. Simultaneously, the PU exhibits excellent water resistance, with water absorption rates remaining below 3% after 24 h of immersion. This study develops and demonstrates a novel strategy for fabricating wood-based flame-retardant composites, which yields high-performance PU coatings that combine excellent flame retardancy with water resistance for wood product applications.
✓ 已验证
DOI
高影响因子
Foods
·
2026
·Vol. 15
·期 10
·1738
·
IF 6
Yu Wang,Chengming Wang,Guowei Ling,Mingshuang Xia,Yuhan Yi,Shilin Liu,Wenlin Li
Traditional activated clay (AC) bleaching usually shows limited adsorption selectivity, leading to micronutrient loss during pigment removal, and also suffers from high residual oil retention and poor regenerability. Developing mild bleaching materials with both high adsorption efficiency and selectivity is therefore important for oil refining. Mesoporous Al-MCM-41 (AM) adsorbents with different Si/Al ratios were prepared and characterized in pore structure and acidity, and the bleaching performance against AC in terms of pigment removal and the retention of micronutrients in rapeseed oil and the bleaching mechanism were studied. The results showed that AM25 (Si/Al = 25) exhibited the best overall performance among the AM samples under the tested conditions (70 °C, 20 min). It achieved a bleaching efficiency of 92.3% and removed 94.56% of chlorophyll, 92.94% of lutein, and 84.09% of β-carotene. In addition, AM25 reduced the peroxide value from 2.52 to 0.58 mmol/kg. High retentions of tocopherols (93.89%), phytosterols (98.73%), and squalene (96.32%) were also observed. Meanwhile, the adsorption rates of α-tocopherol, brassicasterol, and α-linolenic acid showed the highest values in their relative homologues of tocopherols, phytosterols, and free fatty acids (FFAs), respectively, due to differences in the methyl amount of tocopherols, the side-chain unsaturation of phytosterols, and the fatty acid chain unsaturation of fatty acids. Furthermore, the kinetic and isotherm data for chlorophyll and carotenoids were better described by the pseudo-second-order and Freundlich models, respectively. Combined with thermodynamic analysis, they indicated that adsorption was a spontaneous, endothermic, entropy-driven, heterogeneous multilayer process dominated by physical adsorption. Further, pigment adsorption was mainly governed by uniform mesopores and Si–OH/Si–OH–Al sites in AM. Among them, carotenoid removal depended primarily on the dispersion effect of moderately strong acid sites within pore-confined regions, whereas chlorophyll removal was more sensitive to the number of acidic sites in AM. AM25 still maintained 83.31% bleaching efficiency after five regeneration cycles. These performances of AM25 are significantly superior to that of AC.
✓ 已验证
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Dingping Huang,Rui Zhang,Hongyuan Wei,Huanhuan Liu,Wanjun Mu,Zeng Huang,Wenkun Zhu
The radionuclide 90 Y is essential for targeted tumor radiotherapy, yet its clinical utilization relies on efficient isolation from parent 90 Sr. Bare TiO 2 exhibits low Y 3+ uptake and weak Sr/Y selectivity, restricting its practical deployment. Silicon-doped TiO 2 microspheres (Si-TiO 2 ) were fabricated via a two-step route with tuned Si doping. Multiscale characterizations verify lattice incorporation of Si 4+ , which greatly elevates the material’s specific surface area and surface hydroxyl abundance. The optimized Si-TiO 2 realizes near-quantitative Y 3+ capture over pH 3–7, delivering a maximum Sr/Y separation factor of 400 and a Y 3+ adsorption capacity of 15.21 mg/g at 298 K. Adsorption obeys the pseudo-second-order kinetics and Langmuir isotherm, corresponding to spontaneous endothermic chemisorption. The material also possesses outstanding acid-base tolerance, recyclability and dynamic column separation capability. Mechanistic analyses confirm that selective Y 3+ uptake originates from surface complexation between Y 3+ and surface Ti-OH sites. This work provides a potential inorganic adsorbent candidate for developing ⁹⁰Sr/⁹⁰Y medical generators. Download: Download high-res image (236KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2024
·Vol. 35
·期 1
·1-10
·
IF 4.2
Yuan Xinyuan,Wu Tingting,Lu Teliang,Ye Jiandong
Both silicon (Si) and zinc (Zn) ions are essential elements to bone health and their mechanisms for promoting osteogenesis have aroused the extensive attention of researchers. Thereinto, the mechanism by which dual ions promote osteogenic differentiation remains to be elucidated. Herein, the effects of Si and Zn ions on the cytological behaviors of mBMSCs were firstly studied. Then, the molecular mechanism of Si-Zn dual ions regulating the osteogenic differentiation of mBMSCs was investigated via transcriptome sequencing technology. In the single-ion system, Si ion at the concentration of 1.5 mM (Si-1.5) had better comprehensive effects of cell proliferation, ALP activity and osteogenesis-related gene expression levels (ALP, Runx2, OCN, Col-I and BSP); Zn ion at the concentration of 50 μM (Zn-50) demonstrated better combining effects of cell proliferation, ALP activity and same osteogenic genes expression levels. In the dual-ion system, the Si (1.5 mM)-Zn (50 μM) group (Si1.5-Zn50) synthetically enhanced ALP activity and osteogenesis genes compared with single-ion groups. Analysis of the transcriptome sequencing results showed that Si ion had a certain effect on promoting the osteogenic differentiation of mBMSCs; Zn ion had a stronger effect of contributing to a better osteogenic differentiation of mBMSCs than that of Si ion; the Si-Zn dual ions had a synergistic enhancement on conducting to the osteogenic differentiation of mBMSCs compared to single ion (Si or Zn). This study offers a blueprint for exploring the regulation mechanism of osteogenic differentiation by dual ions. Graphical Abstract
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 10
·5822-5831
·
IF 3.9
Kang Du,Changzhi Yin,Zhengyu Zou,Mingfei Cheng,Yiyang Cai,Jiaqing Yang,Meng Zhang,Wenzhong Lu,Shengxiang Wang,Wen Lei
Novel BaCa 2 M 3 O 9 ( M = Si, Ge) microwave dielectric ceramics were prepared via solid-state reaction with sintering at 1125°C–1275°C for 5 h. Single-phase BaCa 2 M 3 O 9 ( M = Si, Ge) ceramics were obtained according to stoichiometry. The single-phase BaCa 2 Ge 3 O 9 ceramic was confirmed through Rietveld refinement and high-resolution transmission electron microscopy/selected area electron diffraction and synthesized for the first time. The BaCa 2 M 3 O 9 ( M = Si, Ge) exhibited a triclinic structure with a P 1 ¯ $\bar 1$ space group and good microwave dielectric properties. The ε r , Q × f , and τ f values of BaCa 2 M 3 O 9 ( M = Si, Ge) ceramics are mostly dominated by the relative density, ionic polarizability, relative covalence, and bond energy of M –O bond, respectively. A high Q × f value (61 800 GHz at 16.3 GHz) was obtained in BaCa 2 Ge 3 O 9 ceramic due to its high r c (Ge–O) and low intrinsic dielectric loss. The BaCa 2 Si 3 O 9 ceramic exhibited small | τ f | value (‒36.4 ppm/°C) due to its large E Si-O . Excellent microwave dielectric properties ( ε r = 8.31, Q × f = 61 800 GHz, and τ f = ‒58.7 ppm/°C) were obtained for the BaCa 2 Ge 3 O 9 ceramic.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
Research
·
2023
·
IF 11
Feng Niu,Fugong Zhou,Zhixun Wang,Lei Wei,Jie Hu,Lei Dong,Yifei Ma,Mei Wang,Suotang Jia,Xuyuan Chen,Zhaomin Tong
Traditional metal oxide semiconductor (MOS) gas sensors have limited applications in wearable devices owing to their inflexibility and high-power consumption by substantial heat loss. To overcome these limitations, we prepared doped Si/SiO2 flexible fibers by a thermal drawing method as substrates to fabricate MOS gas sensors. A methane (CH4) gas sensor was demonstrated by subsequently in situ synthesizing Co-doped ZnO nanorods on the fiber surface. The doped Si core acted as the heating source through Joule heating, which conducted heat to the sensing material with reduced heat loss; the SiO2 cladding was an insulating substrate. The gas sensor was integrated into a miner cloth as a wearable device, and the concentration change of CH4 was monitored in real time through different colored light-emitting diodes. Our study demonstrated the feasibility of using doped Si/SiO2 fibers as the substrates to fabricate wearable MOS gas sensors, where the sensors have substantial advantages over tradition sensors in flexibility, heat utilization, etc.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zheyi Zhang,Qian Wei,Fen Jiao
The efficient recovery of fine-grained lepidolite remains a critical challenge in lithium resource extraction. This study proposes a flotation method leveraging mineral dissolution, focusing on the action mechanisms of Li⁺, Al³⁺, and Si⁴⁺ ions released from lepidolite and feldspar surfaces in alkaline environments. Flotation tests confirm that dissolved ions increase the flotation recovery of lepidolite from 45.24 % to 81.34 %. Inductively Coupled Plasma (ICP), Zeta potential, laser particle size measurement, and high-speed photography demonstrate that selectively released ions induce selective particle aggregation by regulating mineral surface potentials, thereby increasing the apparent particle size. Surface tension and foam property tests show that dissolved ions reduce the surface tension of the collector solution, optimize foam stability, and enhance mineralization efficiency. This study elucidates the pivotal role of dissolved ions in fine-grained lepidolite flotation and provides new insights into interface regulation strategies for the flotation of fine silicate minerals.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Qiaoguang Li,Wei Wei,Wenqing Xiao,Yunliang Li,Zekun Chen,Guijun Xie,Yigang Wang
We have successfully developed a molecular design strategy to synthesize a hydrogenated rosin-modified isocyanatopropyltriethoxysilane crosslinking agent (HRIS) with organic and inorganic active groups. Then curing it, rosin-based silicone rubber chemically cross-linked modified pine (RSP) is formed. This process enables the organic integration of fire-retardant silicon, nitrogen elements, and the rigid hydrogenated phenanthrene ring structure of rosin with the internal and external surfaces of the pine’s porous structure through chemical bonding. In the channels, rosin-based silicone rubber with 48.81 % of carbon, 42.96 % of oxygen, and 8.23 % of silicon, respectively was observed. The degradation mechanism coupled with LOI (limiting oxygen index) testing revealed that the RSP exhibited enhanced flame retardancy, with its LOI significantly increasing from 24.68 % to 25.4 %. Additionally, it exhibited higher thermal stability up to 330℃ than pine, indicating that the fire-retardant performance of RSP was effectively enhanced through the crosslinking modification with HRIS and PDMS (hydroxyl-terminated polydimethylsiloxane). During the thermal degradation process, RSP will produce gaseous cyclic siloxane molecules such as D3 (hexamethylcyclotrisiloxane), D4 (octamethylcyclotetrasiloxane), D5 (decamethylcyclopentasiloxane), etc. This study demonstrated that a new type of adhesive has been synthesized, but the influence of byproducts on the entire system should be considered in application, which is of significance for indicating the direction.
研究领域:
高分子科学
·
材料工程
·
化学合成
·
阻燃材料
·
木材科学
·
热分析
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）