Catalysts
·
2022
·Vol. 12
·期 9
·955
·
IF 4.501
Beilei Cui,Hua Wang,Qingfeng Ge,Xinli Zhu
A series of rutile TiO2-supported Ni catalysts with varying Ni sizes were prepared and reduced at 650 °C to explore the effect of Ni size on the strong metal–support interactions (SMSI) and its consequences on the hydrodeoxygenation (HDO) of m-cresol at 350 °C and atmospheric pressure. When the Ni size increases from 4 to 29.1 nm, the SMSI becomes stronger, e.g., the thickness of the TiOxoverlayer and the coverage extent of TiOxon the Ni particle surface increase. Direct deoxygenation to toluene is the dominant pathway on Ni/TiO2catalysts with varying Ni loadings, with almost no CH4being formed. These results indicate that the TiOxoverlayer significantly alters the property of Ni. That is, the C-C hydrogenolysis activity on bare Ni is completely inhibited due to SMSI, while the deoxygenation activity is improved at the Ni-TiOxinterfacial perimeter sites. Meanwhile, the turnover frequency of HDO on small Ni particles of 4 nm is > 2 times higher than that on large Ni particles of 29.1 nm, indicating that the small Ni particle with moderate SMSI appears to be optimal for the direct deoxygenation of m-cresol to toluene. The results suggest HDO activity may be enhanced by tuning the metal particle size and SMSI degree.Keywords:Ni/TiO2;rutile;strong metal-support interactions;m-cresol;hydrodeoxygenation
研究领域:
催化
·
化学工程
·
材料科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Jun Wang,Jie Ou,Xueni Sun,Xiangjun Tong,Ben Gao,Chunxiang Huang,Hui Shao,Yixin Leng
Measurements of isobaric vapor–liquid equilibrium (VLE) results for binary systems of m-cresol (MC) + diisopropanolamine (DIPA) and 2,6-dimethylphenol (DMP) + DIPA and the ternary system of MC + DMP + DIPA were conducted at the pressure of 20.0 kPa. The binary VLE experimental data showed that DIPA had stronger interaction with MC than DMP. The ternary system experimental VLE data showed that DIPA could improve the relative volatility of DMP to MC. The binary experimental data were checked by using Herington area and point test methods, and the checked results were thermodynamically consistent. Meanwhile, the VLE data were correlated by Wilson, nonrandom two-liquid, and universal quasichemical models, and the binary energy interaction parameters for these models were obtained. These activity coefficient models were used to predict the ternary system VLE data. The predictive results suggested that the Wilson model had the best prediction.
研究领域:
化学工程
·
物理化学
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DOI
高影响因子
Environmental Science-Advances
·
2022
·Vol. 1
·期 3
·365-379
·
IF 0
Wenli Qin,Xinyi Zhang,Zefei Chen,Xueya Liu,Manqing Ai,Pingping Zhang,Ying Ye,Zengling Ma
Meso–macroporous MFe2O4@CMT (M = Ni, Co) catalysts were synthesized by coating carbon microtubes (CMTs) employing a calcination method. The obtained materials NiFe2O4@CMT (PCNF) and CoFe2O4@CMT (PCCF) were characterized via X-ray powder diffraction (XRD), pore structure analysis, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The electromagnetic (EM) wave absorption of catalysts was measured and it was found that the maximum reflection loss value of PCCF and PCNF was about −41.50 dB at a thickness of 1.85 mm and −24.70 dB at a thickness of 6.55 mm, respectively. The composite catalysts were prepared for the microwave (MW)-induced Fenton-like catalytic degradation of dimethyl phthalate (DMP). The microwave catalytic activity of PCNF was higher than that of PCCF, which was closely related to its higher concentration of active species, better microwave-absorbing ability and high interaction between NiFe2O4 and CMT. Moreover, the degradation kinetics could be well-fitted by the pseudo-first-order kinetic model. With an increase in the MW power, initial pH, catalyst dosage, and H2O2 concentration, the DMP degradation rate initially increased and then decreased, while it declined continuously with an increase in the initial DMP concentration. The introduction of metal oxides increased the mobility of the surface oxygen, playing a crucial role in the generation of surface oxygen species. The catalysts maintained high stability after five reaction cycles. The overall findings provide new insight into PCCF and PCNF under MW irradiation for the degradation of DMP and other relevant organic pollutants.
研究领域:
环境科学
·
催化材料
·
化学工程
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DOI
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 2
·1985-2000
·
IF 1.5
Zhe Zhang,Le Ruan,Weipeng Zhang,Yuzeng Lyu,Wei Shang,Yuqing Wen,Xiuying Li,Ling Wu,Yanni Jiao
The triazol-3-ylamine and three different kinds of Schiff base compounds are self-assembled on bronze surface. Electrochemical impedance spectroscopy and potentiodynamic polarization measurements show that the triazol-3-ylamine and Schiff base self-assembled films can protect bronze from corrosion in 0.5 M HCl solution. The corrosion efficiency increases with the self-assembly time increasing and reaches a stable value after 8 h. The highest corrosion efficiency of the bronze electrode modified with self-assembled films reaches 95.81% after immersing in 0.005 M 2,4-Dibromo-6-[(4H-[1,2,4]Triazol-3-ylimino)-methyl]-phenol Schiff base solution for 10 h. X-ray photoelectron spectroscopy and scanning electrochemical microscope are used to characterize the inhibitive ability of the self-assembled films. Quantum chemical calculations and dynamic simulations indicate that the triazol-3-ylamine and Schiff bases molecules can absorb on the copper surface via chemisorption. The adsorption energy increases with the number of aromatic rings.
研究领域:
材料腐蚀与防护
·
物理化学
·
表面科学
·
电化学
·
计算化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 47
·期 4
·4831-4837
·
IF 3.83
Yu Wang,Ying Tang,Jie Li,Weishuang Fang,Shiyao Shen,Feihu Li,Lian Duan,Ming Qin,Liang Fang
The Ca 3 M 2 Si 3 O 12 (M = Yb, Y) ceramics with orthorhombic silico-carnotite structure were fabricated via high-energy ball milling and solid-state reaction route. Dense Ca 3 Yb 2 Si 3 O 12 and Ca 3 Y 2 Si 3 O 12 ceramics sintered at 1260 °C and 1240 °C revealed promising microwave dielectric properties with ε r = 9.2 and 8.7, Q×f = 56,400 GHz and 29,094 GHz, τ f = −77.5 ppm/°C and −76.8 ppm/°C, respectively. The connection between crystal structure and Q×f values of Ca 3 M 2 Si 3 O 12 (M = Yb, Y) ceramics was discussed with respect to the packing fraction, and their intrinsic microwave dielectric properties were examined using the infrared reflectivity spectra analysis. The thermal stability of Ca 3 Yb 2 Si 3 O 12 was improved successfully by forming 0.91Ca 3 Yb 2 Si 3 O 12 ‐0.09CaTiO 3 composite ceramics with τ f = +2.9 ppm/°C, ε r = 12.93 and Q×f = 26,729 GHz.
研究领域:
材料科学
·
陶瓷
·
微波材料
·
固态化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Renze Zhang,Hanyang Ji,Zhiqiang Yang,Huai Wang,Fangling Zhou,Guanchao Li,Zhijia Liao,Mengran Ran,Hongmin Zhu,Tianyao Qi,Zhenyu Yuan,Yanbai Shen,Fanli Meng
Triethylamine (TEA), a hazardous industrial volatile organic compound, requires sensors with rapid response and ppb-level sensitivity. This study synthesized m-LaVO 4 nanospheres with controlled exposed crystal facets via a hydrothermal method. The optimized material, featuring a layered morphology and dominant (200) plane, showed a high response of 27.2 to 100 ppm TEA at 225°C with a 5 s response time, shortening to 2 s at 15 ppm. The sensor demonstrated a low detection limit of 1 ppb, excellent selectivity, repeatability, long-term stability, and light-modulated sensing behavior. These properties are attributed to the unique layered structure and surface characteristics of m-LaVO 4 , making it a promising candidate for efficient, low-concentration TEA detection.
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产品关联
DOI
高影响因子
ACS Catalysis
·
2026
·Vol. 16
·期 15
·14279-14290
·
IF 13.6
Zhang Haotian,Wang Yuhan,Wang Dashuai,Xu Shiqiang,Gao Xiaofeng,Ma Zixuan,Zhou Xian,Yang Yingjie,Hou Zepeng,Ding Chuanmin,Wang Junwen,Su Dong,Yao Siyu
The BO x overlayer, promoted by a subsurface metal promoter in the M@BO x core–shell configuration, exhibits high activity and selectivity in the low-temperature oxidative dehydrogenation of propane (ODHP). However, the inverse interfacial interactions between metal and the BO x overlayer remain incompletely understood. In this study, we present a bottom-up synthetic strategy for fabricating Ru@BO x inverse catalysts with tunable boron oxide overlayer thickness by varying CO 2 concentrations during the oxidation etching process. The results demonstrate a pronounced BO x shell thickness-dependence of the low-temperature ODHP performance of Ru@BO x /BN catalysts. The promotional effect of subsurface metal lies in enhancing the density of hydroxylated BO x active sites and modulating the electronic structure of the BO x overlayer via electronic interfacial interactions. The promotion is confined to the bottom few layers of BO x on Ru NPs and decreases rapidly with increasing shell thickness.
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Qujia Xiang,Chen Cheng,Fanli Zeng,Shuhao Dong,Yan Li,Xuanrao Yu,Ya Chen,Qihou Li,Yuxuan Liu,Jiuqing Liu
Lithium‑sulfur batteries are promising energy storage systems but remain limited by the poor thermal stability and severe polysulfide shuttle effect associated with conventional polyolefin separators. Herein, a porous poly(m-phenylene isophthalamide) (PMIA) separator was fabricated via an isopropanol (IPA)-induced phase separation strategy to regulate pore structure and ion transport behavior, in which polyvinylpyrrolidone (PVP) served as a bifunctional additive for pore formation and physical crosslinking regulation. Compared with rapid water-induced phase separation, the delayed demixing process induced by IPA promoted the formation of a uniform sponge-like porous architecture with improved pore connectivity and electrolyte affinity. Benefiting from the interconnected nanoporous framework, polar amide groups, and the synergistic effect of PVP-regulated pore structure, the optimized PMIA separator exhibited enhanced ionic conductivity, increased Li + transference number, strong polysulfide adsorption capability, and excellent thermal dimensional stability. Consequently, the assembled lithium‑sulfur batteries delivered improved rate capability and stable long-term cycling performance, maintaining a reversible capacity of 540 mAh g −1 after 200 cycles at 0.2C and 420 mAh g −1 after 300 cycles at 1C. This work provides an effective strategy for constructing thermally stable aramid separators for safe and high-performance lithium‑sulfur batteries.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Shifan Lu,Qiang Fan,Yingli Liu
For self‑biased circulators, oriented Ba 1-x La x Fe 12-x Al x O 19 (x = 0.1–0.5) hexaferrites were fabricated by solid‑state reaction. Partial substitution of Ba 2+ by La 3+ and Fe 3+ by Al 3+ progressively contracts the lattice, increases grain size, and induces local lattice distortion, evidenced by Raman peak shifts and broadening. Magnetic properties evolve in two distinct trends: remanence and coercivity decrease monotonically; saturation magnetization M s , anisotropy constant K 1 , and anisotropy field H a increase to a peak at x = 0.4 ( M s = 78.91 emu/g, H a = 12.94 kOe) and then decline. The non‑monotonic M s arises from competition between magnetic dilution by Al 3+ and La 3+ ‑induced lattice contraction that enhances superexchange interactions. The M r / M s decrease is dominated by the weakening of exchange coupling due to non-magnetic Al 3+ substitution, with additional contributions from grain growth-induced multi-domain formation. The enhanced H a originates from lattice contraction strengthening spin‑orbit coupling at the 2b site, with the decline at x > 0.4 correlated with Raman‑detected local disorder accumulation. Through a finely-resolved composition gradient (∆x = 0.1), this study decouples the competing mechanisms and identifies the optimal composition at x = 0.40, underscoring the value of fine compositional tuning for precise property optimization. This work provides a systematic understanding of the competing mechanisms that determine the magnetic performance, offering guidance for composition design of oriented hexaferrites for self‑biased circulator applications.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Suzhen Kang,Zhiqin Wen,Jiyuan Huang,Gaoxiang Wei,Yunming Lv,Jun Peng,Xiwen Qin,Yuhong Zhao
This study synthesizes single-phase high-entropy rare-earth chromates (M 0.2 La 0.2 Eu 0.2 Nd 0.2 Gd 0.2 )CrO 3 (M = Dy, Ho, Er) (HE-RECs) via a solid-state reaction guided by a high-entropy strategy. Their crystal structure, microstructure and magnetic properties are systematically investigated. Results show that all samples crystallize into a dense, single orthorhombic perovskite phase (space group Pbnm ) after sintering at 1350 °C for 48 h. Chemical disorder and local lattice distortion at A-site induce lattice strain and Cr 3+ /Cr 6+ mixed-valence states, forming a unique local structure. This structure effectively modulates the Cr 3+ -O 2- -Cr 3+ super-exchange/Dzyaloshinskii-Moriya (DM) interactions, as well as the f - d coupling between rare-earth ions and the Cr 3+ sublattice by altering CrO 6 octahedral connectivity. Dy-LENGCO exhibits the best total magnetic characteristics: The highest Curie temperature ( T C = 90.65K), the highest saturation magnetism ( M s = 61.44 emu/g) and the best coercivity ( H c = 310.08 Oe). This benefit is related to the high intrinsic magnetic moment of Dy 3+ ions and its magnetocrystalline anisotropy, which allow the effective pinning of domain walls within the distorted lattice. The high coercivity ( H c ) of Dy-LENGCO suppresses the reversal of magnetic moments from thermal fluctuations. This property enables long-term data storage at elevated temperatures, positioning the samples as a candidate for next-generation storage media.
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DOI
高影响因子
Laser & Photonics Reviews
·
2025
·Vol. 19
·期 12
·2402164
·
IF 10
Fengyang Ma,Kaixin Liu,Zhongyao Yan,Liang Yu,Yanru Yang,Wuyan Zhao,Feilong Wang,Yaohua Li,Shuyu Zhang,Songyou Wang,Jian Sun,Ming Lu
Silicon (Si) light source has profound significance in monolithic integrated Si photonics. However, its luminance remains too low to meet practical use that usually requires > 10000 cd m⁻ 2 . Here, an all-inorganic Si nanocrystal (SiNC) white light-emitting diode (WLED) with a continuous emission spectrum spanning ≈400–900 nm in wavelength, is reported. The architecture of the WLED comprises front electrode of Ag grids and transparent-conducting-oxide/electron transport layer (ETL) of ZnO/front charge confinement layer (CCL) of SiO 2 /active layer of low-resistivity SiNC composite thin film/rear CCL of SiO 2 /hole transport layer (HTL) of MoO 3 /textured p-Si substrate/rear electrode of aluminum/heat radiator. The main procedures for achieving high luminance here include combined applications of high-pressure ammonia passivation of the active layer, which enhances its photoluminescence quantum yield significantly, and texturing of p-Si substrate, which boosts the light extraction and charge injection effectively. With an optimized combination of passivation and texturing, luminance of 10751 cd m⁻ 2 is achieved with external quantum efficiency (EQE) of 0.26%. After a Peltier cooler is further applied, luminance of 12363 cd m⁻ 2 is attained with EQE of 0.30%. Following further technical iterations, this highly bright SiNC WLED shall find applications in monolithic integrated Si photonics and even Si general lighting.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Yu Ma,Bin Zhao,Zhihua Xu,Zhihan Niu,Zhenghong Xu,Tongtong Zhang,Min Zhang,Jiaqi Chen,Guozhen Yan,Tin Zhou,Feng Shi
The performance of nucleic acid dye for staining and labelling nucleic acid molecules directly determines the effectiveness of nucleic acid detection. The widely used traditional nucleic acid dyes pose economic and environmental challenges due to their high price, high toxicity, and long dyeing time. Therefore, we propose the synthesis of m -phenylenediamine carbon dots for use as nucleic acid dye in agarose gel electrophoresis to achieve efficient visualization of DNA and RNA. The prepared carbon dots emit blue, green, yellow, and white fluorescence, diversifying the nucleic acid dye colour selection. We studied the interactions between the carbon dots and ctDNA by Ultraviolet–visible light spectroscopy, Fourier transform infrared spectroscopy and circular dichroism spectroscopy, finding that interaction occurs mainly through groove binding, accompanied by a slight electrostatic interaction. Notably, the sensitivity of the prepared carbon dot nucleic acid dye for nucleic acid detection reached 10 ng/μL comparable to traditional nucleic acid dye sensitivity.
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产品关联
DOI
PubMed
高影响因子
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