FUEL
·
2024
·
IF 6.7
Zi-Chun Fan,Zhuang Li,Xiang Bai,Xian-Yong Wei,Yierxiati Dilixiati,Qian-Qian Kong,Ji Zhao,Yong-Hui Feng,Zhi-Min Zong,Jun-Long Wang
The catalytic hydroconversion (CHC) of benzyloxybenzene (BOB) and oxydibenzene (ODB), two typical lignite-related model compounds (LRMCs) representing α-Ο-4 and 4-O-5 model linkages , have been investigated using uniformly dispersed Ni 15 /HY prepared by a three-step method. The cleavage of >CH-O- bridged bonds in BOB and partial hydrogenation of ODB are considered as a crucial first step, and the target reactions in this work are to produce complete hydrodeoxidized ring saturation products. Through the exploration of reaction mechanism, H + /H - and biatomic active hydrogen, as the main hydrogen species involved in the reaction, play an important role in the CHC of BOB and ODB. Herein, the synergic effect between the hydrogenation of nickel nanoparticles and the acidic function of Y -type zeolite improves the CHC performance, resulting in Ni 15 /HY displaying proficient catalytic activity and selectivity for the CHC of BOB and ODB. Under the optimal reaction conditions, BOB and ODB can be completely converted to cyclanes over Ni 15 /HY, and the main products are dicyclohexylmethane (57.6 %) and cyclohexane (92.4 %), respectively. The developed Ni 15 /HY can not only promote the hydroconversion of BOB and ODB to produce ring-saturated products, but also undergo the rearrangement reaction to produce two- or three-ring cyclanes, which is desirable to upgrade LRMCs to high-density hydrocarbon fuels .
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jun-Min Zhang,Xiao-Wu Chen,Xiao You,Qing-Gang Li,Meng-Meng Wang,Xiang-Yu Zhang,Yan-Mei Kan,Yu-Dong Xue,Shao-Ming Dong
The effect of RE 2 O 3 (RE = La, Y, Er, Lu) on the oxidation behavior of RMI-SiC ceramics in air and wet oxygen atmospheres at 1400 °C were studied. The outward migration of RE 3+ cations reduces the oxidation resistance of SiC-RE ceramics in air, but improves the wet-oxidation resistance of SiC-RE ceramics due to the formation of denser RE 2 Si 2 O 7 layer. The outward migration rates of RE 3+ cations may be influenced jointly by the RE 3+ cation radius and the formation rate of RE 2 Si 2 O 7 . The higher mobility of Er 3+ and Y 3+ cations makes Y 2 O 3 and Er 2 O 3 promising modifier for enhancing the wet-oxidation resistance of RMI-SiC f /SiC composites, although the modified components need to be optimized and further analyzed in a more realistic service environment.
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JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Jiantong Wang,Changshuai Gong,Sihan Yang,Qi Zhu,Xuejiao Wang,Ji-Guang Li
Phosphor-converted near-infrared light-emitting diodes (NIR pc-LEDs) are finding applications in various fields including food quality analysis, biomedical imaging, night vision, and biomedicine. The crucial factor in the development of NIR pc-LEDs devices lies in the advancement of high-performance broadband NIR phosphors. In this work, novel Cr 3+ -activated silicate phosphors NaRESi 3 O 9 (RE = Y, Lu, Sc) are reported. This silicate has a special 3D network structure in which RE has four different sites, forming four octahedrons and providing suitable occupation sites for Cr 3+ . The phosphors demonstrate a wide emission spectrum ranging from 750 to 1450 nm when excited by light at 468 nm. The full width at half maximum (FWHM), which benefits from the presence of Cr 3+ ions occupying multiple sites, is measured to be 203 nm. Notably, the strongest emission peak is observed at a longer wavelength of 984 nm compared to most other systems activated by Cr 3+ . The Na 3 ScSi 3 O 9 lattice provides a weak crystal field ( Dq / B = 1.97) and weak phonon-photon coupling for Cr 3+ , and the integrated emission intensity of Na 3 ScSi 3 O 9 :0.03Cr 3+ is 4.66 times stronger than that of Na 3 YSi 3 O 9 :0.03Cr 3+ .
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高影响因子
ANALYST
·
2019
·Vol. 144
·期 10
·3389-3397
·
IF 4.019
Jingfeng Wang,Yu Wang,Su Liu,Haiwang Wang,Xue Zhang,Xiaolei Song,Jinghua Yu,Jiadong Huang
DNA can be configured into unique high-order structures due to its significantly high programmability, such as a three-way junction-based structure (denoted Y-shaped DNA), for further applications. Herein, we report a label-free fluorescent signal-on biosensor based on the target-driven primer remodeling rolling circle amplification (RCA)-activated multisite-catalytic hairpin assembly (CHA) enabling the concurrent formation of Y-shaped DNA nanotorches (Y-DNTs) for ultrasensitive detection of ochratoxin A (OTA). Two kinds of masterfully-designed probes, termed Complex I and II, were pre-prepared by the combination of a circular template (CT) with an OTA aptamer (S1), a substrate probe (S2) and hairpin probe 1 (HP1), respectively. Target OTA specifically binds to Complex I, resulting in the release of the remnant element in S2 and successive remodeling into a mature primer for RCA by phi29 DNA polymerase, thus a usable primer-CT complex is produced, which actuates primary RCA. Then, numerous Complex II probes can anneal with the first-generation RCA product (RP) with multiple sites to activate the CHA process. With the participation of endonuclease IV (Endo IV) and phi29, HP1 as a pre-primer containing a tetrahydrofuran abasic site mimic (AP site) in Complex II is converted into a mature primer to initiate additional rounds of RCA. So, countless Y-DNTs are formed concurrently containing a G-quadruplex structure that enables the N-methylmesoporphyrin IX (NMM) to be embedded, generating remarkably strong fluorescence signals. The biosensor was demonstrated to enable rapid and accurate highly efficient and selective detection of OTA with an improved detection limit of as low as 0.0002 ng mL−1 and a widened dynamic range of over 4 orders of magnitude. Meanwhile, this method was proven to be capable of being used to analyze actual samples. Therefore, this proposed strategy may be established as a useful and practical platform for the ultrasensitive detection of mycotoxins in food safety testing.
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2016
·
IF 4.82
Hui Yang,Chun-Li Hu,Jiang-Gao Mao
The first examples of mixed-anion lanthanide galloborates, namely, Ln2Ga[B3O6(OH)]2[B7O9(OH)2](CH3CO2)2 [Ln = Y (1), Sm (2), Eu (3), Gd (4), Dy (5)], have been obtained through hydrothermal synthesis. The title compounds are isomorphic and belong to monoclinic space group C2/c (No. 15). Their structures possess [B7O13(OH)2] borate layers further bridged with [B3O7] clusters to give a three-dimensional (3D) borate framework displaying two types of rhombus-like B14O14 14-membered-ring (14-MR) channels along the b axis. The Ga3+ ions are octahedrally coordinated and located at one end of the B14O14 14-MR channels, forming small tunnels of B7Ga 8-MRs, which are filled by the LnIII ions. The Ln ions and Ga cations are further held together by bridging acetate anions. It is worth noting that in these compounds there are two different types of borate clusters and two types of anions that are uncommon in the borates reported. Luminescent studies revealed the characteristic emission bands of Ln ions for compounds 2–5, and the luminescent lifetimes are 3.6, 0.86, and 3.05 ns for compounds 2, 3, and 5, respectively. Magnetic measurements suggest that there are antiferromagnetic interactions between magnetic centers for compounds 2–5.
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高影响因子
Catalysts
·
2020
·Vol. 10
·期 4
·373
·
IF 3.52
Junjiao Zhang,Zhengru Zhu,Junchao Jiang,Hong Li
AgI/MFeO3/g-C3N4(M = Y, Gd, La) nano sheet–sphere–sheet photocatalysts were synthesized by a simple ultrasound-assisted hydrothermal approach. We characterized the microstructure, surface morphology, and optical absorption capacity of the obtained samples. According to the characterization results, AgI/MFeO3/g-C3N4(M = Y, Gd, La) nano sheet–sphere–sheet photocatalysts were successfully obtained. MFeO3nanospheres and AgI nanosheets were dispersed evenly on the surface of g-C3N4nanosheets. AgI/MFeO3/g-C3N4showed remarkable photocatalytic. Especially, 95% of NOF was photodegradated over AgI/LaFeO3/g-C3N4within 3 h and the higher photocatalytic performance still remained after six cycles. Additionally, The N2adsorption–desorption isotherms of AgI/MFeO3/g-C3N4showed that AgI/LaFeO3/g-C3N4possessed the highest specific surface area (79.32 m2/g). The result of scavenging experiment revealed that ·O2−, h+, and ·OH were the main roles in the photodegradation process. Benefitting from the nice energy band matching, MFeO3acted as the center of photogenerated electrons migration and separation provided more direct electron channels. This work proposes an effective approach for the design and configuration of dual Z-scheme photocatalysts to accomplish the removal of organic contaminants based on g-C3N4.
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高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 10
·1801687
·
IF 7.125
Jialun Tang,Fei Li,Gaoling Yang,Yong Ge,Zhaohan Li,Zhiguo Xia,Huaibin Shen,Haizheng Zhong
Gradient-alloyed Cd x Zn 1− x Se y S 1− y @ZnS core shell quantum dots are the most popular materials used in light-emitting diodes for liquid crystal display backlights. High-temperature photoluminescence is an essential property in determining the chromaticity shifts of on-chip type devices. In this work, the photoluminescence quenching effect of Cd x Zn 1− x Se y S 1− y @ZnS quantum dots is investigated by measuring the steady and time-resolved PL spectra at elevated temperatures. The thermal quenching of Cd x Zn 1− x Se y S 1− y @ZnS quantum dots can be explained by a thermally activated physical process, including electron resonance tunneling into pre-existing surface trap states, injection over the barrier energy back to the core, and recombination with the confined holes. By combing the theoretical analysis and experimental results, the influence of core composition and shell thickness of Cd x Zn 1− x Se y S 1− y @ZnS QDs on the quenching effect is illustrated. It is found that the integrated photoluminescence intensity of ZnSe-rich quantum dots with 20 monolayers ZnS shell at 500 K can reserve 85.1%, relative to the value at 300 K. Quantum dots with enhanced photoluminescence emission at high temperature enable the fabrication of light-emitting diodes with reduced chromaticity shifts.
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高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Jialun Tang,Sheng Huang,Zhaohan Li,Huaibin Shen,Zhao Lv,Haizheng Zhong
In this work, we reported the morphology evolution (formation of voids & size reduction) of gradient-alloyed CdxZn1–xSeyS1–y@ZnS quantum dots under electron irradiation during transmission electron microscopy observation. By investigating the correlations between shell gradients and morphology evolution, the formation of voids can be explained by the continuous electron irradiation-induced atomic movement under interfacial strain. On the other hand, the size reduction can be attributed to the elastic scattering-enabled sputtering of surface atoms. The as-formed voids of CdxZn1–xSeyS1–y@ZnS quantum dots with CdS-rich cores are much larger than those of ZnSe-rich ones, and the sizes of voids decreased with the increasing of shell thickness. The comparison of the morphology evolution of CdxZn1–xSeyS1–y@ZnS core–shell quantum dots with different composition gradients demonstrated that the size and shape of as-formed voids illustrate the strain characteristics of shell gradient. This provides a guideline to understand the strain effects in gradient-alloyed core–shell quantum dots through transmission electron microscopy measurement. We believe the deep insights into gradient-alloyed CdxZn1–xSeyS1–y@ZnS core–shell quantum dots would push forward their optimization toward commercialized light-emitting technology.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jianyan Ding,Dewu Wu,Shanshan Ye,Quansheng Wu
The advancement of narrow-band cyan-emitting phosphors activated by near-ultraviolet LED chips is crucial for creating high-efficiency, health-promoting WLED lighting. Guided by a single and symmetrical crystallographic site, a near-ultraviolet excitation, near-narrow-band, and thermally stable cyan light emission was achieved from Bi 3+ -activated garnet-structured Ca 3 Xn 2 Ge 3 O 12 :Bi 3+ (Xn = Sc, Y, Lu). When incorporated into WLEDs, the color rendering index (CRI) of devices containing Ca 3 Sc 2 Ge 3 O 12 :Bi 3+ cyan phosphor reaches 92.8, indicating potential value for healthy lighting applications. Furthermore, by integrating spectral and crystallographic data with empirical formula calculations, a comprehensive analysis of the luminescence behavior among the three Ca 3 Xn 2 Ge 3 O 12 :Bi 3+ (Xn = Sc, Y, Lu) phosphors were performed. This analysis was designed to elucidate the similarities and differences in their luminescence properties, as well as to uncover the underlying mechanisms responsible for the near-narrow-band emission of Bi 3+ . The results indicate that under the combined influence of factors volume polarization, fractional covalency, and charge of the anions, Ca 3 Xn 2 Ge 3 O 12 :Bi 3+ (Xn = Sc, Y, Lu) exhibits the same strongest excitation peak. However, due to variations in Stokes shift and bandgap, the three phosphors exhibit distinct emission peaks and thermal quenching properties. This study aims to establish fundamental principles for the development of Bi³ ⁺-activated narrow-band emission phosphors.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 52
·期 1
·1122-1131
·
IF 5.6
Yuyu Chen,Weiliang Li,Jingyu Zhang,Xiaomin Cheng,Jiaojie Xiao,Kaiwen Zhou,Wenwei Wu,Xuehang Wu
The practical application of O3-type layered oxide cathode materials in sodium-ion batteries is limited by their insufficient structural stability and poor interfacial compatibility, especially under high-voltage operation. In this work, a thin Y 2 O 3 coating is applied to the surface of Na 0.9 Cu 0.12 Ni 0.33 Mn 0.42 Ti 0.13 O 2 (CNMT). During high-temperature annealing, partial diffusion of Y 3+ ions into the CNMT lattice results in an expansion of the interlayer spacing within the sodium layer and a reduction in lattice oxygen vacancies. Owing to the stabilized Y 2 O 3 -modified interface and improved structural integrity, the CNMT modified with 2 wt% Y 2 O 3 (CNMT-2Y) demonstrates superior cycling performance in the voltage range of 2.2–4.3 V. Specifically, in a half-cell configuration, CNMT-2Y delivers an initial discharge capacity of 130.9 mAh g −1 and maintains 94.35 % of its capacity after 100 cycles at a current density of 100 mA g −1 . After being exposed to ambient air for 10 days, the material still retains 89.62 % of its capacity over 100 cycles under the same conditions, significantly outperforming the pristine CNMT (83.54 %). In a full-cell setup with hard carbon (HC) as the anode, CNMT-2Y provides an initial discharge capacity of 119.5 mAh g −1 and retains 77.14 % of its capacity after 150 cycles at 100 mA g −1 within 1.5–4.2 V. This facile dual-modification strategy shows promising potential for promoting the commercialization of O3-type layered oxide cathode materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Hardy Shuwanto,Hairus Abdullah,Dong-Hau Kuo,Noto Susanto Gultom
Y-doped Zn(O,S) nanocatalysts with different Y amounts have been fabricated, characterized, and applied for photocatalytic hydrogen evolution reaction (HER) and hydrogenation reaction (PHR) to reduce nitro groups and to cleave azo (N N) bond. The oxysulfide formation was confirmed by XRD, SAED, and DRS analyses. The best Y-doped Zn(O,S) could evolve hydrogen by 3,946 μmol g −1 h −1 in aqueous solution with ethanol as a hole scavenger reagent. The PHR of 5% Y-doped Zn(O,S) could hydrogenate 4-nitrophenol to 4-aminophenol and nitrobenzene to aniline in 120 and 90 min, respectively in a low-power UV light illuminated condition (16 W) as confirmed with UV–Vis spectroscopy. Besides of that, a sluggish cleavage of N N bond in azobenzene could be totally done to yield aniline within 30 min. Lastly, the detail mechanisms of HER and PHR including their molecular chemisorption phenomena were proposed and described with the steps of solvation , adsorption, pinning, and surface hydrogenation reactions.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Junyi Wu,Yao Liu,Dongwei Zhu,Jianxing Xu,Jian Yun
A DSN-triggered Y-shaped dual-circular-probe DNA walker is developed for RCI-associated miR-29a detection. • The Y-shaped steric hindrance structure effectively suppresses non-specific DSN cleavage, ensuring ultralow background. • The cascade amplification strategy achieves a detection limit as low as 0.26 fM for miR-29a. • The ICP-MS-based Rh readout provides label-free, photobleaching-free, and robust quantification. • The method exhibits excellent single-base mismatch discrimination and reliable performance in serum and cell samples. Rotator cuff injury (RCI) is a prevalent musculoskeletal disorder with limited early diagnostic options, partly due to the lack of sensitive and non-invasive biomarkers. Magnetic resonance imaging (MRI), the current mainstream imaging tool for RCI, suffers from high cost, limited accessibility, and an inability to reflect molecular-level pathological changes before structural damage becomes evident. MicroRNAs (miRNAs) have shown promise as diagnostic indicators, yet their reliable detection in clinical contexts requires methods with ultrahigh sensitivity and single-base resolution. Here, we report a duplex-specific nuclease (DSN)-triggered DNA walker with dual circular probes for highly specific and ultrasensitive analysis of RCI-associated miR-29a by inductively coupled plasma mass spectrometry (ICP-MS). The DNA walker is assembled on magnetic beads, where the walking track comprises two circular probes (c1 and c2) forming a Y-shaped steric hindrance structure that effectively suppresses non-specific DSN cleavage, ensuring an ultralow background. Upon target miR-29a hybridization, DSN specifically cleaves the DNA–RNA hybrid, initiating a cascade amplification involving self-priming, nicking/polymerase cycling, rolling circle amplification, and DNAzyme-mediated cleavage of a rhodium-labeled substrate. The released rhodium is quantified by ICP-MS, providing a photobleaching-free readout. The proposed method achieves a detection limit as low as 0.26 fM with outstanding single-base mismatch discrimination, a wide dynamic range from 1 fM to 100 pM, excellent recoveries in serum (93.2–103.2%), and high correlation with RT-PCR (R 2 = 0.9912) in real cell line samples. This DSN-triggered DNA walker offers a robust, sensitive, and specific platform for RCI-related miRNA detection, holding great promise for early diagnosis and prognosis monitoring of rotator cuff injuries. Download: Download high-res image (78KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）