Journal of Materials Chemistry A
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2026
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IF 9.2
Haijiao Kong,Han Zhao,Zhenbao Zhang,Yu Zhang,Junjie Zhu,Qinglin Li,Heqing Jiang,Jiawei Zhu
Electrocatalytic CO2 reduction to formic acid is a promising route for mitigating CO2 emissions and producing value-added chemical feedstocks. However, achieving industrially relevant activity and stability in acidic media remains challenging due to severe hydrogen evolution, catalyst corrosion, and structural degradation. Herein, we report a rare–earth yttrium-doped SrSnO3 perovskite oxide (SrSn0.7Y0.3O3) synthesized via a solid-state reaction method. The incorporation of YO6 octahedra induces in situ electrochemical reconstruction of SnO6 units into metallic Sn, leading to the formation of strong YO6–Sn interfacial interactions that modulate the electronic structure of Sn active sites and enhance their structural stability. The optimized reconstructed catalyst, denoted as c–SrSn0.7Y0.3O3, delivers a Faradaic efficiency of over 90% for formic acid at an industrially relevant current density of 200 mA cm-2 under acidic conditions, while maintaining outstanding operational durability for over 180 h without observable performance decay. Mechanistic investigations reveal that the strong interaction between in situ generated metallic Sn and YO6 units effectively suppresses Sn dissolution and crystal structural collapse, thereby ensuring long-term stability in acidic media. This work demonstrates a rare-earth doping and electrochemical strategy that achieves a well-integrated balance of activity, selectivity, and stability, offering a promising pathway for advancing acidic CO2 electroreduction toward industrial application.
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BIOSENSORS & BIOELECTRONICS
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2026
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IF 11.8
Binnan Shi,Zhuangzhuang Ru,Dehao Jia,Yu Du,Lihua Hu,Shuyuan Liu,Shan Wang,Hongying Jia,Qin Wei
An ultrasensitive electrochemiluminescence (ECL) biosensor was developed for the detection of the acute myocardial infarction (AMI) biomarker miRNA-499 by synergistically integrating an iridium-metallized covalent organic framework (Ir@TpBpy) with enzyme-assisted Y-shaped DNA amplification. The Ir@TpBpy COF was synthesized via post-metallization of a bipyridine-rich TpBpy framework with Ir(III) complexes. This design significantly enhances the ECL performance not only through material loading but also via a synergistic optimization strategy: (1) the conjugated framework constructs continuous charge transport pathways to accelerate electron transfer; and (2) the porous architecture induces a guest confinement effect that locally enriches the coreactant triethylamine (TEA), facilitating radical kinetics. Concurrently, a Y-shaped DNA amplification strategy, driven by Klenow fragment and Nt. Bbv Cl enzymes, facilitated exponential signal enhancement via cascade strand displacement reactions. The generated output strands triggered the displacement of pre-immobilized WO 3 /CuO quenchers from the electrode surface, thereby restoring the luminescence of Ir@TpBpy and achieving a sensitive “signal-on” readout. Benefiting from this dual-amplification approach, the biosensor achieved an exceptionally low limit of detection (LOD) of 0.81 aM across a linear range from 1 aM to 1 nM in human serum and cellular lysates. Clinical validation using Bland-Altman analysis demonstrated 95% agreement with qRT-PCR results, confirming that this synergy of coordination modulation and guest confinement offers a robust and precise platform for early AMI diagnosis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Jingjing Wang,Zhihui Wen,Xinjie Wei,Jiancheng Wang,Junjie Liao,Liping Chang,Kechang Xie
Copper-based sorbents for adsorption desulfurization have attracted significant interest owing to their potential for high sulfur adsorption capacities. However, their practical application has been severely impeded by the ambiguous active-site structures and, more critically, a drastic loss of capacity in the presence of competing aromatic compounds. This performance bottleneck stems from the lack of electronic specificity in conventional Cu sites to differentiate thiophene from benzene, which leads to unselective adsorption. Herein, we address these challenges by constructing a well-defined single-atom sorbent through a one-pot seeding strategy that precisely anchors Cu 1 O pairs in the supercages of hollow Y zeolite, forming a stable Cu 1 -O 4 -Al 2 bridging configuration. Desulfurization experiments performed using pure benzene as the solvent show that the hollow Cu@Y zeolite achieved a record-breaking sulfur breakthrough capacity of 0.99 mmol/g with 12-fold improvement over conventional Cu Y zeolite, representing state-of-the-art performance among reported copper-based sorbents even under such strongly competitive conditions. After five regeneration cycles, the sorbent still maintained a high adsorption capacity. This Cu 1 -O 4 -Al 2 structure induces a tailored electronic environment where the Cu center becomes highly electron-deficient due to significant charge transfer (1.71|e|) to framework oxygen atoms. As a result, the Cu 1 -O 4 site strongly adsorbs thiophene (−106.8 kJ/mol) via σ-coordination in an η 1 (C) mode (Cu C distance: 2.17 Å), further stabilized by a secondary interaction between the sulfur atom and a framework oxygen (S O distance: 3.02 Å), resulting in a unique “bidentate anchoring” adsorption configuration. Crucially, the highly electron-deficient nature of the Cu centers prevents effective π-complexation with benzene due to insufficient back-donation capability, thereby suppressing competitive aromatic adsorption through electronic repulsion. In situ Fourier transform infrared (FT-IR) spectroscopy directly captured the unique vibrational fingerprint of thiophene undergoing σ-coordination at the Cu 1 -O 4 sites, alongside evidence of the promotion of oligomerization and C 4 species formation. This work not only deciphers the nature of high-performance Cu sites but also establishes an electronic-structure-centered design principle for sorbents targeting deep desulfurization in aromatic-rich environments.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·Vol. 46
·期 3
·117895
·
IF 6.2
Deyin Liang,Xiaoqiang Li,Wenlong Yin,Chaoyang Zhang,Bo You,Shengquan Yu
The effects of Y₂O₃–LiF sintering additives on the microstructure, thermal conductivity, flexural strength, and dielectric properties of AlN-based ceramics were systematically investigated. Six different compositions were prepared via ball milling, hot-press sintering, and annealing. XRD and Rietveld refinement confirmed a hexagonal structure for all samples, with changes in the Al–N bond length along the C-axis. SEM analysis revealed that the Y₂O₃–LiF additives modified the morphology of the secondary phase while maintaining a high bulk density. Moreover, annealing resulted in grain boundary purification. As LiF content increased, the second-phase morphology evolved from oval to strip-like, and annealing reduced this phase, improving overall performance. Raman spectroscopy indicated lattice expansion and a blue shift with increasing LiF content. Dielectric analysis of the 2 wt% LiF–Y₂O₃ sample revealed a dielectric constant of 8.56, a dissipation factor of 2.1 × 10⁻⁴, and a high activation energy of 1.38 eV.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
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IF 8.4
Guiting Wang,Jiahui Fan,Ying Xie,Menghan Yu,Kun Li,Xu Guo,Jingfeng Wu,Keying Shi,Kai Pan
The fabrication of high-performance gas-sensitive materials with enhanced moisture resistance is an important research topic. In this work, monodisperse Y-type CoO hierarchical nanostructures with a branch length of about 16 nm have been prepared, and then uniformly dispersed on the surface of reduced oxide graphene (rGO) by hot injection method. The composite exhibited a rapid response to NO 2 at room temperature. The optimal response was about 40–100 ppm NO 2 , the response time was 620 s to 10 ppm NO 2 and the detection limit was 0.01 ppm. It was due to the combination of more NO 2 adsorption active sites of Y-type CoO and faster carrier transfer of rGO. Even at high relative humidity (RH) conditions of 80%, the sensor still retained a high response value of about 90% of that measured at the normal RH (25%). The effective wrapping of stearate ligands inhibited the entrance of water vapor molecules, which could effectively improve the hydrophobic properties of the composite and resulted in enhanced moisture resistance. It may provide a new path for improved NO 2 detection with enhanced moisture resistance at room temperature.
研究领域:
材料科学
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纳米技术
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气体传感
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环境监测
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化学传感器
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Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 11
·1801-1814
·
IF 11.534
Cheng Fuhao,Zhang Fengnian,Liu Yufeng,Guo Meng,Cheng Chufei,Hou Jiadong,Miao Yang,Gao Feng,Wang Xiaomin
Environmental barrier coatings (EBCs) with excellent chemical resistance and good high-temperature stability are of great significance for their applications in next-generation turbine engines. In this work, a new type of high-entropy fluorite-structured oxide (Ce 0.2 Hf 0.2 Y 0.2 Pr 0.2 Gd 0.2 )O 2− δ (HEFO-1) with different Ti 4+ contents were successfully synthesized. Minor addition of Ti 4+ could be dissolved into a high-entropy lattice to maintain the structure stable, effectively reducing the phase formation temperature and promoting the shrinkage of bulk samples. Heat treatment experiments showed that all the samples remained a single phase after annealing at 1200–1600 °C for 6 h. In addition, high-entropy (Ce 0.2 Hf 0.2 Y 0.2 Pr 0.2 Gd 0.2 Ti 0.2 x )O 2− δ demonstrated great resistance to calcium—magnesium—alumina—silicate (CMAS) thermochemical corrosion. When the content of Ti was increased to x = 0.5, the average thickness of the reaction layer was about 10.5 after being corroded at 1300 °C for 10 h. This study reveals that high-entropy (Ce 0.2 Hf 0.2 Y 0.2 Pr 0.2 Gd 0.2 Ti 0.2 x )O 2− δ is expected to be a candidate for the next-generation EBC materials with graceful resistance to CMAS corrosion.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Chunying Li,Fang Nie,Changyin Feng,Mengfei Tian,Meiting Yu,Chunjian Zhao,Yujie Fu
A creative dual-template molecularly imprinted polymer (Fe 3 O 4 @MCM-41-MIPs) with good magnetic properties and specific recognition of echinacoside and acteoside was prepared by surface imprinting. Echinacoside and acteoside served as dual templates, 4-vinylpyridine (4-VP) was used as a functional monomer , the cross-linker was ethylene glycol dimethacrylate (EGDMA), and the selected initiator was azobisisobutyronitrile (AIBN). The prepared Fe 3 O 4 @MCM-41-MIPs were applied to the selective separation and enrichment of echinacoside and acteoside from Cistanche deserticola Y. C. Ma ( C. deserticola ). The resulting Fe 3 O 4 @MCM-41-MIPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), laser particle size scanning and vibration sample magnetometry (VSM). The results of the isotherm adsorption experiment showed that the maximum adsorption capacities of Fe 3 O 4 @MCM-41-MIPs for echinacoside and acteoside were 6.02 and 1.63 mg·g -1 , respectively, at 298 K. The pseudo-second-order reaction mechanism showed that the equilibrium adsorption capacities of Fe 3 O 4 @MCM-41-MIPs for echinacoside and acteoside were 4.81 and 0.93 mg·g -1 , respectively. The characterization of Fe 3 O 4 @MCM-41-MIPs showed that the imprinted layer with dual-template molecules was wrapped on the outside of the carrier, and the obtained Fe 3 O 4 @MCM-41-MIPs showed good saturation magnetization , desirable capacity for echinacoside and acteoside adsorption, and satisfactory reuse (echinacoside and acteoside maintained relative adsorption rates of 97.5% and 95.8% after five cycles). After separation, the purities of echinacoside and acteoside were 33.50% and 27.00%, respectively. In addition, in the selective adsorption experiment, the synthesized Fe 3 O 4 @MCM-41-MIPs showed better selectivity for echinacoside and acteoside than their structural analogs. Therefore, this method proved to be sustainable, rapid and highly efficient for the separation and enrichment of echinacoside and acteoside.
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ChemSusChem
·
2023
·Vol. 16
·期 14
·e202300661
·
IF 8.4
Lulu Jiang,Truls Norby,Donglin Han
Graphical At the boundary : SrZr 0.9 Y 0.1 O 3− δ has high proton transport number in wet oxygen, moderate proton conductivity and high chemical stability. Its grain boundary has lower proton transport number than that of bulk, possibly due to decreased proton mobility and tunnelling of electron holes across the grain boundary. Proton conducting acceptor-doped SrZrO 3 has a history as long as that of BaZrO 3 , but has attracted less interest. Inspired by its higher transport number of ionic conduction in wet oxygen revealed by our recent work, we here explore further aspects of doped SrZrO 3 as electrolyte in proton ceramic electrochemical cells. In-situ high temperature XRD (HT-XRD) analysis of SrZr 0.9 Y 0.1 O 3− δ (SZY10) indicated an anisotropic chemical expansion of hydration, stronger along the b than the a direction, and negative in the c direction. A systematic electromotive force (EMF) and impedance spectroscopy study as a function of and allowed determination of partial conductivities of electron holes and ions (mainly protons) in bulk (grain interior) and grain boundaries. Enthalpies and preexponentials were determined and interpreted for bulk and grain boundary partial conductivities based on defect chemistry and a brick layer model. The hole conductivity in bulk is modest and ensures high ionic transport numbers in oxidizing atmospheres, while grain boundaries exhibit lower ionic transport numbers from a relatively higher hole conductivity attributed primarily to tunnelling past the deepest part of the space charge region. Y-doped SrZrO 3 (SZY) materials exhibit lower proton conductivities but excel over Y-doped BaZrO 3 (BZY) in terms of thermal expansion compatibility with electrode materials and higher ionic transport numbers in oxidizing atmospheres and may hence be candidates for functional layers between BZY-based electrolytes and positrodes in proton ceramic electrochemical cells.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Kang Lei,Haiming Huang,Xu Jia Liu,Weiliang Wang,Kai Guo,Ren Kui Zheng,Han Li
The eco-friendly thermoelectric material SnTe has recently gained immense attention due to its excellent thermoelectric properties and potential. However, its thermoelectric properties are limited by the inherent high carrier concentration (low Seebeck coefficient) and high thermal conductivity. Herein, we further introduce rare-earth element Y on top of the conventional Cu alloying to more effectively modulate its microstructure and thermal transport properties. The experimental results reveal that Y doping gives rise to band convergence, endowing Sn1–xYxTe-5%Cu2Te with an increased power factor of ∼22.14 μW cm–1 K–2. Meanwhile, the introduced abundant Y/Y2Te3 multiscale composite nanostructures in the matrix greatly enhance phonon scattering, resulting in an ultra-low lattice thermal conductivity of ∼0.43 W m–1 K–1. Consequently, these combined effects resulted in a peak ZT value of 1.27 at 823 K in Sn0.97Y0.03Te-5%Cu2Te. An enhancement of nearly 217% is achieved compared to pristine SnTe, which greatly improves the thermoelectric properties of SnTe-based materials.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jun-Wei Huang,Xiao-Feng Dong,Xiao-An Lv,Xiao-Na Ren,Chang-Chun Ge
The Si 3 N 4 ceramics with ternary ZrN–AlN–Re 2 O 3 (Re=Yb, Y, Nd, Ce, La) and ZrN–AlN system as sintering additives were prepared by hot-pressed sintering with vacuum environment at 1750°C-30min–30MPa. Subsequently, the effect of the ternary additives system with 2 wt% Re 2 O 3 on phase transformation, grain boundary phases, microstructure, and mechanical properties of the Si 3 N 4 ceramics were investigated firstly. All samples achieved the high β-Si 3 N 4 phases transformation (≥98.86%), while the grain boundary phases Re x Zr 1-x O (4-x)/2 and Yb 2 Si 2 O 7 were detected in the sintered Si 3 N 4 ceramics with Re 2 O 3 additives. Additionally, compared with Si 3 N 4 ceramic not contain Re 2 O 3 additives, the Si 3 N 4 ceramics added Re 2 O 3 additives presented the textured microstructure with more elongated rodlike β-Si 3 N 4 grains based on the XRD and SEM results. Consequently, the sample S-Ce with added CeO 2 additive shows the highest relative density of 99.85% and optimal fracture toughness of 8.75 ± 0.36 MPa m 1/2 . The sample S–Nd with added Nd 2 O 3 additive presented a highest bending strength of 1061.78 ± 41.76 MPa. Sample S–Yb with added Yb 2 O 3 additive presented the maximum Vickers hardness of 16.35 ± 0.07 GPa. The results of this study can provide a helpful reference for the preparation of high-performance Si 3 N 4 ceramics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Ruiqi Yan,Zhaofu Qiu,Xiaotong Bian,Ji Yang,Shuguang Lyu,Anhui Zhou
As a toxic element, antimony (Sb) often exists in contaminated water in the form of Sb(III) and Sb(V), and poses a threat to the environment and human health. To remove Sb from water efficiently, the novel cerium hydroxide loaded Y-tape molecular sieve adsorbent (NaY@Ce) was successfully prepared by co-precipitation method. Adsorption capacity of the adsorbent showed up the increasing trend with the increase of cerium species. With 0.4 % loading of cerium trichloride, the maximum adsorption capacity of Sb(III) and Sb(V) on NaY@Ce was 24.65 mg/g and 7.28 mg/g at pH = 7.0, respectively. The results of batch experiments showed that the Langmuir isotherm well described the Sb(III) adsorption experiments, while Sb(V) better fitted the Freundlich model. Both adsorption behaviors fitted the pseudo-second-order kinetic model. The adsorbent exhibited excellent Sb removal performance in the wide range of pH = 2–10 and co-existing anions such as Cl − , NO 3 − , HCO 3 − and SO 4 2- almost have no effect on the adsorption process. And there was almost no release of Ce at pH＞2. The SEM, EDS, XRD, FTIR and XPS analysis confirmed the successful loading of Ce, and explained the possible mechanism of Sb on the adsorbent. Abundant hydroxyl groups and the presence of Ce(Ⅳ) were the basis of adsorption. The adsorption mechanisms for antimony included partial Sb(III) oxidized to Sb(V) and simultaneously adsorbed on NaY@Ce, formed Ce–O–Sb inner-sphere surface complexes between metal hydroxyl groups and antimony and electrostatic attraction. The above results confirmed that NaY@Ce can be used as a promising adsorbent to efficiently remove Sb from aqueous solution.
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ENVIRONMENTAL RESEARCH
·
2019
·
IF 5.026
Ting Su,Lipeng Wu,Gancheng Zuo,Xihao Pan,Mingyang Shi,Cheng Zhang,Xiaoliang Qi,Wei Dong
Hydrogel adsorbents have attracted considerable attention due to their sludge minimization, good water permeability and renewable performance. Here, a promising strategy for the one-step preparation of pullulan/polydopamine hybird hydrogels (PPGels) was presented. Dumbbell-shaped cross-linker neopentyl glycol diglycidyl ether (NGDE, 2 arms) and Y-shaped cross-linker trimethylolpropane triglycidyl ether (TTE, 3 arms) were selected to study the relationship between cross-linker structure and hydrogel performances. The NGDE possessing less molecular repulsive force and higher reactivity demonstrated more effective cross-linking with the pullulan, which leaded to a decrease in pore size of the hydrogel. Meanwhile, the introduction of polydopamine significantly enhanced the adsorption ability and gave the resulting hybrid gel the specific selectivity toward cationic dyes (96 mg/g for crystal violet, 25.8 mg/g for methylene blue and barely not adsorption for azophloxine). Our data suggested that the electrostatic interaction played a vital role in the dye adsorption process, and the adsorption data could be explained by pseudo-second-order model and Langmuir isotherm model. Furthermore, the obtained PPGel could be easily separated after adsorption. This study describes the relationship between cross-linker structure and properties of pullulan/polydopamine hybrid gels, which provides a new strategy to create polysaccharide-based adsorbents for wastewater remediation.
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