CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Limin Wu,Yihua Pan,Shoulei Xu,Peng Zhang,Wenxia Wu,Yan Hao,Shengdi Ta,Yazhao Wang,Bernard Albert Goodman,Wen Deng
High-quality cubic YSZ crystals were designed with various contents of Er 3+ , Tm 3+ and Yb 3+ to produce white light emission, and grown by the optical floating zone method. The up-conversion luminescence spectra of the crystals under 980 nm laser irradiation show three distinct groups of emission peaks at ∼473 nm (blue) generated by the Tm 3+ 1 G 4 → 3 H 6 transition, 531 and 547 nm (green) from the Er 3+ 2 H 11/2 → 4 I 15/2 and 4 S 3/2 → 4 I 15/2 transitions, and 640 and 662 nm (red) from the Er 3+ 4 F 9/2 → 4 I 15/2 transition. The optical power curve obtained by plotting the up-conversion luminescence intensity against the laser power shows that the blue emission involves a three-photon process, whilst both the green and red emissions are the results of two-photon processes. Overall white light emission was observed with the crystal prepared with 0.05 mol% Er 2 O 3 , 0.5 mol% Tm 2 O 3 and 2.0 mol% Yb 2 O 3 , and this crystal is suitable for use in highly efficient white light emission devices.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yanting Li,Shu Zhu,Hua Zhao,Yan Xiong,Tao Gong,Yanru Tao,Jin Li,Jiangling Hu,Hongmei Wang,Xinhui Jiang
Recently, the endocrine interference of endocrine disruptors on the environment and aquatic organisms has been a hot topic. Ethinyl estradiol (EE2) is an estrogen endocrine disruptor and one of the most widely used ingredients in oral contraceptives, resulting in high emissions and environmental pollution . Therefore, it is urgent to construct a non-enzymic, simple and low-cost sensor to detect EE2 in environmental and biological samples. We successfully prepared cobalt ferric oxide with anti-spinel structure and reduced graphene oxide composite (CoFe 2 O 4 /RGO) using hydrothermal synthesis, which decorated on the glass carbon electrode (GCE) to detect EE2. The morphological structure of CoFe 2 O 4 /RGO composites was studied by FESEM, HRTEM, EDX, FT-IR, XRD, and XPS techniques. Additionally, the experimental conditions were optimized and the oxidation mechanism of EE2 was explained theoretically and EE2 was detected by CV, EIS, and SWV, which displayed a fantastic current response of EE2. The electrochemical results illustrated that the prepared sensor has good selectivity , high sensitivity, a wide linear range of 0.05–100 μM, and a lower detection limit of 42 nM. Finally, the practicability of the sensor to detect EE2 in real samples was also studied and obtained a satisfactory recovery.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yizhong Zhang,Wei Zhou,Junyan Wang,Lixia Jia,Lequan Liu,Xin Tan,Tao Yu,Jinhua Ye
In this study, non-noble metal Cd decorated cubic phase CdS (CdS/Cd) thin layer on a millimeter-scale chitosan-Mg(OH) 2 xerogel beads (CMB) were elaborately designed and successfully synthesized via facile hydrated electrons (e aq •− ) assistant strategy. The in-situ formation of metallic Cd was driven by e aq •− generated from UV/Na 2 SO 3 process. Owing to metallic Cd, CMB@CdS/Cd exhibited better visible-light absorption ability and more efficient separation capability for photo-induced carriers, its hydrogen production efficiency was about threefold improved compared to CMB@CdS. Both characterization methods and density functional theory calculations determined a built-in electric field from metallic Cd to CdS and Ohmic-contact between Cd and CdS, which largely promoted the carriers transfer efficiency. Moreover, the introduction of metallic Cd on the CdS could reduce the ΔG H* , thus greatly boosting the photocatalytic hydrogen production efficiency. This work provides a simple and green approach to construct metallic Cd coupled semiconductor to achieve efficient photocatalytic applications.
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DOI
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 13
·2839-2852
·
IF 5
Yuan Gao,Mengxi Zhong,Jianpeng Chen,Shouqi Wang,Binyi Zhang,Qingzhuo Li,Wei Liu,Jiu-Tao Gao,Cheng-Xin Li,Chang-Jiu Li
Low-temperature solid oxide fuel cells (LT-SOFCs), which can operate at 600 °C or lower, have recently emerged as a promising technology for widespread applications because of their low cost and high stabilities. Novel electrolyte materials with excellent ionic conductivities and stabilities are increasingly in demand for application in LT-SOFCs. Herein, a dysprosium and zirconium co-doped face-centered cubic phase-stabilized bismuth oxide (DZSB) electrolyte has been synthesized using the reverse co-precipitation method. Dysprosium and zirconium are selected to co-dope bismuth oxide because of their large radii and high polarizabilities, which can enhance conductivity stabilities. Dysprosium and zirconium can uniformly replace Bi sites and single-cubic phase DZSB powders of ∼150nm can be synthesized at 700 °C. High relative densities of sintered DZSB pellets (>95%) are obtained via calculations and scanning electron microscopy. D15Z5SB, which contains 15 mol% dysprosium and 5 mol% zirconium, presents the highest ionic conductivity of 0.037 S cm−1 at 500 °C. The activation energy of the ionic conductivity of D2Z5SB shows a single value of 1.23 eV at high- and low-temperature regions. D20Z5SB and D25Z5SB show excellent stabilities for 450 h at 500 °C, with conductivities of 0.007 and 0.0026 S cm−1, respectively.
研究领域:
材料科学
·
电化学
·
能源材料
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qian Liu,Shao-Jian Zhang,Cheng-Cheng Xiang,Chen-Xu Luo,Peng-Fang Zhang,Chen-Guang Shi,Yao Zhou,Jun-Tao Li,Ling Huang,Shi-Gang Sun
Cubic N,S codoped carbon coating MnS–FeS2 composites (MnS–FeS2@NSC) with a hollow structure were prepared and used as anode materials for sodium-ion batteries. MnS–FeS2@NSC exhibits excellent cycle performance and high rate capability and delivered a reversible capacity of 501.0 mAh g–1 after 800 cycles at a current density of 0.1 A g–1 with a capacity retention of 81%. More importantly, the MnS–FeS2@NSC anode holds long-term cycle stability; the capacity can remain 134.0 mAh g–1 after 14 500 cycles at 4 A g–1. Kinetic analysis demonstrated that Na+ storage follows a pseudocapacitive dominating process, which is ascribed to the origin of the outstanding rate performance of the MnS–FeS2@NSC material. The enhancement of electrochemical performance is attributed to the hollow structure and the N,S codoped carbon coating structure, which can reduce the diffusion distance for sodium ions and electrons, alleviate volume expansion during sodium-ion insertion/extraction, and retain the structural integrity effectively. Furthermore, a two-step sodiation processes with FeS2 sodiation prior to MnS was demonstrated by X-ray diffraction (XRD), and the electrochemical impedance spectroscopy (EIS) spectra might indicate that the accumulation of the metallic elements in the preconversion reaction can accelerate the transfer of electrons and ions in the further conversion process.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2019
·
IF 3.176
Wen Cui,Xiaoli Kang,Xiaoying Zhang,Zhou Zheng,Xudong Cui
Recently, Metal-organic framework (MOF) has attracted general attention as self-sacrificial template to produce metal oxide semiconductor (MOS) for gas sensing. In this work, we fabricated a porous cubic microstructure of Co 3 O 4 through the facile pyrolysis of ZIF-67. The obtained Co 3 O 4 sustained a similar cubic morphology with ZIF-67 template, but much improved pore structure was achieved. Moreover, we attempted to modify the Co 3 O 4 with Au nanoparticles . Through a facile post-synthesis adsorption & pyrolysis, the Au nanoparticles with an average size of 15–20 nm were evenly dispersed on the surface of Co 3 O 4 . Then the obtained samples were investigated for acetone gas-sensing. Results showed that both Co 3 O 4 and its Au doped structure could be used for acetone detection, while due to the existence of metal-semiconductor heterojunction and the catalysis and spillover functions of Au nanoparticles, the prepared Au/Co 3 O 4 composite showed much improved acetone response and much shortened response-recovery time than that of the bare Co 3 O 4 structure.
研究领域:
材料科学
·
纳米技术
·
化学传感器
·
气体传感
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 8
·2692-2700
·
IF 4.052
Hui-Tao Fan,Xue-Guo Liu,Xiao-Jing Xing,Bo Li,Kun Wang,Shu-Ting Chen,Zhou Wu,Dong-Fang Qiu
In this work, using a modified Stöber process, we synthesized ordered mesoporous silica cubic particles (OMS-C) and prepared a nanocatalyst (Ag–OMS-C) based on OMS-C with a high surface area via an in situ auto-reduction strategy. The as-prepared Ag–OMS-C nanocomposites demonstrated open mesopores (3.51 nm), a large specific surface area (540 m2 g−1) and a high pore volume (0.88 cm3 g−1). The catalytic reduction of 4-nitrophenol (4-NP) over the Ag–OMS-C nanocatalyst was almost complete within 150 s without stirring and the rate constant k (30 × 10−3 s−1) is much higher than those of other substrate-supported Ag nanocatalysts. Moreover, the Ag–OMS-C nanocomposites hold a stable catalytic efficiency over five reaction cycles. The results indicate that the Ag–OMS-C nanocatalyst exhibited high catalytic activity and good reusability toward the reduction of 4-NP, which might be attributed to the large specific surface area, the pore structure of the nanocatalyst, as well as the synergistic effect between OMS-C and AgNPs.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2010
·
IF 5.288
Hengquan Yang,Guang Li,Zhancheng Ma,Jianbin Chao,Zhiqiang Guo
New cubic cage-like mesoporous materials with a bulky N-heterocyclic carbene [IPr, 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene] precursor in the framework were synthesized by a co-condensation of IPr precursor-bridged organosilane and TEOS in the presence of template. N 2 sorption, XRD and TEM characterizations revealed that the mesostructural orderings of the synthesized materials depended on the molar fraction of the bridged organosilane in the initial gel mixture. With the increase in the molar fraction of the organosilane from 2.5% to 15%, the mesostructure of the synthesized material changed from a well-ordered 3D ordered structure to a amorphous structure. FT-IR and solid-state NMR characterizations confirmed that IPr carbene precursor was covalently integrated with the solid materials. Such hybrid materials were able to coordinate Pd(acac) 2 , leading to active solid catalysts for Suzuki–Miyaura couplings of less reactive aryl chlorides. The solid catalyst could be reused 8 times without a significant decrease in activity. Furthermore, the solid catalyst was active for the coupling of C(sp 3 )-chlorides and arylboronic acids.
研究领域:
材料化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Tianyu Zhang,Dai Lu,Yini Zeng,Yan Lv,Xingbo Shi
Multifunctional Prussian blue analogs (PBAs) have received extensive attention in the detection and degradation of food hazards. However, the development of new structural adjustment strategies to further improve their performance remains a huge challenge. Herein, the “interface recombination” post-processing approach was established to regulate the structure of PBAs using a microwave-assisted solvothermal method combined with acid etching. Hollow cube-shaped M-NiMnFe-PBA with elevated peroxidase-mimetic activity, photothermal effect, and photo-Fenton performance was obtained. Based on M-NiMnFe-PBA, a dual-mode nanoenzyme-linked immunoassay sensing platform was constructed for aflatoxins B1 (AFB1) detection, achieving low detection limits of 4.96 fg/mL in the colorimetric mode and 1.5 pg/mL in the photothermal mode. Due to its admirable photo-Fenton performance, AFB1 was almost completely degraded within 3 h, resulting in a significant reduction in its cytotoxicity. This work provides a new solution for synthetic regulation and property enhancement of PBAs, which promotes their application in control of food hazards.
研究领域:
食品科学
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生物医学工程
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 21
·期 11
·1691-1700
·
IF 3.304
Zhikun Wang,Wenfeng Han,Huazhang Liu
Uniform, free-standing and cubic SrF2 microparticles were successfully fabricated by a facile hydrothermal method with ethylenediaminetetraacetic acid (EDTA) as the chelating agent. The influences of preparation conditions, such as the pH value, amount of EDTA and hydrothermal time, on the formation of SrF2 crystals were investigated. The formation mechanism of cubic SrF2 particles was proposed based on the experimental results. Following calcination in air at 500 °C, SrF2 particles were evaluated as the catalyst for the pyrolysis of 1-chloro-1,1-difluoroethane (HCFC-142b, CH3CClF2) to vinylidene fluoride (VDF, CH2CF2) at 350 °C and a space velocity of 600 h−1. The results indicate that SrF2 cubes exhibit high catalytic activity with a HCFC-142b conversion of about 70% and a selectivity to VDF of 80–87%. No significant deactivation was observed within the time on stream of 30 h. With the reaction temperature increased to 450 °C, the conversion of HCFC-142b is close to 94%, while the selectivity to VDF remains almost unchanged. Although the SrF2 catalyst prepared by the conventional precipitation method also shows high conversion, its selectivity to VDF is only around 50–70%. We suggest that the surface acidity and specific surface area play major roles in the catalytic performance. Compared with the temperatures for industrial manufacture of VDF of 650–700 °C, the SrF2 catalysts provide a promising pathway to produce VDF at much lower temperatures.
研究领域:
化学工程
·
材料科学
·
催化
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Jinfeng Qiu,Guangliang Chen,Yingchun Guo,Tongtong Li,Peisong Tang,Bin He,Xianhui Zhang,Jun Huang
Engineering efficient bifunctional electrocatalysts for simultaneous hydrogen and oxygen evolution reactions (HER/OER) remains very crucial for practical anion exchange membrane water electrolyzers (AEMWEs). Herein, a yttrium oxide doped cubic Co 3 O 4 (Y 2 O 3 -Co 3 O 4 ) catalyst engineered on plasma-treated carbon cloth (PCC) is reported which demonstrates exceptional performances for overall seawater splitting. Synthesized at an optimal crystallization temperature (250 °C), the obtained Y 2 O 3 -Co 3 O 4 /PCC features rich heterointerfaces which optimize active sites and enhance electron transfer, thereby, causing an outstanding HER activity with ultralow overpotentials of 301 mV (alkaline) and 346 mV (seawater) for transferring 1000 mA cm −2 ( j 1000 ). When the catalyst is integrated into AEMWE devices, low cell voltages of 2.11 V (alkaline) and 2.47 V (alkalized seawater) are achieved for generating j 1000 . Combined with the experimental and theoretical investigations, it reveals that the yttrium doping induces a favorable electron redistribution, where the electron delocalization of Y-site stabilizes Co 3 ⁺ species and the electron accumulation of Co-site optimizes H* adsorption. In addition, the formed heterointerface of Y 2 O 3 -Co 3 O 4 simultaneously enhances OER activity through optimizing the oxygen intermediate adsorption and strengthening the metal-oxygen bonds. Furthermore, the heterostructure design additionally reduces the lattice strain and accelerates charge transfer kinetics for seawater splitting.
研究领域:
材料科学
·
电化学工程
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产品关联
DOI
高影响因子
Catalysts
·
2026
·Vol. 16
·期 1
·69
·
IF 4
Lin-Yu Jiao,Ze-Long Sun,Wen-Yu Luo,Fei Wen,Jun-Bo Ye,Kang-Lai Chen,Long Xu,Bin Tian,Shan-Shan Liu
In recent years, biomass utilization has attracted extensive attention. Herein, hexagonal/cubic ZnIn2S4(ZIS) heterojunction catalysts were synthesized via a solvothermal method for the selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The results demonstrated that the constructed heterojunctions effectively promoted carrier separation. The optimal catalyst achieved an HMF conversion rate of 88.8% and a DFF yield of 86.6% within 1 h in the open air. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) characterizations confirmed the successful fabrication of the composite phase structure and revealed a porous spherical morphology. Equivalent circuit fitting of electrochemical impedance spectroscopy (EIS) data indicated that the hexagonal/cubic heterojunctions possessed the lowest charge transfer resistance (Rct = 5825 Ω), which effectively reduced interfacial charge transfer resistance and accelerated the transport of photoinduced carriers. Radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy identified superoxide radicals (·O2−) as the primary reactive species. Meanwhile, density functional theory (DFT) calculations elucidated the formation of the built-in electric field and the charge transfer mechanism. This work’s construction of Type-II ZIS heterojunctions effectively addressed the issue of rapid carrier recombination in pristine ZIS materials, providing a feasible strategy for biomass valorization.
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产品关联
DOI
高影响因子
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