APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Ruichun Nan,Xinxin Zhang,Yuheng Zhao,Hongda Huang,Yapeng Niu,Ying Yan,Litao Zhang,Bingkun Liu,Jingtao Zhang,Xianzhong Yin
Herein, Pd-doped CeO 2 was synthesized by facile hydrothermal methods, X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) suggests that Pd is successfully incorporated into the CeO 2 lattice. X-ray photoelectron spectroscopy (XPS), UV–Vis and PL demonstrated that Pd-doped CeO 2 improve the light absorption and enhance the electron-hole separation of CeO 2 . The prepared Pd-CeO 2 exhibits outstanding bactericidal performance. Specifically, 1 % Pd-CeO 2 can completely inactivate Ralstonia solanacearum with an initial concentration of 2 × 10 7 CFU/mL within 60 min, while also demonstrating effective killing against Escherichia coli and various pathogenic fungi. EPR demonstrated that Pd doping into CeO 2 could increase the number of vacancies, electron spin resonance (ESR) tests demonstrated that e - play a major role in the photocatalytic process, disruption of the cellular structure of E. coli during photocatalytic treatment as evidenced by scanning electron microscopy (SEM) tests. Promising reference for the practical application of precious metal photo catalysts in disinfection.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
Energy & Environmental Science
·
2024
·Vol. 17
·期 13
·4794-4802
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IF 32.4
Zhengqiang Hu,Fengling Zhang,Feng Wu,Huirong Wang,Anbin Zhou,Yi Chen,Tianyang Xue,Renjie Chen,Li Li
In electrochemical devices, the electric double layer (EDL) theory posits that the potential difference of the Helmholtz layer significantly influences the activation energy and reaction rate of the electrochemical reaction, which determines the uniformity of metal ion deposition. In this work, we compare the differential capacitance of metal cationic sulfate, along with factors such as cost as well as safety, and Ce(SO4)2 is selected to adjust the EDL at the Zn anode/electrolyte interface. Molecular dynamics simulations show the formation of a more compressed diffuse layer with the help of Ce4+, resulting in a decreased potential difference of the Helmholtz layer, an improved Zn2+ deposition overpotential and a reduced Zn electrode corrosion rate. In situ XRD and Raman spectroscopy reveal that Zn2+ deposition is favored along the (002) crystal plane, and hydrogen evolution is hindered. The Ce4+ modified electrolyte enables a Zn anode with high coulombic efficiency (99.6%) over 600 cycles at 10 mA cm−2. The compressed EDL extends the lifespan of the Zn–Zn cell to 2500 hours at 5 mA cm−2 and stable cycling for 300 cycles at 20 mA cm−2 and 10 mA h cm−2. Assembling Zn full cells with high-loading cathodes shows enhanced long-term cycling performance. Our findings reveal the potential of using high-valence metal cations like Ce4+ to regulate the EDL and uniform Zn2+ deposition in ZIBs, which suggests a promising direction for developing electrolytes for practical ZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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2025
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IF 3.1
Zhifan Li,Huiwei Wei,Gentao Gao,Zhiyong Deng,Shaohua Sun,Zuoye Liu,Baowei Ding,Bitao Hu,Jie Shen
This study represents a highly sensitive approach of determination of lanthanides by nanochain enhanced laser induced breakdown spectroscopy (LIBS). Owing to geometrical characteristics of the nanochains, the hotspot in the gap between Ag NPs in nanochains offered an intense plasmonic field for the LIBS signal enhancement. Remarkably, the nanochain enhanced LIBS for determining Ce and La element yielded outstanding limit of detection (LOD): 27.47 and 85.71 ng/mL, respectively, indicating that the nanochain configuration exhibited enhanced LIBS signal response. The preponderant performances of the well-aligned nanoparticle sensor in elemental analysis open up its possibilities for nanochain enhanced LIBS in sensitive elemental detection.
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Xinzhu Gan,Zhichao Yu,Kangkang Yuan,Chonghe Xu,Guanghui Zhang,Xinqiang Wang,Luyi Zhu,Dong Xu
Ce-doped yttria-stabilized ZrO 2 (YSZ) fibers were prepared with different Ce concentrations (0, 5, 10, 20 mol%) by the sol-gel method. The effects of Ce addition on the microstructure and mechanical properties of the YSZ fibers have been investigated. Compared with the pure YSZ fibers, the Ce addition could cause grain refinement whose mechanism was discussed. Moreover, mechanical measurements showed that the Ce addition could increase the Young's modulus and microhardness of the YSZ fibers. When the doping content was 10%, the values of Young's modulus and microhardness were improved by almost 3 times and 2 times compared with those of the pure YSZ fibers, respectively. Results show that the Ce addition could improve the thermal insulation , thermal conductivity at 800 °C being reduced by over one third (33.52%) when the amount of Ce increased to 20%.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Central South University
·
2020
·Vol. 27
·期 4
·1176-1185
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IF 1.249
Jin Lin-feng,Chai Li-yuan,Song Ting-ting,Yang Wei-chun,Wang Hai-ying
Magnetic Fe 3 O 4 @Cu/Ce microspheres were successfully prepared by one-step solvothermal approach and further utilized to remediate toxic arsenic (As(III)) pollution. The effects of Cu/Ce elements co-doping on the crystal structure, catalytic oxidation and adsorption behaviors of magnetic microspheres were researched systematically. The results showed that with the aid of Cu/Ce elements, the grain size reduced, lattice defects increased, and the oxygen vacancies and surface hydroxyl groups were improved. Therefore, Cu/Ce elements endowed magnetic Fe 3 O 4 @Cu/Ce microspheres with excellent As(III) removal performance, whose maximum adsorption capacity reached 139.19 mg/g. The adsorption mechanism mainly involved catalytic oxidant co-adsorption. This research developed a feasible strategy for the preparation of high efficiency magnetic adsorbent to enhance the removal of As(III).
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2013
·
IF 1.789
Lin Gan,Zhi-Yong Mao,Yi-Fei Wang,Fang-Fang Xu,Ying-Chun Zhu,Qing Huang,Xue-Jian Liu
Cerium-doped Ca–α-SiAlON phosphors with Ca n −1.5 x Si 12− m − n Al m + n O n N 16− n :Ce x ( m =2 n , 0.8≤ m ≤2.4, and 0.02≤ x ≤0.40) nominal compositions have been synthesized by gas pressure sintering (GPS). The photoluminescence (PL) properties were studied in relation to phase composition, particle morphology , and microstructure. Continuous addition of Ce rare-earth (RE) could enhance the emission intensity of phosphors, which was partially attributed to the formation of increased amount of planar defects where dense doping of Ce ions is achieved. Such enhancement could hold up to x =0.32, above which the emission intensity fell slightly due to the formation of more secondary phases and a surface glassy phase rather than concentration quenching. Finally, possible ways to improve the luminescence properties of Ce-doped α-SiAlON phosphors were discussed through tailoring the composition and microstructure.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 327
·期 3
·1159-1166
·
IF 1.371
Li Lingshuang,Luo Fen,Chen Zhi,Shu Xiaoyan,Tang Hexi,Chen Shunzhang,Wang Lan,Xie Yi,Lu Xirui
Abstract This work investigated the irradiation behavior of gray desert soil holding simulated An 4+ waste under an irradiation of 1.5 MeV Xe 20+ to fluences from 1 × 10 12 to 1 × 10 15 ions cm − 2 . The results indicated that the structure has no obvious change due to irradiation fluences and waste load. The normalized leaching rate of Ce after 28 days of the MCC-1 test is in the order of 1 × 10 − 5 g cm − 2 d − 1 before and after irradiation. This work identifies gray desert soil, which has good radiation resistance, as a potential matrix for solidification tetravalent actinides. Graphic abstract
研究领域:
环境科学
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放射性废物管理
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2014
·
IF 4.835
Bing Chen,Xvsheng Qiao,Dengfeng Peng,Xianping Fan
In this study, hexagonal-phase NaY0.6–xCe0.1Gd0.3EuxF4 nanorods were synthesized via a mild solvothermal method. By modifying the Eu3+ dopant concentration, the crystal phase, morphology, and luminescent properties were well controlled. A broad excitation band centered at around 260 nm corresponding to the 2F5/2 → 4f-5d transition of Ce3+ was detected in the hosts containing Gd3+ ions by monitoring the Eu3+ emissions, indicating that an efficient Ce3+ → Eu3+ energy transfer occurred via the Gd3+ sublattice. Luminescence decay behaviors of the NaY0.6–xCe0.1Gd0.3EuxF4 nanorods were studied, and the energy transfer mechanism was discussed. An obvious rising edge on the luminescence decay curve of Eu3+ ions in the NaY0.6–xCe0.1Gd0.3EuxF4 nanorods was observed. The rising time is proposed to describe the energy migration time from Ce3+ to Eu3+ via the Gd3+ sublattice.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2014
·
IF 3.309
Yuxi Gao,Xiaodong Wu,Shuang Liu,Duan Weng,Hongwei Zhang,Rui Ran
MnO x –CeO 2 mixed oxides were synthesized using a sol–gel method and the barium-loaded catalyst was prepared by a wet impregnation. Both catalysts were hydrothermally aged at 800 °C for 10 h. The fresh and aged catalysts were characterized by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), high-resolution transmission electron microscopy (HRTEM), H 2 temperature-programmed reduction (H 2 -TPR), NO temperature-programmed oxidation (NO-TPO) and soot temperature-programmed oxidation (soot-TPO). Compared with MnO x –CeO 2 , the Ba-modified mixed oxides show a much higher hydrothermal stability. Barium exists in the form of orthorhombic carbonate and cubic nitrate on the fresh sample. BaMnO 3 nanoparticles are identified to form at the interface of CeO 2 crystallites upon the hydrothermal ageing. The formation of the perovskites prohibits the sintering of ceria significantly, and consequently maintains the redox property of the aged mixed oxides to a great degree. Additionally, the nanoscaled perovskites themselves also contribute to the catalytic activity of the aged oxides catalyst.
研究领域:
催化材料
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Dengfeng Yan,Shengpeng Mo,Yuhai Sun,Quanming Ren,Zhentao Feng,Peirong Chen,Junliang Wu,Mingli Fu,Daiqi Ye
Herein, CeO 2 catalysts with nanotube , nanobelt, and wire-in-nanotube morphologies were successfully fabricated by a facile single spinneret electrospinning technique. And catalytic activity of these electrospun CeO 2 nanomaterials were evaluated by toluene catalytic combustion reaction. Among the three morphologies of CeO 2 catalysts, CeO 2 nanobelt (CeO 2 -NB) presented the best toluene catalytic combustion performance (T 90% = 230 °C) at WHSV = 60,000 mL g −1 h −1 , also exhibited the lowest activation energy (E a = 80.2 kJ/mol). Based on the characterization by TEM , XRD, BET, SEM, XPS, Raman spectroscopy , H 2 -TPR, and O 2 -TPD results, the high catalytic activity of CeO 2 -NB catalyst was attributed to its porous nanobelt morphology with larger specific surface area and the abundance of surface oxygen vacancies. Furthermore, the CeO 2 -NB catalysts presented an excellent durability by longtime on-stream test (as well as presence of 5% vol. water vapor), suggesting its great potential for practical air pollution control application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Shihai You,Shuxing Li,Yongchao Jia,Rong-Jun Xie
Traditionally, phosphors are developed by doping activators on standard crystallographic sites of selected inorganic hosts, thus enabling the prediction of their luminescence with some empirical models or theoretical calculations. Here, we propose the idea of interstitial site engineering as a totally different way to design phosphors with promising properties. In detail, a red-emitting phosphor La3Si6N11:Ce3+,Al3+ was developed by engineering the interstitial Ce3+ site, which produces an unusual red emission band (λem = 600–665 nm) under blue light excitation. The origin of this red emission was assigned from the first-principle calculation to the Ce3+ ion occupying the [Si8N8] void in the c∼1/2 layer of which the calculated transition energies matching with experiment within 0.1 eV. Such an interstitial Ce3+ site was created as a charge compensator for the aliovalent substitution of Si4+ by Al3+ ions. The red-enhanced La3Si6N11:Ce3+,Al3+ phosphor showed great potentials for improving the optical quality (i.e., color temperature and color rendition) of laser-driven white light. This work indicates that the interstitial site engineering is an efficient way for generating new luminescence centers and opens up an avenue for designing phosphors with appealing properties.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yizhou Wang,Shuo Geng,Fei Liu,Mengqin Yao,Jun Ma,Jianxin Cao,Ziwei Li
Cerium(IV) oxide (CeO 2 )-based materials are effective catalysts for the synthesis of dimethyl carbonate (DMC) from carbon dioxide (CO 2 ) and methanol (CH 3 OH). Herein, 5% Y–CeO 2 was synthesized by the co-precipitation method. It forms a solid solution structure, which leads to the highest concentration of oxygen vacancies. The Y–V O –Ce active site created by Y 3+ doping enhances the adsorption and activation of CO 2 based on moderately passivating CH 3 OH adsorption. Consequently, 5% Y–CeO 2 exhibited the highest CH 3 OH conversion rate of 0.8% and a DMC yield of 15 mmol⋅(g cat) −1 , which is 1.4 times of pure CeO 2 (reacting in a stainless-steel autoclave at 140 °C with a stirring speed of 1000 r⋅min −1 and an initial pressure of 3.0 MPa for 2 h). An adsorption test and in situ diffuse reflectance infrared Fourier transform spectroscopy showed that 5% Y–CeO 2 could effectively inhibit the formation of triple-bonded methoxy species, and promote the formation of bidentate carbonate and bridged methoxy intermediates, which is conducive to the improvement of reaction activity.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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