DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 6
·1996-2006
·
IF 4.029
Xuan Yang,Shuangshuang Deng,Fumin Peng,Tao Luo
A novel Ce(III) ion-implanted aluminum-trimesic metal–organic framework (Ce–MIL-96) was synthesized for the first time via alcohol-solvent incipient wetness impregnation. Compared to previously reported Ce-contained adsorbents, the fluoride adsorption performance of the new ion-implanted metal–organic framework demonstrated much higher adsorption capacity and more efficient regeneration of Ce. In a wide pH range of 3 to 10, Ce–MIL-96 maintained constant adsorption performance for fluoride, and the residual Ce and Al in the treated solution were below the safe limits in drinking water. The maximum adsorption capacity of Ce–MIL-96 was 38.65 mg g−1 at 298 K. Excluding the contribution of MIL-96, the maximum adsorption capacity of Ce ions was 269.75 mg g−1, which demonstrated that the service efficiency of cerium in Ce–MIL-96 is about 6 times that in Ce2O3, nearly 10 times that in Ce-mZrp, and double that in Mn–Ce oxides. There was no significant influence on fluoride removal by Ce–MIL-96 due to the presence of chloride, nitrate, sulfate, bicarbonate or phosphate. Moreover, the adsorption capacity of Ce–MIL-96 remained at more than 70% after nine cycles of adsorption–desorption. Due to this excellent adsorption performance and its regeneration properties, Ce–MIL-96 is a promising adsorbent for the removal of fluoride from groundwater.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
Acta Metallurgica Sinica-English Letters
·
2024
·
IF 2.9
Zeng Yanwei,Xu Peng,Liu Guoqiang,Wang Tianguan,Lei Bing,Feng Zhiyuan,Zhang Ping,Meng Guozhe
Chloride-induced corrosion of steel reinforcement is the key factor leading to the degradation of reinforced concrete building durability. Improving the corrosion resistance of oxide scale of rebar has always been a research hotspot in the field of civil engineering materials. A ZIF-8 modified Ce–Sol–gel (ZCS) film was prepared on oxide scale of plain steel rebars by sol–gel method. It is observed that the | Z | 0.01 Hz value of the ZCS film reached 320 kΩ cm 2 , which is about 29 times higher than that of blank rebar in simulated concrete pore (SCP) solution with 0.1 M NaCl. Then, they were inserted into mortar block and curing them in a curing box at T = 20 ± 2 °C and RH = 95 ± 2% for 28 days. Subsequently, these samples were subject to electrochemical impedance spectroscopy in 3.5 wt% NaCl. The | Z | 0.01 Hz value of the rebar with the ZCS film was six times higher than that of the blank rebar after immersing for 20 days, resulting in an overall increase in corrosion resistance for rebar. The results indicated that the modification by ZIF-8 could reduce the porosity of Ce–sol–gel (CS) film and improved the “labyrinth effect” of the film. Additionally, the negative charge on the surface of ZIF-8 in alkaline condition increased the repulsion effect with Cl − , significantly reducing the sensitivity of rebar to Cl − .
研究领域:
土木工程材料
·
防腐蚀技术
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 16
·1352
·
IF 4.4
Teng Gao,Hongqi Chu,Shijie Wang,Zhenzi Li,Wei Zhou
Photocatalysis is the most promising green approach to solve antibiotic pollution in water, but the actual treatment effect is limited by photocatalytic activity. Herein, Bi and BiOCl were loaded onto the surface of Ce-MOF (metal–organic framework) using an electrostatic adsorption method, and a special ternary heterojunction of Ce/Bi/BiOCl was successfully prepared as a photocatalyst for the degradation of tetracycline (TC). FTIR demonstrated that the obtained photocatalyst contains functional groups such as -COOH belonging to Ce-MOF and characteristic crystal planes of Bi and BiOCl, indicating the successful construction of a ternary photocatalyst. The results of UV–vis absorption spectra confirm that the band gap of Ce/Bi/BiOCl heterojunction is reduced from 3.35 eV to 2.7 eV, resulting in an enhanced light absorption capability in the visible light region. The special ternary heterojunction constructed by Ce-MOF, Bi, and BiOCl could achieve a narrow band gap and reasonable band structure, thereby enhancing the separation of photogenerated charges. Consequently, the photocatalytic performance of the Ce/Bi/BiOCl ternary heterojunction was significantly enhanced compared to Ce-MOF, Bi, and BiOCl. Therefore, Ce/Bi/BiOCl can achieve a photocatalytic degradation rate of 97.7% within 20 min, which is much better than Bi (14.8%) and BiOCl (67.9%). This work successfully constructed MOF-based ternary photocatalysts and revealed the relationship between ternary heterojunctions and photocatalytic activity. This provides inspiration for constructing other heterogeneous catalysts for use in the field of photocatalysis.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Jingjing Jiang,Kai Zhang,Xiaodong Chen,Fei Zhao,Tengfeng Xie,Dejun Wang,Yanhong Lin
In this study, Ce-doped ZnO photocatalysts are successfully prepared by using a simple and facile one-pot water bath method. The as-prepared samples are characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–Vis) diffuse spectroscopy and Brunauer-Emmett-Teller (BET) surface area analysis. It is found that the as-synthesized Ce-doped ZnO possessed hollow porous structure, high surface areas and large pore volumes . The photocatalytic degradation efficiency (99%) of methyl orange (MO) with an optimal molar ratio of 0.3% Ce-doped ZnO is realized. The separation behavior of photogenerated electrons-holes pairs was investigated by surface photovoltage (SPV) and transient photovoltage (TPV) technique. The results illuminate that Ce element in Ce-doped ZnO tremendously promotes the separation of charges and inhibits the recombination of photogenerated charge carriers, corresponding to the excellent photocatalytic performance.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Fajie Hu,Rushuo Li,Danfeng Zhao,Xiubing Huang,Ge Wang
The hydrogenation of dicyclopentadiene (DCPD) to synthesize tetrahydrodicyclopentadiene (THDCPD) is one of the key processes for the preparation of high-energy–density fuels, and the development of low-temperature and high-activity Ni catalysts is still challenging. In this work, hierarchical porous (HP) Ce-UiO-66 loaded Ni nanoparticles (NPs) catalysts were prepared based on the soft template method and liquid-phase in situ reduction method. The introduction of mesopores into Ce-UiO-66 can effectively enhance the transfer and adsorption of the substrate, and Ni NPs act as the main active centers. Furthermore, the modulation of the electronic structure of Ni NPs and the promotion of Ce-Ni interaction were effectively achieved by changing the in-situ deposition conditions. With a low loading of 3 wt% Ni NPs, the prepared 3Ni/HP-UiO-66 catalysts could achieve the observed complete DCPD conversion and 100 % selectivity of THDCPD within 1 h and retained good cycling stability. The results demonstrated preferential adsorption and hydrogenation of the norbornene ring, confirming the reaction pathway of the 3Ni/HP-UiO-66 catalyst for the hydrogenation of DCPD. The present work provides a guidance for exploring and designing non-noble metal catalysts for the hydrogenation of olefins and aromatics.
研究领域:
催化化学
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材料科学
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能源化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jing Peng,Yucheng Wu,Ning Long,Wei Shen,Yimin Jiang,Rongxing He,Ming Li
Designing efficient non-precious-metal bifunctional electrocatalysts is still challenging at present. Herein, the efficient Ce,F-Ni 2 P/CoP electrocatalyst for water splitting was successfully fabricated. As shown from the present investigation, the codoping of Ce and F in Ni 2 P/CoP induced the f-p-d gradient orbital coupling in the Ce-F-metal structural unit of the catalyst, significantly reducing the work function of the catalyst, which accelerated the reaction kinetics and improved the intrinsic catalytic activity. The catalyst exhibited the outstanding hydrogen evolution reaction (HER) activity in the full pH range and, especially in alkaline electrolyte, an ultra-low oxygen evolution reaction (OER) overpotential of 243 mV at 50 mA·cm −2 and an excellent HER overpotential of 88 mV at 10 mA·cm −2 were achieved. Moreover, Ce,F-Ni 2 P/CoP displayed an excellent overall water splitting (OWS) performance with η 10 = 1.52 V. DFT theoretical calculations also showed that the gradient orbital coupling resulted in the reduction of the work function of the catalyst. Our work provides a new understanding of designing and constructing high-performance catalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
ACS Catalysis
·
2024
·
IF 11.3
Peng Wang,Huafei Liao,Yang Chen,Xiaoxia Tao,Yuyan Gan,Huihui Deng,Yajie Fu,Yu Tang,Lizhi Wu,Li Tan
The PtIn nanoalloys with high surface energy are generally in a metastable state during harsh reaction conditions, and the ordered alloy structure is not conducive to exposure of surface Pt active sites. Herein, a strategy for restructuring the unfavorable PtIn alloy structure via heteroatom (Ce) doping is applied to advance an isolated Ptδ+ confined by the InCeOx nanoislands supported on SiO2. The as-synthesized catalyst with optimizing PtIn(Ce) ternary components exhibits ∼92.2% selectivity toward propylene and a stable propane conversion of ∼67.1% at 550 °C (kd of 0.010 h–1). As demonstrated by the comprehensive characterizations, the introduced proper amount of Ce species leads to the reorganization of the disadvantaged PtIn nanoalloy structure into the robustness of the isolated Ptδ+ site confined by the InCeOx nanoislands via inhibiting the In0 species generation. The introduced Ce species modulate the electronic interaction between Pt, In, and carrier, stimulating the capability to activate reactive molecules and at the same time acting as spatial physical barriers to restrict the migration of the isolated Ptδ+ species. This work proposed a facile and efficient strategy to promote the capability against sintering and coking of the Pt-based catalyst in propane dehydrogenation.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-9
·
IF 5.3
Xie Hui,Xie Sihui,Jiang Li,Lei Chenghong
Ce-MOFs with ferrocenedicarboxylic acid ligands (Ce-FcDC) as a bifunctional nanozyme exhibited high peroxidase (POD)-mimicking activity and superoxide dismutase (SOD)-mimicking activity. H 2 O 2 was produced from catalytic hydrolysis of peroxymonosulfate (PMS) using Ce-FcDC as a catalyst. The growth of E. coli and S. aureus were synergistically and more effectively suppressed by PMS in the presence of Ce-FcDC, in comparison with the sole use of PMS or Ce-FcDc. Under the catalysis of Ce-FcDC as the POD-mimicking nanozyme, PMS could be activated by Ce-FcDC to produce SO 4 •− and •OH and H 2 O 2 from the hydrolysis of PMS was further derivatized to O 2 •− and •OH. Ce-FcDC as the SOD-mimicking nanozyme causes O 2 •− to form H 2 O 2 . The generation of O 2 •− and •OH were confirmed using p-benzoquinone and isopropanol alcohol as the scavengers. The resulted SO 4 •− , O 2 •− , and •OH from combination of PMS with Ce-FcDC as an activator may have key roles for suppressing the growth of E. coli and S. aureus . This strategy could be an effective approach for suppressing the growth and preventing infections or pollutions of some other microbial cells as well. Graphical abstract
研究领域:
微生物学
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生物化学
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材料科学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xiaoshun Wei,Xuechun Yang,Yun Guo,Guohao Li,Yinzhong Liu,Lingli Cheng,Zheng Jiao
Being one of toxic and flammable volatile organic compounds (VOC), n-butanol has brought about many potential health risks, there is an urgent demand for highly sensitive detection techniques to monitor its concentration in occupational environments and the air. In this paper, Ce-doped MOF:ZnO sensors under UV activation for room-temperature detection of n-butanol were synthesized by the co-precipitation method and systemically characterized by XRD, SEM, HRTEM, and XPS. The sensitive performances were evaluated by the use of a WS-30A gas sensor measurement system. The results showed that Ce doping has significantly enhanced the sensitivity of the MOF:ZnO sensors, and the response value of the 0.08 % Ce-doped ZnO sensor has achieved to 397.30, which was 9.32 times higher than that of the pristine MOF:ZnO. And the response and recovery times were 17 and 117 s respectively, demonstrating a speedy detection capability. In addition, the sensor gained excellent stability and reproducibility with special selectivity for n-butanol. The comprehensive achievements of this research would be promising to promote the development of volatile organic compound detection technology and beneficial to the well application in the fields of environmental monitoring, industrial safety, and public health.
研究领域:
材料科学
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环境科学
·
传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 5
·51571
·
IF 3.125
Legang Chen,Zongxue Yu,Di Yin,Kunyao Cao,Chunxia Xie,Lijuan Zhu,Yong Jiang
Herein, a new strategy for improving epoxy coatings' anti-corrosion performance has been developed, which combined NH 2 -Ce-MOF with graphene oxide (GO) by hydrothermal method. First, the nanocomposite material's morphology and structure (GO-Ce-MOF) were confirmed by Fourier transform infrared, X-ray diffraction, TG, X-ray photoelectron spectroscopy, and scanning electron microscope (SEM) studies. The dispersity of the composite in the epoxy coating was evaluated by SEM and mapping analysis. Meanwhile, the anti-corrosion of as-prepared composite coatings was investigated in detail by the electrochemical impedance spectroscopy (EIS) and the Tafel polarization curve test. The results illustrated that 2.0 wt% GO-Ce-MOF/EP greatly enhanced the composite coating's anti-corrosion performance compared to other coatings. The reasons for the improvement of the anti-corrosion performance of the composite coating are attributed to the following two aspects: On the one hand, the addition of GO can provide a physical barrier to form a labyrinth effect to slow down the invasion of corrosive media into the metal substrate, on the other hand, the modification of GO can GO-Ce-MOF achieve better compatibility and dispersion in epoxy resin.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Guojiang Ye,Lie Wen,Hui Liu,Bochen Jiang,Xiaojing Sui,Chengzhi Zhang
s The development of high-performance bifunctional coatings with integrated anti-corrosion and anti-icing properties for extreme marine environments remains challenging. Herein, we report a novel superhydrophobic composite coating based on high-entropy oxides (HEOs), which ensures synergistic protection through multiscale structural engineering. A hierarchical micro/nanostructure with the incorporated vapor-phase nano-SiO₂ phase enhances the surface roughness (Ra = 0.877 μm) and superhydrophobicity (the water contact angle of 153.8° and the sliding angle of 4.5°) while also effectively suppressing sedimentation of HEO(Ce) particles in the epoxy matrix. The Ce³⁺/Ce⁴⁺ redox cycle within HEO(Ce) endows the passivation film with dynamic self-healing capability, yielding a low-frequency impedance modulus (|Z| 0.01 Hz) of 6.52 × 10 10 Ω·cm² after 7-day immersion in 3.5 wt% NaCl solution, which is 6 orders of magnitude higher than that of pristine epoxy. Furthermore, the coating demonstrates exceptional anti-icing performance, exhibiting a delayed ice nucleation time of 1134 s at -20 °C and maintaining the surface temperature above the freezing point under -10 °C under 1 Sun irradiation. The mechanical robustness tests confirm the retained superhydrophobicity after 5-meter sandpaper abrasion and Grade 1 adhesion strength conforming to GB/T 9286–2021 standard. Therefore, this work offers a physical barrier–chemical passivation–interface modulation synergistic strategy that effectively addresses the longstanding challenge of mutual constraints between corrosion resistance and icephobicity in conventional coatings, providing an innovative solution for marine equipment protection in harsh environments.
研究领域:
材料科学
·
腐蚀工程
·
表面化学
·
防除冰技术
·
海洋涂层
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 5
·675
·
IF 4.034
Lei Zhu,Xi Li,Zhiying Liu,Lin Yao,Peng Yu,Ping Wei,Yanhua Xu,Xingmao Jiang
Mn-Ce-Zr-O catalysts doped with varying Mn content were prepared and assessed for the catalytic combustion of chlorobenzene (CB). Nanosized MCZ-0.67 catalyst with amorphous phase exhibited a high and stable catalytic activity among the studied catalysts, achieving 90% CB conversion at 226 °C and withstanding stability tests, including time-based stability and the successive influence of various operating conditions. Meanwhile, the MCZ-0.67 catalyst used showed good recyclability by calcination in air. Characterization results suggested that Mn doping played a dominant role in improving the catalytic performance, resulting in larger surface area, better redox properties and greater amounts of surface active oxygen. In addition, the introduction of Zr was also indispensable for maintaining the good catalytic performance of catalysts. Finally, trace amounts of polychlorinated by-products during CB oxidation were monitored and the oxidation process was discussed.Keywords:MnOx-CeO2-ZrO2;catalytic combustion;chlorobenzene;active oxygen;product analysis
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）