Functional Materials Letters
·
2022
·
IF 1.49
Zhen Mou,Hongyan Zhou,Shuang Wu,Wenqi Tang,Yiyu Zhang,Kejie Zhang,Zhipin Zhou
Three kinds of CeO 2 /ZnO nanocomposites were successfully prepared by the hydrothermal method. The morphology and composition tests show that the CeO 2 cubic nanoparticles with a side length of about 10 nm are uniformly loaded on the irregular ZnO nanosheets. Under ultraviolet light irradiation, CeO 2 /ZnO (1:5) has the best photocatalytic performance and the degradation efficiency of tetracycline (TC) is 97.2% within 140 min. In addition, with CeO 2 /ZnO (1:5) as photocatalyst, the degradation rate of TC only decreased by 1.3% after 6 cycles, indicating that CeO 2 /ZnO (1:5) has excellent photocatalytic stability. Therefore, the CeO 2 /ZnO (1:5) nanocomposite has a bright future for industrial application in wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 410
·期 21
·5113-5122
·
IF 3.307
Cai Pingyang,Yi Xiaofeng,Song Hongjie,Lv Yi
Material morphology-dependent cataluminescence (CTL) sensing characteristic and application are presented in this work. Hierarchical hollow microspheres CeO 2 were synthesized via the hydrothermal reaction of glucose and N, N -dimethyl-formamide (Glu-DMF). SEM, XRD, TEM, HRTEM and BET were used to characterize the prepared CeO 2 materials. Compared with CeO 2 cubics (CeO 2 Cubs), CeO 2 hierarchical hollow microspheres (CeO 2 HMs) show an enhanced CTL response to carbon disulfide. The response and recovery times of CeO 2 HMs-based CTL sensor towards carbon disulfide are about 8 s and 20 s, respectively. CeO 2 HMs exhibits a linear CTL response to carbon disulfide in the concentration range of 0.50~10 μg•mL -1 with an excellent sensitivity and selectivity. These results suggest that CeO 2 HMs will be a highly promising CTL sensing material for the detection and monitoring carbon disulfide.
CeO 2 hierarchical hollow microspheres (CeO 2 HMs) were synthesized via the hydrothermal reaction of glucose and N, N-dimethyl -formamide (Glu-DMF). Meanwhile, the prepared CeO 2 HMs shows commendable CTL response towards carbon disulfide. Due to the excellent analytical performance of designed CeO 2 HMs-based sensor for carbon disulfide, it has potential application value in various locations
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Ji Zhao,Jing-Hui Lv,Xian-Yong Wei,Qian-Qian Kong,Jia-Hao Li,Yang-Yang Zhang,Zhuang Li,Li Li,Zi-Chun Fan,Zhi-Min Zong
Ni/CeO 2 -La 2 O 3 with strong acidity was prepared by in - situ carbon templating (ISCT) and subsequent reduction with H 2 . The phase composition, specific surface area, morphology, acidity, and elemental valence composition of the catalyst were characterized. The catalytic methylation (CM I ) of phenol over the catalyst in different ratios of methanol to n -hexane was investigated under N 2 atmosphere. Over the catalyst, phenol was completely converted into 2,6-xylenol at 260 °C for 3 h via the CM I of phenol to o -cresol and subsequent CM I of o -cresol.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2021
·
IF 7.033
Yilun Sun,Meng Huang,Jingpeng Li,Zhiyuan Wang,Jianxin Zhou
The coke in the coils has a serious impact on the long-term and stable operation of the ethylene plant . Inhibiting coking of the cracking furnace is an important issue. In this paper, the Cr/CeO 2 coatings were prepared on the surface of 310S stainless steel by high-velocity oxygen-fuel (HVOF) spraying. The anti-coking performances of the bare 310S specimen and the Cr/CeO 2 coatings were tested by using the pyrolysis of naphtha . The results show that the coating with the thickness of 10–15 μm and a very small number of pores was built up by the obviously deformed splats and the coating/substrate interface is jagged bond. The white area on the surface of Cr/CeO 2 coatings mainly includes CeO 2 . However, the gray area is made of Cr or Cr 2 O 3 . Compared with the bare 310S specimen, the coking inhibition rates of coatings are 48.7%, 58.9%, 76.1% and 88.9% when the ratio of Cr and CeO 2 powder is 19:1, 9:1, 4:1 and 3:2, respectively. With increasing the relative ratio of CeO 2 , more white areas without coke are exposed. The CeO 2 surface can not only inhibit catalytic coking, but also promote the reaction of water vapor and coke.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Zhiwei Liu,Yan Zhao,Shuang Li,Tianpei Sun,Hansong Liu,Kai Wang,Xiangbao Chen
In this paper, a two-dimensional MXene loaded with CeO2 nanoparticles was successfully synthesized through a simple solvothermal sintering method. The nanocomposite obtained by mixing the CeO2/Ti3C2Tx MXene with paraffin at 30 wt % has a high reflection loss of −47.27 dB at a thickness of 1.9 mm and an effective absorption bandwidth of up to 4.22 GHz which is higher than that of a similar absorbing system. By adjusting the composition ratio and the thickness of the system, almost all S, C, X, and Ku bands can be covered. Its excellent performance benefits from the abundant oxygen vacancies brought by CeO2 nanoparticles in which Ce3+ and Ce4+ ions coexist and the rich microinterfaces brought by the CeO2–C–Ti3C2Tx sandwich structure. In addition, CeO2/Ti3C2Tx MXene nanocomposites also have high thermal stability. This research extends the thought on the design of high-performance microwave-absorbing materials.
研究领域:
材料科学
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电磁材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qianqian Guo,Bin Zhang,Zhengfang Yang,Qisheng Wang,Qing Wang,Guanbin Wen
This study employed rare earth element, Ce, and elemental Fe to prepare antimicrobial nanocomposites with enzyme-like activity. The materials were characterized by SEM, EDS, and XRD, as well as antimicrobial and drug resistance properties were tested. XPS analysis revealed a change in the valence state of Ce 3d in CeO 2 /Fe 2 O 3 on addition of Fe. Furthermore, UV–vis spectral results showed that the band gap of the composite material decreased after composite formation. The creation of a heterogeneous structure was a significant factor responsible for enhancing the antimicrobial performance. The study analyzed the peroxidase (POD) activity of the materials using UV–vis spectroscopy. Results showed that the enzyme activity of the composites was significantly enhanced, compared to the individual materials. This enhancement combined with H 2 O 2 to induce the production of ROS, resulted in a significant increase in the antimicrobial effect. The antimicrobial rate of the composite material exceeded 90 % at 250 µg/mL concentration. The antibacterial mechanism revealed that it primarily operated through synergistic effects of ROS, ionic dissolution, and damage by adsorption. It also had an apparent inhibitory effect on bacterial micro-organisms in water, which has wider application prospects.
研究领域:
材料科学
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微生物学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 3
·1766-1777
·
IF 4.186
Zehua Wu,Zhixin Zhang,Yong Jia,Fei Teng,Gang Li,Feng Wang,Yuqi Jin
Surface quality of fused silica, particularly surface defect and surface roughness, is a key factor affecting the performance of high-power laser and short-wave optical instrument, and so on. Herein, the super smooth surface of fused silica with roughness of sub-angstrom level and exceedingly few submicron defects was achieved by using ultrafine nano-CeO 2 with primary particle size less than 4 nm, low secondary particle agglomeration strength, and high Ce 3+ concentration. Furthermore, CeO 2 involve in polishing process in the form of primary particle was certified by experiment. Moreover, the cause for the generation of submicron defects on fused silica surface was investigated for the first time from the perspective of secondary particle agglomeration strength of CeO 2 . The concentration of Ce 3+ in CeO 2 was characterized by the redshift of the band-gap energy, and the analysis of material removal rate (MRR) and contact angle of polished fused silica shows that Ce 3+ enhances MRR through increasing the silanol group on fused silica.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 36
·12261-12269
·
IF 6.4
Ying-Jie Ma,Jing-Wen Wang,Guo-Chao Zhuang,Yang Zhang,Zi-Long Zhang,Ming-Yue Zhang,Guang-Bin Ji
To overcome the effect of high actuation voltages causing dielectric elastomer films to breakdown, fabricating films with excellent dielectric properties and high durability is the current focus. Previously reported dielectric elastomer films, nevertheless, still require better dielectric properties and suffer from a lack of self-healing properties, which reduces the service life of the films. In this work, polysulfide polyurethane–urea (PSPU) elastomers with self-healing properties were synthesized through the insertion of dynamic disulfide bonds into the polymer chain segments via hydrogen transfer reactions. In addition, PSPU-based composites were fabricated in which the filler was MXene loaded with CeO2 obtained using a hydrothermal method. Benefiting from dynamic disulfide bonding and multiple hydrogen bonding interactions, PSPU attained a self-healing efficiency of 95%. Moreover, the 5.25 vol% CeO2@MXene/PSPU composite exhibited a dielectric constant of 206 at 100 Hz, maintaining a loss of 0.19 while having a self-healing efficiency of 97.9%. In contrast to PSPU, the dielectric constant of 5.25 vol% CeO2@MXene/PSPU was 34 times higher than that of the former at 100 Hz. These distinctive properties promise to render the films an integral part of the actuator.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Haiyan He,Ping Yang,Jia Li,Ruixia Shi,Ling Chen,Aiyu Zhang,Yuanna Zhu
CeO 2 nanostructures with various morphologies were prepared through controlling preparation conditions via a hydrothermal method without any surfactants and templates. Cerium acetate, cerium chloride and cerium nitrate were used as cerium precursors to investigate the influence of anions on the growth process of CeO 2 nanostructures. The morphology evolution of CeO 2 and Ce(OH) 3 nanostructures indicates that the anions play an important role for the growth kinetics of resulting samples. Cl − and Ac − ions promoted the formation of one dementional (1D) CeO 2 nanostructures such as nanowires, nanorods and nano hexagonal prisms, while the oxidizing anion NO 3 - facilitated the synthesis of CeO 2 nanocubes. The hydrothermal reaction temperature is another key to govern the morphologies of CeO 2 nanostructures. The formation process of the nanostructures was explored and the possible growth mechanism was discussed. The variety of CeO 2 nanostructures represented inequable catalytic performance for CO oxidation . Because of different surface areas and structures, CeO 2 nanowires revealed the best catalysis performance while that of the nanocubes is the worst.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Fengxin Li,Yan Wang,Fumin Li,Mingqing Hua,Yan Huang,Huifang Cheng,Haibo Wu,Jiacheng Li,Jixing Liu
High-sulfur petroleum coke (HSPC), produced during petroleum coking process, has drawn ever increasing attention in the manufacture of graphite electrodes with the rise of new energy vehicles in recent years. However, its high sulfur content ( S > 3.0 wt.%) has become the major obstacle limiting this promising application. Herein, an innovative method is proposed to effectively lower the content of sulfur in HSPC through a series of polyoxometalate H 11 P 2 W 13 V 5 O 62 (HPA) coupled CeO 2 . The experimental results unveiled that the sulfur compounds in HSPC predominately existed as thiophene and mercaptan sulfur compounds, which could be oxidized to be the corresponding sulphone, sulphoxide and sulphate species. Moreover, the introduction of CeO 2 considerably promoted the dispersion of HPA, thereby exposing more reactive sites for the adsorption and activation of H 2 O 2 to produce active oxygen species, and thereafter endowing x%HPA@CeO 2 ( x = 20∼40) with excellent catalytic oxidative desulfurization (ODS) performance for HSPC. As a result, the sulfur content was significantly reduced from 4.46 wt.% to 2.12 wt.% at 70 °C and reaction time of 4 h due to the coupling effect between HPA and CeO 2 over 30%HPA@CeO 2 . The present study not only provides an innovative technological path for the efficient removal of sulfur from HSPC, but also promotes the understanding of catalytic ODS process of HSPC on the catalyst surface active centers.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Yan Zhang,Ruixia Shi,Ping Yang,Xueling Song,Yuanna Zhu,Qian Ma
The porous CeO 2 nanofibers with diameter of 100–140 nm were successfully synthesized by single-capillary electrospinning of a Ce(NO 3 ) 3 ·6H 2 O/PVP precursor solution, followed by calcination . The preparation parameters, including solution parameters and process parameters, affecting the spinnability and the morphology of nanofibers were investigated and discussed systematically. And the effects of different calcination temperatures on the microstructure CeO 2 nanofibers were also studied. A plausible mechanism was proposed to explain the formation process of the CeO 2 nanofibers. The N 2 adsorption-desorption isotherm analysis showed that the specific surface area and average pore size of the nanofibers were 195.75 g/m 2 and 2.4 nm, respectively. Moreover, as absorbent, the porous CeO 2 nanofibers adsorbed the MO effectively. The adsorption experiment indicated that the adsorption process can be divided into two stages, including quick adsorption and gradual adsorption. And the adsorption capacities were not only determined by the specific surface area, but closely related to the pore size. Finally, the adsorption data were modeled by the pseudo-first-order and pseudo-second-order kinetics equations. The results showed that the pseudo-second order kinetics could best describe the adsorption of MO onto the porous CeO 2 nanofibers.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2018
·Vol. 30
·期 11
·2744-2749
·
IF 2.851
Xin Xiao,YiHui Wang,Wei Tan,HongJie Liu,YangYang Duan,XiaoBo Zhang,DongEn Zhang,YouXiang Jiang,Jie Wang,JunYan Gong,JuanJuan Ma,Tao Yang,ZhiWei Tong
A novel multilayer-shaped CeO 2 with obvious electrocatalytic activity was synthesized using a simple heat treatment method. The structure and morphology of the multilayer-shaped CeO 2 were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Clenbuterol, a kind of β-agonist drugs, has recently become a serious issue to human body due to the illegal addition in the food additive for livestocks. The drug residue in the human body may cause muscular pain, cardiac palpitation, glaucoma, prostatitis, dizziness and and even death in old people. Therefore, the detection of clenbuterol (CLB) has a important significance. The as-prepared CeO 2 was found to have unique electrocatalytic oxidation activities towards clenbuterol (CLB). The electrochemical sensor was constructed by fixing stable nafion-modified multilayer-shaped CeO 2 film on a glassy carbon electrode. Compared with the CeO 2 -modified electrode and the nafion-modified electrode, the nafion-modified multilayer-shaped CeO 2 electrode showed better electrocatalytic performance for clenbuterol in HClO 4 solution. There was a good linear relationship between the oxidation peak current and the concentration of CLB between 0.39∼2.79 μmol/L, and the detection limit was 0.08 μmol/L (R=0.99). The nafion-modified multilayer-shaped CeO 2 electrode exhibited high stability and reproducibility.
研究领域:
分析化学
·
纳米材料科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）