NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
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2013
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IF 1.266
Chundong Li,M.M. Mikhailov,V.V. Neshchimenko
The effects of proton and electron ( E = 100 keV, F = 5 × 10 15 сm −2 ) exposure on the reflective spectra of SiO 2 micro- and nanopowders in wavelength range from 250 to 2500 nm have been investigated. It has been established that the reflectance and radiation stability of nanopowders is less than that of micropowders. This effect is caused by the high concentration of radiation defects, which act as surface absorption centers ( E s ′ centers) near the energies 5.47 and 4.45 eV, and peroxide silicon defects ( Si O O Si ) near the energy 3.84 eV.
研究领域:
材料科学
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辐射物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2021
·
IF 4.527
Junge Chen,Yang Yu,Aihu Feng,Le Mi,Huixin Xiu,Yun Yu
Thermal control coatings (TCCs) are an essential part of the thermal control systems in the spacecraft. Solar absorptance and emittance are the key performance parameters of TCCs. To develop an ultra-low solar absorption and stable inorganic TCCs for surface radiator, different TCCs were prepared by co-sintering ZnO and SiO 2 nanoparticles to form Zn 2 SiO 4 /SiO 2 pigment in this work, and the optical properties and radiation stability were systematically studied. It is found that the coating based on composite pigment has high reflectivity in the ultraviolet band and excellent optical performance possessing the low solar absorption of 0.06. In addition, the Zn 2 SiO 4 /SiO 2 coating demonstrates the highest proton and electron radiation stability because that SiO 2 between Zn 2 SiO 4 particles acts as the relaxation center of the defects caused by radiation.
研究领域:
材料科学
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航天工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Surface Investigation
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2020
·Vol. 14
·期 2
·253-259
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IF 0
Yurina V. Yu.,Neshchimenko V. V.,Chundong Li
Abstract — A comparative analysis of the diffuse reflectance spectra in the range from 200 to 2500 nm is carried out on aluminum-oxide microspheres, microparticles and nanoparticles exposed to irradiation with protons and electrons with energies of 100 keV. It is established that the amount of intrinsic absorption centers in the microspheres is higher compared to microparticles and nanoparticles, while the concentration of induced absorption centers is lower.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Ying Wang,Bowen Hu,Qing Li,Yijie Wu,Xintong Shang,Pinghua Yang,Yimin Cai,Lihua Yuan,Wen Feng
A challenge in nuclear waste remediation is the construction of extraction systems with exceptional stability and remarkable selectivity under harsh conditions, to achieve efficient uranium separation from nuclear wastewater. In this work, two novel N, O-hybrid extractants, L1 and L2 attaching two or one pyrrolidone groups to the phenanthroline skeleton were synthesized and applied in uranium extraction. Solvent extraction tests showed that these ligands in 3-nitrobenzotrifluoride can extract uranium with fast kinetics, high selectivity over twelve competing ions, and facile stripping. Slope analysis indicated that each uranyl ion binds to one ligand during extraction, and the extraction conforms to the cation exchange mechanism. The effect of temperature on uranium extraction was also carried out to determine the thermodynamic parameters. Notably, outstanding radiation stability was demonstrated for these extractants even after being exposed to 500 kGy γ ray irradiation. In addition, NMR titration and DFT calculations were performed to understand the complexation behaviors between ligands and uranyl ions. This study reveals the potential of these two phenanthroline-based extractants for the use in uranium separation from nuclear wastewater.
研究领域:
核化学与化工
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环境科学
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计算化学
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
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2024
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IF 4.8
Zhihao Wu,Hang Shen,Yi Wang,Limin Jiao,Yizhi Chen,Xinglong Gong,Mingzhang Lin
Fluorine rubber (FKM) stands as a pivotal sealing material extensively employed in aerospace and nuclear industries. However, its efficacy will be seriously affected by ionizing radiation. Enhancing its radiation resistance becomes imperative to uphold the stability and safety of associated equipment. This study introduced hexagonal boron nitride ( h -BN) into the FKM as radioprotective fillers through mechanical blending. The interfacial interaction between matrix and h -BN, the mechanical performances, thermal properties, and radiation stability of composites were systematically examined. Noteworthy findings highlight the presence of robust interaction forces between h -BN and the matrix, leading to increased crosslink density and improved mechanical properties. The tensile strength of composite with 10 phr fillers (BN/FKM-10) increased by 30% compared to that of pure FKM. Simultaneously, the introduction of h -BN greatly enhanced thermal conductivity and radiation stability. The absorbed dose required to achieve a 50% reduction in elongation at break of BN/FKM-10 surpassed that of FKM by 1.69 times. These results underscore the potential of incorporating h -BN to simultaneously enhance the mechanical performance, thermal property, and radiation resistance of fluorine rubber. Highlights The chemical interaction force between h -BN and FKM was confirmed. FKM composites tensile strength was enhanced by h -BN as an additive crosslinker. The incorporation of h -BN improves FKM composites thermal conductivity. The radiation resistance of FKM composites has been improved with h -BN.
研究领域:
材料科学
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航空航天工程
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核工业技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xiong Zhang,Renyan Huang,Zhongyuan Zhang,Hao Lu,Hongyuan Sha,Xieming Xu,Yi Zheng,Xin Huang,Shuaihua Wang,Shaofan Wu
Lead-free perovskites have recently attracted huge interest in direct-type radiation detectors. In this work, a zero-dimensional perovskite-like halide Cs 2 CoCl 4 is prepared by an all-water solvent method that enables large-area production for X-ray imaging. The outstanding radiation detection performance of Cs 2 CoCl 4 is demonstrated by a single crystal device. Specifically, the X-ray detector based on Cs 2 CoCl 4 single crystal has a large carrier mobility-lifetime ( μτ ) product of 1.63 × 10 −4 cm 2 V −1 under X-ray irradiation, a sensitivity of up to 2421 μC Gy air −1 cm −2 at 287.8 V mm −1 , and it could detect X-ray as low as 54.3 nGy air s −1 . In addition, Cs 2 CoCl 4 @fiber composite films prepared by aqueous solution evaporation are used to confirm the feasibility of X-ray imaging application. The uniformity of composite films is achieved by adjusting pressure and concentration to control homogeneous nucleation and growth. Excitingly, a switching test lasting more than 300 min at a dose rate of 1169 μGy air s −1 indicates that Cs 2 CoCl 4 @fiber has excellent radiation stability. As a proof of concept, a 5 × 5 pixelated detector array is prepared to achieve a clearly observed outline of the imaged object, offering an inspiring material design strategy conducive to realizing environmentally friendly film devices.
研究领域:
材料科学
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辐射探测
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医学影像
✓ 已验证
产品关联
DOI
高影响因子
Photonics Research
·
2021
·Vol. 9
·期 12
·2369-2380
·
IF 7.08
Yao Tong,Qin Wang,Heng Yang,Xiaoting Liu,Enrou Mei,Xiaojuan Liang,Xiaojuan Liang,Zhijun Zhang,Zhijun Zhang,Weidong Xiang
As an emerging scintillation material, metal halide perovskite (CsPbX3) has been deemed the most potentially valuable candidate in X-ray detection and medical imaging. Nevertheless, it is a continuing challenge to implement efficient radioluminescence (RL) with high radiation stability and moisture resistance. Moreover, the optimized luminescence properties and excellent uniformity of CsPbX3 glass are also key points for obtaining perfect X-ray images. Herein, we have successfully precipitated Eu3+-doped CsPbBr3 nanocrystals (NCs) with improved photoluminescence quantum yield (≈58.6%) because partial Eu3+ entered the perovskite lattice in a robust borosilicate glass matrix by in situ crystallization. The small amount of Eu addition made the lattice of NCs shrink and promoted uniform distribution of CsPbBr3 NCs in the glass, which effectively reduced the light scattering of the sample. Subsequently, multimodal RL intensity of the CsPbBr3/CsPbBr3:xEu NCs glasses (CPB-0Eu/CPB-xEu) as a function of X-ray dose rate showed a superlinear relationship to the benefit of obtaining satisfactory X-ray images. Also, the outstanding radiation stability and water resistance of CPB-xEu were confirmed due to the protection of the robust glass matrix. Finally, an X-ray imaging system using a CPB-xEu scintillator was constructed, and the spring in the opaque sample was legibly detected under the motivation of X-rays, indicating that CsPbX3 glasses possess extensive application prospects in terms of X-ray detection and medical imaging.
研究领域:
材料科学
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医学影像学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2019
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IF 4.018
Jinpeng Lv,Jianqun Yang,Xingji Li,Ziyi Chai
ZnO and TiO 2 particles are typical pigments used in solar reflective coatings . In this letter, the radiation stability of ZnO and TiO 2 particles within submicron (several hundred nm) and nanoscale (30 nm) size is systematically studied. We reported previously that the 90 nm and 300 nm ZnO particles have nearly a same radiation tolerance (Phys. Status Solidi B 2017, 254, 1600411). Unexpectedly, we found herein that the 30 nm oxides have significant higher radiation tolerance in relation to the submicron particles. Detailed analysis illustrated that the abundant native defects and surface/interface states in oxides nanocrystals , in-situ restored radiation damage through rapid diffusion and annihilation with implantation created vacancies. This work would be beneficial for developing nanoscaled oxides and devices used for space and nuclear radiative environments.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DEFECT AND DIFFUSION FORUM
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2018
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IF 0
Vitaly V. Neshchimenko,Chun Dong Li,Mikhail M. Mikhailov,Andrei Dudin
The effect of protons exposure on the diffuse reflectance spectra of the zinc oxide with different shape particles has been investigated. Particles were micro-, nanocrystals, star and flower shape particles. The synthesis of the particles was carried out by the hydrothermal method using zinc acetate chemicals. The surface morphology, surface area and crystal structure of the particles have been investigated. Evaluating the changes in spectral reflectance it was found that the radiation stability of the micro particles is higher than the radiation stability of the other nanostructured particles. The high stability of the micro particles optical properties is due to the effect of low accumulation of radiation-induced defects.
研究领域:
材料科学
·
辐射物理学
✓ 已验证
产品关联
DOI
Nanoscale
·
2018
·Vol. 10
·期 47
·22335-22347
·
IF 7.233
Vitaly Neshchimenko,Chundong Li,Mikhail Mikhailov,Jinpeng Lv
Zinc oxide has multifunctional physical properties depending on its microstructure and morphology. Herein, we reported the in situ investigations of the radiation stability of ZnO particles with hollow, ball, star and flower shapes under electron and proton irradiation. 100 keV protons with a fluence of 5 × 1015 cm−2 and 50 keV electrons with fluence ranging from 0.5 to 7 × 1016 cm−2 are employed to investigate the radiation stability of nanostructured ZnO particles. In situ reflectance, X-ray photoelectron spectra and photoluminescence were characterized in the irradiation environment to avoid the effects of the atmospheric environment on radiation induced defects. The experimental results reveal that, compared to the other shapes, the hollow structure with the best radiation stability due to the hollow structure facilitates the decrease of the accumulation of radiation defects. This study clearly demonstrates the promise of ZnO hollow particles as a plasmonic nanostructure for achieving high radiation stability, and they could be easily employed to serve as the radiation stability pigment for coatings.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Qiqi Guo,Yizhi Chen,Peng Zhang,Yusen Liu,Yifan Li,Yu Yang,Qi Cao,Mingzhang Lin
In the present work, the effects of four neutral phosphorus extractants (TBP, TAP, THP, TEHP) with different molecular structures on the extraction behaviors towards U(Ⅵ) and radiation stability were systematically studied. The results of the batch extraction and the γ-radiolysis experiments manifested that the extraction performance and radiation stability of the four extractants followed the order of TEHP > THP > TAP > TBP. Moreover, DFT calculations and Multiwfn software were utilized to analyze the properties of the extractants. The electrostatic potentials (ESP) and frontier molecular orbital of extractants indicated that the nucleophilic ability was ranked as TEHP > THP > TAP > TBP. The analyses of quantum theory of atoms in molecules (QTAIM) and Wiberg indices (WBIs) revealed that the UO 2 2+ ions exhibited stronger complexation ability with O atoms in TEHP compared to the other three extractants. The bonds between UO 2 2+ ions and extractants were primarily ionic in nature. From the energetic perspective, the thermodynamic energy demonstrated that the Gibbs free energy of TEHP in aqueous solution was the most negative, implying that it should be easier to combine with UO 2 2+ . This work elucidates that the increase of alkyl chain length and the presence of branched chains can enhance the extraction performance and radiation stability of neutral phosphorus extractants. It not only lays the theoretical foundation for designing novel organic phosphorous extractants with superior extraction performance and high radiation stability, but also provides scientific basis for the extraction process of uranium in spent nuclear fuel reprocessing.
研究领域:
化学工程
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核化学与放射化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Liang-ping Xiong,Kai Lv,Mei Gu,Chu-ting Yang,Feng-cheng Wu,Jun Han,Sheng Hu
A kind of unconventional metal–organic framework (UMOF), hafnium phosphonates (HfP) with different molar fractions P/(P + Hf), were synthesized via a template-free, one-pot method by the reaction between hafnium chloride octahydrate (HfOCl 2 ·8H 2 O) and amino tris(methylenephosphonic acid) (ATMP); the structure, sorption behaviors for actinides, acid resistance and radiolytic stability of the synthesized materials were then investigated. The results reveal that the materials were amorphous and porous, and HfP with a higher molar fraction P/(P + Hf) exhibited a higher sorption capacity for Th(IV) and U(VI). In 3 mol/L HNO 3 , K d values of HfP for Th(IV) and U(VI) were 5.84 × 10 4 and 5.09 × 10 3 mL/g, respectively, indicating superiority to other MOF materials in strong acidic solution. The K d values for tracer amounts of radioactive 239 Pu and 237 Np were 1.19 × 10 4 and 6.68 × 10 3 mL/g in 4 mol/L HNO 3 , respectively. This is the first case of applying MOF materials to capture transuranic elements from a strong acidic medium. Moreover, the materials were quite stable when dipped into strong acidic solutions, while their sorption performances were unexpectedly enhanced after irradiated by high dosage γ-rays in air. All the results support its anticipated application as actinide sorbents in many practical nuclear processes.
研究领域:
核化学与放射化学
·
材料科学
✓ 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）