Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Liu Hao,Xiong Zhengye,Chen Qingxiang,Wang Luyan,Wang Chunxi
To evaluate the effect of irradiation on the preservation of potatoes, fresh potatoes were selected as the irradiation objects, and irradiated with 60 Co- γ radiation source for 0, 100, 200, 500 and 1000 Gy, respectively. During the irradiation, the well-packaged Y 1.79 Bi 0.01 Eu 0.2 MgTiO 6 novel thermoluminescence dosimeter material was placed together with the potatoes at the same position. Then, the potatoes were stored in the same temperature and humidity environment, and the quality changes of the potatoes were observed. The Y 1.79 Bi 0.01 Eu 0.2 MgTiO 6 material had good performance indicators, and was used to measure the irradiation dose of the potatoes. The experiment showed that irradiation could appropriately extend the storage time of potatoes, and gamma irradiation of about 1000 Gy could achieve the best preservation effect. The main pathogenic fungi that cause dry rot of potatoes were Fusarium solani and Fusarium oxysporum , and the appropriate dose of 60 Co- γ irradiation could effectively inhibit the spread and growth of these fungi.
研究领域:
食品科学
·
植物病理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 4
·506
·
IF 4.034
Shuquan Chang,Xian Wu,Jianzhang Lan,Zheng Li,Xiaohong Zhang,Haiqian Zhang
Quantum dots (QDs) have attracted great attention due to their unique optical properties. High fluorescence efficiency is very important for their practical application. In this study, we report a simple and efficient strategy to enhance the photoluminescence of water-dispersed thiol-capped QDs using γ-radiation. Three kinds of QDs with different surface ligands and cores (MPA-CdTe, MPA-CdSe and Cys-CdTe) were fabricated and irradiated by high-energy γ-ray in an aqueous solution. Their photoluminescence intensities were significantly enhanced after irradiation, which were closely related to the radiation dose and the structure of QDs. The positions of the fluorescence emission peaks did not shift obviously after irradiation. The mechanism of photoluminescence enhancement was discussed based on the results of photoluminescence (PL) spectra, UV-visible light absorption (UV-vis) spectra, transmission electron microscope (TEM), X-ray diffraction (XRD) patterns, Fourier transform infrared (FT-IR) spectra and X-ray photoelectron spectroscopy (XPS). This method can be employed to uniformly treat large batches of QDs at room temperature and without other chemicals.Keywords:quantum dots;luminescence enhancement;γ-radiation;thiol-capped
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xue Liu,Jianguo Deng,Fuhan Mai,Xin Li,Guohong Pu,Zhihua Deng,Lanxiang Ji,Xiaofeng Bai,Quanping Zhang,Yuanlin Zhou
The development of multifunctional radiation protection materials is crucial to ensure the safety of personnel and equipment in complex nuclear environments. Herein, a flexible radiation protection material integrating self-healing, thermal management, and behaviour response was prepared from Ta 4 C 3 T x MXene, Hydrogen-terminated phenyl polysiloxane, and Polyborosiloxane through esterification, “thiol-ene click” hydrosilylation reaction using L(+)-Cysteine as a bridge. The results showed that when Ta 4 C 3 T x MXene reached 20 wt%, the tensile strength of composite was 0.6321 MPa with the self-healing rate at 90.22 %. And the gauge factor of the material reached 25.83 at 100 % strain. This compensated for the gap between low strain and high sensitivity. Additionally, the multilayer structure of Ta 4 C 3 T x MXene and the absorption properties of Tantalum enable the material to attenuate γ-rays through absorption and scattering mechanisms. The attenuation capability of Ta 2 O 5 and Ta 4 C 3 T x MXene fillers for 59.6 KeV γ-rays was compared at the same Tantalum content. When the Tantalum content reaches 23.81 wt%, the Ta 4 C 3 T x MXene composite contains 20 wt% filler and has an attenuation coefficient of 0.757. Similarly, the Ta 2 O 5 composite contains 22.5 wt% filler and has an attenuation coefficient of 0.734. These results are significant for improving temperature and behaviour monitoring of workers in low-temperature nuclear environments.
研究领域:
材料科学
·
核工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Radiation Effects and Defects in Solids
·
2024
·
IF 1.1
Xue-Liang Ni,Jia-Le Li,Jia-Hao Lv,Zhi-Jie Liao,Chen Yang,Jun Zeng,Ying-Jun Li,Yin-Tao Li,Yuan-Lin Zhou,Quan-Ping Zhang
Achieving lead-free flexible materials with excellent γ-ray shielding as well as good mechanical properties are of significance to radiation protection safety and wear comfort of wearable articles. In this paper, polydopamine (PDA) is coated on Bi2O3 particles to form a typical core–shell structure Bi2O3@PDA, which is used to intensely bond bismuth oxide (Bi2O3) with chloroprene rubber (CR). It promotes the interface interaction between Bi2O3 and CR matrix, leading to the uniform dispersion of the filler and rich interfacial compatibility in CR/Bi2O3@PDA composite with as high as 50 wt% filling. Furthermore, 50 wt% CR/Bi2O3@PDA composite displays 53.6% shielding rate for 105 keV γ-rays. Meanwhile, its tensile strength and elongation at break are 9.6 MPa and 1424.8%, respectively, which are without sacrificing too much in comparison with the neat rubber. We propose a versatile route to prepare superior integrated properties of flexible materials, which can be used as wearable articles for radiation shielding.
研究领域:
材料科学
·
辐射防护
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Caifeng Zhao,Yahui Yang,Lin Luo,Sai Shao,Yiji Zhou,Ying Shao,Faqi Zhan,Jian Yang,Yaoyu Zhou
Oxygen vacancies and Ti 3+ defects in anatase TiO 2 have attracted great attention to address the insufficient optical absorption and photoinduced charge-carrier separation in photocatalysis . In this study, we demonstrate a superficial and innovative approach for synthesizing anatase TiO 2 nanoparticles with abundant oxygen vacancies via γ-ray irradiation reduction at room temperature. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) confirm that oxygen vacancies and Ti 3+ defects can be quantitatively and extensively obtained by merely regulating the irradiation dosage. Photoelectrochemical measurements suggest that oxygen vacancies and Ti 3+ defects promoted the separation of electron-hole pairs and then enhanced the photocatalytic degradation performance for organic pollutant. In comparison with TiO 2 (no irradiation), the sample (49.5 kGy irradiation) exhibited a 20.0-fold enhancement in visible-light decomposition of phenol. In addition, the results of scavenge experiments and mechanism analysis revealed that O 2 − are the dominant active species. The excited electrons generated at the conduction band and oxygen vacancy level of TiO 2−x -49.5 conspicuously contributes to generate much more ·O 2 − species. This novel study shows at room temperature, the γ-ray approach of irradiation leads to faster formation and quantification of oxygen vacancies in the semiconductor materials .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
Li Qiu-Hao,Zhou Qi,Wang Yun-Long,Chen Rui-Jie,Chen Chong
Nuclear energy provides a competitive path for reduction of CO 2 with water, whereas the high-efficiency utilization of radiolytically produced active species for oriented transformation remains challenging. Herein, we report the assembling of yttrium-decorated bimetallic MOFs via one-step hydrothermal strategy, which can act as a sensitized nanoreactor for syngas production under γ-ray irradiation. The flower-shaped CuNi-MOF matrix with tunable metal centers exposed plentiful cooperative active sites for CO 2 binding, and its nanopetals enabled the well dispersion of Y 2 O 3 nanoparticles on the surfaces. The introduction of high- Z element Y enhanced the secondary electron scattering and promoted the water radiolysis to produce more hydrated electrons (e aq − ), thus accelerating the initial CO 2 activation to CO 2 •− . Moreover, the in situ formed coupling interlayer provided a fast charge transfer channel between Y 2 O 3 and the MOF framework, which facilitated the interfacial electron migration for intermediate generation and subsequent CO 2 conversion. By regulating the contents of Cu and Y 2 O 3 within the nanocomposites, the affinity toward CO 2 and the product compositions could be modulated. As a result, the optimal 7CN-2Y catalyst achieved a high syngas evolution rate of 311.07 μmol g −1 with a H 2 /CO ratio of 2.7:1 at an absorbed dose of 4 kGy. The present study offered a feasible route for the efficient transformation of CO 2 into valuable chemicals and the design of viable catalysts for ionizing radiation. Graphical abstract
研究领域:
核能化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Bo Tian,Jie Zhao,Na Zhou,Jinfeng Li,Jizhuang Fan,Yunchen Du,Hongtao Zhao
Polymer-based radiation shielding materials are receiving more and more interests due to their desirable advantages in lightweight and maneuverability. Herein, we employ polypropylene (PP) as the matrix to construct γ -ray shielding composites through the embedment of PbO particles with a wet reaction melt blending method. From the changes in dynamic rheological behaviors and fracture surface of PP/PbO composite, it can be found that the gradient addition of PbO particles facilitates the formation of heterogeneous network structure with, and high PbO content may make the composites undergo a “liquid–solid” transition. Rheological temperature and time scanning show that both PbO content and heterogeneous network structure greatly contribute to the storage modulus ( G ') and thermal stability. The γ -ray ( 137 Cs) shielding tests manifest that BPP/PbO-4 has the best shielding performance, whose thicknesses of half value layer ( HVL ) and tenth value layer ( TVL ) are 0.32 and 1.05 cm, respectively, obviously smaller than those shielding materials ever reported. The analyses on effective atomic number ( Z eff ) and effective electron density ( N E ) reveal that the good shielding performance of BPP/PbO-4 benefits from its proper content and dispersion of PbO particles.
研究领域:
材料科学
·
辐射防护
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 3
·035035
·
IF 1.068
Ran Li,Yizhuo Gu,Yidong Wang,Zhongjia Yang,Min Li,Zuoguang Zhang
Epoxy resin matrix composites filled with dispersed micro and nano gadolinium oxide (Gd2O3) particles of different contents were fabricated in this study. The γ radiation shielding and mechanical properties of these micro and nano composites were evaluated by measuring mass attenuation coefficients at photon energies from 31 keV to 356 keV and flexural performances. Adding Gd2O3 obviously increases mass attenuation coefficients of composites, and the enhancement is stronger at low photon energy because of dominating photoelectric effect and k-edge of element gadolinium. Effect of Gd2O3 particle size on shielding property of composite was also discussed. The results show that nano-Gd2O3 composites have better ability to shield X and γ ray than micro-Gd2O3 composites, and an enhanced effect of ~28% is obtained with Gd2O3 content of around 5 wt.% at 59.5 keV. The reason is attributed to higher probability of interaction between γ-ray and nano particles. Especially, this effect is prominent in low particle concentration. For flexural property, nano-Gd2O3/epoxy composite show equivalent flexural strength and up to15% higher flexural modulus compared with micro-Gd2O3/epoxy composite. Based on these experimental results, nano-Gd2O3 reinforced epoxy composite is believed to be a promising novel radiation shielding material.
研究领域:
材料科学
·
辐射防护
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2017
·Vol. 228
·期 9
·1-6
·
IF 1.702
Fei Xionghui,Ling Yongsheng,Shan Qing,Hei Daqian,Jia Wenbao
Hexavalent chromium is a type of toxic chemical, it may cause allergies, hereditary genetic defects and cancer in humans by inhalation, and it is also a persistent danger to the environment. However, chromium metal, trivalent chromium and tetravalent chromium have low toxicities. In this study, semiconductor materials (quartz fibre and TiO 2 ) were added to a hexavalent chromium solution and the removal efficiency of hexavalent chromium as a function of the γ-ray irradiation dose, as well as the catalytic mechanism, was investigated. It was observed that the reduction of hexavalent chromium by γ-ray irradiation was largely promoted in the presence of semiconductor materials; the semiconductor materials act as catalysts under the gamma-ray irradiation. The hexavalent chromium in the solution can be converted to an insoluble precipitate by gamma-ray irradiation. These results are highly beneficial to apply semiconductor materials as catalysts for the removal of contaminants by radiation.
研究领域:
环境科学
·
辐射化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Hai-Bin Qiu,Yi Hu,Han-Juan Chong,Li Yuan,Guo-Ping Sheng
Ionic liquids (ILs) have been widely applied in chemical industry due to their unique properties. There is mounting evidence that they are toxic to various living organisms. Thus, it is crucial to develop methods to efficiently degrade and mineralize ILs to reduce their potential risks to the environment. In this work, the degradation of 1-butyl-3-methylimidazolium bromide ([C 4 MIM]Br), an imidazolium-based IL, was investigated in aqueous solution via 60 Co γ-ray irradiation. Results show that [C 4 MIM]Br could be effectively degraded by γ-ray irradiation. The irradiation-induced degradation of [C 4 MIM]Br fitted well to the pseudo-first-order kinetics model. The kinetic constant ( k ) increased linearly with the increase of irradiation dose rate (R 2 = 0.942) and solution pH value (R 2 = 0.974), and decreased with the increase of [C 4 MIM]Br concentration. Fourteen intermediates were detected using a liquid chromatography-mass spectrometry analysis. Based on these intermediate products, the degradation pathways and mechanisms of [C 4 MIM]Br were proposed. The free radicals (e.g., aqueous electron (e aq – ), hydroxyl radical ( OH), and hydrogen atom (H )) generated by γ-ray irradiation showed synergistic effects in the degradation and mineralization of [C 4 MIM]Br. Moreover, the toxicity assessment using C. elegans and Chlorella pyrenoidosa as model organisms demonstrates that sufficient γ-ray irradiation could effectively reduce the potential risks of [C 4 MIM]Br and its intermediates to the environment. These findings of this study may offer an efficient and environmentally friendly approach for effectively removing ILs and other persistent organic pollutants.
研究领域:
环境科学
·
放射化学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2017
·Vol. 30
·期 2
·231-238
·
IF 0.498
Lin Fu-xing,Zeng Kun,Yang Wen-xiu,Wang Mo-zhen,Rong Jie-lin,Xie Juan,Zhao Yu,Ge Xue-wu
Chitosan (CS) is expected to be an ideal gene carrier for its high biosafety. In this work, CS with low molecular weight were prepared through the γ -ray radiation on the acetic acid solution of CS. The CS chains were scissioned under the γ -ray radiation, and the molecular weight (MW) of CS decreased with the absorbed dose. When the absorbed dose was above 30 kGy, the molecular weight of CS decreased about an order of magnitude. The γ -ray-radiation-scissioned CS can effectively bind with plasmid (pEGFP) through complex coacervation method, forming pEGFP/ γ -ray-radiation-scissioned CS complex particles with a size of 200–300 nm. The complex particles have good stability and little cytotoxicity. The in vitro gene transfection efficiencies of the pEGFP/ γ -ray-radiation-scissioned CS complex particles were investigated by fluorescence microscope and flow cytometry. The results showed that the gene vectors using γ -ray-radiation-scissioned CS as the carrier will possess better gene transfection efficiency than those using natural high-MW CS as the carrier. The higher the absorbed dose, the smaller the MW of CS and the better transfection efficiency of the corresponding gene vector. This work provides a green and simple method on the preparation of CS-based gene vectors with high efficiency and biosafety.
研究领域:
生物材料学
·
基因治疗
·
放射化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Daoxi Wang,Haiting Shi,Shuaitong Liang,Ruiqi Shao,Shuo Wang,Wenhui Cui,Wei Wang,Zhiwei Xu
Garnet-type lithium–lanthanum–zirconium–oxygen (LLZO) oxide solid-state electrolytes (SSEs) have become one of the most promising SSEs for future deep space exploration because of their excellent energy density and mechanical strength. However, the effects of high-energy irradiation on LLZO-type oxide SSEs in the space domain are still unknown. To this end, the Ta-doped lithium–lanthanum–zirconium–tantalum–oxygen (LLZTO) SSE with high ionic conductivity at room temperature was prepared by a solid-phase reaction method, and the γ-irradiation effects on the cell structure and performance (ionic conductivity, hardness, and elastic modulus) of the LLZTO SSE were investigated in detail. The results show that the γ-irradiated electrolyte did not produce other heterogeneous phases, but the lattice spacing was subsequently reduced, which would be detrimental to the ionic transport in the lattice. In addition, the neutron diffraction data also illustrate that irradiation does not change the cell structure of the LLZTO SSE, but the decrease in Li1 occupancy at the tetrahedral-24d site will have a detrimental causal effect on ion transport. The impedance test at room temperature further demonstrated that after γ-irradiation, the total resistance of LLZTO becomes larger and the ionic conductivity of the corresponding irradiated samples tends to decrease. Fortunately, the ionic conductivity retention of irradiated samples at low temperatures was higher than that of unirradiated samples (48.45 > 29.9%). The test results of nanoindentation indicate that the irradiated samples have high mechanical properties at a low load (2 mN), which can effectively prevent lithium dendrite penetration, and this is supported by the low electronic conductivity of the irradiated samples at room temperature. The first use of γ-irradiation to probe its effect on the cell structure and properties (electrochemical and mechanical) of the LLZTO oxide SSE has important research implications for the development of oxide SSEs for aerospace applications.
研究领域:
材料科学
·
航天工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）