CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhangyi Huang,Wanying Guo,Yang Shi,Ruichong Chen,Zhijun Wang,Yutong Zhang,Junjing Duan,Jianqi Qi,Haomin Wang
The Gd 2 Zr 2 O 7 (GZO)-based ceramic waste form exhibits promising potential for radioactive waste immobilization. However, the isomorphic immobilization capacity and irradiation effects of GZO-based ceramic waste forms with varying waste loads remain inadequately understood. This study employed a facile combustion method to synthesize ceramic powders and utilized conventional sintering with a relatively short dwelling time to fabricate GZO-based ceramic waste forms. We investigated the isomorphic immobilization behavior and He ion irradiation effects of the synthesized waste forms. The outcomes demonstrate that GZO effectively immobilizes simulated waste composed of 11 types of oxides, achieving a waste load as high as 50 wt% with a single pyrochlore phase and homogeneous element distribution. Under He + irradiation, aggravated structural degradations, including exacerbated lattice swelling, increased amorphization degree, and premature He bubble chain/microcrack formation, were observed in GZO-based waste forms with an increasing waste load.
研究领域:
材料科学
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核能工程
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放射化学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Le Fu,Bohan Wang,Yabin Zhu,Tielong Shen,Ying Deng,Guofu Xu,Jiwu Huang,Yucheng Feng,Liangting Sun,Wei Xia
Developing new radiation-resistant materials and understanding the structural damages caused by radiation are persistent goals of material scientists. Here, we report on the structural integrity and damage to ZrO 2 -SiO 2 nanocrystalline glass-ceramics after radiation with 1.4 MeV He ions at three different fluences: 1.0 × 10 16 ions/cm 2 (low), 5.0 × 10 16 ions/cm 2 (moderate), and 1.0 × 10 17 ions/cm 2 (high) at 500 °C. Grazing incident X-ray diffraction shows the tetragonal-ZrO 2 to monoclinic-ZrO 2 phase transformation induced by microstrain from the irradiation. The addition of yttrium indicated tetragonal-ZrO 2 stabilization effect during irradiation. The irradiated glass-ceramics show a Raman signal-enhancement effect probably related to the electronic structure changes of the amorphous SiO 2 component in the glass-ceramics. The formation of microcracks and lattice defects within ZrO 2 nanocrystallites is the main structural damage caused by irradiation. There was no observable amorphization of ZrO 2 nanocrystallites due to irradiation. No obvious He bubbles were detected, either. The formation of microcracks results in a decrease of in the nanohardness of the glass-ceramics. The results provide fundamental experimental data to understand the structural integrity and damage caused by radiation, which could be useful to design radiation‐resistant nanocrystalline glass-ceramics for extremely radioactive environments.
研究领域:
材料科学
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核能工程
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DOI
高影响因子
TALANTA
·
2016
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IF 4.035
Hai-Yan Song,Tian-Fang Kang,Li-Ping Lu,Shui-Yuan Cheng
Single or few-layer nanosheets of MoS 2 (MoS 2 nanosheets) and a composite composed of MoS 2 nanosheets, Au nanoparticles (AuNPs) and hemin (HE) (denoted as MoS 2 -Au-HE) were prepared. The composites possessed high synergetic catalysis activity towards the electroreduction of hydrogen peroxide. Furthermore, glucose oxidase (GOD) and AuNPs were used as marker of the complementary DNA (cDNA) strand of kanamycin aptamer to prepare a conjugate (reffered as cDNA-Au-GOD) that was designed as the signal probe. Both cDNA-Au-GOD and MoS 2 -Au-HE were applied to fabricate aptasensor for kanamycin. MoS 2 -Au-HE acted as solid platform for kanamycin aptamer and signal transmitters. AuNPs were employed as the supporter of cDNA and GOD which catalyze dissolved oxygen to produce hydrogen peroxide in the presence of glucose. Then cathodic peak current of H 2 O 2 was recorded by differential pulse voltammetry (DPV). The electrochemical reduction of H 2 O 2 was catalyzed by MoS 2 -Au-HE that was modified onto the surface of a glassy carbon electrode (GCE). The cathodic peak current of H 2 O 2 was highly linearly decreased with an increase of kanamycin concentrations from 1.0 ng/L to 1.0×10 5 ng/L, with a detection limit of 0.8 ng/L. This aptasensor can be used to detect kanamycin in milk with high specificity, sensitivity and selectivity .
研究领域:
生物化学
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分析化学
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纳米技术
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DOI
PubMed
高影响因子
Obesity
·
2015
·Vol. 24
·期 2
·368-378
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IF 3.734
Ziquan Lv,Jinquan Cheng,Suli Huang,Yanwei Zhang,Shuang Wu,Yangshen Qiu,Yijie Geng,Qian Zhang,Guanqin Huang,Quan Ma,Xing Xie,Shiquan Zhou,Tangchun Wu,Yuebin Ke
Objective Di(2-ethylhexyl) phthalate (DEHP) is reported to cause obesity and hypothyroidism in both humans and rodents, but the underlying mechanisms were largely unknown. This study was designed to clarify the effects and the mechanisms of DEHP on the pathogenesis of obesity and hypothyroidism and to discover the relationship between them. Methods Male C3H/He mice were treated with DEHP for 5 weeks, and the body weight, food intake, and body temperature were recorded during the exposure. After exposure, key organs and serum were analyzed by Q-PCR, Western blot, and ELISA. Results DEHP induced significant body weight gain and adipogenesis in all exposure groups except for 0.05 mg/kg. Marked hyperphagia and daytime hypothermia were also observed, which were accompanied by disturbed hypothalamic neuropeptide expression and reduced BAT UCP1 expression. In addition, WAT lipid metabolism was significantly deceased at low dose (0.5 mg/kg) and increased at high dose (50 and 200 mg/kg). DEHP also induced hypothyroidism, which was probably attributed to the combined effects of hepatic CAR activation and hypothalamic TRH inhibition induced by hypothalamic leptin resistance. Conclusions Chronic DEHP exposure could induce obesity by interrupting energy homeostasis, which is probably due to the synergistic effects of hypothyroidism and hypothalamic leptin resistance.
研究领域:
毒理学
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内分泌学
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代谢
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DOI
PubMed
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 20
·1629
·
IF 4.4
Penghui Lei,Qing Chang,Mingkun Xiao,Chao Ye,Pan Qi,Fangjie Shi,Yuhua Hang,Qianwu Li,Qing Peng
A new type of SiCf/TiC-Ti3SiC2composite was prepared by the Spark Plasma Sintering (SPS) method in this work. The phase transformation and interface cracking of this composite under ion irradiation (single Xe, Xe + He, and Xe + He + H ions) and subsequent annealing were analyzed using transmission electron microscopy (TEM), mainly focusing on the interface regions. Xe ion irradiation resulted in the formation of high-density stacking faults in the TiC coatings and the complete amorphization of SiC fibers. The implanted H ions exacerbated interface coarsening. After annealing at 900 °C for 2 h, the interface in the Xe + He + H ion-irradiated samples was seriously damaged, resulting in the formation of large bubbles and cracks. This damage occurred because the H atoms reduced the surface free energy, thereby promoting the nucleation and growth of bubbles. Due to the absorption effect of the SiCf/TiC interface on defects, the SiC fiber areas near the interface recovered back to the initial nano-polycrystalline structure after annealing.
研究领域:
材料科学
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核材料
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复合材料
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Rong Chen,Zhiting Liu,Tingting Cui,Xiaoying Zhang,Cai-Feng Wang,Guo-Xing Li,Gefei Wang,Su Chen
Hydrogels have attracted increasing attention in the biomedical field due to their similarity in structure and composition to natural extracellular matrices. However, they have been greatly limited by their low mechanical strength and self-adhesion for further application. Here, a gel-nanofiber material is designed for wound healing, which synergistically combines the benefits of hydrogels and nanofibers and can overcome the bottleneck of poor mechanical strength and self-adhesion in hydrogels and inadequate healing environment created by nanofibers. First, a nanofiber scaffold composed of polycaprolactone/poly(citric acid)-ε-lysine (PCL/PCE) nanofibers is fabricated via a new strategy of microfluidic electrospinning, which could provide a base for hyaluronic acid-polylysine (HE) gel growth on nanofibers. The prepared HE@PCL/PCE gel-nanofiber possesses high tensile strength (24.15 ± 1.67 MPa), excellent air permeability (656 m3/m2 h kPa), outstanding self-adhesion property, and positive hydrophilicity. More importantly, the prepared gel-nanofiber dressing shows good cytocompatibility and antibacterial properties, achieving a high wound-healing rate (92.48%) and 4.685 mm granulation growth thickness within 12 days. This material may open a promising avenue for accelerating wound healing and tissue regeneration, providing potential applications in clinical medicine.
研究领域:
生物医学工程
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材料科学
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组织工程
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伤口愈合
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产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
·
2024
·Vol. 18
·期 4
·1-10
·
IF 4.3
Li Ying,Wang Lu,Xie Junyan,Dai Yong,Gu Xuehong,Wang Xuerui
Membrane gas separation is considered an energy-saving technique to extract He from natural gas due to no phase change and room temperature operation. However, the membrane performance was strongly limited by the trade-off between permeance and selectivity. Herein, novel 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA)-2,2′-bis(3-amino-4-hydroxyphenyl) hexafluoropropane (APAF)-5-amino-2-(4-aminobenzene) benzimidazole (BIA) asymmetric membranes with a thickness of 300 nm were successfully prepared by the non-solvent induced phase separation method. The membrane performance was modulated by regulating dope solution compositions (e.g., tetrahydrofuran and polymer concentration). The ideal He/CH 4 selectivity was 124 and the optimized He permeance reached 87 GPU, beyond the current upper bound. He/CH 4 selectivity was 75 and He permeance was 73 GPU for the binary mixture feed containing 0.2 mol % He. The membrane showed good resistance to CO 2 and C 2 H 6 , which are the typical impurities in natural gas. The 6FDA-APAF-BIA membranes have good stability (> 160 h), which can provide great potential in He extraction from natural gas.
研究领域:
膜科学
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气体分离
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聚合物工程
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相分离
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节能分离
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材料科学
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DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2025
·Vol. 19
·期 10
·1-10
·
IF 4.5
Wang Lu,Li Zhiqiang,He Yangdong,Huang Chenzhi,Chen Shijin,Zhou Xianyun,Fan Xiaosong,Xie Wenjing,Wang Xuerui
Membrane gas separation is an energy-efficient approach to extract helium from natural gas. However, the limited separation performance shown as Robeson’s upper bound has hindered the techno-economic feasibility. This study introduces an advanced copolyimide membrane engineered for He extraction from natural gas. The membranes were facilely achieved by dip-coating the α -alumina substrates in the copolyimide solution followed by in situ thermal rearrangement. In addition to the rigid 5-amino-2-(4-aminobenzene)benzimidazole segments, the active ortho-hydroxyl groups were converted to benzoxazole rings, contributing to extra micropores. The membrane showed an improved mixture selectivity of 120 and He permeance of 23.5 GPU, far surpassing the performance of benchmark membranes for helium separation over CH 4 . The membrane also demonstrated long-term stability as evidenced by the continuous operation over 250 h. Additionally, the membrane exhibited resistance to impurities such as CO 2 and C 2 H 6 , enduring the asymmetric membranes promising for practical helium extraction from natural gas.
研究领域:
材料科学
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化学工程
·
气体分离技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Lingyu Liu,Qixuan Li,Luxin Sun,Aqib Riaz,Jianxin Li,Yingge Wang,Ingo Pinnau,Xiaohua Ma
One major challenge of helium recovery from natural gas by membranes is the development of materials offers both high He permeability and He/CH 4 selectivity. Here, ultrahigh performance He separation membranes were achieved by directly fluorination of a carbon molecular sieve (CMS) membrane that derived from pyrolyzing a polyimide at 550 °C. The FCMS550-60, fluorinated for 60 s, showed an unprecedented combination of high He permeability of 3432 Barrer and ultrahigh He/CH 4 selectivity of 5329 that is located far beyond any He/CH 4 trade-off lines. Additionally, it also exhibited outstanding mixed-gas separation properties with a He permeability of 1765 Barrer and He/CH 4 selectivity of 4114 at 20 bar. The largely enhanced He/CH 4 selectivity resulted exclusively from a boost in diffusion selectivity, which is originated from the formation of C–F bonds inside the micropores of the CMS membrane that remarkably enhanced the sieving ability of the FCMS membrane. This work provides a broad prospect for the application of FCMS membranes for He recovery from natural gas and other resources.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Jingxin Wu,Meng Zhang,Zhanqiang Li,Minzhong Huang,Huiming Xiang,Liyan Xue,Zhengming Jiang,Zhigang Zhao,Lianfeng Wei,Yong Zheng,Fan Yang,Guang Ran,Yanchun Zhou,Heng Chen
Nuclear engineering materials are required to possess outstanding extreme environmental tolerance and irradiation resistance. A promising novel pyrochlore-type of (Sm 0.2 Eu 0.2 Gd 0.2 Dy 0.2 Er 0.2 ) 2 Hf 2 O 7 high-entropy ceramic (HE-RE 2 Hf 2 O 7 ) for control rod was prepared by solid-state reaction method. The ion irradiation of HE-RE 2 Hf 2 O 7 with 400 keV Kr + at 400 °C was investigated using a 400 kV ion implanter and compared with single-component pyrochlore Gd 2 Hf 2 O 7 to evaluate the irradiation resistance. For HE-RE 2 Hf 2 O 7 , the phase transition from pyrochlore to defective fluorite is revealed after irradiation at 60 dpa. After irradiation at 120 dpa, it maintained crystalline, which is comparable to Gd 2 Hf 2 O 7 but superior to the titanate pyrochlores previously studied. Moreover, the lattice expansion of HE-RE 2 Hf 2 O 7 (0.22%) is much lower than that of Gd 2 Hf 2 O 7 (0.62%), indicating excellent irradiation damage resistance. Nanoindentation tests displayed an irradiation-induced increase in hardness and a decrease in elastic modulus by about 2.6%. Irradiation-induced segregation of elements is observed on the surface of irradiated samples. In addition, HE-RE 2 Hf 2 O 7 demonstrates a more sluggish grain growth rate than Gd 2 Hf 2 O 7 at 1200 °C, suggesting better high-temperature stability. The linear thermal expansion coefficient of HE-RE 2 Hf 2 O 7 is 10.7 × 10 -6 K -1 at 298–1273 K. In general, it provides a new strategy for the design of the next advanced nuclear engineering materials.
研究领域:
核工程材料
·
材料科学
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产品关联
DOI
高影响因子
FOOD AND CHEMICAL TOXICOLOGY
·
2026
·
IF 3.2
Wei Deng,Xiaojing Liu,Xiaobing Wu,Liu Yang,Huajun Zhong,Shijian Huang,Suli Huang,Guimiao Lin
BDE-47 causes abnormalities in key blood biochemical indicators. • BDE-47 causes a series of pathological changes in multiple organs. • BDE-47 leads to a dose-dependent decrease in liver elasticity. As a persistent organic pollutant (POP), 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) can accumulate through the food chain and enter the human body. Most existing studies have focused on short-term toxicity, with insufficient understanding of its chronic toxicity. In this study, a 6-month chronic exposure model was established in C3H/He mice via intragastric gavage. Hematological analysis and biochemistry tests were conducted, and organ coefficients along with histopathological changes were analyzed. Additionally, liver ultrasound elastography was assessed. The results showed that BDE-47 could significantly reduce renal index, serum levels of albumin (ALB), triglycerides (TG), and urea (UREA), increase uric acid (UA) levels, cause a dose-dependent decrease in liver elasticity, and lead to hepatic steatosis, atrophy of seminal vesicle epithelium, shedding of spermatogenic cells, and infiltration of splenic macrophages. Collectively, this study has confirmed that BDE-47 has significant chronic toxicity to mammals, providing a new basis for subsequent toxicological research and safety risk evaluation. Download: Download high-res image (240KB) Download: Download full-size image
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Wenji Zheng,Yuliang Tao,Fengting Yao,Zhixu Yun,Miao Yu,Xiaobin Jiang,Gaohong He
Metal organic frameworks (MOFs)-based mixed matrix membranes (MMMs) exhibit great prospect for He/CH 4 separation. However, it is still restricted by interfacial incompatibility-induced low filler loading and selectivity loss. This study proposed an interface fusion strategy by 6FDA-TFMB (PI) functionalized CF 3 -UiO-66 through NH 2 -UiO-66 bridging to achieve dual regulation of interface compatibility and molecular sieving. Crucially, this interface fusion strategy allowed a substantial increase in filler loading to 20 wt%, representing a 100% improvement over unfunctionalized CF 3 -UiO-66. The covalent bond formed between the amino group and the dianhydride improved the interfacial compatibility. The –CF 3 group on the UiO-66 reduced the pore size of UiO-66 and weaken the adsorption of CH 4 . The dual synergistic effect made the resultant MMMs exhibited excellent He permeability (165.2 Barrer) and He/CH 4 selectivity (394.1), representing improvements of 81.14% and 319.7%, respectively, compared with pristine 6FDA-TFMB membrane, approaching to the 2008 Robenson upper bound, surpassing most of the reported PI based membranes for He/CH 4 separation. This synergistic architecture not only validated the interface fusion engineering but also provided a foundation for designing efficient He/CH 4 separation materials with tailored microscopic properties.
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DOI
高影响因子
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