Nature Communications
·
2021
·Vol. 12
·期 1
·1-8
·
IF 14.919
Lu Huangjie,Xie Jian,Wang Xin-Yu,Wang Yaxing,Li Zi-Jian,Diefenbach Kariem,Pan Qing-Jiang,Qian Yuan,Wang Jian-Qiang,Wang Shuao,Lin Jian
Radiation dosimeters displaying conspicuous response of irradiance are highly desirable, owing to the growing demand of monitoring high-energy radiation and environmental exposure. Herein, we present a case of dosimetry based on a discrete nanocluster, [Th 6 (OH) 4 (O) 4 (H 2 O) 6 ](TPC) 8 (HCOO) 4 ∙4DMF∙H 2 O (Th-SINAP-100), by judiciously incorporating heavy Th 6 polynuclear centers as radiation attenuator and organic linkers as photo-responsive sensor. Interestingly, dual-module photochromic transitions upon multiple external stimuli including UV, β-ray, and γ-ray are integrated into this single material. The striking color change, and more significantly, the visible color transition of luminescence in response to accumulating radiation dose allow an on-site quantitative platform for naked-eye detection of ionization radiations over a broad range (1–80 kGy). Single crystal X-ray diffraction and density functional theory calculations reveal that the dual-module photochromism can be attributed to the π(TPC) → π*(TPC) intermolecular charge transfer driven by enhanced π-π stacking interaction between the adjacent TPC moieties upon irradiation.
研究领域:
材料科学
·
放射医学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2020
·
IF 5.715
Abdul Haleem,Hui-Juan Li,Peng-Yun Li,Chuan-Shan Hu,Xi-Chuan Li,Jia-Yun Wang,Sheng-Qi Chen,Wei-Dong He
Macro-porous poly(lauryl acrylate) cryogel sheets as oil-sorbents were prepared through UV-radiation cryo-polymerizations in 1, 4-dioxane at low temperatures (−5, −2 and 0 °C) within 30 min. The influences of total monomer concentration, crosslinking monomer amount and polymerization temperature on the formation of cryogels were studied. The chemical structure and porous morphology were characterized through the techniques of Fourier transform infrared spectroscopy , thermal gravimetric analysis , contact angle measurement and scanning electron microscopy, confirming the features of high hydrophobicity , macro-porosity and good thermal stability. As well, the comparison between conventional gels prepared at room temperature and cryogels at lower temperatures was made, showing the higher rate of cryo-polymerization than conventional polymerization under the same UV-radiation condition. The swelling investigation was carried out with several organic solvents and oils. Enhanced performance of oil absorption was observed for those cryogels considering the absorption capacity and absorption rate. Variation of initiator amount and acrylate monomers could also modulate the absorption capacity. Those cryogel oil-sorbents exhibited wide adaptability, good reusability and high-temperature tolerance. Thus, this rapid and low-cost fabrication opens out a novel pathway to prepare efficient oil-sorbents used in waste water treatment .
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2013
·Vol. 24
·期 20
·205601
·
IF 3.842
Bin Xu,Bing Cai,Ming Liu,Hongsong Fan
This study explored a simple and fast method utilizing ultraviolet (UV) irradiation to synthesize CdTe/CdS/ZnS QDs in aqueous solution. Based on the reaction of photolysis and chemical deposition, the CdS and ZnS shell can be successively deposited around the thiol-capped CdTe cores through the interaction of Cd2+/Zn2+ and S2− produced by UV irradiation. The effect of the UV irradiation time, the ratios of thioglycolic acid (TGA)/Cd and TGA/Zn on the shell formation, shell stability, and the photoluminescence (PL) intensity of the QDs, was systematically investigated. Keeping the ratio of TGA/Cd, increasing UV irradiation time from 30 to 120 s, the blue-shift of the fluorescence emission peak position of CdTe/CdS QDs was observed. As the irradiation time increased continuously from 120 to 300 s, the red-shift of the emission peak position was observed. In the total irradiation time, the PL intensity of all the samples was enhanced. By applying 300 s irradiation on the samples, the emission peak was blue-shifted at a fixed TGA/Cd ratio of 1:1 and red-shifted at the ratios of 2:1, 4:1, 8:1, and 13:1. The PL intensity reached its highest value at the ratio of 2:1. The effect of TGA/Zn ratio on ZnS shell formation showed a similar progress. Under an optimum synthesized reaction condition, the particle sizes of CdTe core, CdTe/CdS core–shell and CdTe/CdS/ZnS core–shell–shell QDs were 2.6 nm, 3.4 nm, and 4.6 nm respectively. This study confirmed that with the core–shell–shell structure, CdTe/CdS/ZnS QDs had high anti-oxidability, photostability, and low toxicity. Therefore they can be further used in cell imaging efficiently.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2017
·Vol. 69
·期 2
·262-268
·
IF 1.258
Cai Long-Fei,Zhong Ming-Hua,Chen Wen-Yin,Xu Chun-Xiu,Wu Yun-Ying
A method was developed for the fabrication of microfluidic paper-based analytical devices (μPAD). This method was based on the silanisation of cellulose in filter paper using alkyltrimethoxysilane coupled with UV radiation. The filter paper sheet was hydrophobised by immersion in an octadecyltrimethoxysilane/heptane (OTMS/heptane) solution (0.25 vol. %) containing 5 vol. % of ethyl acetate (EtOAc). The hydrophobic-hydrophilic contrast was generated on the filter paper after the hydrophobised paper sheet was exposed to UV light with a metal mask creating the desired pattern on the sheet. The exposed area was oxidised to create a hydrophilic area, while the hydrophobic area was protected by the metal mask. The optimal conditions for the fabrication of μPAD were studied; these included ethyl acetate concentration ( C EtOAc ), immersion time, octadecyltrimethoxysilane concentration ( C OTMS ) and exposure time. This method is cost-effective and simple. In addition, different functional groups could be further grafted for various assay purposes. To demonstrate the feasibility of the μPAD in analytical applications, a flower-shaped μPAD with eight channels and eight detection units was fabricated and used to determine the nitrite content in pickled vegetables. The nitrite content (124 µg g −1 ) in the sample determined by this method compared favourably with that measured using a standard method (137 µg g −1 ).
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE ENGINEERING
·
2021
·
IF 3.169
Yan Zhang,Xinrui Zhu,Yujian Liu
A convenient fabrication approach is proposed for a durable superhydrophobic epoxy surface. By duplicating micro-rough topography of the template, covalently grafting with TiO2 nanoparticles, and treating with perfluorooctyltriethoxysilane, the surface shows superhydrophobicity with a high static contact angle (162.0°) and a low sliding angle (2.5°), respectively. And its WCA has hardly changed along with the pH value of solutions. Besides, the superhydrophobic property remains constant even after 144 h long-term UV radiation or 16 cycles of friction tests. The surface also exhibits superior self-cleaning resilience for organic contaminants of oleic acid, kerosene, lubricants, and vegetable oil by TiO2 photocatalysis degradation of pollution.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Yi Zhao,Jia Wang,Miaomiao Hu,Yunpeng Niu,Naixing Liang
Superhydrophobic coatings (SCs) can potentially reduce dust accumulation on the structure surfaces and mitigate environmental corrosion .In this study, a superhydrophobic coating composed of nano-SiO2, N-octyltriethoxysilane, and silane coupling agent was prepared for cement-based structures by green sol–gel method. By means of SEM, FTIR, XRD , EDS, and XPS, it was proved that cement-based superhydrophobic coatings were successfully formed on the surface of cement-based substrate. Two different techniques (brushing and replication) were used for fabricating cement-based superhydrophobic coatings (CBSCs), and their optimum preparation conditions were determined via orthogonal experiments. The obtained results revealed that the contact angle (CA) and sliding angle (SA) of the fabricated SCs reached 153° and 4°, respectively. Furthermore, the CBSCs exhibited outstanding self-cleaning properties and mechanical stability . Moreover, the chemical stability and UV-radiation resistance of the fabricated CBSCs were significantly improved compared with ordinary concrete.
研究领域:
建筑材料学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2022
·Vol. 148
·期 9
·04022047
·
IF 2.479
Xiulei Fan,Shang Shi,Yuan Xiang,Ya Xie,Qing Chen,Yangyang Yang,Jiaqiang Liu,Jiankun Zhang,Jun Hou
Degradable plastics, the substitute for conventional plastics, are becoming the new pollutant in the ocean. However, studies investigating the impact of freshwater and seawater on the basic aging process of microplastics and involving degradable plastics are still lacking. To accurately compare the potential hazards of degradable microplastics aging in seawater and freshwater, the role of salinity in the ultra-violet ray (UV) aging process of degradable microplastics (MPs) was explored in this study. Polylactic acid (PLA) aged under UV and 0‰, 10‰, and 40‰ salinities was taken as the subject. The results showed that salinity combined with UV accelerated the aging process, and PLA had more holes and cracks on the surface, larger specific area (SBET), and significantly more oxygen-containing functional groups and negative charges. The SBET of PLA aged under UV and 40‰ salinity was 2.97±0.11, 33% more than that aged by UV only. Additionally, salinity increased the adsorption capacity of PLA. The adsorption quantity of oxytetracycline (OTC) and Cu2+ by 40‰ salinity-aged PLA were 4.822 and 9.606 mg/g, 30% and 32% more than that aged by UV only. There was a drop in the desorption rate of OTC but a rise in that of Cu2+ by PLA aged in salinities. Moreover, the desorption quantity and rate of pollutants on PLA in simulated intestinal fluid were greater than those in water, and PLA might have a higher carrier effect on pollutants after aging under salinity conditions. These results showed that the potential hazard of PLA existing in seawater may be more serious than that in freshwater. This study also revealed the effect of salinity, enabling the environmental risk assessment of degradable MPs to be more scientific and more comprehensive.
研究领域:
环境科学
·
高分子科学
·
海洋污染研究
·
材料降解
·
水质与毒理学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Shiyu Duan,Nan Tian,Jicheng Zhang,Zhaoxuan Huang,Disheng Yao,Guoyuan Zheng,Jilin Wang,Yanhan Yang,Bing Zhou,Fei Long
Cs-rich FA-Cs perovskites theoretically have good humidity stability, photothermal stability, and suitable band gap for top cells of tandem solar cells. However, the phase separation of Cs-rich FA-Cs perovskite films occurs when the Cs content exceeds 30%, so it is difficult to synthesize pure Cs-rich FA-Cs perovskite films. Here, pure Cs-rich FA-Cs perovskite Cs1–xFAxPbI2Br(0 ≤ x ≤ 0.6) films without any impurity phase are first synthesized by reducing its phase formation energy barrier through assistance of PbI2(DMSO) and PbBr2(DMSO) admixtures. Compared with the pristine CsPbI2Br films, the humidity stability of those films is significantly improved and a remarkably enhanced power conversion efficiency (PCE) of 14.55% in α-Cs0.7FA0.3PbI2Br solar cells is achieved. Meanwhile, after annealing at 140 °C for 1 h or irradiating with ultraviolet light in N2 or dry air for 12 h, no phase separation and band gap change are found in Cs0.7FA0.3PbI2Br. The distributions of the PCE are similar, and the champion PCE of the corresponding Cs0.7FA0.3PbI2Br solar cells remains within 14.24–14.55%. This shows that α-Cs0.7FA0.3PbI2Br has good thermal and ultraviolet radiation stability.
研究领域:
材料科学
·
光伏技术
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Yiqing Wu,Xiangmei Ma,Bin Wang,Yanan Li,Shengtao Gao
The detrimental effects of ultraviolet (UV) and electromagnetic (EM) radiation on human health and physiological functions are well documented. The development of efficient shielding materials to mitigate these effects is therefore an urgent necessity. In this study, Zn/Ti-LDH@Ce/Fe-MOF@PPy composites were successfully prepared by hydrothermal synthesis and interfacial polymerisation. The properties of the composites were compared and analysed with those of pure Zn/Ti-LDH and Ce/Fe-MOF, and the results show that the prepared materials have excellent comprehensive properties, with a broad EAB of 5.2 GHz and a RL min of −46.2 dB at 14.8 GHz at the thickness of 3 mm, while exhibiting excellent UV shielding capability.The present study offers novel concepts and efficacious methodologies for the engineering of high-performance microwave absorbing and UV shielding materials.
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2024
·
IF 4.8
Jiawei Chen,Lin Du,Jian Liu,Lifeng Lin,Min Zhao,Lei Wang,Shaohua Chen,Jianzhi Huang
This study investigated innovative advanced oxidation processes (AOPs) combining far-UVC radiation at 222 nm with sodium percarbonate (SPC) to effectively remove methotrexate (MTX). UV222 significantly enhanced the direct photolysis and AOP degradation of MTX. •OH, CO3•–, and direct photolysis were primarily involved in the degradation, with their relative contribution being in the order •OH > CO3•– > direct photolysis. The fluence-normalized steady-state concentrations of both CO3•– and •OH in UV222/SPC were 7.76 and 4.05 times higher, respectively, than those in UV254/SPC. Transformation product analysis revealed distinct MTX degradation pathways and varied degradation rates of MTX substructures between the systems, with the order in UV254/SPC being 4-aminobenzamide (ABZ) > 2,4-diamino-6-(hydroxymethyl) pteridine (DHP) > l-glutamic acid (LG) and that in UV222/SPC being DHP > ABZ > LG, suggesting different reactivities of MTX moieties under each system. The presence of HCO3– and HA inhibited the MTX degradation, whereas NO3– promoted it, in the UV222/SPC system. In addition, UV222/SPC demonstrated a lower energy consumption compared to UV254/SPC, highlighting its potential for cost-effective wastewater treatment applications. This study offers new insights into the mechanisms of UV222/SPC systems and provides guidance for the development of technologies for the removal of emerging contaminants.
研究领域:
环境科学
·
化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2012
·
IF 1.227
Desheng Su,Wenqi Niu,Sheng Liu,Chengyin Shen,Chaoqun Huang,Hongmei Wang,Haihe Jiang,Yannan Chu
Photoemission electron attachment ion mobility spectrometry (PE-EA-IMS), with a source of photoelectrons induced by vacuum ultraviolet radiation on a metal surface , has been developed to study electron attachment reaction at atmospheric pressure using nitrogen as the buffer gas . Based on the negative ion mobility spectra, the rate constants for electron attachment to tetrachloromethane and chloroform were measured at ambient temperature as a function of the average electron energy in the range from 0.29 to 0.96 eV. The experimental results are in good agreement with the data reported in the literature.
研究领域:
物理化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Yang Yujie,Wang Jiaqiang,Yang Jie,Tong Lihuan,Cui Xiaodan,Fang Manman,Li Zhen
Organic radical materials have attracted significant attention for their unique photophysical properties and potential applications. Herein, we propose an auto triplet excitons supply system to generate radicals through the photoinduced electron transfer process for practical applications. By manipulating the n-π* transition and p-π conjugation, we achieve enhanced photoactivated phosphorescence coupled with rapid radical generation rates in the methoxy-substituted naphthylamine derivative ( OCH 3 -DNaAPh ) and fluorine-substituted naphthylamine derivative ( F-DNaAPh ), confirming the crucial role of the long-lived excitons supply in generating stable radicals upon UV irradiation. OCH 3 -DNaAPh is thus selected for implementing quantitative monitoring and an automated alarm system for UV radiation, featuring a two-stage risk warning model for excessive UV exposure. Furthermore, it acts as the photoinitiator for the polymerization of methyl methacrylate under UV irradiation, further enhancing phosphorescence emission above 473 K. The study describes a method to generate organic photogenerated radicals in the solid state, broadening their scope of practical applications.
研究领域:
有机光电子学
·
材料化学
·
光物理化学
·
功能材料
·
分子工程
·
光响应材料
✓ 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）