CONSTRUCTION AND BUILDING MATERIALS
·
2026
·
IF 8.9
Shuxia Wang,Jialong Cui,Ying Liu,Zhenyang Gao,Tenghao Mao,Jiehu Cui,Panxu Sun
A skeleton-interlocked PHP composite aerogel was developed by incorporating HGM/g-C 3 N 4 /MoS 2 hierarchical fillers into a poly(vinyl alcohol)/hydroxypropyl methylcellulose/polyvinylpyrrolidone matrix, forming an interlocked filler-skeleton framework. The optimized PHP/MH-gC 3 N 4 -2 retained a highly porous skeleton with a porosity of 89.86%, while showing a 197.57% increase in compressive strength, reductions of 58.12% and 89.66% in peak heat release rate and total smoke production, respectively, and a V-0 rating without flaming drips. It also exhibited a thermal conductivity of 0.197 W/(m·K) and a thermal diffusivity of 0.19 mm 2 /s, maintaining temperature differences of 82.7 °C and 38.7 °C in the 120 °C hot-plate and −30 °C cold-plate tests, respectively. After 10 absorption-squeezing cycles, PHP/MH-gC 3 N 4 -2 retained a water uptake capacity of 11.31 g/g and exhibited wet-state shape recovery. These results demonstrate a filler-skeleton interlocking strategy for constructing fire-safe, thermally protective, mechanically robust, and water-responsive polymer aerogels.
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产品关联
DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2021
·Vol. 98
·期 1
·132-140
·
IF 3.421
Yuanyuan Peng,Zhipeng Wang,Jhair Peña,Zhiming Guo,Jinfeng Xing
Nanogel is an important kind of biomaterials applied for wound dressings, drug delivery, medical diagnostics and biosensors. The properties of nanogels closely depend on the density of the crosslinking network. In this study, the role of triethanolamine (TEOA) in the effect on the crosslinking degree of nanogels based on poly(ethylene glycol) diacrylate (PEGDA) was investigated and illustrated. The effect of TEOA on the process of photopolymerization at 532 nm and properties of the nanogels was systematically investigated by using UV-vis spectroscopy, FT-IR spectroscopy, 1 H NMR, DLS, SEM, AFM and DSC. In brief, the double-bond conversion of photopolymerization and the crosslinking degree of nanogels can be effectively regulated by TEOA.
研究领域:
材料科学
·
高分子化学
·
生物材料
·
纳米技术
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DOI
PubMed
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2018
·Vol. 95
·期 4
·1045-1051
·
IF 2.214
Xian Zhang,Longfei Chen,Lvfen Gao,Xuesong Gao,Nan Li,Yuwei Song,Xinke Huang,Shaoqiang Lin,Xiaoyu Wang
Comparison of the fluorescence intensity caused by the accumulation of PpIX in endometrial cancer xenografts in nude mice after low-dose 5-Aminolevulinic acid (ALA) injection combined with siRNA transfection was mediated by ultrasound microbubbles and polyethyleneimine (PEI) to explore the feasibility of the ultrasound microbubble technique as transfection agents. Knockdown of ferrochelatase (FECH) in human endometrial cancer xenografts in nude mice was performed by transfection with FECH-siRNA mediated by PEI and ultrasound microbubbles alone or in combination; then, low-dose ALA was injected. Subsequently, an in vivo animal imaging system was employed to detect the fluorescence intensity in xenografts. Red fluorescence was observed in xenografts given more than 6.25 mg kg −1 of ALA. When the dose of ALA was greater than 50 mg kg −1 , there was a significant difference in the fluorescence between tumor and other tissues. After the nude mice were transfected with siRNA and treated with low-dose ALA (1.0 mg kg −1 ), apparent PpIX fluorescence of the xenografts was observed, and the fluorescence intensity was PEI+ ultrasound microbubbles > PEI > ultrasound microbubbles. Ultrasound microbubbles in combination with PEI could generate a higher fluorescence intensity of PpIX than that obtained with ultrasound microbubbles or PEI alone, and ultrasound microbubbles could wholly or partially replace PEI under certain conditions.
研究领域:
肿瘤学
·
分子生物学
·
基因治疗
·
癌症研究
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DOI
PubMed
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2020
·Vol. 97
·期 2
·317-326
·
IF 2.721
Jingjie Tang,Dongting Huang,Fei Meng,Peng Li,Fang Peng,Junsheng Huang
Hypochlorite (ClO⁻) is of great importance either for the metabolism of living organisms or as disinfectant in daily life. However, improper concentration levels of ClO⁻ lead to serious health problems including erythrocyte damage, cardiovascular problems, neuron degeneration, lung/kidney injury and cancer. Therefore, a sensitive and selective detection method is required for the visualization and measurement of ClO⁻. In this work, a novel platinum(II) complex-based luminescent probe Pt-CHO was synthesized and utilized to detect ClO⁻. This “turn-off” probe exhibits high sensitivity, excellent selectivity, good pH stability, low limit of detection and instantaneous response ability. Moreover, the luminescent response is caused by the oxidation of aldehyde into carboxyl groups combined with the coordination of hydroxyl groups at the Pt center, which is rarely reported. The cell imaging of HeLa cells proved the considerable potential of the probe for ClO⁻ imaging in living cells.
研究领域:
生物化学
·
分析化学
·
医学诊断
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DOI
PubMed
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2017
·Vol. 94
·期 1
·179-185
·
IF 2.121
Heng Zhang,Shupeng Liu,Xiangfei Yang,Na Chen,Fufei Pang,Zhenyi Chen,Tingyun Wang,Jianshe Zhou,Fuji Ren,Xiaoyin Xu,Taihao Li
Tiny but highly efficient, a light-emitting diode (LED) can power a therapy device, such as a phototherapy device, and, at the same time, decrease the device's size requirements. In this study, a LED phototherapy device was designed to investigate the possible impact on wound healing using a mouse model and a cell line exposed to red and blue light. To enhance wound phototherapy, a gelatin sponge was fabricated. Results showed that the red and blue lights promoted cell growth and wound healing, while the blue light with a gelatin sponge protected the wound from infection in the early stages of wound healing. The LED phototherapy device combined with the gelatin sponge, therefore, has potential significance in clinical application for wound healing.
研究领域:
生物医学工程
·
细胞生物学
·
创伤修复研究
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2013
·Vol. 89
·期 5
·1262-1268
·
IF 2.287
Zhi-Yuan Yan,Bing Yan
Rare earth doped fluorides (BaMgF 4 , aYF 4 and BaYF 5 /BaLuF 5 ) have been synthesized and dispersed in an ionic liquid compound, (3-triethoxysilyl) propyl-3-methylimidazolium chloride (denoted as IM + Cl − ). Through the cohydrolysis and copolycondensatoin reaction between the alkoxy group (3-triethoxysilyl) of IM + and tetraethoxysilane in the presence of carboxylic acids (formic acid) as catalyst and water source, luminescent hybrid ionogels form subsequently. 1 H NMR spectroscopy, X-ray diffraction, transmission electron microscopy, scanning electron microscopy and especially up-conversion (UC) luminescence spectroscopy are used to characterize the precursors and the resulted hybrid ionogels. These hybrid ionogels exhibit the UC luminescence properties of immobilized rare earth fluoride nanocrystals (BaMgF 4 , NaYF 4 and BaYF 5 /BaLuF 5 ) doped Er 3+ /Tm 3+ , Yb 3+ .
研究领域:
材料科学
·
纳米科技
·
无机化学
·
功能材料
·
光子学
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2016
·Vol. 92
·期 6
·775-782
·
IF 2.008
Rongjun Su,Yanei Xue,Guangshan Zhang,Qiao Wang,Limin Hu,Peng Wang
The sulfide photocatalyst of Zn 0.9 Fe 0.1 S was successfully synthesized by a facile microwave-assisted method, and Zn 0.9 Fe 0.1 S photocatalysts were characterized using SEM, EDX, XRD and BET. The specific surface area of synthesized Zn 0.9 Fe 0.1 S is 78.1 m 2 g −1 , and total pore volume is 0.4 cm 3 g −1 . With bisphenol A (BPA) as a target pollutant, photocatalytic system of UV + Zn 0.9 Fe 0.1 S + H 2 O 2 was set up. Some influencing parameters, including H 2 O 2 dosage, initial pH value, initial concentration of BPA and Zn 0.9 Fe 0.1 S dosage, were investigated, and the stability of the Zn 0.9 Fe 0.1 S was also studied during the photocatalysis. The optimum values of operating parameters were found at an initial pH value of 5.0, a H 2 O 2 dosage of 0.15 mmol L −1 and a Zn 0.9 Fe 0.1 S dosage of 0.08 g when the initial concentration of BPA was 10 mg L −1 . Under the optimal conditions, the highest removal rate of BPA achieved 95%. After seven consecutive reaction cycles, the degradation efficiency of BPA could still reach 85% and there was only a little dissolution of Zn 2+ and Fe 2+ . Compared with the traditional photo-Fenton system, the UV + Zn 0.9 Fe 0.1 S + H 2 O 2 system can not only improve the degradation efficiency of BPA, but also reduce the dosage of H 2 O 2 and thus reduce the processing cost.
研究领域:
环境科学
·
材料化学
·
光催化
·
水处理
·
纳米材料
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2019
·Vol. 95
·期 3
·895-900
·
IF 2.338
Qiuyue Wang,Xuehan Wang,Yiwei Wu
A simple, cheap, sensitive and selective probe for determination of DNPH in wastewater using thioglycolic acid (TGA)-coated CdTe QDs (TGA-QDs) as fluorescence probe has been established, and the properties of CdTe QDs were characterized by TEM, FT-IR, DLS, XRD and zeta potentials. CdTe QDs fluorescence is highly efficiently quenched after adding DNPH on account of electron transfer effect, and the fluorescence quenching behavior of CdTe QDs interaction with DNPH is static quenching process. A good linear relationship is observed between the relative fluorescence intensity ( F 0 / F ) and 0.06–10 ng mL −1 of DNPH. As compared with some of reported methods, LOD of this method for analysis of DNPH (0.23 ng mL −1 ) is the lowest. Masking agents of DDTC and NH 4 OH can eliminate the interference of Cu 2+ , Ag + and Hg 2+ . Hence, DNPH can be selectively and accurately detected and the established method was successfully used for detecting DNPH in wastewater with acceptable recovery of 90.6–102%.
研究领域:
环境化学
·
分析化学
·
纳米材料
·
荧光传感
·
水质监测
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2023
·Vol. 100
·期 2
·355-367
·
IF 3.3
Chensheng Ma,Qingwu Xiong,Jingdong Lin,Allen Ka-Wa Wong,Mingliang Wang,Wai-Ming Kwok
Isocytosine, having important applications in antivirus and drug development, is among the building blocks of Hachimoji nucleic acids. In this report, we present an investigation of the excited state dynamics of isocytosine in both protic and aprotic solvents, which was conducted by a combination of methods including steady-state spectroscopy, femtosecond broadband time-resolved fluorescence, and transient absorption. These methods were coupled with density functional and time-dependent density functional theory calculations. The results of our study provide the first direct evidence for a highly efficient nonradiative mechanism achieved through internal conversion from the ππ* state of the isocytosine keto-N(3)H form occurring within subpicoseconds and picoseconds following photo-excitation. Our study also unveils a crucial role of solvent, particularly solute–solvent hydrogen bonding, in determining the tautomeric composition and regulating the pathways and dynamics of the deactivation processes. The deactivation processes of isocytosine in the solvents examined are found to be distinct from those of cytosine and the case known for isocytosine in the gas phase mainly due to different tautomeric forms involved. Overall, our findings demonstrate the high photo-stability of isocytosine in the solution and showcase the remarkable effect of covalent modification in altering the spectral character and excited state dynamics of nucleobases.
研究领域:
生物化学
·
理论化学
·
光化学
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2019
·Vol. 95
·期 5
·1219-1229
·
IF 2.338
Zhiquan Li,Chong Wang,Wanwan Qiu,Ren Liu
Designing digital light processing (DLP) 3D printable photosensitive resins with antibacterial properties is especially vital because of their potential applications in various biomedical fields. In this contribution, a thiol–ene–acrylate ternary system with reduced volume shrinkage and fast photopolymerization rate was chosen as the antibacterial 3D printing matrix resin. Two quaternary ammonium salt-type antibacterial agents (QAC and SH-QAC) with different molecular weight were designed and prepared, which can participate in the curing of matrix resin to achieve contact antibacterial effect. The effects of antibacterial agent content on the photopolymerization kinetics and on thermal and mechanical properties were discussed in detail. When the amount of added QAC is 4wt%, the antibacterial rate is almost 100% for Escherichia coli and Staphylococcus aureus , and when the amount of SH-QAC is 10wt%, the antibacterial rate against S. aureus is also essentially 100%. Both antibacterial photosensitive resins have been successfully applied in DLP technology to fabricate tooth model with high precision.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2025
·
IF 2.5
Yao Zhang,Shiming Zhang,Li Luo,Sansan Hu,Xujuan Huang,Yongzheng Chen
Using visible light to drive NADH regeneration is an economically viable and environmentally sustainable technique. However, it necessitates a metal hydride (MH, [CpRh(bpy)(H 2 O)] 2+ ) as a synergist, and the high cost of the Rh noble metal significantly impedes the development and application of in-situ NADH regeneration. Therefore, in this study, single-atom Rh was immobilized onto the CdS QDs@SiO 2 combination via a consecutive ball-milling technique in combination with ionic layer adsorption and substitution. Subsequently, an enhanced photo-metal synergistic catalysis system for the recyclable regeneration of NADH was developed. In this composite, the single-atom Rh serves two main functions: It acts as an electrical medium and a metal catalyst, which regulates the activity and selectivity of the regenerated NADH. This study has successfully addressed the key scientific issues regarding the low electron transport rate and the recycling of the Rh noble metal during catalysis. Results confirm that single-atom Rh is successfully immobilized onto the CdS QDs@SiO 2 combination (Rh-CdS@SiO 2 ) and exhibits a faster electron transport and enhanced selectivity. Under blue light (LED, 420 nm) irradiation, the Rh-CdS@SiO 2 photo-metal catalyst shows a 25-fold increase in recyclable operability and achieves a 68% regeneration yield of NADH in just 4 min. Moreover, (S)-(+)-4-phenyl-2-butanol can be obtained with the regenerated NADH as the coenzyme of P450 enzyme catalysis.
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DOI
高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2024
·
IF 2.6
Rong Zhang,Zhuannian Liu,Taoli Chen
Developing cost-effective and efficient photo-Fenton catalysts is crucial for advancing photo-Fenton technology. MoS 2 is a representative transition metal disulfide with attractive photoresponsiveness, making it ideal for preparing composite photo-Fenton catalysts. In this study, natural molybdenite was innovatively utilized as a source of MoS 2 (OM) to synthesize a low-cost and efficient Fe@MoS 2 (OMF) composite photo-Fenton catalyst by comminution and adsorption, which was then applied to the remediation of antibiotic-contaminated water. The OMF composites exhibited significant catalytic activity, with a kinetic rate constant of 0.022 min −1 , which was 3.1 times higher than that of the original OM (0.007 min −1 ), indicating a 3% increase. This was attributed to the synergistic effect of many photogenerated electrons and reversible Mo 4+ /Mo 6+ redox pairs, which accelerated the regeneration of Fe 2+ . After three cyclic tests, the concentrations of dissolved Fe 2+ and Mo 2+ ions remained below 0.38 mg/L and 0.17 mg/L, respectively. This indicates the high reusability of the catalyst in cyclic experiments. Ultimately, the main active species, •OH and •O 2 − , were generated during the photo-Fenton process, contributing significantly to TC degradation. This study may serve as a reference for the development and application of natural mineral composite photo-Fenton catalysts in the treatment of organic wastewater.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）