RSC Advances
·
2017
·Vol. 7
·期 35
·21758-21767
·
IF 3.108
Yali Bai,Zhenhuan Li,Bowen Cheng,Maliang Zhang,Kunmei Su
U–TiO2 is successfully coated with SiO2 and subsequently well modified by APTES, and the core–shell structure exists on TiO2@SiO2 and TiO2@SiO2/APTES, which greatly reduces aggregation of the TiO2 nanoparticles. The photocatalytic activities of U–TiO2, TiO2@SiO2, and TiO2@SiO2/APTES are evaluated using MB decomposition. Nearly 50% of the MB is degraded after 15 min in the presence of the U–TiO2 under UV radiation (300 W), and only 17.44% and 4.18% of the MB is degraded in the presence of the TiO2@SiO2-0.6 and TiO2@SiO2/APTES-1. However, TiO2@SiO2/APTES-0.6 and TiO2@SiO2-0.2 exhibit excellent UV absorbance capacities, and the TiO2@SiO2/APTES-0.6 achieves 80% of the UV-shielding ability of U–TiO2. Poly(p-phenylene sulfide) (PPS) is an easily photodegraded material and TiO2/PPS is more seriously photodegraded than PPS, however, the TiO2@SiO2/APTES nanoparticles can effectively protect the PPS from UV degradation, owing to their lower photocatalytic activities, higher UV-shielding abilities and easy dispersion in the PPS matrix. The breaking strength retention rate of the 1 wt% TiO2@SiO2/APTES/PPS film shows a maximum increase of 38.26%, and the breaking elongation retention rate increased by 41.64% at 2 wt% TiO2@SiO2/APTES loading. These results reveal that the incorporation of the TiO2@SiO2/APTES nanoparticles into the PPS matrix imparts excellent anti-UV properties to the PPS matrix, leading to a mechanical performance improvement.
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高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2019
·Vol. 94
·期 8
·2512-2521
·
IF 2.659
Qi Jiang,Runliang Zhu,Yanping Zhu,Qingze Chen
Background Developing effective removal processes for antibiotics has attracted increasing interest recently. In this work, a novel strategy involving the combination of photocatalysis with Fenton reaction using ferrihydrite/TiO 2 (Fh/TiO 2 ) nanohybrids was developed to efficiently degrade the antibiotic cefotaxime. Fh/TiO 2 nanohybrids were synthesized by simply growing Fh on the surface of commercially available TiO 2 . We expected that Fh of Fh/TiO 2 could capture photo-generated electrons from TiO 2 , inhibiting the recombination of electron–hole pairs; also, by virtue of Fe(III)/Fe(II) cycle on Fh/TiO 2 , photo-generated electrons could be continually transferred to H 2 O 2 to produce ·OH. Accordingly, high degradation efficiency of cefotaxime could be achieved. Results With UV light and H 2 O 2 , Fh/TiO 2 with a Fe/Ti molar radio of 7% showed high catalytic activity indeed, and its degradation rate for cefotaxime was nearly three times higher than that of TiO 2 . The decomposition of H 2 O 2 and production of ·OH in the UV+7%Fh/TiO 2 +H 2 O 2 system were also increased markedly. The large amount of Fe(II) on 7%Fh/TiO 2 determined in this system supported our hypothesis that Fh of 7%Fh/TiO 2 could capture photo-generated electrons from TiO 2 . Although dissolved iron was observed, the contribution of Fenton reaction by dissolved iron was rather limited. After four consecutive cycles, 7%Fh/TiO 2 still retained good stability. Conclusions The UV+7%Fh/TiO 2 +H 2 O 2 system provides a potential alternative in degradation of cefotaxime for further practical application, and it has the following advantages: high catalytic activity, simple preparation method, good stability and low cost, as well as continued catalytic activity after total consumption of H 2 O 2 . © 2019 Society of Chemical Industry
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Journal of Zhejiang University-SCIENCE B
·
2013
·Vol. 14
·期 7
·604-614
·
IF 1.108
Wang Shu-fang,Leng Jing,Xu Yi-min,Feng Mei-ling
Xiongdankaiming tablet (XDKMT), a well-known compound in traditional Chinese medicine, is widely used for the treatment of acute iridocyclitis and primary open-angle glaucoma. In this paper, accurate and reliable methods were developed for the identification of 20 constituents using high-performance liquid chromatography with photodiode array and electron spray ionization-mass spectrometry (HPLC-PDA/ESI-MS n ), and determination of nine of the constituents (chlorogenic acid, gentiopicroside, isochlorogenic acid B, diosmetin-7- O -β- d -glucopyranoside, apigenin, diosmetin, tauroursodeoxycholic acid, acacetin, and taurochenodeoxycholic acid) was developed using HPLC with ultraviolet absorption detector and evaporative light scattering detector (HPLC-UV/ELSD) for the first time. The best results were obtained on a Zorbax SB-C18 column with gradient elution using water (0.1% formic acid) (A) and methanol (0.1% formic acid) (B) at a flow rate of 0.7 ml/min. Tauroursodeoxycholic acid and taurochenodeoxycholic acid, owing to their low UV absorption, were detected by ELSD. The other seven compounds were analyzed by HPLC-UV with variable wavelengths. The calibration curves of all nine constituents showed good linear regression ( R
2 >0.9996) within the linearity ranges. The limits of detection and quantification were in the ranges of 0.0460–9.90 μg/ml and 0.115–24.8 μg/ml, respectively. The accuracy, in terms of recovery, varied from 95.3% to 104.9% with relative standard deviations (RSDs) less than 4.4%. Precision (with the intra- and inter-day variations less than 4.4%) was also suitable for its intended use. The developed method was successfully applied for the analysis of major components in XDKMT, which provides an appropriate method for the quality control of XDKMT.
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PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 9
·49913
·
IF 2.52
Mengwei Dai,Pan Song,Yong Zhang
A castor oil (CO) was modified via thiol-ene click chemistry reaction between CO and 3-mercaptopropyl trimethoxysilane, with the conversion of CC bonds of CO over 99% based on 1 HNMR spectra. The obtained modified castor oil (MCO) was used as a biobased polyol to prepare waterborne polyurethane (WPU) dispersions. The modification of CO exhibited a great effect on the properties of WPU dispersions and coatings, and an obvious change is the improvement of the water resistance of WPU coatings. WPU dispersions with MCO had good storage stability. A WPU coating with 7% MCO had high surface hydrophobicity, and its water absorption was as low as 3.2%. Conductive carbon black filled WPU coatings with MCO were cured by efficient UV radiation, and their conductive percolation threshold could decrease to 0.76%, which could be attributed to the well filler dispersion and strong filler-polymer interaction. The WPU dispersions are ecofriendly, and can be used to produce biobased WPU coatings with a great application potential in antistatic coating fields.
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高影响因子
Frontiers in Plant Science
·
2024
·
IF 4.1
Li Shuang,Yang Lei,Wang Min,Chen Yang,Yu Jianjun,Chen Hao,Yang Haijian,Wang Wu,Cai Zhiyong,Hong Lin
Introduction: Citrus fruit is rich in important functional constituents such as flavonoids, phenolic acids terpenes and other functional substances that play an important role for treating clinical diseases or controlling major agricultural diseases and pests. Plant secondary metabolites have become one of the most important resources of novel lead compounds, especially young citrus fruits contain multiple functional substances. ‘Orah’, a type of citrus reticulata, is known for its fine appearance, productivity, delicious sweetness, late-maturing characteristics, and is widely cultivated in China. Fruit thinning and rootstock selection are commonly used agronomic measures in its production to ensure its quality and tree vigor. However, few studies have demonstrated the effects of these agronomic measures on the functional substances of ‘Orah’.Methods: In this study, we used HPLC coupled with UV to detect the dynamic changes of fruit quality, 13 main flavonoids, 7 phenolic acids, 2 terpenes, synephrine and antioxidant capacity in both peel and pulp of citrus fruits grafted on four rootstocks (Red orange Citrus reticulata Blanco cv. red tangerine, Ziyang xiangcheng Citrus junos Sieb. ex Tanaka, Trifoliate orange Poncirus trifoliata L. Raf, and Carrizo citrange Citrus sinensis Osb.×P.trifoliate Raf) at six different developmental stages (from 90 DAF to 240 DAF).Results: The results indicated that rootstock can significantly affect the contents of functional constituents and antioxidant capacity in ‘Orah’. Additionally, it was found that pruning at either 90 DAF (days after flowering) or 150 DAF produced the most favorable outcomes for extracting functional substances. We also identified rootstock ‘Trifoliate orange’ has the highest total soluble solids (TSS) and ‘Ziyang xiangcheng’ to be the optimal in terms of comprehensive sensory of fruit quality, while ‘Red orange’ and ‘Ziyang xiangcheng’ are optimal in terms of functional substance quality, and ‘Red orange’ excels in antioxidant capacity.Discussion: Overall, the findings demonstrate the important role of rootstocks and developmental stage in shaping fruit sensory quality and functional substance synthesis, providing valuable insights for guiding rootstock selection, determining thinning time, and utilizing pruned fruits in a more informed manner.
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高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 3
·1957-1966
·
IF 4.9
Pan Ying,Wang Wei,Liang Qianyong,Du Jia,Zhang Dong,Zhao Hongting,Lü Ting,Zhang Yan
Nitrogen and phosphorus co-doped carbon dots (N, P co-doped CDs) were synthesized using a one-pot hydrothermal carbonization method. The resulting CDs were then applied to fabricate a multilayered coating on cotton fabric through a layer-by-layer self-assembly method, in combination with alginate and polyethyleneimine. When exposed to a 365 nm UV lamp, the coating containing N, P co-doped CDs emitted visible blue light. The cotton treated with these CDs was subsequently evaluated for UV-protection, thermal stability, and flame retardancy. Cotton-1 fabric (110 g/m 2 ) treated with a 6-bilayer CD-containing coating had a significantly higher ultraviolet protection factor (UPF) of 148.4 compared to the pure cotton fabric which had a UPF of 6.65. The cotton-1 fabric treated with CD coating exhibited more char residues at 700 °C under a nitrogen atmosphere in the TGA test. The study also discovered that the CD-containing multilayered coating significantly decreased the peak heat release rate and total heat release rate of cotton-1/(PEI/ACD) 6 by 52.8% and 53.8% respectively, in comparison to cotton-1 in the microscale combustion calorimeter test. These findings indicate that N, P co-doped CDs, which have both UV absorption and environmental friendliness, could be potential utilized as a flame retardant on the surface of cotton fibers. Graphical abstract
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ning Li,Xueyun Gao,Haikuan Fan,Yangqin Gao,Lei Ge
Effective and suitable utilization of solar energy was achieved using a full-spectrum-response photocatalyst AgBr/Cs x WO 3 , applied in the photocatalytic and photochromic field. Benefitting from near-infrared (NIR) absorption ability of Cs x WO 3 , AgBr/Cs x WO 3 exhibits enhanced visible-near-infrared (Vis-NIR) driven photocatalytic activity. Based on X-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), and the photoelectrochemical analysis, AgBr and Cs x WO 3 formed a Z-scheme system at the interface to efficiently separate and transfer photo-induced electrons at a fast rate. The quenching experiment and the electron spin resonance (ESR) tests indicated that the photocatalytic reaction is activated by the production of superoxide radicals. Furthermore, the photochromic analysis to different light exhibits the AgBr/Cs x WO 3 heterostructure is stable under visible light with negligible photodeposition of AgBr, and has excellent double photochromic activity with visible-shielding effect of AgBr to Ag 0 and infrared-blocking effect of Cs x WO 3 under ultraviolet light. This research provides new insights into the manufacture of energy-efficient and environmentally friendly materials that provide excellent performance in both thermal insulation and decontamination.
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高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 48
·18080-18089
·
IF 3.3
Wei Meng,Xiaoyan Fu,Wenzhi Sun,Haonan Li,Jing Jin,Guotao Sun,Shanshan Gao,Changsheng Wang,Hongwu Zhang
Here, we successfully synthesized the fast-X-ray-charged UV-visible mechanoluminescence (ML) phosphor CaMgGeO4:Tb3+. Fast X-ray charging (only 10 s of irradiation) can induce strong ML from CaMgGeO4:Tb3+, and the ML intensity reaches saturation after only 3 min of X-ray charging. The strong ultraviolet-blue ML emission (380 and 416 nm) of CaMgGeO4:Tb3+ can be used as an excitation source to effectively stimulate LED phosphors to produce ML emission of various colors. At the same time, there is a certain linear relationship between the ML intensity of the sample and the compressive load, indicating that the applied force can be accurately detected. According to the thermoluminescence results, the long-term and stable ML emission of CMG:Tb3+ is due to the continuous distribution of deep traps. The large number of deeply trapped electrons allows the long-term detection of stress bursts. After one-time X-ray charging for 3 min, even after a delay of 84 h, the signal-to-noise ratio can still reach 1.3 (2500 N) and 1.7 (3000 N) in multiple cycles of stress burst detection. The results have shown that CaMgGeO4:Tb3+ can not only be regarded as an efficient excitation source to realize various colors of ML emission, but it can also serve as a sensor to monitor potential force bursts over extended periods, which would expand the application of ML sensors.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Linshan Li,Junteng Zhao,Yifei Wang,Haiyang Wang,Xiwen He,Langxing Chen,Yukui Zhang
A benzoisoquinoline-linked covalent organic framework (BIQ-COF) was synthesized via a one-pot Doebner reaction. • BIQ-COF displayed exceptional hydrolytic stability, enhanced hydrophilicity, and an electron-deficient π-system. • BIQ-COF exhibited the higher adsorption capacities toward benzophenone (BP)-type UV filters. • The donor–acceptor π–π stacking between BPs and the quinoline surface was the dominant driving force for adsorption. • The BIQ-COF exhibited the excellent chemical, thermal stability and good practicality. As typical emerging contaminants, benzophenone-type UV filters have attracted the growing concern owing to their widespread and persistent existence in aquatic environments, as well as their well-characterized endocrine-disrupting effects that pose significant risks to human health. Herein, a benzoisoquinoline-linked covalent organic framework (BIQ-COF) was synthesized via a one-pot Doebner reaction, in which reversible imine intermediates were converted into irreversible quinoline rings functionalized with electron-withdrawing carboxyl groups. This structural modification endowed the resultant framework with excellent hydrolytic stability, improved hydrophilicity, and an electron-deficient π-surface simultaneously. The synthesized BIQ-COF exhibited fast adsorption kinetics toward benzophenone-3 (BP-3), achieving equilibrium within 8 min. It also possessed a wide pH adaptability ranging from pH 3–10, and removal efficiency exceeding 95% in tap water, lake water, and river water matrices. Compared with the imine-linked covalent organic framework (IM-COF), BIQ-COF exhibited a remarkably higher adsorption capacity for all five tested benzophenone (BP) analogs. Systematic mechanistic investigations integrating experimental verification, electrostatic potential mapping, and force-field energy decomposition demonstrated that donor–acceptor π–π stacking between electron-rich aromatic moieties of BP molecules and the electron-deficient quinoline surface of BIQ-COF was the dominant driving force for adsorption, quantitatively contributing 74–89% to the total interaction energy. Two distinct interaction modes were further identified: BP analytes bearing –OCH 3 groups were adsorbed predominantly via π–π stacking, whereas –OH-functionalized BP analytes underwent a synergistic adsorption driven by both π–π stacking and hydrogen bonding. These results demonstrated that for electron-rich aromatic micropollutants, engineering π-electronic complementarity between the adsorbent framework and target contaminants is a more effective design strategy than optimizing hydrogen-bonding functional groups for improved adsorption performance. Download: Download high-res image (123KB) Download: Download full-size image
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Jun-Feng Su,Qin-Yu Xing,Xiao-Nan Su,Zhi-Yong Tan,Xin-Yu Wang,Zhi-Chao Yang,Peng Yang
CeO₂ nanoparticles markedly enhance the thermal stability of polymer microcapsule shells. • The composite shell blocks ultraviolet radiation and scavenges reactive oxygen species. • Waste soybean oil released from ruptured microcapsules restores bitumen crack integrity. • Multi-cycle self-healing is achieved through sustained oil release and matrix preservation. • A coupled protection-healing mechanism yields synergistic damage reduction in bitumen. The self-propagating cycle of ultraviolet aging and mechanical cracking limits the service life of bituminous infrastructure. This work interrupts this cycle using microcapsules with a cerium oxide (CeO₂) polymer composite shell encapsulating waste soybean cooking oil. The CeO₂ nanoparticles elevate shell decomposition temperature from 184 °C to above 250 °C and reduce UV transmittance to less than 10% in the UV B and UV C regions. After 14 days of accelerated UV aging, the carbonyl index accumulation is reduced by 47%. Upon crack propagation, the shell ruptures and releases the oil, achieving 99% self-healing efficiency at 20 °C for the first fracture cycle and maintaining 79% efficiency after five consecutive cycles. A coupled damage evolution model reveals a synergy factor of 3.4 for the 5 wt% CeO₂ formulation, demonstrating that the integrated protection and repair mechanisms reduce accumulated damage more than three times as effectively as the sum of independent contributions. This closed loop architecture demonstrates a potential pathway to transform waste oil into a functional resource while embedding proactive UV defense and autonomous crack healing. Download: Download high-res image (284KB) Download: Download full-size image
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Yuzhe LI,Hui ZENG,Jin XU,Yan LI,Lishan ZHANG,Ying LIANG,Min ZHANG
A gas-phase absorption detector (GPAD) was developed using a surface-mount 235 nm light-emitting diode (LED) as the light source. Modules for housing the LED and photodiode were three-dimensional printed. A stainless-steel tube was used as the detection cell. To perform long path absorption detection, a fused silica full-ball lens (5 mm diameter) was employed to collimate the light produced by the UV-LED with a viewing angle of 120°. The light attenuation coefficient ( α b ) was measured to be 0.025±0.001 cm −1 . The optimum path length with the maximum signal-to-noise ratio was obtained at ca. 80 cm. This result agreed with the theoretical calculation for optimum path length, i.e., 2/ α b . The GPAD was coupled with an automated analysis system and applied to detect nitrite in water. The automated system added citric acid and ethanol into a water sample, and nitrite was converted to gaseous nitrous acid (HONO), which has a strong absorption at 235 nm. The produced HONO was purged with air, followed by water removal, and then detected with the GPAD. The method was used to detect nitrate and total dissolved nitrogen (TDN) in water as well. Nitrate was reduced to nitrite through a photo-induced reaction with a conversion efficiency of ca. 60%. TDN was converted to nitrate by using an alkaline persulfate digestion method, followed by photoreduction to nitrite, and detected by using the automated system. The limits of detection were 0.4 μM, 3.9 μM, and 6.7 μM (94 μg N/L) for nitrite, nitrate, and TDN, respectively.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Lin Liu,Shanshan Peng,Lei Fu,Yuxuan Guo,Xia Sun,Liang Song,Junpeng Shi,Yun Zhang
Since the strong blue light from the conventional blue chip has negative effects on human health, near-ultraviolet (n-UV) white light-emitting diodes (W-LEDs) have been widely studied. However, the photoluminescence spectrum generated by tricolor (blue, green, and red) phosphors contains a notable cavity in the deep-blue region (400–430 nm), which reduces the color quality. In this work, we report a novel series of narrow-band deep-blue-emitting phosphors with strong n-UV excitation, Ln2Si2O7:Bi3+ (Ln = Gd, Y, Lu, Sc), and realize the tuning of emission from 422 to 403 nm via cationic substitution, which bridges the deep-blue gap. All of these phosphors are effectively excited by n-UV radiation at approximately 370 nm and exhibit narrow-band deep-blue emission with a full width at half-maximum (FWHM) < 50 nm. Among them, Sc2Si2O7:Bi3+ generates 403 nm deep-blue emission with a 38 nm FWHM under 372 nm n-UV excitation, with high luminescence intensity and excellent thermal stability. Finally, 365 nm n-UV-pumped phosphor-converted (pc) W-LED devices are fabricated by combining Sc2Si2O7:Bi3+ and commercially available phosphors, and they have a high color-rendering index (Ra) of 95.4 and a low correlated color temperature (CCT) of 3736 K. This result suggests that these phosphors have potential applications in full-spectrum warm white lighting.
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危险品化学品经营许可证（带存储）