SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xinyang Xu,Jiawen Liu,Yixin Sun,Zhonghua Li
Among the various advanced photocatalytic materials, the organic conjugated microporous polymer (CMP) photocatalysts have garnered significant interest due to their exceptional efficiency in photogenerated electron transfer and their structural versatility. In this study, we developed two novel donor-acceptor 1 -acceptor 2 CMP systems through varying the electron donor unit. Pyrene (P) and triphenylamine (T) were acted as donor units (D), respectively, meanwhile dibenzothiophene-S,S-dioxide (BTDO, A 1 ) and 3,4-ethylenedioxythiophene (EDOT, A 2 ) as their acceptors to construct two D−A 1 −A 2 type CMP photocatalysts, P-BTDO-EDOT and T-BTDO-EDOT. Their photocatalytic performances were compared and studied through photocatalytic hydrogen production. The findings show that P-BTDO-EDOT possesses higher photocatalytic hydrogen production activity (87.21 mmol g −1 h −1 ) than T-BTDO-EDOT (66.25 mmol g −1 h −1 ) under visible light, attributing to its stable conjugated architecture, larger specific surface area, exceptional optoelectronic capability, wider light absorption, donor unit pyrene with strong electron-donating and efficient charge separation ability. This work not only highlights the potential for designing innovative CMP molecular structures with D−A 1 −A 2 system, but also opens up a new pathway for developing high-efficiency photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL LETTERS
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2018
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IF 1.206
Jiemei Wang,Runhui Yu,Furong Tao,Yuezhi Cui,Tianduo Li
A double-layered sensor was prepared by an electrospinning method using pyrene, polystyrene, and gelatine to prepare a pyrene-polystyrene/gelatin/glass device for the determination of nitroaromatics. The pyrene- polystyrene top layer, which was an electronspun membrane from a mixture of the starting materials in 3:1 N, N-dimethylformaide:tetrahydrofuan, served as the sensing layer for detecting 2,4-dinitrotoluene. The bottom layer was the gelatin electrospun membrane that served as an intermediate between the top layer and the glass slide. The dinitrotoluene analyte was transferred into the sensing layer above and below due to the porosity of the gelatin layer. With a large number of hydroxyl and amino groups, the gelatin layer formed hydrogen bonds with the 2,4-dinitrotoluene molecules, which caused the enrichment of the analyte around the gelatin layer. Additionally, single-layer pyrene-polystyrene/glass sensor was also prepared for control measurements. The quenching efficiency of the pyrene-polystyrene/gelatin/glass sensor was 76.7% at equilibrium obtained within 6 minutes, while the monolayer sensor pyrene–polystyrene/glass device provided 65.8% quenching efficiency within 6 minutes. The gelatin layer played an important role in the superior performance of the double-layered sensor.
研究领域:
分析化学
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材料科学
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
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2023
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IF 5
Weifan Pan,Qian Zhang,Anyi Qian,Zhui Yang,Yanbing Zhang,Caiqin Han,Peitong Duan
A kind of gold nanoparticles modified silver nanorods array (AuNPs/AgNRs) composite structure substrate with good Surfacing-enhanced Raman scattering (SERS) property was prepared by oblique angle deposition (OAD) method and chemical synthesis. According to the simulation results, the electric field enhancement effect of AuNPs/AgNRs composite substrate was the best when the inclination angle of silver rod was 72°, the length of silver rod was 1000 nm and the diameter of gold nanoparticles was 60 nm. CV and R6G were used as probe molecules to explore SERS activity of this substrate. The results exhibited that the detection limits of CV and R6G were both 10 −7 M, and the relative standard deviations (RSDs) were all less than 10.28 %. With simple preparation and high SERS activity, AuNPs/AgNRs substrate has good application prospect and research value when applied in the determination of polycyclic aromatic hydrocarbons represented by organic compound pyrene.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
·
IF 3.849
Feng Wang,Wenshuang Xu,Yishan Ouyang,Lulu Zhang,Hui Liu
Mesoporous silica nanoparticles (MSNs) were successfully endowed with on-off transport ability and stimuli-responsive property through surface modification. The MSNs with large specific surface areas were synthesized using optimized Stöber method, and then successively modified by amino- and 2-bromoisobutyrate-functionalization. Finally, MSNs grafted with reversible crosslinking terpolymer (MSNs-g-PDMV) were achieved through surface-initiated atom transfer radical polymerization. The resultant MSNs-g-PDMV and their intermediates were confirmed by TEM, SEM, XPS, FTIR, and so on. Pyrene was chosen to evaluate their drug loading and controlled release properties. Owning to crosslinkage and decrosslinkage of coumarin unit in PDMV under different ultraviolet (UV) irradiations, the polymeric chains substantially acted as on-off gate of MSNs to control the transport channel in mesoporous silica shell. The pyrene encapsulation percentage (31.6%) of MSNs-g-PDMV under the irradiation at 365 nm was only half of that under dark condition (60.3%). Cumulative release efficiency under the irradiation at 365 nm was obviously lower than that at 254 nm at the same temperature. In addition, thermal-responsive property of PDMV offered polymeric MSNs temperature sensitivity. Compared with pyrene-releasing experiment at 25 °C, a moderate drop in release efficiency occurred at 45 °C regardless of 254 nm or 365 nm UV irradiation.
研究领域:
材料科学
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药物递送
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纳米医学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 9
·2086-2092
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IF 4.696
Lianyi Xu,Faqin Tong,Xuemin Lu,Kai Lu,Qinghua Lu
A fluorescent and robust superhydrophobic coating based on a fluorinated polypyrene/silica hybrid (FPSH) film was reported. This hybrid film is composed of an underlying polypyrene film and overlying silica layers. The polypyrene film is electrodeposited on an indium tin oxide glass electrode by cyclic voltammetry to provide a petal-like hierarchical rough structure and strong fluorescence with one-step electrochemical polymerization. Notably, the fluorescence emission of this polypyrene film derives from the excimer forms, reported here for the first time. The silica layers are fabricated by a two-step chemical vapor deposition to obtain a supporting silica backbone and a low-energy surface. Several critical tests were performed on the FPSH films, confirming that the film is not only a thermally stable, anti-acid/alkali, and anti-impact self-cleaning surface, but also presents a strong green fluorescence emission.
研究领域:
材料科学
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表面工程
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荧光材料
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电化学
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纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）