COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Xiuqing Liu,Jianhua Zhou,Jing Zheng
Light-induced self-healing materials are of great practical value due to their precise local modulation. Aromatic Schiff bases with imine bonds have self-healing property due to their fast dynamic bond exchange properties under visible light. In this paper, we prepared a fluorinated polyurethane-acrylate containing aromatic Schiff base with visible light-induced self-healing ability by Pickering emulsion polymerization. The effect of the aromatic Schiff base content on the particle size of the fluorinated polyurethane-acrylate emulsion, the hydrophobic and oleophobic, mechanical and self-healing properties of the latex films was systematically investigated. The maximum water contact angle and tensile strength of fluorinated polyurethane-acrylate latex film could reach 113.25° and 8.64 MPa, respectively. The tensile strength could be restored to 88.64 % of the original one under visible light irradiation after damage. This work is the first report on visible light-induced self-healing fluorinated polyurethane-acrylate containing aromatic Schiff base, and provides a new design idea for the development of sustainable waterborne polyurethane-acrylate.
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MOLECULES
·
2024
·Vol. 29
·期 16
·3970
·
IF 4.2
Xinfeng Cheng,Huixian Li,Xiaomeng Sun,Tianxu Xu,Zhenzhen Guo,Xianchao Du,Shuai Li,Xuyang Li,Xiaojing Xing,Dongfang Qiu
To synthesize an effective and versatile nano-platform serving as a promising carrier for controlled drug delivery, visible-light-induced diselenide-crosslinked polyurethane micelles were designed and prepared for ROS-triggered on-demand doxorubicin (DOX) release. A rationally designed amphiphilic block copolymer, poly(ethylene glycol)-b-poly(diselenolane diol-co-isophorone diisocyanate)-b-poly(ethylene glycol) (PEG-b-PUSe-b-PEG), which incorporates dangling diselenolane groups within the hydrophobic PU segments, was initially synthesized through the polycondensation reaction. In aqueous media, this type of amphiphilic block copolymer can self-assemble into micellar aggregates and encapsulate DOX within the micellar core, forming DOX-loaded micelles that are subsequently in situ core-crosslinked by diselenides via a visible-light-triggered metathesis reaction of Se-Se bonds. Compared with the non-crosslinked micelles (NCLMs), the as-prepared diselenide-crosslinked micelles (CLMs) exhibited a smaller particle size and improved colloidal stability. In vitro release studies have demonstrated suppressed drug release behavior for CLMs in physiological conditions, as compared to the NCLMs, whereas a burst release of DOX occurred upon exposure to an oxidation environment. Moreover, MTT assay results have revealed that the crosslinked polyurethane micelles displayed no significant cytotoxicity towards HeLa cells. Cellular uptake analyses have suggested the effective internalization of DOX-loaded crosslinked micelles and DOX release within cancer cells. These findings suggest that this kind of ROS-triggered reversibly crosslinked polyurethane micelles hold significant potential as a ROS-responsive drug delivery system.
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Laser & Photonics Reviews
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2024
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IF 9.8
Yin He,Zeyao Han,Junyu Li,Yu Gu,Yousheng Zou,Yao Wang,Jialin Yang,Wei Lei,Xiaobao Xu
Light detection and ranging (Lidar), which utilizes scattered near-infrared (NIR) light to identify objects, has shown great potential in remote sensing, autonomous driving, robotic vision, etc. However, the intensity of the scattered NIR light is significantly reduced, placing stringent demands on the selectivity and fast response of the sensing. Even though optical filters can be used to select weak signals, the photon losses arising from additional interfaces are inevitable, thus reducing the signal-to-noise ratio (SNR). In this work, a series of organic narrowband photodetectors are constructed with tunable and selective responses from 700 to 950 nm with a minimum full-width-at-half-maximum (FWHM) of ≈30 nm. To enhance response sensitivity and speed, delicate and compact photodiode architecture is applied through comprehensive device engineering. As a result, the detectors possess a sensitive response to weak NIR light with a detection limit of 3 nW, and response rise time ( τ r ) and decay time ( τ d ) of ≈24 ns and ≈1.3 µs, respectively. Moreover, a proof-of-concept Lidar based on these organic photodetectors is demonstrated with a distance resolution of ≈10 cm, which further confirms the great potential in practical application.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yaotao Cai,Zixi Zheng,Yanan Huang,Jintao Xu,Jianming Pan
Hemoperfusion is a common treatment for lead poisoning, where hemoperfusion adsorbents are used to remove lead ions from blood. However, traditional hemoperfusion adsorbents often suffer from limited efficiency and poor biocompatibility, reducing their effectiveness for human use. To address these limitations, we developed a novel photothermal nanomotor adsorbent through a controllable sequential super-assembly strategy. Gold nanoparticles (Au NPs) were incorporated into the nanochannels of halloysite nanotubes (HNTs), followed by modification of the outer HNT surface with polydopamine (PDA) and 2,3-dimercaptosuccinic acid (DMSA), forming Au@HNTs@PDA-DMSA. This nanomotor adsorbent leverages the photothermal properties of Au NPs to achieve self-propulsion via thermophoresis under near-infrared (NIR) light irradiation. The performance of this nanomotor was evaluated for Pb(II) removal in both aqueous solutions and human blood samples, reaching adsorption equilibrium within 20 min and a maximum capacity of 45.980 mg/g. The adsorption kinetics followed a pseudo-second-order model with a high fitting coefficient (R 2 = 0.999), and the Langmuir model fit better than the Freundlich model, indicating monolayer adsorption. Notably, when driven by 808 nm NIR light at 1.0 W cm −2 , the Au@HNTs@PDA-DMSA nanomotors showed a significantly enhanced adsorption capacity of 151.769 mg/g, improving blood lead removal efficiency by 1.80 times compared to non-irradiated conditions. Furthermore, the addition of sulfhydryl and carboxyl groups from DMSA provided more active sites, leading to a 9.76-fold increase in lead removal compared to passive adsorbents using HNTs. In vitro tests confirmed the excellent biocompatibility and biosafety of the nanomotor adsorbent, achieving a blood lead removal rate of 91.25 %. This advancement overcomes the limitations of traditional lead adsorbents, offering a promising solution for more effective lead detoxification in clinical and environmental settings.
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MOLECULES
·
2024
·Vol. 29
·期 7
·1670
·
IF 4.2
Jianfeng Wen,Xin Du,Feng Hua,Yiting Gu,Ming Li,Tao Tang
The aqueous instability of halide perovskite seriously hinders its direct application in water as a potential photocatalyst. Here, we prepared a new type of polyvinylpyrrolidone (PVP) passivated δ-CsPbI3(δ-CsPbI3@PVP) microcrystal by a facile method. This material can be uniformly dispersed in water and stably maintain its crystal structure for a long time, breaking through the bottleneck of halide perovskite photocatalysis in water. Under visible light, δ-CsPbI3@PVP can almost completely photodegrade organic dyes (including Rhodamine B, methylene blue, and crystal violet) in only 20 min. The efficient photocatalytic activity is attributed to the enhanced visible light absorption arising from PbI2defects in δ-CsPbI3@PVP and the intrinsic low photoluminescence quantum yield of δ-CsPbI3, which induces efficient light absorption and photocatalytic activity. We highlight δ-CsPbI3@PVP as an effective aqueous photocatalyst, and this study provides new insights into how to exploit the potential of halide perovskite in photocatalytic applications.
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Nano Energy
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2025
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IF 17.1
Peng Bai,Jiafa Chen,Yicheng Zhao,Yongdan Li
CO 2 formylation of amines provides a promising route to convert CO 2 into value-added chemicals. That process is usually performed through a thermo-catalytic approach with additional reducing agents, which increases the energy consumption and the complexity of the system. Herein, we report photocatalytic CO 2 formylation of benzylamine over Pt 1 In-ZnO x single-atom-alloy catalyst at room temperature in N , N -dimethylformamide (DMF) solvent. The anchoring of Pt single atoms onto In nanoparticles through Pt-In bonds accompanied with electron transfer from In to Pt improves the absorption capacity for visible light and the separation efficiency of photogenerated charge carriers. Furthermore, the adsorption and activation of CO 2 and benzylamine are promoted on the surface of Pt 1 In single-atom-alloy. After 6 h reaction under visible-light, the yield of N -benzylformamide reaches 48.6 mmol g −1 with a 95.3 % selectivity. A possible reaction mechanism is proposed based on a series of in situ characterizations and theoretical calculations. A decomposition-regeneration cycle of DMF is involved in the photocatalytic process, which extends the reaction region and thus facilitates the formylation of benzylamine. The photocatalytic system exhibits good cycling stability and universality. This work provides new insights for the rational design of single-atom-alloy catalyst and an efficient approach for the sustainable utilization of CO 2 .
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qianlong Fu,Yongzhao Yang,Juan Wang,Feng Hu,Shuang Li,Yang Zhao
The rapid development of additive manufacturing techniques enables the preparation of SiC ceramics with complex configurations; however, the high sintering temperature and defects-control are still great challenges during processing. Thus, SiC ceramics were prepared by digital light processing followed by liquid phase sintering using Al 2 O 3 –Y 2 O 3 additives in this study. The photopolymerization of the SiC slurry, microstructures and mechanical properties of the sintered ceramics were investigated. The Al 2 O 3 –Y 2 O 3 additives enhanced the curing ability of the photosensitive SiC slurries by reducing the absorbance and scattering of UV light. The liquid phase accelerated the densification of the ceramics by particles rearrangement and interfacial bonding. Thus, the flexural strength of the ceramics increased from 41.0 MPa to 62.8 MPa with sintering temperature increasing.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Guozhi Ma,Jihai Cai,Xiaoying Wang
High-value conversion of agroforestry residues into carbon dots (CDs)-based phosphors for white light emitting diodes (WLEDs) suffers from difficulty in adjusting fluorescence from the blue to red region. In this paper, xylan from sugar cane bagasse was utilized as a precursor to fabricate blue (B), green (G), yellow (Y), and red (R) fluorescent CDs with p-phenylenediamine by solvent modulation. The quantum yields of B-, G-, Y-, and R-CDs were 23.5%, 4.5%, 2.2%, and 15.4%, respectively. The formation and tuning mechanism of multicolor CDs were elucidated by structural characterization and density-functional theory (DFT) calculations. The results showed that the increased carbonization of CDs and graft of C═O on the CD surface by xylan passivation are two key reasons for the red-shift of fluorescence emission. WLEDs with color coordinates located at (0.30, 0.31) were successfully prepared by B-, G-, and R-CD/epoxy composites. In addition, the G-CD/epoxy composite demonstrated phosphorescence property and potential application in information security encryption. This study provides new avenues for the high-value utilization of agroforestry residues.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xianming Li,Ling Li,Heye Lv,Xiaoming Jiang,Peng Wu
Due to the unique features of 3,3′,5,5′-tetramethylbenzidine (TMB) in analytical chemistry, a series of TMB-based colorimetric nitrite assays (particularly nanozyme-involved) were developed to supplement the classical Griess assay. However, the exact reaction mechanisms and the final product between TMB and NO2– are controversial. Herein, we found that the widely adopted mechanism, namely the reaction between NO2– and the one-electron oxidation product of TMB (TMB+•), may be not valid. Alternatively, we found the reaction between NO2– and TMB primarily proceeded via diazotization (confirmed with ESI-MS) and yielded yellow diazo-TMB (not TMB2+, the two-electron oxidation product of TMB). In the presence of an easily ignored condition of visible light, diazo-TMB was promoted to its excited state, followed by two photoreactions to yield blue TMB+•, namely photoreduction ([diazo-TMB]* + TMB → TMB+•) and photosensitized oxidation ([diazo-TMB]* + O2 → 1O2, 1O2 + TMB → TMB+•). To facilitate the colorimetric process, a blue LED with a lighting wavelength matching with the maximum absorption of diazo-TMB, was employed to accelerate the generation of TMB+•. The light-driven colorimetric nitrite assay offered a limit of detection (LOD) of 0.1 μM, which was further explored to nitrite detection in urine samples and diagnosis of urinary tract infections caused by Escherichia coli.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Noor Zamin Khan,Sayed Ali Khan,Weilong Chen,Abdul Jalil,Jahangeer Ahmed,Muhammad Amin Padhiar,Chen Li,Marcin Runowski,Ren-Kui Zheng
The high-temperature solid state reaction approach was used to successfully synthesize novel tunable-color emitting Ca 2 LuTaO 6 phosphors with double perovskite structure that were un-doped, single-doped, and co-doped with Bi 3+ /Sm 3+ ions. The crystal structure, microstructure, steady-state photoluminescence, time-resolved luminescence measurements, and thermal quenching features of the material were studied. The density functional theory method was used to compute the band gap of the Ca 2 LuTaO 6 , and Ca 2 LuTaO 6 : Bi 3+ , Sm 3+ phosphors. The blue emission at 407 nm (with 313 nm excitation) is due to the host's luminescence, while the cyan emission at 480 nm (under 365 nm excitation) is related to the distinctive 3 P n − 1 S 0 transitions (n = 0, 1, 2) of Bi 3+ . Similarly, efficient red emission is observed in the case of Sm 3+ single-doped Ca 2 LuTaO 6 phosphors. In addition, the Ca 2 LuTaO 6 : 0.04Bi 3+ , 0.05 S m 3+ phosphors exhibit energy transfer phenomena and have excellent thermal stability, the fluorescence intensity at 150 °C maintains 73% of that at 25 °C and has a small chromaticity shift. The intense blue emission at 407 nm was effectively converted to cyan, red, and white light through doping with Bi 3+ and Sm 3+ , and the resulting energy transfer. The results obtained confirm that Ca 2 LuTaO 6 : Bi 3+ , Sm 3+ phosphors as a single matrix have great potential for high-power WLED applications.
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PLASMA CHEMISTRY AND PLASMA PROCESSING
·
2024
·
IF 2.6
Gang Yonggang,Long Yanhui,Wang Kaiyi,Zhang Yilin,Ren Xuping,Zhang Hao,Li Xiaodong
Recently, direct non-oxidative conversion of methane (NOCM) into hydrogen and light hydrocarbons has garnered considerable attention. In our work, we employed a dielectric barrier discharge (DBD) plasma over a GaN/SBA15 catalyst for NOCM. Adding catalyst to plasma remarkably promotes the conversion of CH 4 , resulting in a significant improvement, for instance, from 27.8 to 39.2%. A systematic investigation of plasma performance at different discharge powers with and without catalyst was conducted. In the case of plasma + 15wt% GaN/SBA15, CH 4 conversion reaches an impressive 79.4%. However, it exhibits the lowest selectivity of 14.4% for C 2 +, while achieving the highest selectivity for hydrogen at 48.9%. Several characterization methods, including XRD, SEM, BET, XPS, and TPO-MS, were used to study the mechanism of the reaction. Plasma electrons and ions can effectively interact with activated CH3 radicals, promoting their adsorption onto Ga sites on the catalyst surface. Simultaneously, hydrogen atoms adsorb onto neighboring N atoms, rapidly delocalizing to produce H 2 , and the delocalization of hydrogen atoms in C species leads to the formation of species like CxHy. This study highlights the potential of plasma catalysis in significantly improving CH 4 conversion at lower temperatures and atmospheric pressure.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Yong Li,Shiwei Yan,Xiaohua Jia,Jun Wu,Jin Yang,Chengxiao Zhao,Sizhe Wang,Haojie Song,Xiaofei Yang
Environmentally friendly polypyrrole (PPy) catalysts with conjugated nanostructures for superior photophysical and photoelectric applications are developed. The high coplanar structure via α-α connection is benefit for the transferring of photo-induced electron and improving the life of the light generated carrier. Importantly, the energy level structure of conjugated polymers was obtained via theoretical calculation and the photocatalytic mechanism of PPy photocatalyst was illuminated in detail. O 2 − are the main radical responsible for the degradation of MO. Moreover, conjugated PPy photocatalysts are stable with cycling. Compared to P25 and g-C 3 N 4 , PPy showed excellent photocatalytic performance for degradation of organic pollutants in full spectrum and visible light, the reaction rate constants of PPy are 4.27 and 5.31 times as much as the P25, respectively. Furthermore, PPy also exhibited effective photocatalytic performance towards different organic pollutants. These results obviously open interesting perspectives of using conjugated polymer and provide theoretical guidance for designing new organic photocatalysts to solve the energy and environment issues.
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