COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Jianwen Peng,Peng Ye,Fei Xu,Xinyu Bu,Ruitao Wang,Dan Lin,Sicheng Yuan,Yanji Zhu,Huaiyuan Wang
Solar energy is an inexhaustible carbon-free source, and solar cells are invaluable enablers for achieving carbon neutrality ; however, the surface contamination on the glass of solar cells poses a formidable obstacle to maintaining a high power conversion efficiency . Existing self-cleaning coatings for combating surface contamination generally lack the highly comprehensive properties required for applications in real-world conditions. Herein, eco-friendly, highly transparent, waterborne omniphobic Si 2.5 WPA/AmZnO@SiO 2 coatings were developed by the ingenious design of polydimethylsiloxane-grafted waterborne polyacrylate (Si x WPA) and (3-aminopropyl)triethoxysilane-modified-SiO 2 encapsulated ZnO quantum dots (AmZnO@SiO 2 ). The enriched PDMS flexible chains on the coating surface overcame the energy barriers for moving liquids, and the AmZnO@SiO 2 inside absorbed and scattered UV rays, which synergistically endowed the coating with self-cleaning and UV-shielding properties. Importantly, after the self-cleaning procedure, the light transmission of dust-contaminated glass and short-circuit current density of corresponding solar cells could be restored to 99.78 % and 97.77 % of initial metrics, respectively. Furthermore, the commonly ignored self-cleaning mechanism was investigated and proposed: the coating weakened the adhesion of dust particles and utilized the drag force generated during liquid slip to achieve self-cleaning. The coating also showed good UV/humidity/thermal stability and mechanical strength , providing a design blueprint for outdoor optical device protection.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Huiying Chen,Nan Zhang,Chunlu Chang,Zhilin Liu,Yaru Shi,Xingyu Zhao,Shaojuan Li,Bin Duan,Hongwei Liang
Two-dimensional (2D) semiconductors have been of great interest in phototransistors in recent years due to their unique optoelectronic and electronic properties. However, their discernible spectral range and the efficiency of light absorption are usually restricted. Here, we present phototransistors based on mixed-dimensional heterostructures formed by zero-dimensional (0D) boron nitride quantum dots (BNQDs) and molybdenum diselenide (MoSe2), which have high responsivity (R), specific detectivity (D*), and external quantum efficiency (EQE), especially in the ultraviolet (UV) spectral range. The heterostructure phototransistors showed a 440% increase in R at 375 nm (from 5.6 to 24.7 A/W) and a 260% increase in D* (from 3.3 to 8.7 × 1011 Jones) compared to bare MoSe2 at the wavelength of 375 nm and a bias of 1 V. A series of characterization and comparison experiments show that charge transfer on BNQDs/MoSe2 results in the photogating effect and optical gain. Meanwhile, the high-performance BNQDs/MoSe2 heterostructure phototransistors exhibit broadband imaging capabilities and thus hold great promise for ultrasensitive light detection, neuromorphic visual sensing, and in-sensor computing applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 3
·671
·
IF 3.1
Yongneng Xiao,Shaoyi Hou,Zhenhuai Yang,Xingxing Huang,Yuanjun Guo,Siyu Ji,Xiaochan Huang,Fengshuang Wang,Qiang Hu,Xiaodong Guo
Tb3+-activated LTA zeolite-derived boro-aluminosilicate glass samples with a composition of xTb2O3-68(Na2O-Al2O3-SiO2)–32B2O3(x = 0.2, 1.0 and 10 extra wt%) were prepared using the melt-quenching method. The emission spectra recorded upon ultraviolet (UV) excitation with two different wavelengths of 193 and 378 nm showed blue light (5D3to7FJ=6,5,4and5D4to7F6transitions of Tb3+) and green light (5D4to7F5transition of Tb3+) emissions with comparable intensities up to a Tb3+concentration of 10 extra wt%. Of note, the mean decay times of the green luminescence of the glass samples were relatively fast (<20 μs). The synthesized glass has potential in applications concerning UV imaging, UV detection, and plasma display panels.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2024
·
IF 5.9
Li-Zhi Huang,Jingjing Lin,Weiguo Chen,Wei Wang,Yitao Dai,Ivan P. Pozdnyakov,Bingbing Hu
The persistence of chlorinated alkanes in aquatic environments poses significant health risks due to its biotoxicity and high volatility, which contributes to both water and air pollution. This study investigates the efficacy of carbon dioxide radical anion (CO 2 • − ) mediated advanced reduction processes (ARPs) for the reductive dechlorination of chlorinated alkanes using small molecular monocarboxylic acids (SMAs) under UV irradiation. The study focused on formic acid (HCOOH), acetic acid (CH 3 COOH), and propionic acid (CH 3 CH 2 COOH) to generate CO 2 • − , revealing that UV/HCOOH system exhibits a notably high chloroform (CF) degradation efficiency of 97.8% in 90 minutes. Kinetic studies indicated a linear relationship between the HCOOH concentrations and the observed reaction rate constants ( k obs ), demonstrating that CO 2 • − production is crucial for CF degradation. Electron paramagnetic resonance spectroscopy identified CO 2 • − and hydroxyl radicals (HO•) as the active species, with the former playing a predominant role in CF degradation. The study also explored the influence of carbon chain length in SMAs on CF degradation, finding that longer chains decrease the degradation efficiency, potentially due to reduced UV activation. A higher reaction rate constant ( k obs ) under acidic conditions, with a marked decrease in efficiency as the pH exceeds 3.7, where HCOO − becomes predominant. This study enhances our understanding of CO 2 • − mediated ARPs and explores potential applications in environmental remediation, providing insights into the pathways and mechanisms of CF degradation. The UV/SMAs systems offer advantages for practical applications, such as milder reaction conditions and higher efficiency compared to traditional methods.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2024
·
IF 2.2
Lin Wang,Yang He,Yanhong Zhu,Jianqiang Zhang,Shijie Zheng,Wen Huang
The inevitable UV aging of microplastics (MPs) is one of the key factors affecting their interaction with antibiotics. In this study, polyethylene (PE) and polystyrene (PS) MPs were aged with UV irradiation. The adsorption isotherms and kinetics of ciprofloxacin (CIP) to virgin and aged MPs were investigated through various models, and the effects of pH on the adsorption amount were explored. Characterization revealed that the surfaces of aged MPs became rougher, and the hydrophilicity increased. These aged MPs were still in the early stage of aging on the basis of their carbonyl index (CI) (<0.2) and O/C (<0.04) values. The adsorption isotherms indicated that the adsorption mechanism of aged PE was different from that of virgin PE. Compared with virgin PE, the adsorption amount of aged PE increased by 87.80–95.45%, and the adsorption rate decreased by 65.52–80.74%. However, aging did not significantly affect the equilibrium adsorption amount or adsorption rate of aged PS. The external diffusion rate (Kext) (about 2.29–0.36 h−1) was almost 30 times greater than the internal diffusion rate (Kint) in the film-pore mass transfer (FPMT) model, indicating that CIP adsorption rate was dominated by external diffusion. A hydrated functional zone is thought to form around aged MPs, thus changing the adsorption mechanism and adsorption amount of aged PE. Therefore, more attention should be given to alterations in the hydrated functional zone in the early stage of MPs aging.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Wei Tan,Lixiao Gao,Jingna Su,Chunlong Zuo,Lina Jiang,Jieyun Zhao,Xiaoyu Liu,Yuanlin Ren,Xiaohui Liu
Inspired by mussel adhesion proteins, the in-situ self-polymerization of dopamine (DA) was performed to generate a secondary reaction platform on the surface of lyocell fabrics, then a novel flame retardant and UV-resistant functionalized coating was constructed by introducing hexachlorocyclotriphosphazene (HCCP) and polyethyleneimine (PEI). Thermogravimetric (TG) and combustion test results showed that the introduced P/N elements had significant positive effects on char formation ability and flame retardancy. In particular, the peak heat release rate (PHRR) and total heat release (THR) of the treated sample decreased by 89.55% and 89.51%, while the limiting oxygen index (LOI) value of the treated samples maintained above 33.2% after 20 laundering cycles (LCs). In addition, the ultraviolet protection factor (UPF) values of the treated samples were significantly increased from 9.31 of the control sample to 666.04, and the tensile strength and elongation at break were correspondingly increased by 6.51% and 9.57%. This work provided a general and advanced strategy for the preparation of high-performance textiles with integrated flame retardancy, UV-resistance and mechanical enhancement.
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2017
·
IF 4.208
Xiaoxue Pan,Liqing Yan,Ruijuan Qu,Zunyao Wang
The goals of this study were to bring forward new data and insights into the effect of activation methods, operational variables and reaction pathways during sulfate radicals-based oxidation of benzophenone-3 (BP-3) in aqueous solution. Heat, transition metal ions (Fe 2+ , Cu 2+ , Co 2+ ), UV and visible light irradiation were used to activate persulfate (PS) to degrade BP-3. The results showed that these three activation methods can remarkably enhance BP-3 removal efficiency. Under the conditions of [BP-3] 0 : [PS] 0 = 1: 500, pH = 7.0, and 40 °C, complete removal of BP-3 (1.31 μM) was observed in 3 h. In the pH range of 3.0–9.0, the degradation of BP-3 decreased with increasing pH. Increasing the PS dosage accelerated the reaction, while the presence of humic acid (HA) significantly inhibited the efficiency of BP-3 removal. Based on electron paramagnetic resonance (EPR) and radical quenching studies, sulfate and hydroxyl radicals contributed to the oxidation process. According to the evolution of BP-3 and its 7 by-products, as well as frontier electron densities (FED) calculation, two routes were proposed involving hydroxylation, demethylation and direct oxidation. On the whole, this work is a unique contribution to the systematic elucidation of BP-3 removal by PS.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Bowen Dong,Yan Yuan,Jing Luo,Liming Dong,Ren Liu,Xiaoya Liu
Recently, acrylate epoxidized soybean oil (AESO) has become one of the most important industrial, bio-based, UV-curable resins. To reinforce AESO-based UV-curable coatings, acryloyl-group functionalized graphene ( acr -RGO) was successfully prepared and characterized using attenuated total reflection-Fourier transformed infrared spectroscopy, X-ray diffraction, Raman spectroscopy, and thermogravimetric analysis. The AESO/ acr -RGO nanocomposite coatings were fabricated using UV-curing technology to covalently introduce graphene sheets into the AESO matrix. Real-time infrared and ATR-FTIR spectroscopy were used to monitor double-bond conversions and deep curing in the AESO/ acr -RGO coating. Scanning electron microscope images revealed the homogeneous dispersion of acr -RGO in AESO. The thermal and mechanical properties of cured films were evaluated through thermogravimetric analysis, tensile testing, and dynamic mechanical analysis. The results revealed that the introduction of acr -RGO effectively enhanced the mechanical properties and the thermal stability of the host resin AESO. The optimal reinforcing effect was observed at 1.0 wt% acr -RGO loading, under which the tensile strength and storage modulus of the AESO/ acr -RGO nanocomposite improved by 167% and 15%, respectively, compared with those of neat AESO. The initial degradation temperature of the AESO/ acr -RGO nanocomposite was also sharply improved by 61 °C under a loading of 0.5 wt%. Additionally, a slight increase in the glass transition temperature of the AESO/ acr -RGO nanocomposite from 29.6 to 36.1 °C was observed when acr -RGO was incorporated. Furthermore, introducing acr -RGO enhanced the coating properties. By contrast, the composite coating using amino-group functionalized graphene (AESO/ ami -RGO) nanocomposites exhibited poorer mechanical properties and lower thermal stability than its acr -RGO counterpart. The remarkable property reinforcements are thus attributed to the acryloyl-group functionalization of graphene, which improved the compatibility and enhanced the interfacial adhesion of graphene with the AESO matrix.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Meng Liu,Xiangyu Xu,Wanying Xiao,Yipeng Liu,Yongbo Cui,Haojie Zhang,Amin Ju,Bo Feng,Lijing Wang,Weilong Shi
Designing photocatalysts with a broad reaction to sunlight is crucial for efficient clean energy conversion. However, most catalysts reported so far can only respond to UV and visible light for photocatalysis, neglecting the utilization of near-infrared light, which accounts for almost 50 % of sunlight. In this study, we obtained Au nanoparticles (NPs) decorated porous hollow SrTiO 3 material rich in oxygen defects using an acid etching-assisted hydrothermal method. The formation of a Schottky heterojunction between Au and SrTiO 3−x with matched Fermi levels enhances the electron transfer ability of SrTiO 3−x . Additionally, Au NPs exhibit two types of surface plasma resonance (SPR) effects at 480 nm (transverse SPR) and 800 nm (longitudinal SPR in the near-infrared region) by absorbing specific photons emitted by SrTiO 3−x . The "hot" electrons of the photoexcited SPR state can be further injected into the CB of SrTiO 3−x . Furthermore, the local electromagnetic field around the SPR-enhanced Au NPs effectively promotes the excitation and transfer kinetics of photoelectrons, allowing more "hot" electrons to participate in the photocatalytic reaction. Besides, the unique hollow porous structure of the catalyst ensures multiple reflections of sunlight within SrTiO 3−x . As a result, the hydrogen production efficiency of Au-SrTiO 3−x under near-infrared (NIR) and UV–vis-NIR light irradiation reaches 850 and 3206 μmol h −1 g −1 , with apparent quantum efficiency of 6.4 % and 7.2 % at 820 nm and 420 nm, respectively. The possible photocatalytic mechanism was proposed based on thorough systematic experimental analysis and theoretical calculations.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF STEROID BIOCHEMISTRY AND MOLECULAR BIOLOGY
·
2025
·
IF 2.5
Zhuoqi Chen,Chaochao Gong,Shaowei Wang,Han Lu,Yang Zhu,Ren-shan Ge,Yunbing Tang,Yingfen Ying
Benzophenone (BP) UV-filters have been extensively used for the prevention of UV-induced adverse effects in personal care products. Their potential to interfere with steroidogenesis in the female reproductive system remains uncertain. 17β-Hydroxysteroid dehydrogenase 1 (17β-HSD1) facilitates the conversion of estrone to estradiol, playing a key role in estrogen activation. This study delves into the effects of eleven BPs on human and rat 17β-HSD1, while also analysing the 3D-quntitative structure-activity relationship (3D-QSAR) and the underlying mechanisms. The inhibitory potency of inhibiting human placental 17β-HSD1 was found to be in the order of BP-2 (IC 50 , 11.42 μM) > BP-1 (14.17 μM) > BP-4 (49.05 μM) > BP-6 (63.49 μM) = BP-8 (63.46 μM) > others. BP-1 and BP-2 markedly inhibited estradiol secretion by human placental BeWo cells at ≥ 1 μM. In contrast, the inhibitory strength of suppressing rat ovarian 17β-HSD1 activity was found to be in the order of BP-2 (IC 50 , 13.33 μM) > BP-1 (15.09 μM) > BP-4 (22.68 μM) > BP-12 (31.12 μM) > BP (119.99 μM) > others. Mode action analysis revealed that these BP compounds acted as mixed inhibitors of both human and rat 17β-HSD1. The introduction of a 4-hydroxyl substitution in the benzene ring was found to markedly increase the inhibitory potency against human and rat 17β-HSD1. BP-1 and BP-2 demonstrated the ability to penetrate human BeWo cells and inhibit estradiol secretion at ≥ 1 μM. Docking analysis revealed that the 2-hydroxyl group of BP-1 and BP-2 forms a hydrogen bond with catalytic residue Ser142 of human 17β-HSD1. 3D-QSAR pharmacophore analysis showed that there are hydrophobic regions and hydrogen bond donor can interact with BPs. In conclusion, this study establishes that BP-2 is the most potent inhibitors of human 17β-HSD1 among the BPs under investigation, highlighting a significant difference in the structure-activity relationship.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Yanlu Sun,Xilin Pei,Zhengqi Wang,Dequn Wu,Xueli Wang,Jianyong Yu,Ruchao Yuan,Faxue Li
In the pursuit of enhancing the fire safety of polyamide 6 (PA6), the addition of flame retardants generally leads to hydrogen bond dissociation, which results in detrimental effects on the mechanical properties of PA6 composites and impedes processing and application in the textile field. In this study, a macromolecular flame retardant, PPB, designed with hydrogen bond donor-acceptor spacing aligned with PA6, was synthesized to increase the number of hydrogen bonds. The addition of 10 wt% PPB to the PA6 matrix (PA6/PPB10) endowed the composite with the limiting oxygen index (LOI) increased to 31.6 % and V-0 rating in the vertical burning (UL-94) test. PA6/PPB10 also exhibited significant enhancement in tensile strength by 12.6 % compared to pure PA6 and demonstrated a superior ultraviolet protection factor (UPF) value of 573, greatly exceeding the value of 3 for PA6. The quenching effect, diluting effect in the gas phase, and hydrogen bond interactions between PPB and PA6 backbones imparted PA6/PPB composites with satisfactory flame retardancy and mechanical properties. As a representative example, PA6/PPB10 was melt-spun into filaments with a pleasing tenacity of 3.6 cN/dtex and self-extinguishing capability within 5 s after ignition, confirming the sustained comprehensive properties after spinning and drawing into filaments.
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Runying Gao,Xindan Yi,Xinyu Liu,Haojie Wang,Lingzhi Wang,Birong Zeng,Guorong Chen,Yiting Xu,Conghui Yuan,Lizong Dai
In order to endow polyvinyl alcohol (PVA) film with the functionalities of highly-effective flame retardancy and optical properties, the strategy of doping phosphorus into carbon quantum dots (CQDs) and then using the P-containing CQDs as flame retardant is worthy investigating. In this work, m -phenylenediamine (MPD), 2-carboxyl ethyl(phenyl)phosphinic acid (HPP) and phytanic acid (PA) were used as carbon source and phosphorus sources to synthesize three kinds of CQDs, which were named as MPD-CQDs, MPD-HPP-CQDs and MPD-PA-CQDs respectively. Subsequently, the CQDs-PVA composite films were prepared by blending CQDs with PVA solution through casting process, the flame retardancy and UV shielding properties of the PVA-CQDs composite films were tested by kinds of techniques such as vertical burning tests (UL-94), limited oxygen index (LOI), UV–visible spectroscopy and so on. In addition, the residual char structure of the composite films was investigated by SEM and EDS. The results showed that compared with phosphorus-free MPD-CQDs, the two P-containing CQDs, both MPD-HPP-CQDs and MPD-PA CQDs, produced better flame-retardant effect on the PVA film. As the percentage of phosphorus increased, the flame retardancy of CQDs-PVA composite film greatly enhanced. When 15% MPD-HPP-CQDs and 15% MPD-PA-CQDs were added to PVA, the LOI value of MPD-HPP-CQDs-PVA and MPD-PA-CQDs-PVA was 27.8% and 31.5% respectively, meanwhile, the UL-94 rating reached VTM-1 and VTM-0, respectively. Due to the intact layer of P-containing condensed phase, the gas diffusion and oxygen transportation were hindered, which slowed down the combustion and promoted the further carbonation. In addition, both MPD-HPP-CQDs-PVA and MPD-PA-CQDs-PVA composite films exhibited good UV shielding properties without affecting the transparency of PVA itself.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）