ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 30
·期 5
·1907650
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IF 15.621
Yong Zhang,Xiaoyue Zhao,Jiaxin Chen,Siyuan Li,Wei Yang,Xiaosheng Fang
ZnO film ultraviolet photodetectors (UV PDs) have always suffered from slow speed and low photosensitivity that restrict their broader applications. To break through those barriers, high-performance ZnO UV PD based on self-polarized BaTiO 3 (BTO) is first introduced through a facile one-step spin-coating method. Compared with pure ZnO film UV PD with low on/off ratio (65) and slow speed (4.1/7.5 s) at 3 V bias under 350 nm UV light, the BTO-ZnO bilayer film device exhibits an ultrahigh on/off ratio (14 300) and ultrafast response speed (0.11/5.80 ms), which is much faster than that of the most reported ZnO film-based UV PDs. The numerical simulation demonstrates that the spatial distribution of electron concentration of ZnO film is regulated by the self-polarization of BTO film, resulting in low dark current and fast response time of the BTO-ZnO PD. This work provides a new approach to fabricate high-performance PDs based on self-polarized ferroelectric materials.
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CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Cong Geng,Zhijie Liang,Fuyi Cui,Zhiwei Zhao,Chen Yuan,Jinying Du,Chuang Wang
Due to the inefficient treatment by the biotic and UV-disinfection processes in wastewater treatment plants, the broad-spectrum Fluoroquinolone antibiotics (FQs) are frequently detected in water environment around the world. In this work, the photo-degradation of three FQs (norfloxacin-NOR, ciprofloxacin-CIP, levofloxacin-LEV) by VUV/UV irradiation was investigated. The results showed that the degradation of FQs in VUV/UV irradiation system were more effective than that in UV irradiation system by enhanced the defluorination and decarboxylation . FQs could be degraded more efficiently with high temperature and low initial concentration, and the effect of flow rate was small. Initial pH played a key role in degradation of NOR and CIP. Most anions could slightly affect the FQs removal in water, except the carbonate and phosphate species. 1 O 2 and ·OH played the primary role in FQs degradation in VUV/UV system. Defluorination, decarboxylation, and piperazine ring oxidation were the main degradation pathways for three FQs degradation, but demethylation was a particular degradation pathway of LEV. Antibacterial activities of FQs aqueous sample were reduced in both VUV/UV and UV system, while the removal of antibacterial activities in the VUV/UV process were more efficient than UV process for NOR and LEV. VUV/UV system was more energy-saving for removing FQs. These results suggested that VUV/UV system is potential alternative in replacing or enhancing UV system in wastewater treatment plants for FQs removal in the future.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Youzhi Yang,Shuang Li,Di Liu,Siyuan Guo,Zhijun Liang,Kaikai Ba,Yanhong Lin,Tengfeng Xie
So far, for photoelectric metal oxide semiconductor gas sensors, it is a huge bottleneck to achieve high response performance and low detection limit of formaldehyde at room temperature. This work introduced the synthesis of cauliflower-like graphene-modified In-doped ZnO (GR/In-ZnO) composites via a facile one-pot method with a large comparative surface area for low-concentration formaldehyde sensing at room temperature. GR/In-ZnO-300 showed the highest response to 10 ppm formaldehyde, up to 1891%, which was 12 times that of In-ZnO-300. In addition, the theoretical detection limit of GR/In-ZnO-300 was as low as 13 ppb, and the response at this concentration was 137%. Through the characterization of Surface Photovoltage (SPV), Transient Photovoltage (TPV), Surface Photocurrent (SPC), X-ray Photoelectron Spectroscopy (XPS), and nitrogen gas adsorption isotherms , good formaldehyde sensing performance of GR/In-ZnO-300 was attributed to the excellent separation and transmission capacity of photogenerated carriers, the high specific surface area (109.2 m 2 /g), and abundant oxygen defects on the surface. This work provides a feasible strategy for the design of low-concentration formaldehyde sensing materials with a rapid response at room temperature.
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Polymers
·
2026
·Vol. 18
·期 18
·2246
·
IF 5.8
Xinyun Mai,Surapon Saensouk,Piyaporn Saensouk,Xingyu Wang,Qinjiabao Hu,Lingling He,Bin Huang,Caihua Liu
Cuminaldehyde (CA), a major bioactive constituent of cumin essential oil, was incorporated into gelatin/konjac glucomannan (Gel/KGM) composite films at different levels, expressed relative to the polymer content (mL/g polymer), to investigate its effects on film structure, physicochemical properties, and antioxidant activity. Structural characteristics of the films were examined using Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Mechanical properties, surface wettability, optical properties, water sensitivity, and antioxidant activity were also determined. Spectroscopic analyses indicated changes in the molecular interactions of the Gel/KGM matrix following CA incorporation, while XRD and SEM analyses showed reduced structural order and a more heterogeneous microstructure at higher CA levels. Representative contact-angle observations showed an initial angle of 40.2° for the Control and 58.0° for CA-10, suggesting a tendency toward reduced surface wettability after CA incorporation. The addition of CA also improved UV-shielding properties and enhanced antioxidant responses, although the magnitude and trend of the antioxidant effect depended on the assay. In contrast, higher CA levels significantly reduced tensile strength and increased water solubility, whereas the tensile strength of films containing 1 mL CA did not differ significantly from that of the control (p> 0.05). These results demonstrate that the structural, physicochemical, and functional responses of Gel/KGM composite films varied with the nominal CA loading. Among the tested formulations, CA-3 represented a possible compromise between structural integrity and functional performance. Further studies using real food matrices are required to validate its practical applicability under actual food-packaging conditions.
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Advanced Optical Materials
·
2023
·
IF 9
Sikai Wang,Chunshuai Hua,Lu Wang,Ci Wang,Lu Liu,Jing Ren,Jianzhong Zhang
Glassy phosphors offer a promising opportunity to overcome the limits of polycrystalline counterparts, thanks to their merits including excellent optical transparency, abandonment of organic binders, and capability of drawing fibers, etc. However, research and development of glassy UV-C phosphors and fast scintillators have seriously lagged behind crystals. Here, a new type of efficient UV-C phosphors and fast scintillators (double gain) is developed from Pr 3+ -doped transparent nano-glass composites (nano-GCs) containing KY 3 F 10 nanocrystals. Such a material combines favorably the advantages of both crystal and glass, exhibiting intense interconfigurational 5 d -4 f emissions of Pr 3+ upon deep-UV, high energy electron-beam and X-ray excitations. The emission profile ideally overlaps with the germicidal effectiveness curve. The Pr 3+ -doped nano-GCs are endowed with a radiative decay time shorter than that of extensively studied Ce 3+ -doped glasses and nano-GCs. They exhibit intense X-ray excited radioluminescence that is comparable to the standard Bi 4 Ge 3 O 12 (BGO) crystal and significantly stronger than Pr 3+ -doped ZBLAN fluoride glass known for the high luminescence efficiency. An X-ray imaging system with a good spatial resolution using the Pr 3+ -doped nano-GCs is also demonstrated.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Abdul Haleem,Fan Wu,Wenqing Wang,Mohib Ullah,Hao Li,Afzal Shah,Jianming Pan
Recovering palladium rapidly and effectively from electronic waste materials presents a challenging and essential task, mainly due to the harsh acidic conditions. This study developed a highly porous and lightweight monolith to address this issue by enabling rapid and efficient palladium adsorption under acidic conditions. The monoliths were fabricated through a quick UV -irradiation cryopolymerization process. The resulting monoliths exhibited significantly enhanced palladium adsorption capacity, measuring at 155.5 mg g −1 , surpassing most previously reported data. The adsorbed concentrations of Pd(II) and other coexisting ions were determined using an Inductively Coupled Plasma Optical Emission Spectrometer ( ICP-OES, VISTA-MPX, Varian ). Various parameters such as pH , contact time, temperature, concentration, and selectivity were investigated to assess their impact on palladium adsorption. The material demonstrated superior selectivity for palladium ions in the presence of coexisting metal ions. Furthermore, the material's thermal stability was evaluated within the 25 – 100 °C range, revealing sufficient adsorption capacity at temperatures up to 100 °C , indicating its potential for implementation in harsh conditions. The synthesized monolith exhibited a shelf life of up to six months without degrading its adsorption performance. Moreover, the material retained its adsorption efficiency after multiple cycles of use. The effectiveness of palladium adsorption was also demonstrated in actual wastewater samples, further validating the material's practical application. Overall, this designed system showcases excellent adsorption performance and stability, making a valuable contribution to polymer chemistry and environmental science for recovering precious metals from wastewater.
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Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Xiaojuan Li,Jun Wu,Fangtao Ruan,Zhenzhen Ge,Toshiaki Natsuki,Hua Wang,Maoli Yin
Silk, a popular luxury textile with many years of history, is easy to embrittle and adsorb bacteria when stored for a long time or exposed to sunlight, which affects its service life. To improve the silk fabrics with excellent antibacterial activity, washing and aging durability, and UV shielding, multifunctional silk fabrics were designed and fabricated via a green finishing approach. Here, we proposed a simple strategy to fabricate silk fabrics with multi-functions via coating clavate-shaped ZnO nanoparticles (ZF-silk fabrics) by dipping and pressing for cycles. The scanning electron microscope (SEM), fourier transform infrared (FTIR), ultraviolet visible spectrophotometry (UV–Vis), and X-ray diffraction (XRD) were used to analyze the structure and properties of fabricated ZF-silk fabrics. Compared with raw silk fabric, the fabricated ZF-silk fabrics represented excellent UV shielding, good tensile strength, and superior antibacterial activity. Notably, the ZF-silk fabrics had good washing stability and aging resistance. In addition, the ZF-silk fabrics possessed superior antibacterial activity before and after aging treatment (under UV radiation for 72 h). Therefore, the durable and multifunctional ZF-silk fabrics indicate great potential for achieving to realize a long service life of the fabrics.
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PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Zhijun Liu,Guoming Yuan,Wenjie Diao,Yaodong Zhang,Enxiang Jiao,Jun Shi,Kun Wu
It is a challenge to develop polyurethane pressure-sensitive adhesive (PU-PSA) simultaneously with good cohesion and adhesion properties. Inspired by the structure of multiple hydrogen bonds in spider silk, we introduced Acylsemicarbazide (ASCZ) moiety that can form multiple hydrogen bonds in the polymer network into PU-PSA. The characteristic absorption peaks of ester groups at 1600–1780 cm −1 were analyzed in FTIR testing, and the results showed that ASCZ formed multiple hydrogen bonds in PU-PSA, and the hydrogen bond content increased with the increase of ASCZ content. In particular, PUA-AD20% with 24.3 % hydrogen bond content showed higher shear strength (0.51 MPa) and debonding energy (3.3 KJ m −2 ). Rheological tests showed that PU-PSA storage modulus and loss modulus increased with increasing frequency, which was highly frequency dependent. Therefore, as dynamic and reversible sacrificial bonds, hydrogen bonds can dissipate energy efficiently and resist external forces. In addition, the ASCZ component also provided PU-PSA with the polar groups required for adhesion. Therefore, PUA-AD20% had excellent adhesion properties. Compared to PUA, PUA-AD20% tack and peel strength increased by 36.1 % and 146.8 %, with values of 4.9 N and 11.6 N, respectively. In summary, this work offered a simple and versatile approach to designing PU-PSA with outstanding overall performance.
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Surfaces and Interfaces
·
2023
·
IF 6.2
Wen-Jie Jin,Shuang Dong,Jin-Ping Guan,Xian-Wei Cheng,Chuan-Xiang Qin,Guo-Qiang Chen
Polyamide 56 (PA56) biomaterial with excellent flame retardancy, antibacterial and UV-protective properties is potentially applied in the field of security and protection. Here, a green and sustainable multifunctional coating (DOPO-ATU) was developed, and then it was applied to modify PA56 fabric. The DOPO-ATU showed excellent flame retardancy to PA56 fabric. With 7.8 % weight gain, the coated PA56 fabric possessed a high LOI value of 30.1 % and a low damaged length of 11.1 cm without dripping. In cone calorimeter test, the peak heat release rate and average effective heat of combustion decreased by 20.5 % and 46.4 % versus pristine one, showing excellent fire safety. Further analysis proved that DOPO-ATU mainly acted in the gas-phase through the action of diluting non-combustible gases and quenching free radicals. In addition, the coated PA56 fabrics also displayed excellent antibacterial property and UV-protective properties. This work provides a cleaner and sustainable approach for preparing multifunctional coating for PA56 protective biomaterials.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Jiazhao Yang,Fan Liu,Changshun Zhou,Hejie Li,Gaolin Yang,Shiyuan Fang,In-Seop Lee,Yi Liu,Hao Bai,Cen Chen
The modification of 3D printed porous titanium (Ti), especially for the internal pore structure , is critical and has received more attention to promoting its osteogenesis for clinical use. Ultra-violet (UV) responsive chitosan (CSMA), as an injectable filling material, was firstly incorporated into porous Ti, and then CSMA was in-situ mineralized by carbon oxide (CO 2 ) diffusion (CSMA/CaCO 3 ). Their physical-chemical and biological properties were investigated in vitro . CaCO 3 crystals within CSMA hydrogels were successfully deposited into pores of porous Ti, which exhibited favorable biocompatibility. Ti implants filled with CSMA/CaCO 3 promoted adhesion and proliferation of bone mesenchymal stem cells (BMSCs). Moreover, Ti implant filled CSMA/CaCO 3 hydrogels could increase alkaline phosphatase (ALP) activities, up-regulate osteopontin (OPN) and osteocalcin (OCN) expression levels, and enhance extracellular mineralization. 3D printed porous Ti filled with mineralized UV-responsive chitosan hydrogel could promote proliferation and osteogenesis of BMSCs, and have great potential for the modification of porous Ti implants in bone tissue engineering.
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WATER RESEARCH
·
2023
·
IF 12.8
Nannan Wu,Wenrui Xiang,Feng Zhu,Zongli Huo,Zunyao Wang,Ruijuan Qu
This work was to investigate the transformation of coexisting decabromodiphenyl ether (BDE-209) on microplastics and their possible interactions in UV/chlorine process. Compared with pristine microplastics, the highly aged polystyrene (PS) showed an inhibitory effect on degradation of BDE-209. Increasing initial concentration of BDE-209 on PS inhibited degradation, while the chlorine concentration and pH did not affect the final degradation efficiency. Moreover, the presence of NO 3 − , SO 4 2− , HCO 3 − and HA in water was unfavorable for BDE-209 degradation. According to the experimental and calculation results, the contribution to the degradation of BDE-209 was ranked as direct photolysis > HO• > •Cl in the UV/ chlorine system. Chlorination products released by PS during UV/chlorination were detected. Four possible reaction pathways of BDE-209 were proposed, which mainly involved debromination, hydroxylation, chlorine substitution, cleavage of ether bond, and intramolecular elimination of HBr. It was worth noting that PS microplastics not only inhibited the degradation of BDE-209, but also affected the type and abundance of its transformation products. Meanwhile, interaction products of PS and BDE-209 were determined, which was attributed to reactions of PS-derived radicals with •Br/•C 6 Br 5 and •Cl. Results of toxicity evaluation showed that the introduction of carbon-halogen bonds, especially C-Br bond, increased the toxicity of chain scission products of PS. This work provides some new insights into transformation, interaction, and associated ecological risks of coexisting microplastics and surface adsorbed contaminants in the UV/chlorine process of drinking water treatment plants (DWTPs) and wastewater treatment plants (WWTPs).
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PubMed
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 6
·2031-2044
·
IF 2.3
LV Xiaojing,Wang Jinwei,Guo Yong,Guo Yanxin
Phosphorus-containing liquid epoxidate polybutadiene (PDCP-LEPB) is synthesized and used as a reactive additive to improve the water, wear and fire resistance of UV-curable acrylate coatings containing nano-SiO 2 as a filler. The structure of PDCP-LEPB and the curing condition are confirmed by Fourier transform infrared spectroscopy (FTIR). The addition of PDCP-LEPB should be controlled at around 10% as shown by thermal stability measurements; with the addition of PDCP-LEPB, composites show earlier degradation to release flame-retardant components, and thus the fire resistance of plywood is improved when its surface is applied by the composite coatings containing PDCP-LEPB. Besides, the fire protecting ability can be greatly enhanced with SiO 2 addition due to the synergistic effect of P, Si and Cl coexistence in the matrix. The addition of PDCP-LEPB improves the water resistance of plywood as reflected by the water absorption rates, contact angle measurements and stain resistance test due to the hydrophobic nature of olefin backbone and increment of crosslinking density; the addition of nano-SiO 2 has a much more positive effect on the improvement in their stain resistance and wear resistance due to the increase in surface roughness and stiffness, respectively.
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危险品化学品经营许可证（带存储）