Materials Horizons
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2022
·Vol. 9
·期 5
·1479-1488
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IF 15.717
Can Zou,Qing Liu,Kai Chen,Fei Chen,Zixuan Zhao,Yunxuan Cao,Congcong Deng,Xingfu Wang,Xiaohang Li,Shaobin Zhan,Fangliang Gao,Shuti Li
Polarization-sensitive photodetectors are the core of optics applications and have been successfully demonstrated in photodetectors based on the newly-emerging metal-halide perovskites. However, achieving high polarization sensitivity is still extremely challenging. In addition, most of the previously reported photodetectors were concentrated on 1D lead-halide perovskites and 2D asymmetric intrinsic structure materials, but suffered from being external bias driven, lead-toxicity, poor stability and complex processes, severely limiting their practical applications. Here, we demonstrate a high-performance polarization-sensitive and stable polarization-sensitive UV photodetector based on a dendritic crystal lead-free metal-halide CsCu2I3/GaN heterostructure. By combining the anisotropic morphology and asymmetric intrinsic structure of CsCu2I3 dendrites with the isotropic material GaN film, a high specific surface area and built-in electric field are achieved, exhibiting an ultra-high polarization selectivity up to 28.7 and 102.8 under self-driving mode and −3 V bias, respectively. To our knowledge, such a high polarization selectivity has exceeded those of all of the reported perovskite-based devices, and is comparable to, or even superior to, those of the conventional 2D heterostructure materials. Interestingly, the unsealed device shows outstanding stability, and can be stored for over 2 months, and effectively maintained the performance even after repeated heating (373K)-cooling (300K) for different periods of time in ambient air, indicating a remarkable temperature tolerance and desired compatibility for applications under harsh conditions. Such excellent performance and simple method strongly show that the CsCu2I3/GaN heterojunction photodetector has great potential in practical applications with high polarization-sensitivity. This work provides a new insight into designing novel high-performance polarization-sensitive optoelectronic devices.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 16
·52001
·
IF 3.125
Shujian Zhang,Yang Lu,Kewu He,Xianghui Meng,Lanfang Que,Zhenbo Wang
To solve the issues of low ionic conductivity, poor interfacial stability, and weak mechanical strength in the current polymer electrolytes, herein, the UV curing method is proposed to in-situ polymerize the plastic crystal composite solid polymer electrolyte (S-PCCE). By using ethoxylated trimethylolpropane triacrylate (ETPTA) as polymerization monomer, in conjunction with the butadiene nitrile and other additives, the S-PCCE is prepared under ultraviolet light. The S-PCCE shows improved ionic conductivity than other solid electrolyte materials. The ionic conductivity at room temperature can reach 0.98 × 10 −3 S/cm, and it can reach 2.8 × 10 −3 S/cm at 55°C, which is beneficial to achieve high battery performance. The LiFePO4/S-PCCE/Li battery has a high initial discharge specific capacity of 150.4 mAh/g at 0.2C, and the highest discharge specific capacity can reach 162.5 mAh/g. Moreover, after 100 cycles, the battery can still maintain a high discharge specific capacity of 154.2 mAh/g, with a Coulomb efficiency of 98.4%. At the same time, the electrolyte has excellent high-temperature adaptability, and can still work stably at 55°C with improved ionic conductivity. The superior performance of this material indicates that the plastic crystal composite polyacrylate solid electrolyte based on UV curing method can be used to prepare a high-performance lithium-ion battery, and this technology can also be compatible with existing lithium-ion battery equipment.
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COMPOSITES PART B-ENGINEERING
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2021
·
IF 9.078
Yuyang Zhou,Benjamin Tawiah,Nuruzzaman Noor,Zheng Zhang,Jun Sun,Richard K.K. Yuen,Bin Fei
The integration of bio-based functional agents with biopolymers is welcomed as a way of meeting the growing demand for healthy, safety, and sustainability. This study presents a facile and solvent-free fabrication of flame retardant (FR), UV protective, and reinforced poly(lactic acid) (PLA) composite using two bio-based complexing couples: tannin acid/ferric salt (TAFe) and chitosan/phytic acid (CTSPA). The thermal and burning properties of PLA composites were evaluated by thermogravimetric analysis (TGA), limited oxygen index (LOI), UL-94 test, and cone calorimetry . The UV protective and tensile properties were also evaluated. PLA/TAFe and PLA/CTSPA showed earlier mass loss and higher char residue than pristine PLA. CTSPA (3 wt%) enhanced the LOI value of PLA from 19.6% to 30.5%. PLA/CTSPA and PLA/TAFe/CTSPA achieved V-0 ratings in UL-94 test with slight melt dripping. Cone calorimetry demonstrated that 2.5 wt% apiece of TAFe and CTSPA led to obvious reductions in peak heat release rate and total heat release. Interestingly, the combination of TAFe and CTSPA was effective in suppressing CO production. PLA/TAFe had a higher UPF value (50+) and tensile strength than pristine PLA. In conclusion, the sustainable strategy developed in this study represents the concept of fabricating fully bio-based polymer composites via a solvent-free process, which can also be generalized into the eco-design for other multifunctional polymer systems .
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DYES AND PIGMENTS
·
2021
·
IF 4.889
Yingying Zhang,Yanliang Zhao,Bo Song,Chaobo Huang
Acidic pH is an important physiological parameter in environment and biological systems. Thus, designing a probe ( Hcy-F ) with good characters to monitor acidic pH is really important. Herein, a small molecular water-soluble probe is designed based on indole with high selectivity and sensitivity for detection the acidic pH in aqueous solution and living cells. When pH variation of aqueous is detected by probe, an obvious ratiometric and good linear response behavior are found in UV–vis absorption spectrum (R 2 = 0.9973, A 434 nm / A 371 nm = 6.9929–4.2231 pH) and fluorescence emission spectrum (R 2 = 0.9987, I 571 nm / I 514 nm = 7.2935–2.981 pH), which further proved the feasibility of Hcy-F to monitor the change of acidic pH in aqueous, respectively. Furthermore, Hcy-F is successfully applied for monitoring pH variation in living cells in dual channels (green and red) with higher cell survival rate, indicating the probe has great potential for pH imaging in biological applications .
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Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Xiaofeng Huang,Qiulin Deng,Huiwei Liao,Hongquan Deng,Jinlong Jiang,Lixiong Zhang,Xinjun Yao
The treatment process of metal plating wastewater in industry usually exists excessive consumption of chemicals, coproduction of sludge and complex reuse of metal. At present, some available technologies have been designed for effective removal of specific metal ions rather than entire metals ions in effluents. Herein, a novel strategy of treating waste with waste is proposed that using metal plating wastewater containing Zn(Ⅱ) to prepare 3D Luffa cylindrical (LC) / heterogeneous ZIFs (h-ZIF-8) composite (LC/h-ZIF-8) for photocatalytic degradation of organic pollutants (Nitrofurazone (NFZ), Methylene blue (MB), Rhodamine B (RhB) and Congo red (CR)) and mixed-dye wastewater. The strategy realized the efficient treatment of electroplating wastewater, expediently reuse of metal ions and removal of organic contaminants . Moreover, investigations of cycling performance indicated the photocatalytic stability and easy separation from water. Furthermore, the spectroscopy and electrochemical are employed to elaborate possible degradation mechanisms, expounding the LC/h-ZIF-8 possess lower recombination rates of carriers and transfer resistance of electron compared with ZIF-8. Therefore, the work proposes a new strategy for the efficient treatment of metal wastewater and achieves the combination of resource recovery and wastewater treatment with the advantages of simple operation and mild conditions.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10942-10952
·
IF 3.553
Fan Chunying,Luo Yan
Plastic wastes have posed serious environmental and health issues. Recycling plastic wastes to produce value-added products, however, still remains challenging. Herein, porous nanocomposites derived from polyethylene film wastes were fabricated via thermally induced phase separation method, in which they were employed as supported substrates to self-assemble functional components into multifunctional materials with unique property profiles. The resulting polymeric porous nanocomposites consisting of hybrid nanoparticles and flexible polyethylene bulk not only provided excellent UV resistance, but also ensured superior mechanical robustness against external decomposition and injuries. Specific properties and functionalities, including the sequential combination of functional ink and superhydrophobic layer, were successfully incorporated into the porous nanocomposites by altering functional components. The self-assembly properties of these final multifunctional materials were demonstrated by different performance tests, such as indicating temperature, conductive electrode, superhydrophobic layer. It is found that our fabrication methodology holds great potential for efficient recovery of polyethylene film wastes toward advancing sustainability goals. Furthermore, the proposed self-assembly strategy provides a promising route to develop multifunctional materials with tunable functions and high performance for future designing of smart materials.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2020
·
IF 6.551
Xinqiang Chang,Tao Lin,Wei Chen,Hang Xu,Hui Tao,Yuehong Wu,Qingwen Zhang,Shunzhong Yao
The main purpose of this study was to control membrane fouling by degrading natural organic matter, mainly based on free radicals, with a dead-end ultrafiltration system integrated with pretreatment . Four advanced oxidation processes , namely, ultraviolet (UV)/Fe(II), UV/persulfate (PS), Fe(II)/PS and UV/Fe(II)/PS, were used to pretreat raw water prior to ultrafiltration. The priority of the pretreatment effect followed the order of UV/Fe(II)/PS > Fe(II)/PS > UV/PS > UV/Fe(II). In the UV/Fe(II)/PS pretreatment (Fe(II) = 100 μM and PS = 400 μM), the removal rates of UV 254 with a UV irradiation time of 60 min reached 93.07%. Degradation experiments of free-radical probes (carbamazepine) and free-radical scavenger addition (sodium hyposulfite or tert-butanol) showed that the sulfate radical (SO 4 − ) was dominant in degrading organic compounds. The specific flow rate ( J / J 0 ) increased by 139.13% and the irreversible fouling resistance was reduced by 69.94%. The total interfacial energy of the colloid-membrane interaction decreased by 84.42% and the separation distance was shortened to ~2 nm. The release of Fe(III) from water under UV radiation and its possible conversion to Fe(II) were observed on the surface of the fouled membranes. After UV/Fe(II)/PS pretreatment, bulky and rough pollutant particles were transformed into a slew of sheet-contaminated layer with the appearance of numerous permeable holes, and the average surface roughness was reduced to 38.1 nm according to atomic-force-microscopy characterization.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 8
·3194-3205
·
IF 3.288
Jiabin Liu,Bowen Yang,Minghuan Gao,Lisha You,Yuansen Zhang,Zhiying Li,Linna Guo,Tiesheng Li,Penglei Chen,Minghua Liu
A series of novel efficient polyhedron-like WO3/butterfly-like Ag2MoO4 p–n junction photocatalysts (denoted as AMW-x) were designed and synthesized. The exact phase structure, microscopic morphology, electrochemical properties, physical properties and optical properties of the prepared samples were characterized by XRD, SEM, EDS, TEM, HRTEM, UV-DRS, PL, FL, XPS, UPS, BET, MS (Mott–Schottky test), EIS and photocurrent measurements. The photocatalyst could effectively degrade rhodamine B (RhB) under UV/Solar region light illumination. In this system, a p–n junction structure formed by the two different materials effectively enhanced the generation rate of photo-induced electrons and reduced the transfer resistance. These results exhibited that enhanced photocatalytic performance of materials were prepared. The activity of AMW-20 was 548.2/496.8, 57.9/146.1, and 3.7/17 times higher than polyhedron-like WO3, butterfly-like Ag2MoO4, and commercial powder (P25) under UV/Solar region light illumination. The photocatalytic mechanism mode for the improved photocatalytic performance was also proposed.
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International Journal of Environmental Research and Public Health
·
2020
·Vol. 17
·期 2
·651
·
IF 2.849
Xinxin Huang,Yuanyuan Li,Tantan Wang,Hui Liu,Jiaqi Shi,Xuesheng Zhang
Organic UV filters are a kind of emerging pollutants, which have been widely used in personal care products (PCPs). This study evaluated the effects of benzophenone-4 (BP-4), 4-aminobenzoic acid (PABA), and 2-phenylbenzimidazole-5-sulfonic acid (PBSA) on the selected indices of antioxidative responses in zebrafish (Danio rerio) liver. Zebrafish were exposed to two different doses (i.e., 0.5 and 5 mg L−1) of semi-static water with three individual compounds. Liver samples were collected on 7 and 14 days to analyze biochemical indicators, including superoxide dismutase (SOD), glutathione S-transferase (GST), reduced glutathione (GSH), and malondialdehyde (MDA). Oxidative stress occurred in zebrafish liver with significantly changed indicators during the whole exposure period. Different experimental groups could induce or inhibit the activity of antioxidant enzymes with varying degrees. With a prolonged exposure time and increased exposure dose, the hepatic lipid peroxidation was also obviously observed. Moreover, the toxicity order of three organic UV filters was analyzed using the integrated biomarker response (IBR) index and the results indicate that exposure to PABA for 7 days at 0.5 mg L−1and PBSA for 7 days at 5 mg L−1induced the most severe oxidative stress in the liver of zebrafish.Keywords:organic UV filters;oxidative stress;lipid peroxidation;integrated biomarker response;zebrafish
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BIOMACROMOLECULES
·
2021
·
IF 6.988
Heng Fang,Nianrong Feng,Dongfu Wu,Dongying Hu
The collection, storage, and use of energy and information are important issues for overcoming the global energy shortage while satisfying the demand for information transmission. This research reports a nano-Fe3O4 and erythritol (ER)-functionalized, cross-linked methyl cellulose aerogel (MC–EP) composite that has the characteristics of phase-change energy storage as the magnetic and ultraviolet responses requisite for light-to-heat conversion and storage. The nano-Fe3O4 particles in MC–EP–ER-75 were fixed and filled into pore structures in MC–EP. ER was used to form an effective combination with MC–EP. The addition of nano-Fe3O4 compensated for the low thermal conductivity of ER. The MC–EP–ER-75 was able to store solar radiation-induced energy due to the loading of ER at a photothermal conversion efficiency of 79.67% and a light-to-heat conversion efficiency of 79.67%. The results of thermal stability (TGA) analysis showed that MC–EP–ER-75 was thermally degraded acceptably below 200 °C. The differential scanning calorimetry curve and latent heat values (melting/crystallization enthalpies of 314.8 and 197.9 J/g, respectively) of MC–EP–ER-75 did not change after 100 cycles. In addition, it exhibited excellent saturation magnetization, super-paramagnetism, and ultraviolet shielding, as well as a rapid response to the ultraviolet and magnetic fields. This provided a way to prepare light-to-heat conversion–storage–release materials and ultraviolet–magnetic sensors that can be used in renewable resources.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuchun Li,Shuang Qiu,Jun Sun,Yajing Ren,Shuheng Wang,Xingguo Wang,Wenjia Wang,Hongfei Li,Bin Fei,Xiaoyu Gu,Sheng Zhang
Despite the advantages of biological compatibility and high transparency, there are still some drawbacks for Poly(lactic acid) (PLA) such as highly flammability and poor ultraviolet resistance. Herein, a fully bio-based additive (PA@CHTM) with a core–shell structure is synthesized by chitosan microspheres and phytic acids. The introduction of PA@CHTM simultaneously improves the mechanical properties, flame retardancy, and UV-blocking performance of PLA, accompanied by an accelerated degradation capacity in soil. By the presence of 9 wt% PA@CHTM in the PLA composite sample, the limiting oxygen index value is increased from 18.2% to 29.6%, and the UL-94 test grade is improved to V-0. The tensile strength is well maintained and Young's modulus is sharply increased for PLA/PA@CHTM composites. Moreover, the photoaging process of PLA can be significantly delayed due to the excellent free radical quenching capacity of PA@CHTM. Only less than 10% UV light can be penetrated for the PLA/9%PA@CHTM sample, and the ultraviolet protection factor is increased from 0.77 of control PLA to 30.07. More importantly, the addition of PA@CHTM can accelerate the degradation of PLA, which is of significance for biodegradable materials. This work firstly provides a green strategy to fabricate fully bio-based polymer composites with high performance, long service life, and rapid degradation in soil.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Rui Wang,Xuexue Wang,Yijing Zhan,Zheng Xu,Zongqi Xu,Xiaohai Feng,Sha Li,Hong Xu
Novel sunscreen products based on bioadhesive/gel systems that can prevent the skin penetration behaviors of UV filters have attracted increasing attention in recent years. However, integration is very difficult to achieve and control on the wet surface of the skin under sweaty/dynamic physiological conditions, resulting in functional failure. Herein, we demonstrated the fabrication of a novel dual-network hydrogel sunscreen (DNHS) based on poly-γ-glutamic acid (γ-PGA) and tannic acid (TA), which demonstrated prominent UV protection properties across broad UVA and UVB regions (360–275 nm). Due to a three-dimensional network microstructure and a highly hydrated nature that mimics the extracellular matrix of natural skin, DNHS can perfectly match the skin surface without irritation and sensitization. In addition, the intermolecular hydrogen bond interactions of γ-PGA and TA provide an important driving force for coacervation, which endows the DNHS with remarkable self-recovery properties (within 60 s). Moreover, due to the multiple interfacial interactions between γ-PGA/TA and the protein-rich skin tissue surfaces, DNHS simultaneously possesses excellent skin-integration and water-resistance capacities, and it can be readily removed on demand. Our results highlight the potential of the DNHS to be used in next-generation sunscreens by providing long-term and stable UV protection functions even under sweaty/dynamic physiological conditions.
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危险品化学品经营许可证（带存储）