Acta Biomaterialia
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2023
·
IF 9.7
Guangdong Sun,Xiuling He,Meilin Feng,Xia Xu,Jine Chen,Yongqiang Wang
Visible light-induced photocrosslinking techniques have attracted significant attention for their flexibility, controllability, safety, and energy conservation, especially in tissue engineering and biofabrication, compared to UV photocrosslinking. Despite these advantages, current photoinitiators are constrained by various challenges, including inadequate photoinitiation efficiency, low biocompatibility, poor water solubility, and limited compatibility with diverse crosslinking systems. Here, a water-soluble derivative of riboflavin, flavin mononucleotide (FMN − ), was used to assess its potential as an initiator in multiple-photocrosslinking systems, including radical photopolymerization, dityrosine, and ditryptophan coupling crosslinking, under blue light irradiation. Blue light irradiation facilitated an efficient electron transfer reaction between FMN − and persulfate, owing to their suitable spectral compatibility and photoactivity. The resulting oxidizing free radicals and excited triplet state of FMN − served as initiating active species for the multiple-photocrosslinking reactions. The combination of FMN − and potassium persulfate (KPS) exhibited exceptional photoinitiation efficiency for various biomaterials, including silk fibroin, gelatin, poly(ethylene glycol) diacrylate, and carboxymethyl cellulose modified with amino acids. Furthermore, the cytocompatibility of the FMN − /KPS photoinitiator was demonstrated by the survival rates of 3T3-LI fibroblasts encapsulated in it, which exceeded 95 % when compared to a commercial initiator. Statement of significance By introducing persulfate, the photoinitiation efficiency of flavin mononucleotide was significantly improved. The application scenarios of flavin mononucleotide and persulfate combinations were also greatly extended, including radical photopolymerization, dityrosine, diphenylalanine, and ditryptophan coupling crosslinking. Among them, the coupling crosslinking of amino acids (di-phenylalanine, and di-tryptophan) modified carboxymethyl cellulose, to our knowledge, was first reported. The excellent cytocompatibility of cell encapsulation further proved that the combinations of flavin mononucleotide and persulfate have great potential in tissue engineering.
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LANGMUIR
·
2023
·
IF 3.9
Manting Wang,Rongrong Fan,Qingjian Yu,Jie-Xin Wang,Yuan Le,Jian-Feng Chen
Controlled pesticide delivery systems offer many distinctive advantages over conventional pesticide formulations. In this work, degradable poly(N-isopropylacrylamide) (PNIPAM)–tannic acid (TA) microgels and multifunctional PDA@PNIPAM-TA nanocomposites were prepared in a high-gravity rotating packed bed reactor (RPB) for smart pesticide delivery and release. The as-prepared microgels and nanocomposites showed reversible temperature-dependent swelling/deswelling behavior and irreversible pH-induced degradation. A dynamic contact angle test suggested that the introduction of TA and PDA into the PNIPAM matrix could enhance foliar adhesion and deposition efficiency. The nanocomposites were further used for the encapsulation and delivery of imidacloprid (IMI) to protect it from rapid photolysis and improve its pest-control efficiency. Their thermoresponsive behavior as well as pesticide loading capacity could be tuned by tailoring the PNIPAM-TA shell thickness, which could be varied by the NIPAM amount. The release rate of IMI from the core/shell nanocomposites was positively correlated with environmental temperature and near-infrared (NIR) light, which was adaptive to the positive temperature-dependent toxicity correlation of IMI and the increasing trend of pests under high temperature. The cumulative release of IMI was 23.5% at 25 °C, while it was 81.2% at 40 °C after 24 h of incubation, and the release rate was greatly enhanced under NIR irradiation. The results indicated that the facile control of pesticide release could be realized by regulating environmental conditions. This work also provides an idea for using high-gravity technology to conveniently construct a smart, effective, and environmentally friendly pesticide delivery system for sustainable crop protection.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Pengxiang Qiu,Jiawei Zhu,Chenxi Zhang,Tao Liu,Hao Fang,Lidong Shen,Shuai Zhang
Photocatalytic sterilization is attracting attention because of its potential to prevent the dissemination of antimicrobial resistance.Here, a novel silver-doped boron (AgB) photocatalyst was synthesized through a facile photodeposition approach, which was comprehensively characterized and implemented in photocatalytic disinfection of antibiotic-resistant bacteria (ARB). Compared with boron without doping, AgB demonstrated superior photocatalytic disinfection activity (5.57-log reduction in 60 min) towards Escherichia coil K-12 under solar light irradiation. More importantly, no ARB regrowth after 48 h was observed after the treatment by AgB-assisted photocatalysis. This efficient and stable disinfection was achieved because the doped Ag serves as an electron mediator, facilitating rapid electron transfer and effective separation efficiency of electron-hole pairs. Moreover, the tight bonding between Ag and boron reduces the dissolution of silver ions and improves the catalytic stability. These two features jointly benefit the production of reactive species, and the trapping experiments suggested that holes ( h + ) and superoxide radicals (•O 2 − ) played dominant roles in bacterial inactivation.
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Catalysis Science & Technology
·
2023
·Vol. 13
·期 22
·6519-6526
·
IF 5
Xincheng Li,Ruiyi Wang,Jin Zhang,Jing Wang,Yunwei Wang,Zhanfeng Zheng
The design of efficient photocatalysts for selective hydrogenation of phenylacetylene to styrene is challenging. Herein, TiO2 supported Ni2P nanoparticles (Ni2P/TiO2) were prepared by a simple low temperature in situ phosphating method. As an earth-abundant and low-cost material, the optimal catalyst exhibits excellent photocatalytic activity with 99.9% phenylacetylene conversion and 96.0% styrene selectivity at 80 °C under visible light irradiation. The adsorption of phenylacetylene was weakened due to the isolation effect and electronic effect of P, which inhibited the over-hydrogenation of styrene and assured its high selectivity. The introduction of P also promoted the light absorption of the catalyst and accelerated the activation of H2 to provide active H species, which improved photocatalytic performance. Besides, the introduction of P overcomes the disadvantages of easy oxidation of metallic nickel-based catalysts, which ensure the excellent stability and recyclability of the Ni2P/TiO2 photocatalyst.
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CATALYSIS COMMUNICATIONS
·
2023
·
IF 3.7
Chunxin Zhang,Jing Ni,Ning Ding,Hong Liu
Composite MgIn 2 S 4 /Bi 2 O 3 was prepared and applied to the photocatalytic degradation of tetracycline (TC) under visible light. Results showed that formation of type-II heterojunction extended the visible light response range of the composite to 628 nm, effectively limiting the rapid recombination of photogenerated carriers. Further, the degradation experiment showed that TC was effectively decomposed by the composite. The main active substances for degrading TC were SO 4 · − , ·OH, h + and 1 O 2 . Cycling experiments showed that the TC removal rate by MgIn 2 S 4 /Bi 2 O 3 photocatalytic material was still as high as 75% after 4 cycles without any obvious changes in the crystalline phase structure.
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APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Guangxin Zhang,Shilin Li,Yifei Li,Xiongbo Dong
The 2D/1D structure of ZnIn 2 S 4 /attapulgite was constructed by anchoring ZnIn 2 S 4 nanosheets on the surface of attapulgite nanorods for the removal of tetracycline hydrochloride (TC) and rhodamine B (RhB). The 2D ZnIn 2 S 4 was closely combined with the 1D attapulgite, and ZnIn 2 S 4 /attapulgite had a higher BET surface area (83.6 m 2 /g) than pure ZnIn 2 S 4 (13.6 m 2 /g). The combination of ZnIn 2 S 4 and attapulgite promoted pollutant adsorption by providing more exposed active sites and a larger contact area, which also contributed to enhanced photocatalytic performance. Under visible light irradiation, the as-prepared ZnIn 2 S 4 /attapulgite composites exhibited enhanced photocatalytic activity when compared with pure ZnIn 2 S 4 . After 9 min (50 min) of irradiation, the optimized ZnIn 2 S 4 /attapulgite photocatalyst removed about 99.9% RhB (82.1% TC). In addition, the ZnIn 2 S 4 /attapulgite photocatalyst demonstrated excellent photostability and availability. Compared with other photocatalysts, the samples in this work used natural minerals as the carrier, which significantly improved the dispersibility and adsorption performance of the catalyst, and was conducive to the improvement of catalytic performance. This work contributed to the development of photocatalysis for the removal of environmental liquid-phase pollutants.
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RSC Advances
·
2015
·Vol. 5
·期 108
·88965-88972
·
IF 3.84
K. Cheng,H. P. Wan,W. J. Weng
In the present study, the effects of nanostructure on the light-induced cell detachment property of anatase TiO2 films are investigated and discussed. Anatase dense films, nanodots films and porous films are prepared through sol–gel and phase separation-induced self-assembly based methods. It is found that all the films possessed good cell adhesion but there is a decrease in cell proliferation in the dense film. The porous film exhibits improved cell detachment performance in both single cell and cell sheet detachment tests. It only takes about 3 min of ultraviolet illumination for cell sheets to detach from the porous film, while those for nanodots film and dense film are 5 min and 10 min, respectively. The cell sheets harvested show good performance and thus can be further utilized in cell sheet tissue engineering. The beneficial effects of film nanostructure are ascribed to the differences of initial adsorption status of extracellular proteins, as well as their changes after ultraviolet illumination. The present work demonstrates that optimization of film nanostructures could be an effective approach to improve light induced cell sheet harvesting.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 48
·2305423
·
IF 19
Yanyu Deng,Zhiguo Zhang,Guanhua Ren,Zhiqi Li,Chunyu Liu,Wenbin Guo
The surface treatment for solution-processed perovskite films using molecular passivation agents has been reported to be critical for improving the performance of perovskite light-emitting diodes (PeLEDs). Generally, most studies emphasized the binding effect between passivation molecules and perovskite surface, while halide perovskites are dominated by multiple defects and need more comprehensive passivation, which is often neglected. Here, a molecule of 5-ammonium valeric acid trifluoroacetate (5-AVATFA) with multi-functional groups is rationally developed to modify the interface of advanced PeLEDs. Combining experimental and density functional theory analysis, the synergism effects of reduced surface defects and increased steric hindrance of 5-AVATFA, which can greatly suppress the ion migration of PeLEDs, are demonstarated. Because of the passivation effect of multi-functional 5-AVATFA, an optimal device with an external quantum efficiency of 22.32%, a radiance of 558.46 W sr −1 m −2 , and an extended half-lifetime of 103.3 h is obtained.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xiangdong Cao,Junsheng Hong,Zhonglei Zhang,Junda Li,Jihua Tang,Jiaqi Wang,Duo Yi,Xuejin Li,Yu Du,Xiaoqing Tian
Flower-like zinc oxide nanoclusters were successfully incorporated by different amount of PTCDA organic dye molecular, forming the hetero-structured PTCDA/ZnO composites. Remarkably, a study performed on their NO 2 sensing properties reveals that the 0.5 wt% PTCDA-loaded ZnO sensor exhibits high response, excellent selectivity, quick response speed and low detection limit of 7.4 ppb towards NO 2 molecules at room temperature (25 °C) under green light illumination, which possesses an apparent advantage over the ZnO sensors loaded with other PTCDA concentration as well as upon other light illumination conditions . This work makes a meaningful contribution to the development of NO 2 sensor based on wide-band gap semiconductors with visible light irradiation .
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ChemCatChem
·
2023
·Vol. 15
·期 22
·e202300919
·
IF 4.5
Ying Wang,Yonglong Li,Zhao Zhang,Wei Xie
Graphical Plasmonic photocatalysis : A boosting hot-electron-hole separation driven by interfacial contact potential enables high photocatalytic activity on Au core -Ag shell bimetallic nanoparticles towards the four-electron reduction of 4-NTP to 4,4′-DMAB. Plasmonic photocatalysis under visible-light irradiation has long been regarded as a very promising strategy for inducing chemical transformations. However, the efficient utilization of these hot electrons on monometallic nanoparticles to induce chemical reaction remains a challenging subject. Here, we study plasmonic hot electron activity of Au core -Ag shell bimetallic nanoparticles towards the four-electron reduction of 4-nitrothiophenol to 4,4′-dimercaptoazobenzene. Our results show that Au core -Ag shell nanoparticles possess a higher catalytic activity than pure Au and Ag nanoparticles and the photocatalytic transformation is strongly dependent on the thickness of Ag shell. The plasmonic catalytic activity could be explained by a boosting hot-electron-hole separation driven by the contact potential at the bimetallic interface. This work provides new opportunities to enhance the efficient utilization of hot electron for plasmonic photocatalysis reaction.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Huaying Zhong,Yi Zhang,Yangmin Gong,Chuyun Wan,Yufei Zhang,Mingming Zheng
Stimuli-responsive Pickering interfacial biocatalysis (PIB) platforms are highly desirable due to their convenient product extraction and catalyst recovery. Light-responsive PIB stabilized by immobilized biocatalyst particles, which serve as both emulsifiers and catalysts, have not attracted enough attention. Herein, a novel and effective ultraviolet/visible light-responsive PIB system is proposed to facilitate reversible emulsification/demulsification. The modified hollow mesoporous silica nanospheres (HMSS-N) with photochromic spiropyran (SP-COOH) were utilized as a light-responsive emulsifier and carrier of lipase CL (CL@HMSS-SP). The light-responsive performance and catalytic performance of the PIB system were also studied in detail. As a result, the O/W emulsion demulsification or emulsification could be easily accomplished by inducing ultraviolet or visible light to change the surface wettability of the smart emulsifiers. The system exhibited the highest catalytic activity in the model esterification reaction between n-hexanol acid and 1-hexanol that has been reported so far (a catalytic efficiency value of 80.9 mmol g–1 h–1), which is a 12.6-fold enhancement compared with the conventional free enzyme one-phase system. The robust system maintained high catalytic activity even after 10 cycles, averaging 148.2 g of product g–1 biocatalyst. Thus, the ultraviolet/visible light-responsive PIB gives insights into the biocatalytic synthesis of flavor esters with high efficiency and stable reusability and shows great potential for cleaner production in the future.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Xin Chen,Ren Zhongguo,Zhang Leran,Yang Liang,Wang Dawei,Hu Yanlei,Li Jiawen,Chu Jiaru,Zhang Li,Wu Dong
Inspired by the flexible joints of humans, actuators containing soft joints have been developed for various applications, including soft grippers, artificial muscles, and wearable devices. However, integrating multiple microjoints into soft robots at the micrometer scale to achieve multi-deformation modalities remains challenging. Here, we propose a two-in-one femtosecond laser writing strategy to fabricate microjoints composed of hydrogel and metal nanoparticles, and develop multi-joint microactuators with multi-deformation modalities (>10), requiring short response time (30 ms) and low actuation power (<10 mW) to achieve deformation. Besides, independent joint deformation control and linkage of multi-joint deformation, including co-planar and spatial linkage, enables the microactuator to reconstruct a variety of complex human-like modalities. Finally, as a proof of concept, the collection of multiple microcargos at different locations is achieved by a double-joint micro robotic arm. Our microactuators with multiple modalities will bring many potential application opportunities in microcargo collection, microfluid operation, and cell manipulation.
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