CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hao Liu,Shihai Cao,Liang Chen,Kun Zhao,Chunbo Wang,Mengxin Li,Shigang Shen,Wenjing Wang,Lei Ge
Harvesting value-added products by CO 2 reduction through photocatalysis is a sustainable approach. Against halogen-doping treatment, few-layer iodinene (FLI 2 ) was used innovatively to construct 2D/2D van der Waals heterojunction with carbon nitride nanosheets (CNNS) for CO 2 reduction under visible light irradiation. The photocatalyst achieved an enhanced CO production rate of 34.22 μmol g -1 h −1 , which was 7.76 times as pristine CNNS. Improved activity was attributed to FLI 2 /CNNS maintained tri-s-triazine crystal structure and polymeric framework of CNNS. FLI 2 /CNNS formed a contact interface by van der Waals force, where FLI 2 served as an electron acceptor and CNNS acted as an electron donor, beneficial for electron transfer. This carrier migration tendency in FLI 2 /CNNS was confirmed by the DFT calculation of Fermi level and electron density distribution, which led to increased charge separation and decreased charge recombination. This work proposes the novel 2D/2D FLI 2 /CNNS and highlights the potential of metal-free heterojunction for efficient photocatalysis.
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Advanced Science
·
2021
·Vol. 9
·期 1
·2101527
·
IF 16.806
Min Qian,Ziqiang Cheng,Guanghong Luo,Massimiliano Galluzzi,Yuehong Shen,Zhibin Li,Hongyu Yang,Xue-Feng Yu
Chemodynamic therapy (CDT) is an emerging treatment that usually employs chemical agents to decompose hydrogen peroxide (H 2 O 2 ) into hydroxyl radical (•OH) via Fenton or Fenton-like reactions, inducing cell apoptosis or necrosis by damaging biomacromolecules such as, lipids, proteins, and DNA. Generally, CDT shows high tumor-specificity and minimal-invasiveness in patients, thus it has attracted extensive research interests. However, the catalytic reaction efficiency of CDT is largely limited by the relatively high pH at the tumor sites. Herein, a 808 nm laser-potentiated peroxidase catalytic/mild-photothermal therapy of molybdenum diphosphide nanorods (MoP 2 NRs) is developed to improve CDT performance, and simultaneously achieve effective tumor eradication and anti-infection. In this system, MoP 2 NRs exhibit a favorable cytocompatibility due to their inherent excellent elemental biocompatibility. Upon irradiation with an 808 nm laser, MoP 2 NRs act as photosensitizers to efficiently capture the photo-excited band electrons and valance band holes, exhibiting enhanced peroxidase-like catalytic activity to sustainedly decompose tumor endogenous H 2 O 2 to •OH, which subsequently destroy the cellular biomacromolecules both in tumor cells and bacteria. As demonstrated both in vitro and in vivo, this system exhibits a superior therapeutic efficiency with inappreciable toxicity. Hence, the work may provide a promising therapeutic technique for further clinical applications.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Yingyi Zhao,Wenjun Lu,Yinan Zhang,Xianmin Liu,Baiwang Sun
The proper management of radioactive iodine waste generated from nuclear energy has become one of the challenges in the sustainable development of nuclear power. With the continuous development of POPs materials, their high-efficiency iodine adsorption performance has been demonstrated to be related to the material's structural units and porous structure. In light of this, three two-dimensional porous organic polymers were synthesized using environmentally friendly non-metallic catalyzed coupling reactions. Their excellent chemical stability and nitrogen-rich porous structure endowed them with the ability to exhibit outstanding capture performance and recyclability in various media. Its iodine adsorption performance reached 3.81 g/g, 3.55 g/g and 3.19 g/g respectively. The research results provide a potential pathway for the design and synthesis of organic porous polymers with good chemical stability and iodine adsorption performance, showcasing the significant potential of POP-PDTE, POP-PDTK, and POP-PDTB in capturing radioactive pollutants.
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BIOMACROMOLECULES
·
2023
·
IF 6.2
Hanchen Wei,Caiyun Yang,Feihu Bi,Bang Li,Rui Xie,Deshui Yu,Shuzhen Fang,Zan Hua,Qingqing Wang,Guang Yang
Glycopolymer-supported silver nanoparticles (AgNPs) have demonstrated a promising alternative to antibiotics for the treatment of multidrug-resistant bacteria-infected diseases. In this contribution, we report a class of biohybrid glycopolymersome-supported AgNPs, which are capable of effectively killing multidrug-resistant bacteria and disrupting related biofilms. First of all, glycopolymersomes with controllable structures were massively fabricated through reversible addition–fragmentation chain transfer (RAFT) polymerization-induced self-assembly (PISA) in an aqueous solution driven by complementary hydrogen bonding interaction between the pyridine and amide groups of N-(2-methylpyridine)-acrylamide (MPA) monomers. Subsequently, Ag+ captured by glycopolymersomes through the coordination between pyridine-N and Ag+ was reduced into AgNPs stabilized by glycopolymersomes upon addition of the NaBH4 reducing agent, leading to the formation of the glycopolymersome@AgNPs biohybrid. As a result, they showed a wide-spectrum and enhanced removal of multidrug-resistant bacteria and biofilms compared to naked AgNPs due to the easier adhesion onto the bacterial surface and diffusion into biofilms through the specific protein–carbohydrate recognition. Moreover, the in vivo results revealed that the obtained biohybrid glycopolymersomes not only demonstrated an effective treatment for inhibiting the cariogenic bacteria but also were able to repair the demineralization of caries via accumulating Ca2+ through the recognition between carbohydrates and Ca2+. Furthermore, glycopolymersomes@AgNPs showed quite low in vitro hemolysis and cytotoxicity and almost negligible acute toxicity in vivo. Overall, this type of biohybrid glycopolymersome@AgNPs nanomaterial provides a new avenue for enhanced antibacterial and antibiofilm activities and the effective treatment of oral microbial-infected diseases.
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Nature Protocols
·
2023
·
IF 14.8
Liu Yongchun,Miao Shuting,Ren Hao,Tian Lihua,Zhao Jian,Yang Peng
Two-dimensional (2D) protein films can be used to modify the properties of surfaces, and find applications predominantly in the fields of biomaterials, lithography, optics and electronics. However, it is difficult to produce scalable homogeneous and robust protein films with an easy, low-cost, green and efficient method. Further challenges include encapsulating and releasing functional building blocks in the film without inactivating them, and maintaining or improving the bioactivities of proteins used for the formation of the films. Here we detail the process to prepare large 2D protein films with user-defined features and structures via the amyloid-like aggregation of commonly synthesized proteins. These films can be synthesized at meter scales, have high interface adhesion, high functional expansibility and tunable functional properties, obtained by controlling the position of the disulfide bond breakage. For example, we can retain or even enhance the natural antibacterial, biomineralization and antifouling activity of proteins involved in film formation, and the properties can also be expanded through the physical blending or chemical grafting of additional functional blocks on the surface of the film. A 2D protein film can be prepared in ~3 h using four alternative coating techniques: immersion, transfer, hydrogel stamping and spraying. The characterization process of the film requires ~5 d. The procedure can be carried out by users with basic expertise in materials science.
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ENERGY & FUELS
·
2026
·
IF 6
Chen Qiyan,Pang Qing,Zhang Yue,Zheng Changyi,Huang Qing,Ma Dingyuan,Wen Tao,Zhao Rui,Peng Xiaoli,Xue Weidong
Aqueous
zinc–iodine batteries (ZIBs) exhibit great promise
for energy storage applications owing to their high safety, cost-effectiveness,
and environmental friendliness. However, the side reactions of the
Zn anode and the shuttle effect of polyiodides hinder the practical
application of ZIBs. Herein, we propose sodium alginate (SA) as a
bifunctional electrolyte additive to address both issues simultaneously.
At the Zn anode, SA reconstructed the Zn 2+ solvation sheath
and preferentially adsorbed on the anode surface, inducing the in
situ formation of a stable composite solid electrolyte interphase
(SEI) that effectively suppressed hydrogen evolution and dendrite
growth. At the I 2 cathode, the oxygen-containing polar
groups of SA coordinated with polyiodides, anchoring them in the cathode
region and substantially inhibiting the shuttle effect. In this work,
the Zn//Zn symmetric cell with 5 mM SA achieved a long cycling lifespan
of 2400 h at 1 mA cm – 2 and 1 mAh cm – 2 . Meanwhile, the Zn//I 2 full
cell maintained a high discharge specific capacity of 141.1 mAh g – 1 after 8000 cycles at 2 A g – 1 . This study simultaneously improved the electrochemical
behavior of both the anode and cathode via a facile modification strategy,
providing new insights for the design of ZIBs electrolytes.
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BIOCHEMISTRY
·
2023
·
IF 2.9
Panpan Qi,Quankuo He,Junjie Zhang,Yuanyuan Lian,Ting Xie,Jianying Dong,Dongting Zhangsun,Yong Wu,Sulan Luo
α-Conotoxin GI is a competitive blocker of muscle-type acetylcholine receptors and holds the potential for being developed as a molecular probe or a lead compound for drug discovery. In this study, four fatty acid-modified α-conotoxin GI analogues of different lengths were synthesized by using a fatty acid modification strategy. Then, we performed a series of in vitro stability assays, albumin binding assays, and pharmacological activity assays to evaluate these modified mutants. The experimental results showed that the presence of fatty acids significantly enhanced the in vitro stability and albumin binding ability of α-conotoxin GI and that this effect was proportional to the length of the fatty acids used. Pharmacological activity tests showed that the modified mutants maintained a good acetylcholine receptor antagonistic activity. The present study shows that fatty acid modification can be an effective strategy to significantly improve conotoxin stability and albumin binding efficiency while maintaining the original targeting ion channel activity.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Pei Chen,Hui Zhu,Tianhao Na,Yong Yi,Jian Zhou,Tao Duan,Jiehong Lei
The highly specific capture of radioactive iodine vapor generated during spent fuel reprocessing exerts a pivotal influence on ensuring the sustainable development of nuclear energy. In this study, we successfully prepared pyrazole-directed functionalized leather waste collagen fiber composite (Pyrazole@ACF) by immobilizing pyrazole ring through Schiff base reaction on the alkaline-activated collagen fiber (ACF) interface. The peak capacity for capturing iodine vapor by Pyrazole@ACF is shown to be 3.494 g/g, which is markedly higher compared to that of ACF (0.928 g/g). Pyrazole@ACF was characterized using FE-SEM, FT-IR, and XPS, revealing the release of numerous active functional groups from ACF that facilitated iodine-induced capture and pyrazole ring immobilization. Furthermore, the interaction mechanism between functional groups and iodine was further elucidated through Density Functional Theory (DFT) calculations. The iodine capture effect of Pyrazole@ACF is primarily ascribed to the existence of active functional groups (C = O, –OH, and –NH 2 ) on ACF, as well as the charge transfer occurring between the grafted pyrazole moieties and iodine, ultimately leading to the generation of I 3 − polyiodide complexes and subsequent iodine capture. Consequently, Pyrazole@ACF exhibits a strong specific capture capability for iodine vapor, along with excellent thermal stability and iodine immobilization properties, meeting the application requirements under practical conditions.
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OPTICAL MATERIALS
·
2023
·
IF 3.9
Chenchen Ding,Wenzhong Ma,Jing Zhong
The crosslinking degrees and microcrystalline structure determine the light transmission of polyvinyl alcohol (PVA) optical films and mechanical properties . Preparing a PVA optical film satisfying these two aspects with a low swelling propensity is still challenging. Herein, PVA optical films were prepared by solution casting with environment-friendly water as a solvent. Based on PVA's unique monoclinic lamellar crystal structure, the optical properties , such as light transmission and haze, were revealed by changing the original molecular weight , polymer concentration, and heat treatment conditions. We systematically investigated the effect of the original molecular weight and polymer concentration on the PVA crosslinking degrees. The crystal size effect on the optical properties was investigated through a heat treatment for the crosslinked PVA films. The rotational rheometer and swelling tests revealed the PVA crossling degrees. DSC and XRD are utilized to systematically investigate the relationship between the crystalline structure of PVA and its optical transparency and mechanical properties. The PVA optical films (F2099-8%) derived from 8 wt% PVA2099/water solution exhibit excellent light transmission with transparency of 90.2 % and haze of 0.4 % due to the smallest crystal size of 3.29 nm. An appropriate heat treatment process could further improve the mechanical and swelling-resistant properties. The F2099-8% sample after heat treatment (<200 °C, 30 min) had a significant enhancement of mechanical strength (200 % increase) and swelling resistance (300 % decrease), but only 6 % transmittance decreased, and 2 % haze increased because of crystal size increasing. The PVA optical films prepared in this work showed relatively high light transmission and high mechanical and swelling-resistant properties, which have a good potential application in display panels and camera lenses.
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RSC Advances
·
2023
·Vol. 13
·期 49
·34808-34816
·
IF 3.9
Zishan Hu,Yuanlin Li,Aijun Li,Hai-Hua Wang,Xiao-Feng Wang
Establishing stable and efficient Pt-free counter electrodes (CEs) is an important challenge for dye-sensitized solar cells (DSSCs). Ti3C2Tx MXene, with its high catalytic activity and conductivity, has gained attention as a CE in DSSCs. The focus of this paper is on the preparation of Ti3C2Tx decorated carbon nanotubes (CNTs) composite electrode materials (CNTs/Ti3C2Tx), and testing their performance as CEs in DSSCs. Through a series of electrochemical tests, a CNTs/Ti3C2Tx CE exhibits good electrocatalytic activity toward iodine-based electrolytes with low charge transfer resistance, which is close to the performance of a Pt CE. The photoelectric conversion efficiency (PCE) of the CNTs/Ti3C2Tx (1.0 wt%) CE-based DSSCs reaches 5.83%, which is much higher than that of the CNTs CE (3.70%), and approximates that of the Pt CE (6.61%). We attribute the improved performance to the synergistic effect of the excellent conductivity and unique two-dimensional chemical structure of Ti3C2Tx MXene. Moreover, the photostability test of continuous light exposure shows that the CNTs/Ti3C2Tx-1.0 wt% (C/T-1.0 wt%) CE exhibits good stability to the electrolyte. Therefore, CNTs/Ti3C2Tx composites can be used as an efficient Pt-free CE for DSSCs in the future.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Liuke Cai,Bin Xu,Yonghai Gan,Yiqun Liu,Zhihao Chen,Wenzhong Yang,Jie Zhang,Kaixiang Jiang
In this paper, functionalized CNTs and Fe 3 O 4 were compounded by co-precipitation method and the binder-free capacitive deionization (CDI) electrodes were innovative prepared by electrophoretic deposition (EPD) technique. The effects of applied voltage, flow rate and solution pH on the adsorption capacity of arsenic were investigated. The results confirmed that introduction of different functional groups (–COOH, -SO 3 H and -PO 3 H 2 ) and composite transition metal oxide (Fe 3 O 4 ) led to the materials not only with enhanced hydrophilicity but also with higher capacitance. The CDI test showed that trace arsenic can be effective treated to less 2 μg/L, which satisfied the World Health Organization (WHO) drinking water standard (below 10 μg/L). The CNTs-X@Fe 3 O 4 electrode was found to maintain specific adsorption of arsenic through selectivity experiments. In addition, the combined electro-sorption and chemisorption effectively produce higher adsorption capacity, faster adsorption rate and high selectivity. Therefore, the electrode prepared by EPD has a high prospect of application in arsenic removal by CDI.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wencheng Ma,Wenzhuo Li,Jinlong Jiang,Yi Xu,Wenrong Li,Xiaoyu Liu,Zehua Chen,Yong Jiang,Jiujun Zhang,Bing Zhao
Inactive (‘dead’) lithium and conventional fragile solid-electrolyte interphase (SEI) usually cause performance degradation and safety hazards in Li-metal batteries. Recovering inactive lithium and constructing stable SEI are urgently required to enhance the capacity and lifespan of lithium metal batteries. Herein, we have designed a novel dual-additives electrolyte containing an I 3 − /I − redox couple for reviving the inactive lithium, and caffeic acid (CA) that can be anion-polymerised to modulate the composition and improve stability of the SEI. It’s found that the generated I 3 − /I − redox couple can turn the inactive Li 2 O into soluble Li + , and prompt the formation of SEI composed of inorganic LiI, Li 3 N and organic RCOOLi with high stability. Density functional theory (DFT) calculations indicate that the diffusion potential barrier of Li + is significantly lower on the LiI-rich SEI interface, which can not only accelerate the transport of Li + at the interface, but also effectively prevent I 3 − from attacking Li metal. Benefiting from this elaborate dual-additives electrolyte design, the symmetrical-cells present a superior electrochemical performance, i.e., high critical current density up to 10 mA cm −2 , ultra-long lifespan over 7000 h at 1 mA cm −2 , and over 2500 cycles under harsh conditions of high temperature (50 °C) and high current density (5 mA cm −2 ). In addition, as a proof of concept for practical applications of Li-metal batteries, Li|LiFePO 4 full cell delivers excellent cycle stability and rate performance with low hysteresis voltage at a high cathode loading of 17.4 mg cm −2 .
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