JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Jianghai Wei,Xuewen Zheng,Weiteng Lin,Yu Si,Kemeng Ji,Chengyang Wang,Mingming Chen
Solid polymer electrolytes (SPEs) based solid-state lithium metal batteries (SSLMBs) are widespreadly practiced as one of the main technical routes aiming for chemically essential safety with acceptable energy density . However, uncontrollable Li dendrites growth and sluggish Li + transport remain obstacles to the further development of SPEs-based SSLMBs. Herein, a porous g-C 3 N 4 (PCN) is designed and introduced into polyethylene oxide (PEO). Within the following synthesized PEO-based composite solid electrolyte (PEO/PCN/LiTFSI CSE), PCN is found to be an attractive multifunctional filler. For its porous morphology and high specific surface area, abundant Lewis basic active sites are exposed, which facilitates Li + to be uniformly distributed in PEO/PCN/LiTFSI CSE and thus more effectively mitigates the Li dendrites growth comparing to those with bulk g-C 3 N 4 filler, making PCN-involved Li symmetrical cell (Li|PEO/PCN/LiTFSI|Li) run steadily for 1400 h under the current density of 0.1 mA cm −2 at 60 °C. PCN also accelerates Li + transport in the manner of reducing PEO crystallinity and promoting LiTFSI dissociation. The Li + conductivity of PEO/PCN/LiTFSI CSE reaches 3.47 × 10 −4 S cm −1 at 60 °C. Therefore, long life span and high rate performances are together achieved in SSLMB assembled with PEO/PCN/LiTFSI CSE. This work reveals a feasible strategy to fabricate dendrite-free SSLMBs cycling within a fairly long time.
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高影响因子
CURRENT APPLIED PHYSICS
·
2022
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IF 2.856
Xiaoxue Lian,Yan Li,Yunling Zou,Dongmin An,Qiong Wang,Qingjun Zhou,Xueqi Li
The g-C 3 N 4 nanosheets were synthesized by a multistage program calcination with different heating rate, which was an easy, low-cost, and quick method. The morphology and structure of samples were characterized by various techniques. The performance evaluation of the samples was tested by degrading Rhodamine B, Methylene Blue, Tetracycline Hydrochloride and P-Nitrophenol in visible light . The results show that the photodegradation properties of TP-g-C 3 N 4 prepared by multistage program calcination are the best than others. In particular, the degradation rate of TP-g-C 3 N 4 to Rhodamine B reached 99.6% in just 4 min. TP-g-C 3 N 4 catalyst has excellent stability and recycling performance. According to free radical capture experiments, •O 2 − may be the main active species for pollutant degradation. The possible photocatalytic degradation mechanism was also discussed. Due to the high specific surface area and a narrow band gap, the TP-g-C 3 N 4 becomes a promising photocatalyst.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7909-7922
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IF 4.682
Chai Chaofan,Yang Xuefang,Yang Xiaohua,Dong Chuan,Bian Wei,Choi Martin M. F.
Abstract The utilization of nanomaterial-based probes in detecting glutathione (GSH) and cell imaging has aroused extensive attention owing to the excellent properties of nanoprobes. Herein, we have synthesized manganese dioxide-S, O co-doped graphitic carbon nitride quantum dots (MnO 2 -S, O-CNQDs) nanocomposite by in situ synthesis of MnO 2 nanosheets in S,O-CNQDs dispersion solution. It was found that GSH could specifically bind to MnO 2 -S, O-CNQDs so that the fluorescence of S, O-CNQDs could be recovered. As such, a “turn-on” MnO 2 -S, O-CNQDs nanoprobe can be fabricated and applied to rapidly determine trace amounts of GSH. Under the optimal conditions, MnO 2 -S, O-CNQDs shows sensitive response to GSH in the range 10–270 μM with a detection limit of 0.307 μM ( S / N = 3). The developed MnO 2 -S, O-CNQDs probe has demonstrated great potential to detection of GSH in biological samples and glutathione injections. What is more, MTT assay indicates that MnO 2 -S, O-CNQDs has low biotoxicity. The non-fluorescence MnO 2 -S, O-CNQDs reacts with GSH to recover the fluorescence of S, O-CNQDs in HepG2 cells. Thus, the “turn-on” fluorescence change of MnO 2 -S, O-CNQDs offers a potentially useful tool to monitor GSH of cancer cells. Graphical Abstract
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2022
·
IF 5.723
Yan Ding,Kangping Cui,Xueyan Liu,Chen-Xuan Li,Zhi Guo,Minshu Cui,Yihan Chen
Herein, a new axial g-C 3 N 4 coordinated iron(III) phthalocyanine (FeP/CN) was fabricated for peroxymonosulfate (PMS) activation. Around 100% degradation of acetaminophen (AP), 2,4-dichlorophenol (2,4-DP), sulfadiazine (SDZ), and methyl orange (MO) (30 mg L -1 ) were achieved within 20 min by adding 0.02 g L -1 FeP/CN 5 (3.62 wt% Fe) and 0.2 mM PMS. High-valent iron-oxo species (Fe IV =O) was demonstrated as the main reactive species, which mediated a two-electron transfer process with pollutants. Characterizations and computational analysis revealed that the axial g-C 3 N 4 ligand provided Fe(III) coordination environments to generate Fe IV =O species directly through PMS activation, and increased the reactivity of the Fe IV =O species in pollutants oxidation due to the narrowed HOMO-LUMO gap. Besides, small displacement of Fe atom (0.23 Å) from the macrocycles plane due to the axial g-C 3 N 4 ligand decreased the iron demetalization rate from 3.54% to 0.28% in the catalyst/PMS system. This work offered an excellent strategy to design high-efficiency catalysts for Fe IV =O generation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Meng-Ting She,Jia-Wei Yang,Bo-Xin Zheng,Wei Long,Xuan-He Huang,Jun-Ren Luo,Ze-Xin Chen,Ao-Lu Liu,Dong-Peng Cai,Wing-Leung Wong,Yu-Jing Lu
A series of new mitochondrial-selective fluorescent probe was designed and synthesized based on the integration of two planar molecular scaffolds of benzo-indole/indole with a p -substituted styrene moiety. The small-sized probes are flexible and rotatable via an ethylene bridge. The restriction of free rotation upon interaction with targeting biomolecules of G-quadruplexes in mitochondria generates strong emission in visible range (575–615 nm). Cell imaging study showed that the ligands are targeting mitochondria but not nucleus. Competition experiments showed that the ligand BYM is highly selective towards mitochondrial G4-DNA structures against other non-G4 nucleic acid structures including single-/double-stranded DNA and hairpin. The equilibrium binding constant ( K eq ) of BYM interacting with mitochondrial G4-DNA (mt6363, K eq = 10.8 × 10 6 M −1 ) is almost 1000-fold higher than that of mitochondrial double-stranded DNA ( K eq = 0.01 × 10 6 M −1 ). The probe also showed high sensitivity (LOD = 1.52 nM) and good linear relationship (R 2 = 0.9983) with the mitochondrial G4-DNA. The delivery of BYM to mitochondria is not mitochondrial membrane potential dependent but mainly through the permeability transition pore on the mitochondrial inner membrane. In addition, BYM exhibits low cytotoxicity against a number of human cancer and noncancerous cells, indicating that BYM could be a good ligand for bioorthogonal study in live cells by targeting the mitochondrial G4-DNA structures. In the present study, BYM was demonstrated in monitoring the dynamic process of mitochondrial autophagy. The small-sized fluorescent probe possessing high photostability, selectivity and sensitivity targeting mitochondrial G-quadruplexes may able to provide a useful chemical tool for real-time study of mitochondrial functions in live cells.
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高影响因子
FUEL
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2022
·
IF 8.035
Yi Liu,Ying Chen,Shuang Ma,Xianlong Liu,Xiangwen Zhang,Ji-Jun Zou,Lun Pan
High-energy–density (HED) fuels have attracted extensive attention for volume-fixed aerospace vehicles because they can provide more propulsion energy to increase the payload and range of aerospace vehicles. Herein, we report a route for synthesis of HED fuel, pentacyclo[8.2.1.1 4,7 .0 2,9 .0 3,8 ]tetradecane (PCTD) with strained structure, by photoinduced intermolecular [2 + 2] cycloaddition of norbornene (NBE). The triplet quenching and phosphorescence quenching results indicate that NBE cycloaddition is conducted through the photosensitized processes containing triplet–triplet energy transfer, cyclization and relaxation. The reaction conditions are optimized to obtain the high photocatalytic activity, with the NBE conversion and PCTD selectivity reaching 78.7% and 94.4%, respectively. Moreover, a kinetic model is proposed with the reaction rate equation being correlated with the incident light flux, with the pseudo reaction kinetics parameters and reaction rate equations obtained. Importantly, PCTD shows high density of 1.024 g/mL and high volumetric net heat of combustion of 42.98 MJ/L, much higher than those of JP-10. In addition, blending with JP-10 or QC can significantly improve cryogenic properties of blended fuels, which is very promising for the practical application.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 6
·3017-3025
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IF 3.925
Wen-Feng Wang,Li-Qi Qiu,Kai-Hong Chen,Hong-Ru Li,Lie-Feng Feng,Liang-Nian He
Photocatalytic CO2 reduction to valuable chemicals, especially fuels, is considered as a promising strategy to mitigate CO2 accumulation and tackle the energy crisis, among which photocatalysis is vital to achieve efficient and selective reduction of CO2. In this work, phosphorus-doped hollow polygonal g-C3N4 rods were prepared through phosphoric acid assisted self-assembly under hydrothermal conditions and subsequent thermal polymerization using phosphoric acid as the phosphorus source and melamine as the nitrogen-rich precursor. The resulting phosphorus-doped hollow polygonal g-C3N4 rods feature increased specific surface area, visible light absorption and photogenerated carrier separation and transfer efficiency according to the structure and photoelectric properties characterization. Coupled with an earth abundant metal-based complex, i.e. [Co(bpy)3]Cl2, as a co-catalyst, the phosphorus-doped hollow polygonal g-C3N4 rods deliver a CO evolution rate of up to 447.5 μmol g−1 h−1 with a selectivity of ca. 96%, being much higher compared to the pristine g-C3N4 (67.01 μmol g−1 h−1 with a selectivity of ca. 94%) resulting from the improved light harvesting and charge transfer to the co-catalyst. Remarkably, the phosphorus-doped hollow polygonal g-C3N4 rods can be reused 6 times while retaining constant catalytic activity in the photoreduction reaction. This work presents new insights into photocatalytic CO2 reduction by developing non-metal doping and hollow structural designs for semiconductor photocatalysts.
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高影响因子
Journal of Environmental Sciences
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2022
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IF 6.796
Fuyou Du,Zhan Lai,Huiyang Tang,Haiyan Wang,Chenxi Zhao
In this work, a novel dual Z-scheme Bi 2 WO 6 /g-C 3 N 4 /black phosphorus quantum dots (Bi 2 WO 6 /g-C 3 N 4 /BPQDs) composites were fabricated and utilized towards photocatalytic degradation of bisphenol A (BPA) under visible-light irradiation. Optimizing the content of g-C 3 N 4 and BPQDs in Bi 2 WO 6 /g-C 3 N 4 /BPQDs composites to a suitable mass ratio can enhance the visible-light harvesting capacity and increase the charge separation efficiency and the transfer rate of excited-state electrons and holes, resulting in much higher photocatalytic activity for BPA degradation (95.6%, at 20 mg/L in 120 min) than that of Bi 2 WO 6 (63.7%), g-C 3 N 4 (25.0%), BPQDs (8.5%), and Bi 2 WO 6 /g-C 3 N 4 (79.6%), respectively. Radical trapping experiments indicated that photogenerated holes (h + ) and superoxide radicals (•O 2 − ) played crucial roles in photocatalytic BPA degradation. Further, the possible degradation pathway and photocatalytic mechanism was proposed by analyzing the BPA intermediates. This work also demonstrated that the Bi 2 WO 6 /g-C 3 N 4 /BPQDs as effective photocatalysts was stable and have promising potential to remove environmental contaminants from real water samples.
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PubMed
高影响因子
CARBON
·
2022
·
IF 11.307
Yuanyuan Shao,Jundie Hu,Tingyu Yang,Xiaogang Yang,Jiafu Qu,Qi Xu,Chang Ming Li
Hydrogen peroxide (H 2 O 2 ) is an important green oxidant for environmental remediation. It is a sustainable strategy to realize solar-driven in- situ H 2 O 2 production for timely using via cascade reactions to sterilization or remove organic pollutants etc. However, how to improve the H 2 O 2 production and consumption abilities of catalysts are the two main challenges. Here we report a superior carbon-related ZnIn 2 S 4 /g-C 3 N 4 catalyst with excellent H 2 O 2 generation and consumption capabilities for efficient sterilization under visible light irradiation. The 2D/2D heterojunction of ZnIn 2 S 4 /g-C 3 N 4 with rapid carrier separation and transfer efficiency exhibits a remarkable H 2 O 2 yield of 4.27 mmol g −1 , which is much higher than that of current catalysts. The in- situ produced H 2 O 2 can be quickly activated to strong oxidizing hydroxyl radicals for sterilization, in which the Escherichia coli ( E. coli ) are fully cleared only within 25 min and 98% of Staphylococcus aureus ( S. aureus ) are killed out after 60 min irradiation. The prepared photocatalysts realize the rapid production and consumption of H 2 O 2 , and this work provides an effect green strategy for sterilization via the in- situ generated H 2 O 2 .
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高影响因子
NANO
·
2022
·
IF 1.438
Kaiyue Liang,Mingcai Yin,Yixian Li,Yaoting Fan,Zhongjun Li
CdS and MoS 2 are both promising photocatalytic materials for hydrogen production and lots of MoS 2 /CdS composites have been investigated. However, most of the previous work focused on relatively stable hexagonal CdS; researches on cubic CdS are still rare mainly due to its unstability. Then in this paper, a ternary composite MoS 2 /CN/CdS composed of cubic CdS, MoS 2 and graphitic carbon nitride (g-C 3 N 4 , abbreviated as CN) was prepared by simple in situ precipitation of cubic CdS on MoS 2 /CN at room temperature. Based on a series of characterizations, the photocatalytic hydrogen production performance of MoS 2 /CN/CdS was studied. The results showed that when the amount of MoS 2 /CN was 10 wt.%, the activity reached 1253.2 μ mol h − 1 , about 110 times that of pure CdS. Especially, its stability was investigated in detail by cyclic hydrogen production tests, which indicated that although the activity decreased after the first cycle, it was stable in the following three cycles mainly due to the existence of CN. Namely, a relatively stable and high performance cubic CdS-based ternary composite was achieved. This research can provide some new insights into the design of cubic CdS-based photocatalysts.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
·
IF 8.025
Zhongyue Chen,Yuanfeng Pan,Pingxiong Cai
The effective removal of toxic dyes from aqueous solution is of great significance for environmental protection. Herein, an eco-friendly sugarcane cellulose (SBC)/sodium carboxymethylcellulose (CMC-Na) adsorbent reinforced with carbon nitride (g-C 3 N 4 ) was successfully prepared via a facile sol-gel method. The resulting gel-like adsorbent or composite hydrogel was comprehensively characterized with FTIR, SEM, EDS , TGA analysis. The adsorption behaviors of the adsorbent in the removal of methylene blue (MB) were systematically investigated. Results showed the pseudo-second-order kinetic model and Langmuir model described adsorption process accurately with the maximum adsorption capacity of 362.3 mg g −1 , indicating that adsorption behavior is a monolayer chemical adsorption. Moreover, the composited hydrogel displayed excellent adsorption selectivity on MB/MO or MB/RhB mixed dyes. In addition, adsorbent showed great stability and reusability with almost no loss in adsorption capacity after 7 cycles. Due to the facile preparation process and outstanding mechanical properties, as well as high recyclability, g-C 3 N 4 @SBC/CMC has great potential in wastewater treatment.
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PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Jiaxin Xu,Xiuquan Lan,Jianhua Cheng,Xinhui Zhou
Water pollution , deriving from the contamination of pathogenic bacteria, has posed a threat to human's survival and development. Photocatalytic disinfection is being widely studied in decentralized drink water safety, as traditional disinfection technologies are limited by harmful disinfection by-product and excessive energy consumption. Herein, a novel composite membrane (PN/Ag) with plasmonic heterojunction was synthesized for the efficient photocatalytic disinfection through the combination of polyacrylonitrile (PAN), N -doped carbon dots (NCDs)/g-C 3 N 4 and Ag 2 C 2 O 4 by electrospinning technique and successive ionic layer adsorption and reaction (SILAR) process. The surface plasmon resonance (SPR) effect of Ag nanoparticles and Schottky barrier formation between metal and semiconductor contributed to the efficient separation of electron-hole pairs and the generation of reactive species, resulting in outstanding photocatalytic disinfection of PN/Ag composite membranes (7.48 and 7.70 log inactivation of E. coli and S. aureus respectively in 80 min) and good reusability under visible light illumination. Moreover, the potential Z-scheme photocatalytic mechanisms were proposed for PN/Ag system according to the band structure and reactive species analysis. The as-proposed PN/Ag composite membranes may shed light on the design and application of materials in water purification .
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高影响因子
危险品化学品经营许可证（带存储）