JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Junyuan Zhang,Ziwei Deng,Shuli Bai,Changyu Liu,Mengchen Zhang,Chao Peng,Xiaolong Xu,Jianbo Jia,Tiangang Luan
In this work, potassium acetate (KAc) was added during the synthesis of a Zn-Fe based metal-organic framework (Fe-ZIF-8) to increase the fixed amount of Fe while simultaneously enhancing the number of pores. Electrospinning was utilized to embed KAc-modified Fe-ZIF-8 (Fe-ZIF-8-Ac) into the polyacrylonitrile nanofiber mesh, to obtain a network composite (Fe@NC-Ac) with hierarchical porous structure. Fe@NC-Ac was co-pyrolyzed with thiourea , resulting in Fe, N, S co-doped carbon electrocatalyst . The electrochemical tests indicated that the prepared catalyst displayed relatively remarkable oxygen reduction reaction (ORR) catalytic activity, with an onset potential (E onset ) of 1.08 V (vs. reversible hydrogen electrode, RHE) and a half-wave potential (E 1/2 ) of 0.94 V, both higher than those of the commercial Pt/C (E onset = 0.95 V and E 1/2 = 0.84 V), respectively. Assembled into Zn-air batteries, the optimized catalyst exhibited higher open circuit voltage (1.698 V) and peak power density (90 mW cm −2 ) than those of the commercial 20 wt% Pt/C (1.402 V and 80 mW cm −2 ), respectively. This work provided a straightforward manufacturing strategy for the design of hierarchical porous carbon-based ORR catalysts with desirable performance.
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Science China-Materials
·
2023
·Vol. 66
·期 9
·3415-3423
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IF 8.1
Gao Jinxiang,Che Bo,Cai Huiling,Xiao Peng,Zhang Lijian,Cai Zhiyuan,Zhu Changfei,Tang Rongfeng,Chen Tao
Antimony selenosulfide (Sb 2 (S,Se) 3 ) is a promising photovoltaic material because of its high chemical stability, optimal optoelectronic properties, and low-cost advantages. However, finding suitable material processing approaches to obtain elemental controlled Sb 2 (S,Se) 3 films with suppressed deep-level defects poses fundamental demands and challenges to developing this emerging solar technology. Here, we developed a robust method for tailoring the composition of the film through controlling the anion elements. The films were prepared by evaporating the presintered Sb 2 (S,Se) 3 alloy compound via a single-source thermal evaporation process. A quasi-precise estimate of single-phase Sb 2 (S,Se) 3 films was made by sintering Sb, S, and Se elemental precursors and adjusting the anion molar ratio in the prefabricated Sb 2 (S,Se) 3 alloy compound, and the elemental ratio of the precursor alloy compound was maintained in the as-obtained Sb 2 (S,Se) 3 films. A highly efficient Sb 2 (S,Se) 3 solar cell with a power conversion efficiency of 8.25% was achieved by introducing low-cost CuPc-doped P3HT as a hole-transporting layer. Here, we demonstrate the dependence of deep-level defects and oriented crystal growth on the S/Se atomic ratios and show how tunability can be used to improve carrier transport for photovoltaic energy conversion. Our study presents a novel approach to fabricating metal chalcogenide semiconducting films and improving the performance of Sb 2 (S,Se) 3 solar cells.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10537-10544
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IF 4
Guirong Huang,Qiushi Huang,Zhe Cui,Jinqi Zhu,Mengluan Gao,Wenqing Wang,Fuming Weng,Qian Liu,Rujia Zou
Bismuth (Bi) has emerged as a promising candidate for sodium-ion battery anodes because of its unique layered crystal structure, superior volumetric capacity, and high theoretical gravimetric capacity. However, the large volume expansion and severe aggregation of Bi during the alloying/dealloying reactions are extremely detrimental to cycling stability, which seriously hinders its practical application. To overcome these issues, we propose an effective synthesis of composite materials, encapsulating Bi nanoparticles in N,S co-doped carbon nanoribbons and composites with carbon nanotubes (N,S-C@Bi/CNT), using Bi2S3 nanobelts as templates. The uniform distribution of Bi nanoparticles and the structure of carbon nanoribbons can reduce the diffusion path of ions/electrons, efficiently buffer the large volume change and prevent Bi from aggregating during cycles. As expected, the N,S-C@Bi/CNT electrode shows superior sodium storage performance in half cells, including a high specific capacity (345.3 mA h g−1 at 1.0 A g−1), long cycling stability (1000 cycles), and superior rate capability (336.0 mA h g−1 at 10.0 A g−1).
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EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Hongjian Gu,Cheng Liu,Qian Liu,Yu Zhang,Meng Wang,Xi Chen,Yousi Chen,Jinyan Wang,Xigao Jian
A series of poly(bisphthalazinone ether sulfone ketone)s with pendant phenyl groups (POPESKs) were synthesized via aromatic nucleophilic substitution polycondensation. The thermal degradation mechanism of POPESKs was determined investigated by TG-FTIR. The T g s of POPESKs range from 296 to 326 °C and the storage modulus retention is up to 46.1 % at 290 °C. POPESKs have good solubility in dichloroethane, chloroform, tetrachloroethane, N -methyl-2-pyrrolidone and pyridine, and exhibit good film-forming property. The tensile strength, tensile modulus, and tensile elongation of POPESK films are 85–96 MPa, 1.34–1.86 GPa, and 8.9–11.6 %, respectively. Meanwhile, the polymer films exhibit the high light transmittance of up to 83 % at 800 nm and its water contact angle are in the range of 82.3–94.3°. Its superior overall performance shows great potential in aerospace, petrochemical and energy applications.
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Biomaterials Science
·
2023
·
IF 6.6
Qinghua Cao,Xiang Xiao,Chengcheng Tao,Rui Shi,Rui Lv,Ruochen Guo,Xinyi Li,Baiyan Sui,Xin Liu,Jian Liu
As a key pathogen of periodontitis, P. gingivalis requires support of the initial colonizing bacterium (S. gordonii preferably) to form symbiotic biofilms on gingival tissues with enhanced antibiotic resistance. Here, we report a new strategy to treat periodontitis biofilms with S. gordonii membrane-coated H2O2 self-supplied nanocomposites (ZnO2/Fe3O4@MV NPs) in a “Jenga” style. Integration of our special MV coatings enables selectively enhanced internalization of the cargos in S. gordonii, thus inducing severe damage to the foundational bacterial layer and collapse/clearance of symbiotic biofilms consequently. This strategy allows us to clear the symbiotic biofilms of S. gordonii and P. gingivalis with active hydroxyl radicals (˙OH) derived from ZnO2–Fe3O4@MV NPs in a H2O2 self-supplied, nanocatalyst-assisted manner. This “Jenga-style” treatment provides a cutting-edge proof of concept for the removal of otherwise robust symbiotic biofilms of periodontitis where the critical pathogens are difficult to target and have antibiotic resistance.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiani Lu,Yinan Wang,Hongda Li,Wei Hu,Guowei Zhou,Bin Sun,Shaonan Gu
Amorphous α-CoS, which has abundant unsaturated active sites, was used to construct Bi 2 MoS x O 6-x /α-CoS crystalline/amorphous S-scheme heterojunction on the crystalline surface of Bi 2 MoS x O 6-x to decompose amoxicillin. Amorphous surface adsorbed amoxicillin and activated it through elongating C−N and C=O bonds. Meanwhile, using S to partial substitute O in the MoO 6 octahedron to tune the band structure of Bi 2 MoS x O 6-x for increasing the visible-light utilization and optimizing the redox capability. Accordingly, the visible light absorbance range was extended to 735 nm with outstanding photo-electronic capabilities. The degradation rate catalyzed by Bi 2 MoS x O 6-x /α-CoS was promoted by two orders of magnitude, much higher than that of most of the reported photocatalysts. Furthermore, LC−MS/MS was employed to precisely track the amoxicillin degradation pathways. It was discovered that by attacking the reactive atoms of S7, N13, O21, C23, and O24 in amoxicillin, free radicals generated a series of intermediates with no apparent toxicity assessed by ecological structural activity relationships.
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Nanoscale
·
2023
·
IF 6.7
miaomiao yuan,Rongjun Zhang,Shuxiang Xu,Lihao Guo,Luoyijun Xie,Yingying Liao,Yang Xu,Xuemei Fu
Photothermal therapy (PTT) is an emerging field, and the photothermal agents could convert visible or near-infrared (NIR) radiation into heat to kill tumor cells. However, the low photothermal conversion efficiency of photothermal agents and their limited antitumor activities delay the development of these agents into monotherapies for cancer. Herein, we have fabricated an ultrasmall polyvinylpyrrolidone (PVP)-Fe-Cu-Ni-S (PVP-NP) nano-agent via a simple hot injection method with an excellent photothermal conversion efficiency (~96%). Photothermal therapy with this nano-agent effectively inhibits tumor growth without apparent toxic side effects. Mechanistically, our results demonstrated that, after NIR irradiation, PVP-NPs can induce ROS/singlet oxygen generation, decrease mitochondrial membrane potential, and release extracellular Fe2+ and consume glutathione, triggering autophagy and ferroptosis of cancer cells. Moreover, PVP-NPs exhibit excellent contrast enhancement according to magnetic resonance imaging (MRI) analysis. In summary, PVP-NPs have a high photothermal conversion efficiency and can be applied for MRI-guided synergistic photothermal/photodynamic/chemo-dynamic cancer therapy, solving the bottleneck of existing phototherapeutic agents.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yong Guo,Xudong Miao,Xueyang Zhang,Huinan Che,Ying Li
The development of novel metal-free catalysts to photosynthesize hydrogen peroxide (H 2 O 2 ) is recognized as a prospective technology for sustainable energy conversion. Herein, the carbon-doped boron nitride (BCN) and perylene tetracarboxylic dianhydride (PTCDA) formed PDA@BCN S-scheme heterojunctions with π-π stacking, which catalyzed the production of H 2 O 2 at an unexpectedly high yield of 285.47 μmol h −1 g −1 in air. The high photocatalytic performance is attributed to the enhanced light absorption resulting in abundant carrier excitation, rapid charge separation driven by S-scheme heterojunctions, and highly selective H 2 O 2 formation pathway. Theoretical calculations demonstrate that carbon sites in PDA@BCN can serve as an advanced active center for oxygen enrichment and activation, promoting oxygen reduction and efficient photocatalytic production of H 2 O 2 . This work lays the foundation for the design of efficient, stable, and reusable photocatalysts for environmental restoration and energy conversion.
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WATER RESEARCH
·
2023
·
IF 12.8
Huimin Liu,Dejin Liu,Yuancai Chen
Considering the negligent degradation of sulfamethoxazole (SMX) by Citrobacter freundii JH , the incorporation of bio-FeS could initiate the SMX biodegradation to 0.0444 (S-FeS), and further to 0.0564 mg L −1 mg −1 protein d −1 (SN-FeS) when coexisted with nitrate. Electrochemical (LSV, I-t , DPV, EIS and EDC) and respiratory inhibition experiments clarified that the bio-FeS could greatly switch/redistribute electron transmembrane-transfer from intracellular to extracellular mainly via FDH/Hases-S-chain, as revealed by the significant increase of ipa- FDH/Hases / ipa- FC-Cyts and ipc- FDH/Hases / ipc- FC-Cyts (from 1.09 and 1.07 (SN-native) to 1.50 and 3.58 (SN-FeS)), while nitrate (linear fitting with NADH ( R 2 = 0.9903)) mainly intensified CoQ-L-chain related INET from Complex I to CoQ to compensate for the electronic competition with SMX. SN-FeS system detoxified the SMX on microbial metabolism (such as membrane rupture and oxidative stress induction) with high SOD activity (737.93 U g FW −1 ). Structural equation modeling indicated that bio-FeS up-regulated PMF-mediated ATP synthesis ( P PMF-ATPs from 0.12 (SN-native) to 0.74 (SN-FeS)) and PMF-mediated NADH ( P PMF-NADH from -0.72 (SN-native) to 0.63 (SN-FeS)), and the nitrate addition intensified this positive feedback. Overall, this study provides a new perspective for bionanoparticles via electron transfer/redistribution to detoxify and launch the antibiotics biodegradation in ecological environment.
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MODERN PHYSICS LETTERS B
·
2023
·
IF 1.9
Yaqi Chen,Xin Fan,Shan Gao,Wenting Ji,Xinjian Li,Yuewen Zhang,Hongan Ma,Xiaopeng Jia
Electronegative S-filled skutterudite compounds have attracted considerable attention due to scattering of low-frequency phonons (35–50 cm − 1 ), but there are few reports on S-filled double-substituted skutterudite. In this work, a series of S-filled Te-Sn double-substituted skutterudite compounds were synthesized using high pressure and high temperature (HPHT) method. The phase composition, microstructure, and thermoelectric properties of S x Co 4 Sb 1 1 Te 0 . 7 Sn 0 . 3 ( x = 0 , 0.05, 0.10, 0.20) samples were systematically determined. The results show that the introduction of S increases the substitution limit of Te in the Sb site. Under the combined effect of the sample synthesis pressure and S filling, the nucleation density of the sample grains increases and the grain size decreases. At the same time, there are numerous special microstructures in the samples synthesized in a high-pressure environment. Thermoelectric performance studies show that a small amount of S filling optimizes the Seebeck coefficient of the sample and increases the power factor (PF). With an increase of the amount of S introduced, the thermal conductivity of the samples decreases significantly. Therefore, the maximum zT value of an S 0 . 0 5 Co 4 Sb 1 1 Te 0 . 7 Sn 0 . 3 sample synthesized at 2.5 GPa pressure is 0.17 at room temperature. The maximum zT value of the sample is 1.26 at 773 K.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Duanlian Tang,Minlei Yin,Xiaowei Du,Yuxin Duan,Jie Chen,Ting Qiu
Conjugated microporous poly(aniline)s (CMPAs) are an intriguing material platform for the selective capture of toxic heavy metal ions from water. However, the hydrophobic, monotonous N heteroatom and microporous properties limit their application scopes, particularly for the in-depth treatment requiring to a parts per billion (ppb) level. Herein, we report a novel chitosan-anchored CMPA (CMPA-CS), as designed through delicately exploiting the chitosan as either adsorption sites or pore templates for CMPA to acquire highly functionalized mesopores that could considerably facilitate Hg(II) adsorption. The CMPA-CS thus displayed excellently wide pH suitability (1.0–13.0), large capacity (862.1 mg g −1 ), ultrafast removal rate ( k 2 = 0.163 mg g −1 min −1 ), high affinity ( K d = 7.1 × 10 6 ), and strong anti-interference performance (selectivity of minimum 94.5% under the extreme influence of 100-fold-concentration cations). Besides, the Hg(II) concentration could be decreased from 0.578 ppm to less than 1.106 ppb in Minjiang river water substrates, below the EPR drinking water standards of 2 ppb. Comprehensive characterization revealed that the removal mechanism of Hg (II) was primarily a synergetic chelation reaction from the unique nitrogen ligands and O-containing groups, with the following features intensified: (i) good wettability to increase the interaction between CMPA and Hg(II) as contributed by the plentiful oxygen-containing groups; (ii) hierarchical mesopores that would promote ions transport efficiency as created by the chitosan. The new insight in this work can offer valuable guidelines for the design and structure optimization of CMPAs, facilitating its real-world commercial implementation.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Mengke Li,Gaojie Yan,Peng Zou,Haifeng Ji,Han Wang,Zongjie Hu,Zhipeng Yang,Yi Feng,Haijie Ben,Xiaojie Zhang
First, a new covalent organic framework (HUT9) with disulfide bonds have been synthesized, which can be grown in situ on carbon nanotubes (CNT) as separator modification material for Li–S batteries. Experiments and DFT showed that disulfide bond could effectively capture soluble polysulfides (LiPSs) during discharge process, while promoting the conversion of LiPSs to Li2S/Li2S2 and improve the utilization rate of sulfur. The polar groups of the covalent organic framework provide chemisorption, and an interwoven network of HUT9@CNT (physical constraints) cooperates to inhibit the transport of LiPSs. The modified battery has a capacity retention rate of 83% (decay rate of 0.032% per cycle) after 500 cycles at 1 C. Specifically, the battery with 2-HUT9@CNT modified separators (sulfur loading: 4 mg cm–2, sulfur content: 80%, electrolyte/sulfur ratio: 10 mL g–1) can reach 3.4 mAh cm–2 area capacity after 50 cycles. This work enriched the COF material system and provided guidance for the application of organic materials in an energy storage system.
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