APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Ya-Wen Zeng,De-Kun Ma,Wei Wang,Jing-Jing Chen,Lin Zhou,Yi-Zhou Zheng,Kang Yu,Shao-Ming Huang
For practical application, it is highly desirable to obtain carbon dots (CDs) through environmentally benign synthetic route, using green raw materials. On the other hand, at present, most of CDs reported in the literature showed blue, green and yellow emission. Therefore it is still necessary to develop new strategy to obtain CDs with longer wavelength emission in order to expand their application range. Toward this end, in this study, N, S co-doped CDs were synthesized through one-pot condensation polymerization and carbonization reactions under hydrothermal conditions, using two different amino acids as raw materials. Taking the reaction of l -serine with l -cystine as an example, the as-obtained products were characterized by various techniques such as transmission electron microscopy, elemental analysis, Fourier-transform infrared spectrum, X-ray photoelectron spectra, and so on. Interestingly, N, S co-doped CDs displayed unique orange emission at room temperature. The possible photoluminescence mechanism of N, S co-doped CDs was proposed. Furthermore, the as-synthesized N, S co-doped CDs were directly applied in the imaging of peritoneal macrophages of mice.
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高影响因子
Processes
·
2025
·Vol. 13
·期 11
·3652
·
IF 2.8
Kai Li,Rongguo Sun
Mercury (Hg) contamination in water and soil poses severe ecological and human health risks, yet conventional sorbents often suffer from limited capacity, selectivity, and stability. Here, we report a bifunctional porous organic polymer (AMTD-TCT) rationally constructed by covalently crosslinking 2-amino-5-mercapto-1,3,4-thiadiazole with trichlorotriazine, thereby integrating abundant sulfur and nitrogen coordination sites within a stable mesoporous framework. AMTD-TCT exhibits an ultrahigh Hg(II) adsorption capacity of 1257.7 mg g−1, far exceeding most reported porous sorbents. Adsorption follows monolayer chemisorption, governed by strong S–Hg and N–Hg coordination and Na+/Hg2+ion exchange, while hierarchical porosity ensures rapid diffusion and efficient utilization of active sites. The polymer maintains robust performance over a wide pH range and demonstrates strong retention with minimal desorption, underscoring its environmental durability. These findings highlight AMTD-TCT as a highly effective and scalable platform for Hg(II) remediation in complex aqueous–soil systems and illustrate a generalizable molecular design strategy for developing multifunctional porous polymers in advanced separation and purification technologies.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haoqiang Zhang,Fuying Zhu,Tao Song,Yisong Ju,Congzhong Yang,Tianshu Zhang,Jiang Du,Liang Shi,Qiuling Yue,Hui Wei,Xiaozhi Zhao
Serotonin (5-hydroxytryptamine, 5-HT) is a crucial neurotransmitter, the abnormal levels of which are closely associated with various neuropsychiatric disorders and male reproductive dysfunctions. In this study, a sulfur-doped Fe–N–C single-atom nanozyme (S@Fe-CNx) was successfully synthesized, and its oxidase-like activity and catalytic mechanism were systematically investigated. The experimental results indicate that sulfur doping significantly enhanced Fe-CNx oxygen activation capacity and catalytic kinetics by effectively optimizing the electronic structure of the FeNx active centers. Leveraging its superior oxidase-like activity, we developed a H2O2-free colorimetric sensing method for the highly sensitive and selective detection of 5-HT. The method exhibited a good linear relationship between absorbance and 5-HT concentration in the range of 40 ng/mL to 10 μg/mL, achieving a low limit of detection of 6.0 ng/mL. The successful application of this method for detecting 5-HT in human serum samples demonstrates its great potential for practical use. Furthermore, we established a smartphone-based colorimetric detection platform that quantified 5-HT by correlating its concentration with the grayscale intensity of standard solution images captured by a smartphone. This approach provides a facile strategy for developing point-of-care testing platforms.
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DOI
PubMed
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2023
·
IF 10.9
Kexin Dong,Chuqi Shen,Ruyu Yan,Yanping Liu,Chunqiang Zhuang,Shijie Li
The escalating presence of pharmaceutical antibiotics in natural water poses an overwhelming threat to the sustainable development of society. Photocatalysis technology stands out as a promising and cutting-edge environmental purification alternative. C 3 N 5 , identified as a distinctive nonprecious nonmetal photocatalyst, holds potential for environmental protection. However, challenges persist originating from the sluggish photoreaction kinetics and severe photo-carrier reunion. Currently, the design of a special S-scheme photosystem proves to be a reliable strategy for obtaining outstanding photocatalysts. In this context, a plasmonic S-scheme photosystem involving Ag/Ag 3 PO 4 /C 3 N 5 was developed through a feasible route. The compactly connected 0D/0D/2D Ag/Ag 3 PO 4 /C 3 N 5 heterostructure, benefitting from the synergy between the plasmonic effect and the S-scheme junction, facilitates the efficient utilization of appreciably reinforced sunlight absorption, effective photo-carrier disassociation, and notable photoredox capacity. Consequently, this system generates •OH and
⋅ O 2 - effectively. Ag/Ag 3 PO 4 /C 3 N 5 demonstrates a superb photocatalytic levofloxacin eradication rate of 0.0362 min −1 , marking a substantial advancement of 24.8, 1.1, and 0.7 folds compared to C 3 N 5 , Ag 3 PO 4 , and Ag 3 PO 4 /C 3 N 5 , respectively. Impressively, Ag/Ag 3 PO 4 /C 3 N 5 delivers remarkable anti-interference performance and reusability. This achievement signifies a significant step toward developing potent C 3 N 5 -involved photosystems for environmental purification. Download: Download high-res image (106KB) Download: Download full-size image
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Shengqian Liang,Min Ma,Zheng Zheng,Jiahang Song,Yijian Zhou,Enzhou Liu,Haixia Ma,Bing Wang,Bo Zhou,Yan Nie,Zhuo Li
For the efficient harnessing of solar energy and mitigation of environmental pollution, the development and application of semiconductor photocatalysis technology is paramount. Herein, a novel SubPc-Br/CdS supramolecular array with an S-scheme heterojunction was synthesized through the intermolecular π-stacked self-assembly of subphthalocyanine (SubPc-Br) and nanometer cadmium sulfide (CdS). This self-assembly system features a highly structured architecture and excellent stability. Experiments and ground-state differential charge calculations demonstrate that SubPc-Br and CdS form a built-in electric field during the self-assembly process, a critical factor in promoting the dissociation of electrons and holes. Additionally, this study utilized time-dependent density functional theory (TDDFT) to simulate the dynamic adsorption behavior of excited oxygen molecules on the SubPc-Br/CdS interface for the first time. The analysis of molecular charge differential density under different excited states proved that the addition of SubPc-Br molecules not only improves the photocorrosion resistance of CdS in an O 2 adsorption environment but also enhances the production of advanced reactive oxygen species under the synergistic action of h + and ·O 2 – . When subjected to visible light, the degradation efficiency of minocycline (MC) achieved 96.8 % within 60 min and maintained 80.3 % after 5 cycles. In summary, this study highlights the feasibility of creating advanced S-scheme heterojunction photocatalysts through the strategic incorporation of organic supramolecules with semiconductor catalysts.
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高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Ji Wu,Ke Cao,Cai-Yan Zhang,Tao-Tao Xu,Xin-Yu Wen,Bo Li,Junxiao Yang
A palladium catalyzed selective B(3)–H activation/oxidative dehydrogenative coupling for the synthesis of bis(o-carborane)s connected with B(3)–B(3′) and B(3)–B(6′) bonds has been developed for the first time. A plausible mechanism involving stepwise activation of B(3)–H and B(3′/6′)–H bonds by PdII and PdIV was proposed. This work is the first example and the most efficient protocol for synthesis of bis(o-carborane)s connected with B(3)–B(3′) and B(3)–B(6′) bonds, which has important reference for design, synthesis, and application of bis(o-carborane)s in related fields.
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高影响因子
International Journal of Extreme Manufacturing
·
2022
·Vol. 5
·期 1
·015502
·
IF 10.036
Zhibin Jiang,Lujie Jin,Xiying Jian,Jinxia Huang,Hongshuai Wang,Binhong Wu,Kang Wang,Ling Chen,Youyong Li,Xiang Liu,Weishan Li
Lithium-sulfur (Li-S) batteries can provide far higher energy density than currently commercialized lithium ion batteries, but challenges remain before it they are used in practice. One of the challenges is the shuttle effect that originates from soluble intermediates, like lithium polysulfides. To address this issue, we report a novel laminar composite, N,O-carboxymethyl chitosan-reduced graphene oxide (CC-rGO), which is manufactured via the self-assembly of CC onto GO and subsequent reduction of GO under an extreme condition of 1 Pa and −50 °C. The synthesized laminar CC-rGO composite is mixed with acetylene black (AB) and coated on a commercial polypropylene (PP) membrane, resulting in a separator (CC-rGO/AB/PP) that can not only completely suppress the polysulfides penetration, but also can accelerate the lithium ion transportation, providing a Li-S battery with excellent cyclic stability and rate capability. As confirmed by theoretic simulations, this unique feature of CC-rGO is attributed to its strong repulsive interaction to polysulfide anions and its benefit for fast lithium ion transportation through the paths paved by the heteroatoms in CC.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zewen Yang,Dandan Jia,Yue Wu,Depeng Song,Xiaolin Sun,Cheng Wang,Li Yang,Yuan Zhang,Jing Gao,Takeo Ohsaka,Futoshi Matsumoto,Jianfei Wu,Qiang Shen
Lithium-sulfur (Li-S) batteries exhibit a high specific capacity (1675 mAh g −1 ) but poor S conductivity and severe shuttle effects. Selenium (Se) can greatly mitigate these disadvantages, but its theoretical capacity is relatively low (675 mAh g −1 ). A series of S x -Se y compounds supported by chitosan-derived carbon with intertwined carbon nanotube (CC + CNT) carriers exhibit the high capacity of S, the stability of Se, and the excellent conductivity of C, complementing their individual defects. S 2 Se 1 /CC + CNT shows the best electrochemical performance (833.2 mAh g −1 after 500 cycles). Characterization results reveal the structure–activity relationships and complex reaction mechanisms of the prepared electrode materials. The overall reactions are a combination of basic Li-S and Li-Se reactions. The discharge steps are clearly identifiable, while the reaction sequences are slightly adjusted and fully integrated when charging. This work provides a foundation for future research and for the practical application of chalcogenides in lithium-metal batteries.
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高影响因子
POLYMER
·
2022
·
IF 4.432
Jie Huan,Jing Li,Yinjia Lan,Sheng Wang,Xiaohong Li,Xiaoming Yang,Huanjun Lu,Yingfeng Tu
We present here the effect of oligo(ethylene glycol) (OEG) segmental length on properties of cyclic oligo(oligoethylene glycol terephthalate)s (COEGTs) and their corresponding polymer counterparts, poly(oligoethylene glycol terephthalate)s (POEGTs). COEGT monomers were synthesized from terephthaloyl chloride with corresponding diethylene glycol , triethylene glycol , and tetraethylene glycol under pseudo-high-dilution conditions. As those large ring cyclic monomers are hard to be polymerized via traditional ring-opening polymerization, a cascade polycondensation-coupling ring-opening polymerization method is utilized to obtain high molecular weight POEGTs. The cascade polymerization mechanism is confirmed by the kinetics study . The structures of COEGTs and POEGTs were well characterized and their properties were studied to reveal the structure-property relationship. With the increment of OEG length in repeating units, the chain flexibility of POEGT and COEGTs is enhanced. As a result, the melting temperatures of COEGTs and glass transition temperatures of POEGTs decrease. On the other hand, the thermal degradation temperature of POEGTs and COEGTs increases due to the enhanced ether fraction and reduced ring strain. Solid-state polymer electrolytes based on POEGTs was prepared by blending with lithium bis(trifluoromethanesulfonyl)imide. The measured ionic conductivity increased with the OEG length in POEGT repeating units. Our results revealed the effect of OEG length on the structure-property relationship in cyclic oligo(ether ester)s and copoly(ether ester)s, providing a facile way to tune their properties.
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高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-7
·
IF 16.6
Li Peihui,Hou Songjun,Wu Qingqing,Chen Yijian,Wang Boyu,Ren Haiyang,Wang Jinying,Zhai Zhaoyi,Yu Zhongbo,Lambert Colin J.,Jia Chuancheng,Guo Xuefeng
The transformation from one compound to another involves the breaking and formation of chemical bonds at the single-bond level, especially during catalytic reactions that are of great significance in broad fields such as energy conversion, environmental science, life science and chemical synthesis. The study of the reaction process at the single-bond limit is the key to understanding the catalytic reaction mechanism and further rationally designing catalysts. Here, we develop a method to monitor the catalytic process from the perspective of the single-bond energy using high-resolution scanning tunneling microscopy single-molecule junctions. Experimental and theoretical studies consistently reveal that the attack of a halogen atom on an Au atom can reduce the breaking energy of Au−S bonds, thereby accelerating the bond cleavage reaction and shortening the plateau length during the single-molecule junction breaking. Furthermore, the distinction in catalytic activity between different halogen atoms can be compared as well. This study establishes the intrinsic relationship among the reaction activation energy, the chemical bond breaking energy and the single-molecule junction breaking process, strengthening our mastery of catalytic reactions towards precise chemistry.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lanlan Guo,Wei Zhao,Linlin Dong,Xin Shi,Guodong Wang,Rui Li,Jianliang Cao,Xueli Yang,Xiaolian Liu,Yan Wang
The construction of high-performance sensitive materials is a basis for excellent sensors. Among prior SnS 2 -based sensors, high sensing performance often accompanies high operating temperatures or expensive costs, which limits their practical use. Herein, we employed Sr doping and NaBH 4 treatment strategies to increase the S-vacancies content in the SnS 2 microflowers. Particularly, this composite sensitive material shows large specific surface area, low crystallinity and rich S-vacancies content, which enables this sensor excellent sensing properties toward NO 2 , with a response of 4.7 toward 5 ppm NO 2 at 100 °C. In addition, this sensor has a low detection limit for NO 2 as low as 0.2 ppm, which is a lower value compared to many SnS 2 -based NO 2 sensors as reported. XRD, SEM, TEM, EPR and BET characterization combined with density functional theory (DFT) calculations are adopted to illustrate the enhancement mechanism toward NO 2 of the composite sensitive materials fabricated in this work. This study provides new ideas and scientific basis for the construction of metal sulfide based NO 2 sensors, which has important theoretical significance and application value.
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高影响因子
IONICS
·
2022
·Vol. 28
·期 3
·1157-1166
·
IF 2.961
Jin Zhengfei,Ma Xiangyu,Qiu Linlin,Liu Yang,Yuan Yongfeng,Song Lixin,Du Pingfan,Xiong Jie
Compared to conventional lithium batteries, lithium-sulfur (Li–S) batteries are not only low-cost and environmentally friendly but also have a high theoretical energy density. However, the insulating nature of sulfur materials and the poor cycle stability of Li–S batteries inhibit their commercialization. Herein, porous carbon nanofibers (PCNFs) were fabricated by a facile electrospinning method and used as a cathode hosting sulfur for Li–S batteries. The porous structure effectively restrained soluble polysulfides from migrating due to shuttle effect of lithium-sulfur batteries. With the PCNFs as the sulfur host, the PCNFs/S cathode exhibited excellent cycling stability. An initial specific capacity of 835 mAh g −1 at 0.1C and a reversible capacity of 98.6% after 100 cycles were achieved. This outstanding performance can be ascribed to the rational design of the electrode structure, which can increase the interfacial contact and provide a large number of electrochemically active sites for polysulfide storage.
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