APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hao Jiang,Hao Chen,Yutuo Fu,Chongshen Guo
To make the most of solar energy, it is of great significance to utilize the near infrared (NIR) light outside the visible and UV region for the related applications. In this work, a multifunctional SnFe 2 O 4 had been designed for this purpose. The SnFe 2 O 4 was a full-solar-range responsive photocatalyst, which could realize the photocatalytic degradation of methylene blue under both visible and near infrared irradiation. Meanwhile, NIR triggered photothermal effect of SnFe 2 O 4 favored sterilization and improved comprehensive purification of sewage. On the basis of unique piezoelectric property, SnFe 2 O 4 also presented the excellent piezocatalytic activity and further a synergistic effect of piezocatalysis enhanced NIR-driven photocatalysis was realized. Finally, the possible mechanism was investigated by radical scavenging tests, ESR signals and density functional theory calculation. The simulated electronic structure and molecular activation well explained the generation of reactive oxygen species and it was also well supported by experimental results. This work provided a theoretical basis for extending use of solar spectrum for the photocatalysis and constructing the multifunctional photocatalysis and piezocatalysis.
研究领域:
材料科学
·
环境科学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2024
·
IF 2.5
Guoliang Zhang,Weihao Jin,Linrui Dong,Jun Wang,Wanzhen Li,Ping Song,Yugui Tao,Lin Gui,Weiwei Zhang,Fei Ge
Drug-resistant bacterial infections cause significant harm to public life, health, and property. Biofilm is characterized by overexpression of glutathione (GSH), hypoxia , and slight acidity, which is one of the main factors for the formation of bacterial resistance . Traditional antibiotic therapy gradually loses its efficacy against multi-drug-resistant (MDR) bacteria. Therefore, synergistic therapy , which regulates the biofilm microenvironment, is a promising strategy. A multifunctional nanoplatform, SnFe 2 O 4 -PBA/Ce6@ZIF-8 (SBC@ZIF-8), in which tin ferrite (SnFe 2 O 4 , denoted as SFO) as the core, loaded with 3-aminobenzeneboronic acid (PBA) and dihydroporphyrin e6 (Ce6), and finally coated with zeolite imidazole salt skeleton 8 (ZIF-8). The platform has a synergistic photothermal therapy (PTT)/photodynamic therapy (PDT) effect, which can effectively remove overexpressed GSH by glutathione peroxidase-like activity, reduce the antioxidant capacity of biofilm, and enhance PDT. The platform had excellent photothermal performance (photothermal conversion efficiency was 55.7 %) and photothermal stability. The inhibition rate of two MDR bacteria was more than 96 %, and the biofilm clearance rate was more than 90 % (150 μg/mL). In the animal model of MDR S. aureus infected wound , after 100 μL SBC@ZIF-8+NIR (150 μg/mL) treatment, the wound area of mice was reduced by 95 % and nearly healed. The serum biochemical indexes and H&E staining results were within the normal range, indicating that the platform could promote wound healing and had good biosafety. In this study, we designed and synthesized multifunctional nanoplatforms with good anti-drug-resistant bacteria effect and elucidated the molecular mechanism of its anti-drug-resistant bacteria. It lays a foundation for clinical application in treating wound infection and promoting wound healing .
研究领域:
生物医学工程
·
抗菌材料研究
·
纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yukai Chen,Yiyi Ji,Jiaojiao Fang,Huimin Wei,Dan Wang,Rulin Dong,Baoying Dai
The recombination of photoinduced carriers hampers the photocatalysis process. Construction of the heterojunction and built-in piezoelectric field boosts the separation of electrons and holes. Herein, a novel magnetic recyclable SnFe2O4(SFO)/ZnO composite with enhanced photocatalytic performance based on the dual electric field synergism was proposed for the first time. This composite apparently alleviates the carrier recombination in SFO and extends the absorption spectrum of ZnO to the full spectrum. Consequently, 20%SFO/ZnO exhibits an excellent efficiency, which is 2.45 times that of ZnO and 4.61 times that of SFO, respectively. The differences in size and morphology between the SFO nanoparticles and the ZnO nanorods provide more contact areas, thus enlarging the deformation and enhancing the piezoelectric effect. The heterojunction and the piezoelectric field work together to modulate the transferring of carriers and elevate the photocatalytic activity. This design offers a plausible avenue for preparing efficient recyclable photocatalysts for application.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 80
·76542-76550
·
IF 3.289
Yuefa Jia,Deok-Hyeon Kim,Taehyoung Lee,Seokwon Kang,B. W. Lee,S. J. Rhee,Chunli Liu
Highly crystalline SnFe2O4 nanoparticles with high saturation magnetization and superior chlortetracycline (CTC) degradation efficiency was developed using a one-pot solvothermal method. The SnFe2O4 nanoparticles about 50 nm were prepared with a simple and cost-effective process performed at 200 °C. Superparamagnetism was observed from the SnFe2O4 nanoparticles with a high saturation magnetization of 74.3 emu g−1. The excellent photocatalytic activity of the SnFe2O4 nanoparticles was demonstrated through the high degradation efficiency of CTC under a visible light/SnFe2O4/9 mM H2O2 process. The effective degradation of CTC with the SnFe2O4 nanoparticles was attributed to the effective absorption of the visible light and the good separation ability of the electron–hole pairs. The synergy effect between SnFe2O4 and H2O2 was analysed, and the optimum initial concentration of H2O2 was determined to be 9 mM to achieve the best photocatalytic result on CTC. The SnFe2O4 nanoparticles also exhibited a fast and easy magnetic retrieval and a stable performance with continuous recycled usage.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
J. Ma,B. Zhao,N. Shao,P. Jiang,H. Yang,B. Li
Photocatalysis is considered a promising strategy for environmental remediation, and the preparation of an efficient, stable, and green photocatalyst is a current urgent need. In this work, a magnetically recoverable SnFe 2 O 4 /Bi 2 WO 6 (SFO/BWO) Z-scheme heterojunction was successfully prepared by a simple one-step hydrothermal process. The prepared 7.5%SFO/BWO nanocomposite exhibited excellent photocatalytic performance, with a degradation efficiency of 96.12% for Rhodamine B (RhB) within 120 min, which were respectively 1.64 and 2.07 times greater than that of pure Bi 2 WO 6 (BWO) and SnFe 2 O 4 (SFO). This obvious improvement in the photocatalytic performance benefited from the increase in the separation efficiency of photogenerated carriers and was based on the construction of Z-scheme heterojunction. Additionally, the radical capture tests demonstrated the main reactive radicals were electron (e − ), hole (h + ), and hydroxy radical (•OH) in the photodegradation system. Furthermore, the composite retains excellent photocatalytic performance after five cycles and is easily recoverable due to its magnetic behavior. Notably, during the toxicity assessment, it was proved that SnFe 2 O 4 /Bi 2 WO 6 could be used to eliminate the toxicities of dyes and antibiotics rapidly. Consequently, SnFe 2 O 4 /Bi 2 WO 6 is a promising and competitive photocatalyst in wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Guang-Li Zhang,Chao-Feng Pan,Yan-Hui Sun,Jing-Lan Wei,Dong-Cai Guan,Jun-Min Nan
In order to improve the electrochemical performance and relieve volume expansion of pure SnFe 2 O 4 anode for lithium-ion batteries (LIBs), we synthesized a novel ZnO/SnFe 2 O 4 /nitrogen-doped carbon composites (ZSFO/NC) with flake-like polyhedron morphology by using ZIF-8 as a sacrificial template. Remarkably, it exhibited an initial charge/discharge capacities of 1078.3/1507.5 mAh g −1 with a high initial coulombic efficiency (ICE) of 71.2%, and maintained a steady charge/discharge capacities of 1495.7/1511.8 mAh g −1 at 0.2 A g −1 after 300 cycles. The excellent rate performance of 435.6 mAh g −1 at a higher current density of 10.0 A g −1 and superior reversible capacity of 532.3/536.2 mAh g −1 after 500 cycles at 2.0 A g −1 were obtained. It revealed that the nitrogen-doped carbon matrix and peculiar structure of ZSFO/NC not only effectively buffered large volume expansion upon (de)lithiation through the synergistic interface action between ZnO, SnFe 2 O 4 and NC, but also improved capacity of the composite by large contribution of surface pseudo-capacitance. The excellent charge–discharge performance showed that ZSFO/NC composite has a great potential for LIBs due to the synergistic effect of the multi-components.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Hao Jiang,Mei Yan,Hao Chen,Xue Chen,Yutuo Fu,Chongshen Guo
How to make full use of solar energy and improve the efficiency of charges separation of photocatalysis has been a concern for scientists all along. To achieve this, this work designed an n-n + homojunction of S-doped SnFe 2 O 4 and applied it to near infrared driven photocatalytic degradation and sterilization. The experimental results demonstrated that S doping significantly enhanced the photocatalytic performance of SnFe 2 O 4 . The degradation rate of ciprofloxacin and the removal rate of Staphylococcus aureus ( S. aureus ) reached up to approximately 65 % and 100 % after 6 h irradiation, respectively. The S-doping could increase the content of shallow trap states in SnFe 2 O 4 , effectively inhibiting the recombination of photogenerated electrons and holes. Moreover, S-doping also enhances the n-type character and forms n-n + homojunction. This n-n + homojunction generates a built-in electric field within the sample, which causes band bending and promotes photogenerated charges transfer and separation. Consequently, more carries are available for the generation of reactive oxygen species. Free radical quenching experiments and ESR tests show that •O 2 − is the main free radical in the photocatalysis. In addition, DFT calculations confirmed the enhanced activation of O 2 after S doping. This work provides a feasible way to effectively promote charges separation and transfer in metalloid-based photocatalysts.
研究领域:
材料科学
·
光催化
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hao Jiang,Mei Yan,Hao Chen,Yutuo Fu,Chongshen Guo
Strong Coulomb force between photogenerated electrons and holes often results in high level exciton pairs during the photocatalytic process, which hinders the formation of reactive oxygen species (ROS) in the photocatalytic reaction, particularly for the photocatalysis under near infrared (NIR) irradiation. Hence, it is crucial to dissociate excitons into free carriers. In this study, we propose a novel amorphous–crystalline heterojunction of a-CeO 2 /SnFe 2 O 4 for the NIR-driven photocatalytic degradation and sterilization. The introduction of disorder–order interface in heterojunction could greatly enhance the built-in electric field, thereby serving for exciton dissociation. Additionally, the presence of oxygen vacant sites in the a-CeO 2 /SnFe 2 O 4 system can effectively modulate the electronic structure of the material, facilitating exciton dissociation in conjunction with the built-in electric field. The DFT simulation proved the positive impact of the disorder–order interface on charge separation, as well as its enhancement on the activation of O 2 and H 2 O molecules. This work provides a theoretical support for the creation of disorder–order interface to promote exciton dissociation and enhance photocatalytic performance.
研究领域:
材料科学
·
光催化
·
表面化学
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yan-Hui Sun,Dong-Cai Guan,Jing-Lan Wei,Guang-Li Zhang,Jun-Min Nan,Yue-Peng Cai
A novel inverse spinel SnFe 2 O 4 , with a polyhedral morphology and a mixed core–shell SnFe 2 O 4 @Carbon or Carbon@SnFe 2 O 4 composite are prepared by a facile solvothermal method, and evaluated as anode material for lithium ion batteries (LIBs). The SnFe 2 O 4 exhibits a higher initial discharge/charge capacities of 1212/858 mAh g −1 with an initial coulombic efficiency (ICE) of 70.8% and maintains 812/799 mAh g −1 at the 200th cycle at 0.5 A g −1 and 540/535 mAh g −1 at the 400th cycle even at 4.0 A g −1 . An interesting phenomenon that the capacity of pure SnFe 2 O 4 at each current density decreases rapidly first and then increases gradually and remains stable, which is attributed to the polyhedral morphology and the inverse spinel structure. It can be relieved by compositing with carbon forming core–shell SnFe 2 O 4 @Carbon or Carbon@SnFe 2 O 4 . The composite shows an initial discharge/charge capacities of 1238/820 mAh g −1 with an ICE of 66.2% and maintains much larger capacities of 1223/1200 mAh g −1 at the 200th cycle at 0.5 A g −1 and 608/603 mAh g −1 at the 400th cycle at 4.0 A g −1 . The lithium ions storage mechanism is first elucidated as a diffusion control of pure SnFe 2 O 4 and a combination of capacitive and diffusion control of SnFe 2 O 4 @C composite, respectively.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Meichun Fu,Zhiyu Shao,Yuan Zhang,Qian Zhu,Kuo He,Mengzhu Zhang,Yuzhu Hou,Laiping Fang,Fei Yan,Shuang Zhang,Jianshi Du,Ping’an Ma,Keke Huang,Shouhua Feng
Despite the multiple advantages of high tissue penetration depth, selectivity, and noninvasiveness of photothermal-assisted antitumor synergistic therapy, developing photothermal agents with multifunctional characteristics, desirable tumor therapeutic effects, and biological stability remains a key challenge. Herein, an electronic structure-regulated strategy is proposed to activate self-adaptive Sn–Fe electron pair centers (Sn2+/Sn4+ and Fe2+/Fe3+) through loading the electron donor Pt (Pt/SFO-1, -2, -3, -4). Experimental and theoretical calculations indicate that abundant dynamic active centers can facilitate the production of reactive oxygen species (ROS), which enables Pt/SFO samples to possess catalase (CAT), peroxidase (POD), and oxidase (OXD) enzyme-like activities. Upon near-infrared (NIR) laser irradiation, Pt/SFO-2 with a Pt load of 0.9% achieves the highest ROS production, showing a 9-fold compared with SnFe2O4 and implements the synergistic therapy of photothermal therapy (PTT), photodynamic therapy (PDT), and chemodynamic therapy (CDT). The electronic state regulation of inorganic photothermal agents not only improves tumor therapeutic effects but also offers a novel strategy to regulate the electron structure of active centers.
研究领域:
生物医学工程
·
材料科学
·
肿瘤学
·
纳米技术
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zi-Yu Wang,Wei-Lin Li,Chao-Feng Pan,Yan-Hui Sun,Jun-Min Nan
A series of carbon coated SnFe 2 O 4 (SFO) with octahedron, decahedron and tetrakaidecahedron morphologies have been synthesized by a simple hydrothermal process using ferrocene as common source of iron and carbon, applying a cationic surfactant CTAB to modify the morphology. Compared with the octahedral SFO (no CTAB) and decahedral SFO-0.1 (with CTAB at the first critical micelle concentration (CMC)), the tetrakaidecahedral SFO-0.7 (with CTAB at the second CMC) as an anode of LIB shows a high charge/discharge capacity of 481.0/482.7 mAh g −1 after 1000 cycles at 2 A g −1 , and 281.0/281.6 mAh g −1 after 2000 cycles at 6 A g −1 . The investigations on Li-ions inter-/de-intercalation kinetics show that the main rate-controlled step of SFO-0.7 is pseudocapacitive behavior, with higher contribution of 95.88% at a scan rate of 2.0 mV s −1 . The results suggest that the carbon layer obtained directly from ferrocene can effectively inhibit the volume expansion and structure damage of SnFe 2 O 4 . At the same time, more oxygen-vacancies increase the conductivity, the enhanced strength of the dominant (1 1 1) plane can adsorb Li-ions more easily, and the smaller SnFe 2 O 4 can reduce the diffusion distance of Li-ions, all of which lead to a high and stable Li-ions storage capacity and rate capability.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
·
2023
·
IF 4
Yang Shuai
Phototherapy has attracted widespread attention for cancer treatment due to its noninvasiveness and high selectivity. However, severe hypoxia, overexpressed glutathione and high levels of hydrogen peroxide (H 2 O 2 ) of tumor microenvironment limit the antitumor efficiency of phototherapy. Herein, inspired by the specific response of nanozymes to the tumor microenvironment, a simple and versatile nanozyme-mediated synergistic dual phototherapy nanoplatform is constructed. In this study, tin ferrite (SnFe 2 O 4 , SFO) nanozyme as a photosensitizer was surface modified with polydopamine (denoted as P-SFO) and incorporated into poly( l -lactide) to fabricate an antitumor scaffold fabricated by selective laser sintering. On one hand, SFO nanozyme could act as a photoabsorber to convert light energy into heat for photothermal therapy (PTT). On the other hand, it played a role of photosensitizer in transferring the photon energy to generate reactive oxygen species (ROS) for photodynamic therapy (PDT). Importantly, its multivalent metal ions redox couples would decompose H 2 O 2 into O 2 for enhancing O 2 -dependent PDT and consume glutathione to relieve antioxidant capability of the tumors. Besides, polydopamine as a photothermal conversion agent further enhanced the photothermal performance of SFO. The results revealed the PLLA/P-SFO scaffold possessed a photothermal conversion efficiency of 43.52% for PTT and a high ROS generation capacity of highly toxic ·O 2 − and ·OH for PDT. Consequently, the scaffold displayed a prominent phototherapeutic effect with antitumor rate of 96.3%. In addition, the PLLA/P-SFO scaffolds possessed good biocompatibility for cell growth. These advantages endow PLLA/P-SFO scaffold with extensive applications in biomedical fields and opened up new avenue towards nanozyme-mediated synergistic phototherapy.
研究领域:
生物医学工程
·
癌症治疗
·
纳米医学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）