International Journal of Electrochemical Science
·
2023
·
IF 1.5
Rujing Ban,Zhengyan Xu,Yang Yang,Dayong Fan,Huidan Lu,Yongping Liu
This work synthesized ultrathin 2D CdSe nanosheets by a facile solvothermal method. The morphology, structure, composition, and thermal stability of the samples were studied and analyzed using transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), infrared spectra (IR), and thermogravimetric (TG) methods. Results demonstrated that stable wurtzite-structured CdSe nanosheets with 2-3 nm thickness were successfully fabricated. UV-Vis absorption spectroscopy (UV-Vis) and fluorescence spectroscopy analysis exhibited the characteristic absorption peaks and fluorescence emission peaks of CdSe nanosheets with narrow full-width half-maximums (fwhm) and slight Stokes shift, implying ultrathin structure. Photoelectrochemical (PEC) measurement declared a fast and stable photo-response for the as-prepared CdSe ultrathin nanosheets. With the reaction temperature increasing, the PEC activity enhanced due to the decreased nanosheets thickness. This paper provides a new route for the synthesis of CdSe ultrathin nanosheets and their application in the field of photoelectrochemical catalysis.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 24
·5406-5415
·
IF 7
Junzhe Fu,Weijiang Yu,Xuedan Qian,Youxiang Wang,Jian Ji
Carbon monoxide (CO) is regarded as a promising therapeutic agent for chemotherapy sensitization. To simultaneously achieve controllable in situ CO production and efficient chemotherapeutics delivery is of great significance. Here, we presented a polyvinylpyrrolidone (PVP) core–shell microneedle (MN) system that encapsulated the effervescent component, photocatalyst, and doxorubicin hydrochloride (Dox·HCl) for CO-sensitized chemotherapy. Upon the insertion of MNs, the effervescent component, composed of sodium bicarbonate and tartaric acid, was exposed to interstitial fluid, leading to the burst release of carbon dioxide (CO2). The generated gas not only enhanced the diffusion of Dox·HCl but also served as a substrate for the photocatalytic generation of CO. From the experimental results, the photocatalyst CuS atomic layers (CAL) displayed an effective CO2 photoreduction performance, which could realize an irradiation time/intensity-dependent CO-controlled release. Ex vivo permeation studies demonstrated that effervescent CO2 production markedly enhanced the intradermal diffusion of Dox·HCl. Eventually, the robust antitumor efficacy of this versatile MN platform was proved in B16F10-bearing nude mice. This CO-sensitized chemotherapeutic MN system offered a novel strategy for transdermal gas/drug delivery, which might provide a new direction in tumor suppression.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.2
Wenxi Zhu,Xiuhua Zheng
The development of high-temperature and salt-resistant foaming agents is critical to the successful drilling of complex and low-pressure reservoirs. In this study, a novel alkyl glycine surfactant (AGS-8) was synthesized by the one-step method. The foam quality of AGS-8 at high temperatures (140–180 °C) and the salt solutions (5–36%wt) was evaluated by the Waring-Blender method to explore its applicability in harsh reservoirs. Results show that: (1) The successful synthesis and chemical structure of AGS-8 was determined by FTIR and 1H-NMR. (2) AGS-8 shows good thermal stability within 330 °C and has high surface activity. (3) AGS-8 generated stable foams after aging at 180 °C for 16 h. The outstanding high-temperature foam stability of AGS-8 is an important feature different from the conventional commercial foaming agents. (4) AGS-8 generated stable foams in saturated salt solution (36%wt NaCl) after 150 °C aged. A synergistic foam stabilization effect was found between high concentrations of NaCl (≥25%wt) and AGS-8. (5) The foam stabilization mechanism of AGS-8 was discussed and can be summarized as the electrostatic attraction effect of head groups and the enhancement of inter-molecular repulsive force. In conclusion, AGS-8 was found to be a promising foaming agent in the drilling of high-temperature salt-gypsum formations.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2023
·
IF 8
Wei Xu,Honglan Wang,Lihui Dong,Pan Zhang,Yan Mu,Xueyan Cui,Jianping Zhou,Meirong Huo,Tingjie Yin
Introduction: Herein, a hyaluronic acid (HA)-coated redox-sensitive chitosan-based nanoparticle, HA(HECS-ss-OA)/GA, was successfully developed for tumor-specific intracellular rapid delivery of gambogic acid (GA).Materials and methods: The redox-sensitive polymer, HECS-ss-OA, was prepared through a well-controlled synthesis procedure with a satisfactory reproducibility and stable resulted surface properties of the assembled cationic micelles. GA was solubilized into the inner core of HECS-ss-OA micelles, while HA was employed to coat outside HECS-ss-OA/GA for CD44-mediated active targeting along with protection from cation-associated in vivo defects. The desirable redox-sensitivity of HA(HECS-ss-OA)/GA was demonstrated by morphology and particle size changes alongside in vitro drug release of nanoparticles in different simulated reducing environments.Results: The results of flow cytometry and confocal microscopy confirmed the HA-receptor mediated cellular uptake and burst drug release in highly reducing cytosol of HA(HECS-ss-OA)/GA. Consequently, HA(HECS-ss-OA)/GA showed the highest apoptosis induction and cytotoxicity over the non-sensitive (HA(HECS-cc-OA)/GA) and HA un-coated (HECS-ss-OA/GA) controls against A549 NSCLC model both in vitro and in vivo. Furthermore, a diminished systemic cytotoxicity was observed in HA(HECS-ss-OA)/GA treated mice compared with those treated by HA un-coated cationic ones and GA solution.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Shao-Hong Guo,Jie Zhou,Xue Zhao,Chun-Yi Sun,Si-Qi You,Xin-Long Wang,Zhong-Min Su
Development of efficient, selective and low-cost photocatalysts, ideally constructed from Earth-abundant elements, is still a big challenge for CO 2 photoreduction. Herein, adopting mixed halides strategy, the activity of all-inorganic perovskites toward CO 2 reduction is enhanced sharply under simulated sunlight without photosensitizer, meanwhile maintaining high selectivity of CO and CH 4 production. Via regulating ratio of Br and Cl, the yield of CO and CH 4 changes obviously and the optimized catalyst is CsPb(Br 0.5 /Cl 0.5 ) 3 with a total yield of CO and CH 4 up to 875 μmol/g (selectivity of 99%) which outperforms any other reported halide perovskites and is 4.5 and 9.1 folds higher than that of CsPbBr 3 and CsPbCl 3 under the same condition. The efficient charge separation and moderate stability in mixed-halide perovskites may account for the excellent performance in CO 2 reduction. This study may provide a new strategy in design of high performance and low-cost halide perovskite materials for photocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 7
·075704
·
IF 3.404
Weiwei Chen,Xiaosheng Tang,Zhigang Zang,Yue Shi,Zhaoqi Yang,Juan Du
Doping of Mn2+ into semiconductor nanocrystals has been demonstrated to endow them with novel electronic, optical and magnetic functionalities. In this paper, Mn-doped CsPbX3 (X = Br, Cl) quantum dots (QDs) were synthesized at room temperature via a facile strategy by introducing dimethyl sulfoxide (DMSO)-MnBr2/PbX2 composite as a precursor. The excitonic emission spectra of the as-obtained Mn-doped CsPbX3 QDs can be tuned from 517 nm to 418 nm by adjusting the ratio of PbBr2/PbCl2 precisely, and the luminescence mechanism of the doped QDs is discussed in detail. Moreover, the highest photoluminescence quantum yield of the Mn2+ emission achieves 36.7%, which is comparable with QDs prepared by the conventional hot-injection method. Depending on the ratios of PbPb2/PbCl2, the energy transfer rate from the band-edge to Mn2+ excited state is in the range of 0.006–20.42 × 107 s−1. Furthermore, white light-emitting diodes (LEDs) were successfully fabricated by combining the as-prepared Mn-doped CsPbX3 QDs with commercial UV GaN chips, and the high luminous efficiency of the as-prepared white LEDs was developed to 55.9 lm W−1. This work strongly supports the fact that Mn-doped CsPbX3 QDs are promising materials for application in lighting and displaying fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Jun Yuan,Liang Hu,Zhenyu Xu,Yiyue Zhang,Hui Li,Xingzhong Cao,Huawei Liang,Shuangchen Ruan,Yu-Jia Zeng
Polycrystalline film photodetectors often suffer from several drawbacks, such as uncontrollable defect species, grain boundary scattering, and surface oxygen trapping/detrapping, hindering their practical applications in high-performance UV photodetection. In this work, we induce an acceptor-type zinc vacancy (VZn) defect in zero-dimensional ZnO nanocrystals by a dual thermal annealing process, which has been closely examined by a defect-sensitive electron paramagnetic resonance technique. The optimization of annealing parameters can well tune the VZn concentration and induce a considerable self-powered behavior, which is believed to result from ionized acceptor enhanced charge separation. On the other aspect, the capping of metallic Zn can lead to the formation of abundant interface conducting channels for the highly efficient charge transport and extraction. The optimized responsivity is enhanced from 5.3 × 10–3 to 15.3 A W–1, and the average rise and decay times remain at 36.6 and 101.8 ms, respectively. Conductive atomic force microscopy confirms a uniform photocurrent distribution in the annealed polycrystalline films, suggesting the significance of synergies of lattice defects and grain boundary conductive channels. This study unambiguously demonstrates a new route to engineer the photodetection in nanocrystalline oxides, providing a promising prospect for future low-cost, low-power-consumption micro-/nano-optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 2
·220
·
IF 4.034
Guanjie Xing,Xiaoli Liu,Simeng Hao,Xiaohong Li,Louzhen Fan,Yunchao Li
Benefiting from their ultra-small diameters and highly structural anisotropies, ultrathin semiconductor nanowires (USNWs) are well-known for their fascinating physical/chemical properties, as well as their promising applications in various fields. However, until now, it remains a challenge to synthesize high-quality USNWs with well-controlled diameters and lengths, let alone the exploration of their size-dependent properties and applications. To solve such a challenge, we report herein a ligand-induced low-temperature precursor thermolysis route for the controlled preparation of ultrathin ZnS nanowires, which is based on the oriented assembly of the in-situ formed ZnS clusters/tiny particles. Optimized synthetic conditions allowed the synthesis of ZnS nanowires with a diameter down to 1.0 nm and a length approaching 330 nm. The as-prepared ultrathin ZnS nanowires were then intensively examined by morphological, spectroscopic and electrochemical analytical means to explore their size-dependent optical absorption properties, photocatalytic activities and band-edge energy levels, as well as their underlying growth mechanism. Notably, these USNWs, especially for the thinnest nanowires, were identified to possess an excellent performance in both the selective absorption of ultraviolet (UV) light and photocatalytic degradation of dyes, thus enabling them to serve as longpass ultraviolet filters and high-efficiency photocatalysts, respectively. For the ultrathin ZnS nanowires with a diameter of 1.0 nm, it was also interesting to observe that their exciton absorption peak positions were kept almost unchanged during the continuous extension of their lengths, which has not been reported previously.Keywords:ultrathin semiconductor nanowires;size-controlled synthesis;size-dependent optoelectronic properties
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 9
·4872-4880
·
IF 10.733
Jianyu Tong,Jingwei Luo,Li Shi,Jiajing Wu,Lingyun Xu,Jiamei Song,Peng Wang,Hongbo Li,Zhengtao Deng
The high-performance light-management slabs made of low-cost, highly emissive, and ultra-stable nanocrystal (NC)-polymer composites are desirable for application in large-area luminescent solar concentrators (LSCs). However, although the reported photoluminescence (PL) quantum yield (QY) of NCs in solution is up to 90%, PL QY of NCs in a polymer matrix is usually low, which limits the performance of LSCs. Herein, we demonstrated a new strategy for the synthesis of formamidinium lead bromide (FAPbBr3) NCs via room-temperature solvent-induced reprecipitation using dicarboxylic acids as ligands and the preparation of NC-polymer composite slabs for LSCs. Due to the strong binding of dicarboxylic acids, the as-synthesized decanedioic acid (DA)-capped FAPbBr3 NCs displayed high PL QY (90 ± 5%), increased chemical yield, and improved stability as compared to monocarboxylic oleic acid (OA)-capped NCs (PL QY of 80 ± 5%) synthesized in the same conditions. Furthermore, in the presence of toluene as the solvent, these DA-capped NCs exhibited good compatibility with polystyrene (PS); thus, the NCs-PS slurry exhibited appropriate viscosity. Therefore, it was convenient to deposit the slurry onto commercially available polymethyl methacrylate (PMMA) slabs with a standard doctor blade. The optimized NCs-PS-PMMA slabs with PL QY of 92 ± 5% were sustained for over 1000 hours under high-temperature (60 °C) and high-humidity (relative humidity, RH = 90%) environments. The results show that the perovskite NC-based slabs developed in this study have the advantages of low cost, high emissivity, and good stability and may contribute to the field of LSCs.
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2019
·Vol. 7
·期 4
·1686-1695
·
IF 5.251
Man Yang,Han Wang,Zhaohui Wang,Zhihao Han,Yueqing Gu
The efficacy of photodynamic therapy (PDT) was greatly hindered by the use of a 980 nm laser with undesired overheating effects as well as low reactive oxygen species (ROS) yields. Herein, we address these problems using a dual-photosensitizer (PS) loaded upconversion nanoparticle (UCNP) system. In detail, the NaYF4:Yb/Er/Nd@NaYF4:Nd core–shell UCNP system was designed to exhibit 808 nm laser excitation ability to avoid unfavorable thermal effects. More importantly, the co-encapsulation of dual PS, in terms of merocyanine 540 (MC540) and zinc phthalocyanine (ZnPc), could be respectively triggered by the dual emissions of UCNPs, which could generate sufficient ROS with improved efficiency. Furthermore, in vitro and in vivo studies were conducted to confirm the folate receptor (FR)-overexpressed cancer cell- or tumor-specific targeting ability with minimal side effects on normal tissue, by using this dual PS loaded UCNP system with the modification of the targeting group folic acid (FA). It is worth mentioning that the singlet oxygen production assay and PDT treatment demonstrated significantly enhanced PDT efficacy of the dual-PS approach, in comparison with the single PS method. In short, the FR-targeted dual-PS nanoconstructs maximized the anti-tumor efficacy of PDT by taking advantage of dual fluorescence emission and 808 nm excitation of UCNPs, which might inspire the future development of noninvasive deep-seated tumor treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanophotonics
·
2018
·Vol. 7
·期 12
·1949-1958
·
IF 6.014
Minjie Fang,Sihui Huang,Dong Li,Chunli Jiang,Pei Tian,Hechun Lin,Chunhua Luo,Wenlei Yu,Hui Peng
Stretchable and self-healing polymer gels with luminescent property are very promising materials for next generation soft optical devices. This work presents the preparation of self-healing and luminescent polymer gels by simply blending organometal halide perovskite nanocrystals (OHP NCs) with poly(dimethylsiloxane)-urea copolymer (PDMS-urea). On the one hand, the obtained luminescent gels are not only flexible, stretchable and relatively transparent, they also exhibit excellent self-healing capability due to the reversible hydrogen bonding network in the PDMS-urea copolymer. On the other hand, the embedding of OHP NCs (MAPbBr 3 and MAPbI 3 NCs) inside the hydrophobic PDMS-urea gel greatly improved the photoluminescence stability of OHP NCs against water. Their applications as phosphors for LEDs have been demonstrated. Both the MAPbBr 3 /PDMS-urea gel and MAPbI 3 /PDMS-urea gel can fully convert the blue emission of GaN chip to green and red emissions, respectively. These gels can be used as photoluminescent materials in flexible optical devices with good self-healing capability.
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Qin Zhu,Chu Liu,Li Zhou,Ling Wu,Kejun Bian,Julan Zeng,Jianxiu Wang,Zemeng Feng,Yulong Yin,Zhong Cao
Nanometer-sized copper sulfide has remarkable properties such as metal like electrical conductivity and electrocatalytic activity . In this work, ultrathin copper sulfide nanosheets (CuS NS) were synthesized and employed to modify on surface of glassy carbon electrode (GCE) combining with chitosan (CS) and acidified multi-walled carbon nanotubes (F-MWCNTs). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the shape of CuS NS was hexagon with side length of 13.33 ± 0.67 nm and thickness of 4.50 ± 0.58 nm. The electrochemical characteristics of different nanocomposite modified electrodes were examined by using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), indicating that the modified electrode of CuS NS-CS/F-MWCNTs/GCE possessed good electrocatalytic activity towards oxidation of L-tyrosine (L-Tyr). Under the optimal condition, the modified electrode exhibited a wide linear response range for L-Tyr (0.08–1.0 μM) with a detection limit of 4.9 nM. No obvious interferences from coexisted two-fold of L-tryptophan and 50-fold of other amino acids could be observed, indicating its relatively good selectivity. The electrode also had good repeatability, reproducibility and stability. Compared with a commercial instrument analytical method, HPLC , the electrode can be successfully applied to the determination of L-Tyr in pig serums with a recovery rate of 95.7%–102.6%, and its test results are in good agreement with that of HPLC, showing its promising application value.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）