OPTICS EXPRESS
·
2022
·Vol. 30
·期 20
·36802-36812
·
IF 3.833
Dongkai Li,Dongkai Li,Yijun Xu,Yijun Xu,Jia Guo,Feng Zhang,Yule Zhang,Jie Liu,Han Zhang,Han Zhang
Here, we systematically report on the preparation of high-quality few-layered MnPS3 nanosheets (NSs) by chemical vapor transport (CVT) and mechanical stripping method, and its carrier dynamics and third-order nonlinear optical properties were studied. Using the classical technique of open aperture Z-scan, a typical phenomenon of saturable absorption (SA) was observed at 475 nm, which indicates that the material is expected to be used as a saturable absorber in ultrafast lasers. The typical phenomenon of reverse saturation absorption (RSA) is observed at 800 and 1550 nm, which shows its potential in the field of broadband optical limiting. Compared with graphene, BP, MXene, MoS2 and other typical two-dimensional materials, MnPS3 NSs has a higher modulation depth. Using the non-degenerate transient absorption spectroscopy technology at room temperature, a slower cooling process of thermal carrier of MnPS3 was observed. Moreover, the carrier lifetime can be tuned according to the wavelength. This work is of great significance to the improvement of MnPS3 based devices, and lays a foundation for the application of MnPS3 in short-wavelength photovoltaic cell, photoelectric detection and other fields.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Kanxing Chen,Jincheng Liu,Zhilin Huang,Shuang Zong,Lingling Liu,Wei Tan
Photocatalytic hydrogen evolution is a prospective approach to solve the problem about energy crisis by fossil fuel combustion . As a possible novel photocatalyst for hydrogen generation , MnPS 3 suffered from the lower photocatalytic activity caused by its high electron-hole recombination rate and poor oxidation capability of holes. In this paper, the MnPS 3 nanosheets were exfoliated under sonication process in the solution of N-methylpyrrolidone (NMP) and 3-ethoxypropylamine, and then a series of Z-scheme 2D-0D MnPS 3 –Cs 4 W 11 O 35 composites were prepared by a facile electrostatic assembling approach. The exfoliated MnPS 3 nanosheets with the thickness of 5.4 nm present evidently increased interlayer spacing of 17.6 Å compared with 6.42 Å of bulk MnPS 3 . The Cs 4 W 11 O 35 of 20–25 nm are uniformly immobilized on the surface of 400 nm exfoliated MnPS 3 sheets with strong interfacial interaction of S–W–O bonds. The MnPS 3 –Cs 4 W 11 O 35 composites show extended light absorption area, reduced charge recombination and significantly improved hydrogen generation activity compared with MnPS 3 nanosheets. The highest hydrogen evolution rate of the MnPS 3 –Cs 4 W 11 O 35 composites reaches 99.6 μmol g −1 h −1 with a Cs 4 W 11 O 35 mass percent of 10.9, which is 2.9 times of MnPS 3 nanosheets. The photocatalytic activity of MnPS 3 –Cs 4 W 11 O 35 remains nearly unchanged after 4 cycles. As far as we are aware, there is no work carried out on the exfoliation of MnPS 3 sheets in NMP and the fabrication of MnPS 3 –Cs 4 W 11 O 35 composite for the enhanced photocatalytic hydrogen generation yet. Our work provides a new reference method for the preparation of unlaminated composite materials, and the novel MnPS 3 -based composite will be a useful supplement to the photocatalytic production of clean energy.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2023
·
IF 15.1
Hanhan Xie,Ming Yang,Xiaoli He,Zhen Zhan,Huaide Jiang,Yanmei Ma,Chengzhi Hu
Manganese phosphosulphide (MnPS 3 ), a newly emerged and promising member of the 2D metal phosphorus trichalcogenides (MPX 3 ) family, has aroused abundant interest due to its unique physicochemical properties and applications in energy storage and conversion. However, its potential in the field of biomedicine, particularly as a nanotherapeutic platform for cancer therapy, has remained largely unexplored. Herein, a 2D “all-in-one” theranostic nanoplatform based on MnPS 3 is designed and applied for imaging-guided synergistic photothermal-chemodynamic therapy. (Iron) Fe (II) ions are immobilized on the surface of MnPS 3 nanosheets to facilitate effective chemodynamic therapy (CDT). Upon surface modification with polydopamine (PDA) and polyethylene glycol (PEG), the obtained Fe-MnPS 3 /PDA-PEG nanosheets exhibit exceptional photothermal conversion efficiency ( η = 40.7%) and proficient pH/NIR-responsive Fenton catalytic activity, enabling efficient photothermal therapy (PTT) and CDT. Importantly, such nanoplatform can also serve as an efficient theranostic agent for multimodal imaging, facilitating real-time monitoring and guidance of the therapeutic process. After fulfilling the therapeutic functions, the Fe-MnPS 3 /PDA-PEG nanosheets can be efficiently excreted from the body, alleviating the concerns of long-term retention and potential toxicity. This work presents an effective, precise, and safe 2D “all-in-one” theranostic nanoplatform based on MnPS 3 for high-efficiency tumor-specific theranostics.
研究领域:
纳米医学
·
肿瘤学
·
生物材料
·
影像医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xinming Geng,Yueyuan Cai,Ming Gao,Xiuyun Ma,Liangmin Yu,Yijun Xu,Wei Shan,Meng Qiu
Photoelectric devices are extensively applied in optical logic systems, light communication, optical imaging, and so on. However, traditional photoelectric devices can only generate unidirectional photocurrent, which hinders the simplification and multifunctionality of devices. Recently, it has become a new research focus to achieve controllable reversal of the output photocurrent direction (bipolar current) in a photoelectric system. Considering that the device with bipolar current adds a reverse current operating state compared to traditional devices, the former is more suitable for developing new multifunctional photoelectric devices. Due to the existence of electrolytes, photoelectrochemical (PEC) systems contain chemical processes such as ion diffusion and migration and electrochemical reactions, which are unable to occur in solid-state transistor devices, and the effect of electrolyte pH on the performance of PEC systems is usually ignored. We prepared a MnPS3-based PEC-type photodetector and reversed photocurrents by adjusting the pH of electrolytes, i.e., the electrolyte-controlled photoelectrochemical photocurrent switching (PEPS) effect. We clarified the effect of pH values on the direction of photocurrent from the perspectives of electrolyte energy level rearrangement splitting and the kinetic theory of the semiconductor electrode. This work not only contributes to a deeper understanding of carrier transport in PEC processes but also inspires the development of advanced multifunctional photoelectric devices.
研究领域:
材料科学
·
光电器件
·
电化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 45
·23266-23273
·
IF 6.895
Ying Zhang,Wenhui Wang,Meng Huang,Ping Liu,Guojing Hu,Chao Feng,Xueyan Lei,Meng Gu,Hongxin Yang,Kaihui Liu,Bin Xiang,Yalin Lu
Detection of the antiferromagnetic (AFM) state is an important issue for the application of two-dimensional (2D) antiferromagnets in spintronics, and interfacial exchange coupling is a highly efficient means to detect AFM order. However, there are no experimental reports of AFM state detection in van der Waals heterostructures, based on which 2D AFM spintronics can be developed. In this paper, we report a spin flop transition (SFT)-induced anomalous Hall effect in a heterostructure of MnPS3/graphite flake (GF) through van der Waals proximity coupling. The scaling behavior study and theoretical calculations confirm that the SFT in AFM MnPS3 can generate momentum-space nonzero Berry curvature integration in the adjacent GF. Our work opens a path for the realization of AFM state detection through the proximity effect in a stacking structure, thereby promoting the application of 2D antiferromagnets in future 2D spintronics.
研究领域:
凝聚态物理
·
自旋电子学
·
二维材料
·
磁性
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）