scholarly journals Effect of Ti doping on mechanical and optical properties of super-hard I2d-CN2 materials

RSC Advances ◽  
2017 ◽  
Vol 7 (60) ◽  
pp. 37943-37951 ◽  
Author(s):  
Ze-Cheng Zhao ◽  
Chuan-Lu Yang ◽  
Mei-Shan Wang ◽  
Xiao-Guang Ma ◽  
Li-Bo Zhan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Energy ◽  
Visible Light ◽  
Formation Energy ◽  
High Hardness ◽  
Light Response ◽  
Energy Harvest ◽  
Visible Light Range ◽  
Ti Doping

The Ti-doped I2d-CN2 structures are favorable solar energy harvest or light-response materials due to their lower formation energy, high hardness and large absorption in the infrared and visible light range.

scholarly journals Graphene-Assisted Goos–Hänchen Shift in a Planar Multilayer Configuration in the Visible Light Range

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Wei Lin ◽  
Zhichen Xiao ◽  
Wenyun Zhou ◽  
Mengjiao Ren ◽  
Zhiwei Zheng
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Fermi Energy ◽  
Optical Sensing ◽  
Optical Beam ◽  
The Novel ◽  
Incident Wavelength ◽  
Visible Light Range

In this paper, the graphene-assisted Goos–Hänchen (GH) shift of the optical beam reflected from a planar multilayer configuration is investigated. The increased positive Goos–Hänchen shifts can be modulated by adjusting the Fermi energy due to graphene with unique optical properties in the visible light range. Moreover, the GH shift can be tuned by varying the layers of graphene, the thickness of the medium, incident wavelength, and so on. These results will be useful for designing the novel graphene-based optical sensing and switching.

scholarly journals NEW TETRA (1,4-DITHIN)PORPHYRAZINES AND THEIR APPLICATION AS PHOTOCATALYSTS FOR PURIFYING ENVIRONMENTAL WATERS: AN APPROACH TO GREEN CHEMISTRY

2018 ◽  
Vol 15 (30) ◽  
pp. 259-267
Author(s):  
H. H. ABDEL-RAZIK ◽  
H. A. ALMAHY ◽  
Y. A. EL-BADRY
Keyword(s):  
Acetic Acid ◽  
Solar Energy ◽  
Green Chemistry ◽  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Metal Salt ◽  
Average Yield ◽  
Environmental Waters ◽  
Air Atmosphere ◽  
Visible Light Range

2,3-Dichloro-5,6-dimethylbenzoquinone reacted with di(sodiothio)maleonitrileto produce heterocyclic thianone, 6,7-dimethyl-5,8-dioxo-5,8-dihydro-1,4-benzodithin-2,3-dicarbonitrile which was cyclo-tetramerizedin the presence of lithium/pentanol and acetic acid producing tetra 6,7-dimethyl-5,8-dioxo-5,8-dihydro-1,4benzodithin-porphyrazine (2H-Pz). Likewise, the dicarbonitrile compound was cyclo-tetramerized in the presence of metal salt and quinoline affording tetra 6,7-dimethyl-5,8-dioxo-5,8-dihydro-1,4-benzodithinporphyrazinato-metal II (M-Pz), M is Co, Ni or Zn. Photoactivity of the synthesized porphyrazines was reached out to the visible light range. The prepared porphyrazines showed efficient sensitized catalysts by using of solar energy for the completely photocatalytic oxidation of thiophenol and benzyl thiol to their disulfides (with an average yield of 93% and 90%, respectively) in the presence of air atmosphere within 20 minutes.

Toward Visible Light Response: Overall Water Splitting Using Heterogeneous Photocatalysts

Green ◽  
2011 ◽  
Vol 1 (4) ◽  
Author(s):  
Kazuhiro Takanabe ◽  
Kazunari Domen
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Energy Conversion ◽  
Water Splitting ◽  
Large Scale ◽  
Light Response ◽  
Solar Flux ◽  
Powder Form ◽  
Overall Water Splitting ◽  
Visible Light Response

AbstractExtensive energy conversion of solar energy can only be achieved by large-scale collection of solar flux. The technology that satisfies this requirement must be as simple as possible to reduce capital cost. Overall water splitting by powder-form photocatalysts directly produces a mixture of H

scholarly journals Visible Light-Responsive N-Doped TiO2 Photocatalysis: Synthesis, Characterizations, and Applications

2021 ◽  
Author(s):  
Shiwen Du ◽  
Juhong Lian ◽  
Fuxiang Zhang
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Environmental Remediation ◽  
Solar Spectrum ◽  
Light Response ◽  
Physicochemical Characteristics ◽  
Energy Utilization ◽  
As Doping ◽  
Energy Applications ◽  
Recent Developments

AbstractPhotocatalysis based on semiconductors has recently been receiving considerable research interest because of its extensive applications in environmental remediation and renewable energy generation. Various semiconductor-based materials that are vital to solar energy utilization have been extensively investigated, among which titanium oxide (TiO2) has attracted considerable attention because of its exceptional physicochemical characteristics. However, the sluggish responsiveness to visible light in the solar spectrum and the inefficient separation of photoinduced electron–hole pairs hamper the practical application of TiO2 materials. To overcome the aforementioned serious drawbacks of TiO2, numerous strategies, such as doping with foreign atoms, particularly nitrogen (N), have been improved in the past few decades. This review aims to provide a comprehensive update and description of the recent developments of N-doped TiO2 materials for visible light-responsive photocatalysis, such as (1) the preparation of N-doped/co-doped TiO2 photocatalysts and (2) mechanistic studies on the reasons for visible light response. Furthermore, the most recent and significant advances in the field of solar energy applications of modified N-doped TiO2 are summarized. The analysis indicated the critical need for further development of these types of materials for the solar-to-energy conversion, particularly for water splitting purposes.

Propose two-dimensional Sb2Te2X (X = S, Se) with isotropic electron mobility and remarkable visible-light response

2019 ◽  
Vol 21 (27) ◽  
pp. 14904-14910 ◽  
Author(s):  
Yan Liang ◽  
Jianwei Li ◽  
Hao Jin ◽  
Baibiao Huang ◽  
Ying Dai
Keyword(s):  
Optical Properties ◽  
Visible Light ◽  
Electron Mobility ◽  
Light Response ◽  
Two Dimensional ◽  
Electronic And Optical Properties ◽  
Photovoltaic Materials ◽  
Visible Light Response

The highly desired electronic and optical properties of the proposed 2D Sb2Te2X compounds place them in the realm of electronic and photovoltaic materials.

Structural stability and optical properties of two-dimensional perovskite-like CsPb2Br5 microplates in response to pressure

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 820-825 ◽  
Author(s):  
Zhiwei Ma ◽  
Fangfang Li ◽  
Guangyu Qi ◽  
Lingrui Wang ◽  
Chuang Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
Visible Light ◽  
Structural Stability ◽  
Light Response ◽  
Layered Perovskite ◽  
Two Dimensional ◽  
Visible Light Response

The structural stability and visible light response of two-dimensional layered perovskite-like CsPb2Br5 microplates were investigated by in situ high-pressure technology.

scholarly journals Enhancement of photo-driven biomethanation under visible light by nano-engineering of Rhodopseudomonas palustris

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Meng-Yuan Chen ◽  
Zhen Fang ◽  
Li-Xia Xu ◽  
Dao Zhou ◽  
Xue-Jin Yang ◽  
...  
Keyword(s):  
Solar Energy ◽  
Visible Light ◽  
Methane Production ◽  
Cell Damage ◽  
Rhodopseudomonas Palustris ◽  
Light Response ◽  
Great Promise ◽  
Hybrid Cells ◽  
Ambient Conditions ◽  
Visible Light Response

AbstractBiomethanation is of great interest as it can transform CO2 to methane under ambient conditions. In particular, genetically engineered bacterium of Rhodopseudomonas palustris showed great promise for one-step biomethanation powered by solar energy, which is attractive for CO2 fixation as well as solar energy storage. However, biomethanation with R. palustris under visible light is inefficient due to its poor visible light response. In this study, CdS quantum dots with excellent visible light response were prepared and R. palustris/CdS hybrid cells were constructed. Interestingly, this bio-nano-hybrid cells showed high cell viability without significant cell damage, and the biomethanation performance of was enhanced about ~ 79% compared to that of the bare R. palustris cells. Moreover, the effects of different parameters on the methane production of this bio-nano-hybrid cells were determined, and the methane production rate was further improved by parameter optimization. This work demonstrated an efficient approach to reinforce the biomethanation of bacteria under unfavorable light wavelength, which would be helpful to extend the light spectra for photo-driven biomethanation.

Optical Properties of Photodynamic Therapy Drugs in Different Environments: The Paradigmatic Case of Temoporfin

2020 ◽  
Author(s):  
busenur Aslanoglu ◽  
Ilya Yakavets ◽  
Vladimir Zorin ◽  
Henri-Pierre Lassalle ◽  
Francesca Ingrosso ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Optical Properties ◽  
Photodynamic Therapy ◽  
Minimally Invasive ◽  
Visible Light ◽  
Cancer Treatment ◽  
Singlet Oxygen ◽  
Tumor Cells ◽  
Molecular Oxygen ◽  
Computational Tools

Computational tools have been used to study the photophysical and photochemical features of photosensitizers in photodynamic therapy (PDT) –a minimally invasive, less aggressive alternative for cancer treatment. PDT is mainly based by the activation of molecular oxygen through the action of a photoexcited sensitizer (photosensitizer). Temoporfin, widely known as mTHPC, is a second-generation photosensitizer, which produces the cytotoxic singlet oxygen when irradiated with visible light and hence destroys tumor cells. However, the bioavailability of the mostly hydrophobic photosensitizer, and hence its incorporation into the cells, is fundamental to achieve the desired effect on malignant tissues by PDT. In this study, we focus on the optical properties of the temoporfin chromophore in different environments –in <i>vacuo</i>, in solution, encapsulated in drug delivery agents, namely cyclodextrin, and interacting with a lipid bilayer.

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