scholarly journals Alpha Lead Oxide (α-PbO): A New 2D Material with Visible Light Sensitivity

Small ◽  
2018 ◽  
Vol 14 (12) ◽  
pp. 1703346 ◽  
Author(s):  
Prashant Kumar ◽  
Jing Liu ◽  
Pranay Ranjan ◽  
Yaowu Hu ◽  
Sharma SRKC Yamijala ◽  
...  
Keyword(s):  
Visible Light ◽  
Lead Oxide ◽  
Light Sensitivity ◽  
2D Material

Visible-light assisted methylene blue (MB) removal by novel TiO2/adsorbent nanocomposites

2010 ◽  
Vol 61 (11) ◽  
pp. 2863-2871 ◽  
Author(s):  
Wei Zhang ◽  
Linda Zou ◽  
Lianzhou Wang
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Cost Effective ◽  
Light Sensitivity ◽  
Wet Chemical Method ◽  
Adsorption Ability ◽  
Synergistic Interactions ◽  
Dissolved Organic Compounds ◽  
Wet Chemical ◽  
Chemical Procedure

In present work, visible light sensitive TiO2/adsorbent nanocomposites (TNC) were prepared via a facile wet chemical method. Three types of adsorbents including zeolites (F-9, HSZ-690 and HSZ-930), mesoporous silica (MPS-2.7 and 4) and activated carbon, were used as the porous substrates for nanocomposites. Visible light sensitivity was incorporated to TNCs by nitrogen doping of TiO2, which is obtained through the addition of a nitrogen precursor, triethylamine, within the same wet chemical procedure. The photocatalytic and adsorption ability of as-prepared TNC resultants were studied using solutions of methylene blue (MB) as a model pollutant. Synergistic interactions between adsorption and visible-light photocatalysis were observed, as under the assistance of visible-light irradiation all TNCs achieved higher MB removal rates than those by adsorption process alone. The better performance of the as-prepared N-doped TNC reveals its potential to be used for cost effective solar photocatalytic degradation of dissolved organic compounds.

Rutile thin film responsive to visible light and with high UV light sensitivity

2009 ◽  
Vol 44 (3) ◽  
pp. 861-868 ◽  
Author(s):  
Hiroki Nagai ◽  
Sohei Aoyama ◽  
Hiroki Hara ◽  
Chihiro Mochizuki ◽  
Ichiro Takano ◽  
...  
Keyword(s):  
Thin Film ◽  
Visible Light ◽  
Uv Light ◽  
Light Sensitivity

Origin of visible-light sensitivity in N-doped TiO2 films

2007 ◽  
Vol 339 (1-3) ◽  
pp. 20-26 ◽  
Author(s):  
Yoshitaka Nakano ◽  
Takeshi Morikawa ◽  
Takeshi Ohwaki ◽  
Yasunori Taga
Keyword(s):  
Visible Light ◽  
Light Sensitivity ◽  
Tio2 Films ◽  
Doped Tio2

Preparation of Bi1-xLaxVO4 and its Photocatalytic Degradation on Rhodamine B

2016 ◽  
Vol 852 ◽  
pp. 1473-1476
Author(s):  
Yan Ding ◽  
Liang Fang Fu ◽  
Yu Huan Wang ◽  
Liang Chao Li ◽  
Juan Bi Li
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Light Sensitivity ◽  
Structure Morphology ◽  
Photocatalytic Activities ◽  
Testing Techniques ◽  
Composition Structure

A series of photocatalyst Bi1-xLaxVO4 (0.1, 0.3, 0.5, 0.7) powders were prepared by hydrothermal method. The composition, structure, morphology and photocatalytic activity of the samples were researched by means of modern testing techniques. Bi1-xLaxVO4 showed excellent visible-light sensitivity and photocatalytic activities. The degradation rate of sample with x = 0.5 on rhodamine B reached 90 %, which was much higher than that of pure BiVO4.

scholarly journals Light exposure decreases infectivity of the Daphnia parasite Pasteuria ramosa

2019 ◽  
Author(s):  
Erin P. Overholt ◽  
Meghan A. Duffy ◽  
Matthew P. Meeks ◽  
Taylor H. Leach ◽  
Craig E. Williamson
Keyword(s):  
Visible Light ◽  
Light Exposure ◽  
Disease Outbreaks ◽  
Light Sensitivity ◽  
Biologically Relevant ◽  
Light Regimes ◽  
Bacterial Endospores ◽  
Pasteuria Ramosa ◽  
Aquatic Pathogens ◽  
Laboratory Exposure

ABSTRACTClimate change is altering light regimes in lakes, which should impact disease outbreaks, since sunlight can harm aquatic pathogens. However, some bacterial endospores are resistant to damage from light, even surviving exposure to UV-C. We examined the sensitivity of Pasteuria ramosa endospores, an aquatic parasite infecting Daphnia zooplankton, to biologically relevant wavelengths of light. Laboratory exposure to increasing intensities of UV-B, UV-A, and visible light significantly decreased P. ramosa infectivity, though there was no effect of spore exposure on parasitic castration of the host. P. ramosa is more sensitive than its Daphnia host to damage by longer wavelength UV-A and visible light; this may enable Daphnia to seek an optimal light environment in the water column where both UV-B damage and parasitism are minimal. Studies of pathogen light sensitivity help us uncover factors controlling epidemics in lakes, which is especially important given that water transparency is decreasing in many lakes.

scholarly journals Effects of Transition Metal Substituents on Interfacial and Electronic Structure of CH3NH3PbI3/TiO2 Interface: A First-Principles Comparative Study

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 966 ◽  
Author(s):  
Guo ◽  
Xue ◽  
Li ◽  
Li ◽  
Song ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Transition Metal ◽  
Comparative Study ◽  
Visible Light ◽  
First Principles ◽  
Visible Spectrum ◽  
Light Sensitivity ◽  
First Principles Calculations ◽  
Metal Substitution ◽  
Transition Energies

To evaluate the influence of transition metal substituents on the characteristics of CH3NH3PbI3/TiO2, we investigated the geometrical and electronic properties of transition metal-substituted CH3NH3PbI3/TiO2 by first-principles calculations. The results suggested that the substitution of Ti4+ at the five-fold coordinated (Ti5c) sites by transition metals is energetically favored. The substituted interface has enhanced visible light sensitivity and photoelectrocatalytic activity by reducing the transition energies. The transition metal substitution can effectively tune the band gap of the interface, which significantly improves the photo-reactivity. The substituted systems are expected to be more efficient in separating the photo-generated electrons-holes and active in the visible spectrum.

scholarly journals Light exposure decreases infectivity of the Daphnia parasite Pasteuria ramosa

2020 ◽  
Vol 42 (1) ◽  
pp. 41-44 ◽  
Author(s):  
Erin P Overholt ◽  
Meghan A Duffy ◽  
Matthew P Meeks ◽  
Taylor H Leach ◽  
Craig E Williamson
Keyword(s):  
Visible Light ◽  
Light Exposure ◽  
Disease Outbreaks ◽  
Light Sensitivity ◽  
Biologically Relevant ◽  
Light Regimes ◽  
Bacterial Endospores ◽  
Pasteuria Ramosa ◽  
Aquatic Pathogens ◽  
Laboratory Exposure

Abstract Climate change is altering light regimes in lakes, which should impact disease outbreaks, since sunlight can harm aquatic pathogens. However, some bacterial endospores are resistant to damage from light, even surviving exposure to UV-C. We examined the sensitivity of Pasteuria ramosa endospores, an aquatic parasite infecting Daphnia zooplankton, to biologically relevant wavelengths of light. Laboratory exposure to increasing intensities of UV-B, UV-A, and visible light significantly decreased P. ramosa infectivity, though there was no effect of spore exposure on parasitic castration of infected hosts. P. ramosa is more sensitive than its Daphnia host to damage by longer wavelength UV-A and visible light; this may enable Daphnia to seek an optimal light environment in the water column, where both UV-B damage and parasitism are minimal. Studies of pathogen light sensitivity help us to uncover factors controlling epidemics in lakes, which is especially important given that water transparency is decreasing in many lakes.

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