α-Sulfur Crystals as a Visible-Light-Active Photocatalyst

Liu, Gang; Niu, Ping; Yin, Lichang; Cheng, Hui‐Ming

doi:10.1021/ja302897b

Cited by 431 publications

(304 citation statements)

References 23 publications

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“…The highly intense peak at 2θ of 52.7 for a d=7.14 as observed in XRD pattern of raw sulphur were found to diminish to an intensity of 200 Lin counts in processed sulphur samples [15] , and it was also observed that sulphur existed in the processed sample both in its elemental and compound forms. The change in intensity of peak in XRD pattern for processed sulphur was associated with physical rearrangement of atoms such as additional bonding to other atoms.…”

Section: Fig 3: Xrd Spectrum Of Sulphur Before Process (A) After Promentioning

confidence: 80%

Physicochemical Transformation of Sulfur during Pharmaceutical Processing in Traditional Indian Medicine

Rajalakshmy¹,

Sruthi²,

Maniyan³

et al. 2017

pharmaceutical-sciences

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Section: Fig 3: Xrd Spectrum Of Sulphur Before Process (A) After Promentioning

confidence: 80%

Physicochemical Transformation of Sulfur during Pharmaceutical Processing in Traditional Indian Medicine

Rajalakshmy¹,

Sruthi²,

Maniyan³

et al. 2017

pharmaceutical-sciences

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“…The most efficient metal-free photocatalyst is the graphitic carbon nitride (g-C 3 N 4 ). [74][75][76][77][78] For instance, Wang et al [79] reported that the carbon nitride (C 3 N 4 ) polymer can be easily modified by standard organic protocols. The copolymerization with barbituric acid was studied and realized the continuous band structure modification.…”

Section: Band Structure Engineering Through Crystal Structure Modificmentioning

confidence: 99%

Full‐Spectrum Solar‐Light‐Activated Photocatalysts for Light–Chemical Energy Conversion

Wang

Sang

et al. 2017

Advanced Energy Materials

242

116

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photocatalysis based on semiconductors represents another route for light energy conversion. This route endows the direct conversion of light energy into oxidation and reduction energy via charge carriers (electrons and holes) generated in the semiconductors. For instance, the photocatalytic degradation of harmful and toxic organic substances, dyes, and chemicals has been considered to be a suitable candidate for removing organic pollution from water, [5][6][7][8] where photooxidation dominates the degradation of the organic molecules. The full process of photocatalytic water splitting into H 2 and O 2 is believed to be promising for generating renewable and green energy, [9,10] and the process includes the photoreduction and photooxidation of water, respectively. The photocatalytic reduction of CO 2 can convert solar energy into chemical energy, stored as CH 4 , CO, CH 3 OH, etc. [11][12][13] These processes can help reduce the pressure of the global warming crisis and supply usable renewable energy. Due to the precise control of photocatalytic reduction and oxidation, photocatalytic molecular synthesis has also attracted much interest, which provides a sustainable pathway for green synthesis. [14][15][16] For an efficient photocatalytic process, solar light harvesting and a redox process based on photogenerated charge carriers are essential steps. Solar light harvesting consists of light absorption and charge carrier excitation steps, which can be expressed as the light utilization efficiency. The efficiency determines the total energy converted from solar light and is mostly determined by the band structure of the semiconductor applied to the photocatalytic process.The photocatalytic process has been extensively studied by examining the response of photocatalysts to UV light, due to its relatively high photonic energy. As is well known, UV light energy amounts to no more than 5% of the solar light energy. Visible light and near-infrared (NIR) light contain approximately 90% of the solar light energy. To utilize solar light in order to solve the environmental and energy crisis, visible light and NIR-light-activated photocatalysts are essential. For decades, many studies have focused on expanding the range over which a photocatalyst can utilize the solar light spectrum. In addition, there are several good reviews summarizing recent progress on UV-vis-light-activated photocatalysts, as well as strategies to improve the photocatalytic efficiency. [17][18][19][20] As is well known, the photonic energy of visible light is low, and that of NIR light is even lower. Photoinduced redox requires an initial amount of energy to activate the process; however, NIR photonic energy may be too low to realize photoinduced The realization of light-chemical energy conversion using solar light is an ideal goal in renewable energy studies. Many reports are concerned with extracting energy from solar light and the use/storage of the converted energy. Due to the progress in solar light absorption with various photocatalysts, the vari...

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“…This may be attributed to the surface plasmon absorption effect of Ag NPs deposited on the surface of composites [38] , which would strengthen their antibiotic capability. Fluorescence method with terephthalic acid (TA) as the probe was employed for the quantification of •OH radicals [39,40] . The unique fluorescence signal peaked at 426 nm were observed (Fig.…”

Section: Synergistic Antibacterial Mechanism Of Tio 2 /Ag Compositesmentioning

confidence: 99%

Highly synergistic antimicrobial activity of spherical and flower-like hierarchical titanium dioxide/silver composites

Cheng

et al. 2017

Journal of Colloid and Interface Science

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ABSTRACT:A spherical titanium dioxide/silver (TiO 2 /Ag) composite and a flower-like hierarchical TiO 2 /Ag composite were prepared via a template-induced method and a solvothermal method based on the Ag/Carbon spheres templates followed by calcination treatment, respectively. The morphologies of the composites were controlled by changing the concentration of reactants and calcination temperature. The antibacterial efficiency of the composites was evaluated with both Gram-negative Escherichia coli and 2 species (ROS) and silver ions were observed, which lead to superior antibacterial activities of these TiO 2 /Ag composites with a bacteriostatic rate as high as 99% even in the absence of light. The morphological effect of the composites on the antibacterial efficacy was also investigated. In addition, a durable antimicrobial coating was also fabricated by incorporating the hierarchical TiO 2 /Ag composite into a commercial emulsion solution of polyvinyl acetate, which exhibited a promising application in bacterial sensitive locations.

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α-Sulfur Crystals as a Visible-Light-Active Photocatalyst

Cited by 431 publications

References 23 publications

Physicochemical Transformation of Sulfur during Pharmaceutical Processing in Traditional Indian Medicine

Physicochemical Transformation of Sulfur during Pharmaceutical Processing in Traditional Indian Medicine

Full‐Spectrum Solar‐Light‐Activated Photocatalysts for Light–Chemical Energy Conversion

Highly synergistic antimicrobial activity of spherical and flower-like hierarchical titanium dioxide/silver composites

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