One new copper iodide coordination polymer directed by 4-pyridyl dithioether ligand: Syntheses, structures, and photocatalysis

2020 ◽  
Vol 19 (3) ◽  
pp. 217-225
Author(s):  
Gui-Ying Qiao ◽  
Su-Min Li ◽  
Yun-Yin Niu
Keyword(s):  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectrum ◽  
Monoclinic Space Group ◽  
Copper Iodide ◽  
Tetrahedral Configuration ◽  
X Ray ◽  
Uv Visible ◽  
Dithioether Ligand ◽  
Visible Diffuse Reflectance Spectrum

One new compound consisting of 1,1-bis(4-pyridylthio)methylene ([Bpytm]) ligand, namely [Bpytm]CuI (1), has been prepared and characterized by IR spectroscopy, solid Uv-visible diffuse reflectance spectrum, and X-ray Powder Diffraction (PXRD). Compound 1 is a 2D MOF and ligand [Bpytm] coordinate with metal ions to form tetrahedral configuration. For compound 1: Crystal system: Monoclinic, Space group: C2/c, a = 13.6671(11), b = 11.6075(11), c = 17.1225(12), α= 90°, β= 93.707(3)°, γ= 90°, V = 2710.6(4) Å3, Z = 8, Dcalc = 2.082 g cm–3. The photocatalytic properties and thermal stability have been researched.

Quantification of hematite from the visible diffuse reflectance spectrum: effects of aluminium substitution and grain morphology

Clay Minerals ◽  
2011 ◽  
Vol 46 (1) ◽  
pp. 137-147 ◽  
Author(s):  
Q. S. Liu ◽  
J. Torrent ◽  
V. Barrón ◽  
Z. Q. Duan ◽  
J. Bloemendal
Keyword(s):  
Mass Concentration ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectrum ◽  
Grain Morphology ◽  
Characteristic Absorption Band ◽  
Chinese Loess ◽  
Al Substitution ◽  
Soils And Sediments ◽  
Visible Diffuse Reflectance Spectrum

AbstractHematite exists ubiquitously in soils and sediments, and is commonly aluminium (Al)-substituted. This study investigated systematically the effects of Al substitution on the visible diffuse reflectance spectrum (DRS) of hematite by using several sets of synthetic samples. We found that the position and amplitude of the characteristic absorption band of hematite (estimated from the first- and second-order derivative curves of the Kubelka-Munk remission function spectrum derived from the DRS) was significantly affected by the degree of Al substitution as well as by sample grain morphology. Therefore, there are ambiguities in quantifying the degree of Al substitution and the mass concentration of hematite using DRS. Nevertheless, if hematite forms under similar environmental conditions, it is possible to establish a transfer function between the DRS parameters and hematite concentration as discussed here for a Chinese loess-palaeosol sequence.

A neodymium tetra(4-sulfonatophenyl)porphyrin with a flexible three-dimensional framework

2018 ◽  
Vol 22 (04) ◽  
pp. 325-330 ◽  
Author(s):  
Rong-Hua Hu ◽  
Cai Yi ◽  
Yao Li ◽  
Zhuan-Xia Zhang ◽  
Long-Zhen Lin ◽  
...  
Keyword(s):  
Diffuse Reflectance ◽  
Optical Band Gap ◽  
Reflectance Spectrum ◽  
Magnetic Measurements ◽  
Variable Temperature ◽  
Diffuse Reflectance Spectrum ◽  
Three Dimensional ◽  
Solvothermal Reaction ◽  
Single Crystal Diffraction ◽  
X Ray

A novel neodymium porphyrin [Nd(TPPS)][Formula: see text]•[Formula: see text]H[Formula: see text]O (1) [H[Formula: see text]TPPS [Formula: see text] tetra(4-sulfonatophenyl)porphyrin] has been prepared through a solvothermal reaction and characterized by the X-ray single-crystal diffraction technique. Complex 1is crystallized in the [Formula: see text]4/mcc space group of the tetragonal system. Complex 1 features a three-dimensional (3D) open framework with the pore size of the channels being of 6.9 [Formula: see text] × 8.2 [Formula: see text]. A wide optical band gap of 4.98 eV is revealed by the solid-state UV/vis diffuse reflectance spectrum. The variable-temperature magnetic susceptibility obeys the Curie-Weiss law ([Formula: see text]/([Formula: see text] with [Formula: see text] 0.67 K and a negative Weiss constant [Formula: see text] -0.37 K as found by the magnetic measurements, suggesting the existence of an antiferromagnetic behavior. The N[Formula: see text] adsorption and desorption curves show good reversibility and verify that the 3-D framework is flexible and can be compressed with the increasing pressure.

Synthesis of SnS2/SnO2 Nanocomposite for Visible Light-Driven Photocatalytic Reduction of Aqueous Cr(VI)

2013 ◽  
Vol 538 ◽  
pp. 46-49 ◽  
Author(s):  
Min Yang ◽  
Yong Cai Zhang ◽  
Wei Min Dai ◽  
Ke Hang ◽  
Yue Quan Pan
Keyword(s):  
Visible Light ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Sno2 Nanoparticles ◽  
Diffuse Reflectance Spectrum ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Light Driven

SnS2/SnO2 nanocomposite was synthesized by a simple in situ hydrothermal oxidation route, and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy and UV-vis diffuse reflectance spectrum. The as-synthesized SnS2/SnO2 nanocomposite displayed much superior photocatalytic activity to SnS2 and SnO2 nanoparticles in the reduction of aqueous Cr(VI) under visible light (λ > 420 nm) irradiation.

Self-assembly and photocatalytic property of a new inorganic-organic hybrid material based on 1,4-bis(4-pyridylthio)butane

2020 ◽  
Vol 19 (3) ◽  
pp. 227-235
Author(s):  
Yan-Qi Lu
Keyword(s):  
Self Assembly ◽  
Diffuse Reflectance Spectrum ◽  
Photocatalytic Property ◽  
Chain Structure ◽  
Monoclinic Space Group ◽  
Hybrid Compound ◽  
Organic Hybrid ◽  
Uv Visible ◽  
Degradation Effect ◽  
Visible Diffuse Reflectance Spectrum

A new hybrid compound consisting of 1,4-bis(4-pyridylthio)butane ([Bpytb]) ligand, namely {[Bpytb]Ag2I3}n (1), has been prepared and characterized by IR spectroscopy, solid UV-visible diffuse reflectance spectrum, X-ray Powder Diffraction (PXRD) and TG. Compound 1 consists of 1D anion chain structure. Crystal system: Monoclinic, Space group: P2/c, a = 4.5092(3), b = 11.1895(9), c = 21.3893(14), α= 90°, β= 92.907(2)°, γ= 90°, V = 1077.82(13) Å3, Z = 2, Dcalc = 2.693 g cm–3. The photocatalytic property of compound 1 was also studied and it exhibits a better degradation effect on organic dye MB.

New Titanium Oxide Compound for Photocatalytic Water Splitting, Hydrous Na16Ti10O28

2009 ◽  
Vol 421-422 ◽  
pp. 546-549
Author(s):  
Sae Nakajima ◽  
Soihiro Watanabe ◽  
Kazuyoshi Uematsu ◽  
Tadashi Ishigaki ◽  
Kenji Toda ◽  
...  
Keyword(s):  
Water Splitting ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectrum ◽  
H2 Evolution ◽  
X Ray Diffraction ◽  
Oxide Compound ◽  
Co Catalyst ◽  
X Ray ◽  
Scanning Electron

Photochemical splitting of water into H2 and O2 using solar energy is process of great economic and environmental interest. In this study, we investigated novel photocatalytic compound, Na16Ti10O28, for water splitting. Na16Ti10O28 was prepared by solid-state reaction at 900 oC for 1 h. Prepared sample was characterized using powder X-ray diffraction, diffuse reflectance spectrum, and scanning electron microscopy. As-prepared Na16Ti10O28 sample is easily hydrated in water. Hydrous Na16Ti10O28 showed H2 evolution without co-catalyst.

Diffuse Reflectance Spectrum of Ferric Oxide

1970 ◽  
Vol 3 (11-12) ◽  
pp. 297-301 ◽  
Author(s):  
S. P. Tandon ◽  
J. P. Gupta
Keyword(s):  
Ferric Oxide ◽  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Diffuse Reflectance Spectrum

scholarly journals Preparation and Characterizations of In0.1SnxZn0.85-2xS Powder Photocatalysts for Hydrogen Production under Visible Light Irradiation

2011 ◽  
Vol 364 ◽  
pp. 238-242 ◽  
Author(s):  
Kimi Melody ◽  
Yuliati Leny ◽  
Mustaffa Shamsuddin
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Solid Solutions ◽  
Visible Light Irradiation ◽  
Diffuse Reflectance ◽  
Average Rate ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Visible

A series of In0.1SnxZn0.85-2xS solid solutions was synthesized by hydrothermal method and employed as photocatalyst for photocatalytic hydrogen evolution under visible light irradiation. The structures, optical properties and morphologies of the solid solutions were studied by X-ray diffraction, diffuse reflectance UV–visible spectroscopy and field emission scanning electron microscopy. From the characterizations, it was confirmed that In0.1SnxZn0.85-2xS solid solution can be obtained and they have nanosized particles. The highest photocatalytic activity was observed on In0.1Sn0.03Zn0.79S photocatalyst, with average rate of hydrogen production 3.05 mmol/h, which was 1.2 times higher than the In0.1Zn0.85S photocatalyst.

Sensing Nanoparticulate ZnO with Benzimidazole Derivative by Fluorescence

2013 ◽  
Vol 543 ◽  
pp. 63-67
Author(s):  
Jayabharathi Jayaraman ◽  
Jayamoorthy Karunamoorthy
Keyword(s):  
Diffuse Reflectance ◽  
Electrochemical Impedance ◽  
Fluorescent Sensor ◽  
Sol Gel ◽  
Benzimidazole Derivative ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Visible ◽  
Doped Zno ◽  
Scanning Electron

A sensitive benzimidazole derivative fluorescent sensor for nanoparticulate ZnO has been designed and synthesized. The nanocrystalline ZnO, Ag doped ZnO and Cu doped ZnO have been synthesised by sol-gel method and characterized by powder X-ray diffraction, scanning electron microscopy (SEM) and UV-visible diffuse reflectance, photoluminescence and electrochemical impedance spectroscopies. The synthesized sensor emits fluorescence at 360 nm and this fluorescence is selectively enhanced by nanocrystalline ZnO. This technique is sensitive to detect and estimate ZnO at micro molar level. Impurities such as Ag and Cu do not hamper the sensitivity of this technique significantly. Keywords: Sensor, SEM, EDX, Impedance, Fluorescence

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