diffuse reflectance ctab

diffuse reflectance ctab

A simplified method for synthesis of band-structure ...

2010-4-1 · Fig. 1 shows the diffuse reflectance spectra of (CuIn) x Zn 2(1-x) S 2 (x = 0.05, 0.1, 0.2) powders before and after added CTAB. The spectra of (CuIn) x Zn 2(1-x) S 2 without CTAB showed two steep absorption bands when x value were 0.05 and 0.1, one at 370 nm and another around 800 nm indicating that the absorption is originated from two physically mixture of ZnS

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MgO nanostructures: Synthesis, characterization and ...

2020-7-1 · In addition, the diffuse reflectance results indicate the presence of surface O 2 − with different coordinations, as well as a different concentration of defects in the samples of synthesized MgO NPs, depending on the nature of the solvent used. Specifically, taking a concentration of CTAB surfactant greater than 1 mM, mesoporous MgO was formed.

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Crystallite, optical and photocatalytic properties of ...

2009-1-8 · Fig. 4 shows diffuse reflectance spectra of various ZnIn 2 S 4 products. As shown in the spectra, their absorption onsets locate at different wavelengths, as 533 nm for ZIS-NO, 495 nm for ZIS-CTAB, 525 nm for ZIS-CPBr and 527 nm for ZIS-SDS, respectively.The band gap of ZIS-NO calculated from the onset of absorption edge is 2.33 eV, sizable shift in band gap to

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Urea and surfactant assisted hydrothermal growth of ceria ...

2020-9-20 · The UV–vis diffuse reflectance (DR) spectra were obtained using a CCE spectrophotometer (BRC112E) in the wavelength range of 250 nm–700 nm. The translucent disks of ceria powdered samples were made with KBr powder to record Fourier transform infrared (FTIR) spectra in the range of 4000–400 cm −1 using a Perkin-Elmer FTIR-2000 spectrometer.

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Fabrication of SrTiO 3 Nanocrystalline Film Photoelectrode ...

The UV-Vis diffuse reflectance analysis shows that both SrTiO 3 films that were prepared in the absence and presence of CTAB surfactant absorbs strongly in the UV region with an absorption threshold edge near 380 nm while the SiTiO3 prepared in the presence of CTAB exhibited a stronger absorption in the UV region than those in the absence of CTAB.

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Synthesis, growth mechanism, optical properties and ...

2017-5-3 · In the present study, typical ZnO microcrystals exhibiting the wurtzite hexagonal crystal structure were produced successfully, characterized by a high

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Effect of surfactant on the electrochemical performance of ...

2021-9-4 · The band-gap evaluations of both the samples were done by recording diffuse reflectance spectra, shown in Fig. 7. The optical band gap of semiconductors can be calculated using the Tauc method. Relation between energy-dependent absorption coefficient (α) and energy gap (E g) based on the assumptions from the Tauc method is expressed as follows:

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Determination of Melamine by Diffuse Reflectance ...

2021-3-13 · The analytical characteristics of the determination of melamine by diffuse reflectance spectroscopy using a mini-spectrophotometer – a monitor calibrator were evaluated. The calibration graph on the coordinates ΔF = f(с melamine, µM) was described by the equation ΔF = 0.072c (r = 0.98, S 2 ad = 0.015) and was linear in the range 3–20 ...

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Fast photocatalytic degradation of congo red using CoO ...

UV-vis diffuse reflectance spectroscopy showed a significant reduction in band gap upon increasing their CoO content, indicating incorporation of CoO in the gallia lattice. The sample containing 3 wt% CoO–Ga 2 O 3 can remove 30 ppm of congo red readily within 75 minutes and it exhibited a high photo-degradation activity of about 82.5% after ...

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Molecules | Free Full-Text | CTAB-Assisted Fabrication of ...

UV-visible diffuse reflectance spectra (DRS) were recorded on a UV-vis diffuse reflectance spectrum (Varian Cary 5000, Palo Alto, CA, USA). The Brunauer-Emmett-Teller (BET) surface area was measured using a Micrometrics ASAP

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Solution combustion synthesis of ZnO powders using

2018-5-1 · The UV–Vis diffuse reflectance spectra were recorded on a Shimadzu UV–Vis-52550 spectrophotometer in the wavelength range of 200–700 nm. Photocatalytic activity of the as-combusted ZnO powders was evaluated by degradation of methylene blue (MB) in aqueous solution under ultraviolet (UV) light radiation.

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Photocatalytic properties of solution combustion ...

2019-2-1 · UV–Vis diffuse reflectance spectra of the as-combusted ZnO powders using (a) the mixture of CTAB and glycine fuels and (b) the mixture of CTAB and citric acid fuels. PL spectra of as-combusted ZnO powders using mixed fuels at ϕ = 1 are presented in Fig. 10 .

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Cu2O nanorod thin films prepared by CBD method with

2011-6-15 · Cuprous oxide (Cu 2 O) films with different nanostructures are deposited on different substrates of fluorine-doped SnO 2 (FTO) glass, Cu and Ti foil respectively by using chemical bath deposition (CBD) technique with the presence of cetyltrimethylammonium bromide (CTAB). The samples are characterized by X-ray diffractmeter, scanning electron microscopy and

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CTAB作用下纳米复合材料ZnO-TiO2制备与多模式光催化降解 ...

The nano-composite ZnO-TiO2 under cetyhrimethyl ammonium bromide(CTAB) was prepared by the sol- gel method combined with temperature-programmed hydrothermal treatment. The phase composition, structure and morphology of the nano-composite ZnO-TiO2 (CTAB) were well-characterized by X-ray diffraction( XRD), diffuse reflectance ( UV ...

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Urea and surfactant assisted hydrothermal growth of ceria ...

2020-9-20 · The UV–vis diffuse reflectance (DR) spectra were obtained using a CCE spectrophotometer (BRC112E) in the wavelength range of 250 nm–700 nm. The translucent disks of ceria powdered samples were made with KBr powder to record Fourier transform infrared (FTIR) spectra in the range of 4000–400 cm −1 using a Perkin-Elmer FTIR-2000 spectrometer.

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Facile Cetyltrimethylammonium Bromide (CTAB)-assisted ...

2021-2-28 · The calcium bismuthate products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy and solid UV-vis diffuse reflectance spectrum. Results: The calcium bismuthate nanoflakes possess single crystalline monoclinic CaBi2O4 phase.

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Determination of Melamine by Diffuse Reflectance ...

2021-3-13 · The analytical characteristics of the determination of melamine by diffuse reflectance spectroscopy using a mini-spectrophotometer – a monitor calibrator were evaluated. The calibration graph on the coordinates ΔF = f(с melamine, µM) was described by the equation ΔF = 0.072c (r = 0.98, S 2 ad = 0.015) and was linear in the range 3–20 ...

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Synthesis and photocatalytic activity of Cu2O hollow ...

2021-12-14 · The UV-vis diffuse reflectance spectra of TiO 2-NS and H-Cu 2 O are shown in Fig. 6a and Fig. S1a, and the band gaps of TiO 2-NS and H-Cu 2 O can be calculated by the following equation: (2) αhv = A(hν - E g) n/2 where α, h, ν, E g and A are absorption coefficient, Planck constant, light frequency, band gap energy, and a constant ...

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介孔光催化剂的合成及其光催化分解水的性能 - 豆丁网 ...

2009-6-2 · 不同样品的紫外2可见漫反射吸收光谱Fi diffuse reflectance spect ra mesoporousInVO calcined 示出了紫外光照射下介孔InVO 化性能.选择700 焙烧的样品进行光催化实验, 该样品具有独特的阶梯状表面,比表面积较大且含 有对可见光响应性能良好的斜方晶型结构.

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Solution combustion synthesis of ZnO powders using

2018-5-1 · The UV–Vis diffuse reflectance spectra were recorded on a Shimadzu UV–Vis-52550 spectrophotometer in the wavelength range of 200–700 nm. Photocatalytic activity of the as-combusted ZnO powders was evaluated by degradation of methylene blue (MB) in aqueous solution under ultraviolet (UV) light radiation.

Read More
Photocatalytic properties of solution combustion ...

2019-2-1 · UV–Vis diffuse reflectance spectra of the as-combusted ZnO powders using (a) the mixture of CTAB and glycine fuels and (b) the mixture of CTAB and citric acid fuels. PL spectra of as-combusted ZnO powders using mixed fuels at ϕ = 1 are presented in Fig. 10 .

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Cu2O nanorod thin films prepared by CBD method with

2011-6-15 · Cuprous oxide (Cu 2 O) films with different nanostructures are deposited on different substrates of fluorine-doped SnO 2 (FTO) glass, Cu and Ti foil respectively by using chemical bath deposition (CBD) technique with the presence of cetyltrimethylammonium bromide (CTAB). The samples are characterized by X-ray diffractmeter, scanning electron microscopy and

Read More
Molecules | Free Full-Text | CTAB-Assisted Fabrication of ...

UV-visible diffuse reflectance spectra (DRS) were recorded on a UV-vis diffuse reflectance spectrum (Varian Cary 5000, Palo Alto, CA, USA). The Brunauer-Emmett-Teller (BET) surface area was measured using a Micrometrics ASAP

Read More
CTAB作用下纳米复合材料ZnO-TiO2制备与多模式光催化降解 ...

The nano-composite ZnO-TiO2 under cetyhrimethyl ammonium bromide(CTAB) was prepared by the sol- gel method combined with temperature-programmed hydrothermal treatment. The phase composition, structure and morphology of the nano-composite ZnO-TiO2 (CTAB) were well-characterized by X-ray diffraction( XRD), diffuse reflectance ( UV ...

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Facile Cetyltrimethylammonium Bromide (CTAB)-assisted ...

2021-2-28 · The calcium bismuthate products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy and solid UV-vis diffuse reflectance spectrum. Results: The calcium bismuthate nanoflakes possess single crystalline monoclinic CaBi2O4 phase.

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Facile Br− assisted hydrothermal synthesis of Bi2MoO6 ...

2017-9-14 · UV–Vis diffuse reflectance spectra of 150-CTAB, 150-KBr and 150F. Full size image. The separation efficiency of photo-excited electron–hole pairs is an important factor that greatly affects the photocatalytic activity of a photocatalyst.

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Facile Cetyltrimethylammonium Bromide (CTAB)-assisted ...

2021-12-7 · Title:Facile Cetyltrimethylammonium Bromide (CTAB)-assisted Synthesis of Calcium Bismuthate Nanoflakes with Solar Light Photocatalytic Performance VOLUME: 17 ISSUE: 2 Author(s):Zi Wang, Hongjun Chen, Fanglv Qiu, Zeyang Xue, Chunhu Yu, Pengxiang Wang, Qianmin Cong, Lizhai Pei*, Chuangang Fan* and Yong Zhang Affiliation:School of Materials

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(PDF) CTAB-Assisted Hydrothermal Synthesis of Bi2Sn2O7 ...

CTAB-Assisted Hydrothermal Synthesis of Bi2Sn2O7 Photocatalyst and Its Highly Efficient Degradation of Organic Dye under Visible-Light Irradiation July 2013 International Journal of

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介孔光催化剂的合成及其光催化分解水的性能 - 豆丁网 ...

2009-6-2 · 不同样品的紫外2可见漫反射吸收光谱Fi diffuse reflectance spect ra mesoporousInVO calcined 示出了紫外光照射下介孔InVO 化性能.选择700 焙烧的样品进行光催化实验, 该样品具有独特的阶梯状表面,比表面积较大且含 有对可见光响应性能良好的斜方晶型结构.

Read More