scholarly journals Materials characterization of TiO2 nanotubes decorated by Au nanoparticles for photoelectrochemical applications

RSC Advances ◽  
2021 ◽  
Vol 11 (61) ◽  
pp. 38727-38738
Author(s):  
Marcin Pisarek ◽  
Mirosław Krawczyk ◽  
Andrzej Kosiński ◽  
Marcin Hołdyński ◽  
Mariusz Andrzejczuk ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Tio2 Nanotubes ◽  
Au Nanoparticles ◽  
Materials Characterization ◽  
Analytical Measurements

The structural and chemical modification of TiO2 NTs by the deposition of a well-controlled Au deposit (0.01 mg cm−1) was investigated using a combination of microscopic (SEM, STEM), analytical measurements (XPS, SERS, UV-Vis, XRD) and photoelectrochemical investigations.

scholarly journals Preparation and Characterization of the Sulfur-Impregnated Natural Zeolite Clinoptilolite for Hg(II) Removal from Aqueous Solutions

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 217
Author(s):  
Marin Ugrina ◽  
Martin Gaberšek ◽  
Aleksandra Daković ◽  
Ivona Nuić
Keyword(s):  
Chemical Modification ◽  
Aqueous Solutions ◽  
Specific Surface ◽  
Surface Area ◽  
Natural Zeolite ◽  
Contact Time ◽  
Liquid Ratio ◽  
X Ray ◽  
Solid Liquid

Sulfur-impregnated zeolite has been obtained from the natural zeolite clinoptilolite by chemical modification with Na2S at 150 °C. The purpose of zeolite impregnation was to enhance the sorption of Hg(II) from aqueous solutions. Chemical analysis, acid and basic properties determined by Bohem’s method, chemical behavior at different pHo values, zeta potential, cation-exchange capacity (CEC), specific surface area, X-ray powder diffraction (XRPD), scanning electron microscopy with energy-dispersive X-ray analysis (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), as well as thermogravimetry with derivative thermogravimetry (TG-DTG) were used for detailed comparative mineralogical and physico-chemical characterization of natural and sulfur-impregnated zeolites. Results revealed that the surface of the natural zeolite was successfully impregnated with sulfur species in the form of FeS and CaS. Chemical modification caused an increase in basicity and the net negative surface charge due to an increase in oxygen-containing functional groups as well as a decrease in specific surface area and crystallinity due to the formation of sulfur-containing clusters at the zeolite surface. The sorption of Hg(II) species onto the sulfur-impregnated zeolite was affected by the pH, solid/liquid ratio, initial Hg(II) concentration, and contact time. The optimal sorption conditions were determined as pH 2, a solid/liquid ratio of 10 g/L, and a contact time of 800 min. The maximum obtained sorption capacity of the sulfur-impregnated zeolite toward Hg(II) was 1.02 mmol/g. The sorption mechanism of Hg(II) onto the sulfur-impregnated zeolite involves electrostatic attraction, ion exchange, and surface complexation, accompanied by co-precipitation of Hg(II) in the form of HgS. It was found that sulfur-impregnation enhanced the sorption of Hg(II) by 3.6 times compared to the natural zeolite. The leaching test indicated the retention of Hg(II) in the zeolite structure over a wide pH range, making this sulfur-impregnated sorbent a promising material for the remediation of a mercury-polluted environment.

Suitability of the Compton-to-Rayleigh ratio in X-ray fluorescence spectroscopy: hydroxyapatite-based materials characterization

2019 ◽  
Vol 34 (5) ◽  
pp. 854-859 ◽  
Author(s):  
Sofia Pessanha ◽  
Sara Silva ◽  
Luís Martins ◽  
José Paulo Santos ◽  
João M. Silveira
Keyword(s):  
Fluorescence Spectroscopy ◽  
Materials Characterization ◽  
X Ray

In this work, we established a methodology for the analysis and characterization of hydroxyapatite-based materials using X-ray fluorescence.

scholarly journals In-Situ XPS Monitoring and Characterization of Electrochemically Prepared Au Nanoparticles in an Ionic Liquid

ACS Omega ◽  
2017 ◽  
Vol 2 (2) ◽  
pp. 478-486 ◽  
Author(s):  
Merve T. Camci ◽  
Burak Ulgut ◽  
Coskun Kocabas ◽  
Sefik Suzer
Keyword(s):  
Ionic Liquid ◽  
Au Nanoparticles ◽  
In Situ Xps

Microwave Assisted Hydrothermal Synthesis and Structural Characterization of TiO2 Nanotubes

2015 ◽  
Vol 15 (9) ◽  
pp. 7391-7394 ◽  
Author(s):  
Sung Hun Cho ◽  
Rajesh Adhikari ◽  
Seung Ho Kim ◽  
Tae Ho Kim ◽  
Soo Wohn Lee
Keyword(s):  
Hydrothermal Synthesis ◽  
Structural Characterization ◽  
Tio2 Nanotubes ◽  
Microwave Assisted

scholarly journals Structural characterization of functionalized gold nanoparticles for drug delivery in cancer therapy: a NMR based approach

2015 ◽  
Vol 17 (29) ◽  
pp. 18971-18979 ◽  
Author(s):  
Sílvia C. Coelho ◽  
Maria Rangel ◽  
Maria C. Pereira ◽  
Manuel A. N. Coelho ◽  
Galya Ivanova
Keyword(s):  
Drug Delivery ◽  
Gold Nanoparticles ◽  
Cancer Therapy ◽  
Structural Characterization ◽  
Au Nanoparticles ◽  
Functionalized Gold Nanoparticles ◽  
Loaded Surface

Structure of Bortezomib loaded, surface functionalized Au nanoparticles.

Facile preparation and characterization of highly antimicrobial colloid Ag or Au nanoparticles

2008 ◽  
Vol 325 (2) ◽  
pp. 371-376 ◽  
Author(s):  
Yongwen Zhang ◽  
Huashong Peng ◽  
Wei Huang ◽  
Yongfeng Zhou ◽  
Deyue Yan
Keyword(s):  
Au Nanoparticles ◽  
Facile Preparation

scholarly journals Growth and characterization of TiO2 nanotubes from sputtered Ti film on Si substrate

2012 ◽  
Vol 7 (1) ◽  
pp. 388 ◽  
Author(s):  
Karumbaiah N Chappanda ◽  
York R Smith ◽  
Swomitra K Mohanty ◽  
Loren W Rieth ◽  
Prashant Tathireddy ◽  
...  
Keyword(s):  
Tio2 Nanotubes ◽  
Si Substrate

A review of waste-containing building materials: Characterization of the heavy metal

2021 ◽  
Vol 309 ◽  
pp. 125107
Author(s):  
Zongxian Huang ◽  
Kuisheng Liu ◽  
Jinsong Duan ◽  
Qiang Wang
Keyword(s):  
Heavy Metal ◽  
Building Materials ◽  
Materials Characterization
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