Visible light enhanced removal of a sulfur mustard gas surrogate from a vapor phase on novel hydrous ferric oxide/graphite oxide composites

2015 ◽  
Vol 3 (1) ◽  
pp. 220-231 ◽  
Author(s):  
Javier A. Arcibar-Orozco ◽  
Teresa J. Bandosz
Keyword(s):  
Visible Light ◽  
Vapor Phase ◽  
Graphite Oxide ◽  
Ferric Oxide ◽  
Sulfur Mustard ◽  
High Surface ◽  
High Surface Area ◽  
Hydrous Ferric Oxide ◽  
Mustard Gas ◽  
Oxide Composites

High surface area composites consisting of iron oxyhydroxides and graphite oxide/aminated graphite oxide are efficient media for adsorption/decontamination of a mustard gas surrogate (CEES).

High Surface Area SnO2 -Ta2 O5 Composite for Visible Light-driven Photocatalytic Degradation of an Organic Dye

2018 ◽  
Vol 94 (4) ◽  
pp. 633-640 ◽  
Author(s):  
Bharath Velaga ◽  
Pradeep P. Shanbogh ◽  
Diptikanta Swain ◽  
Chandrabhas Narayana ◽  
Nalini G. Sundaram
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Organic Dye ◽  
Visible Light Driven

scholarly journals The synthesis of a BiOClxBr1−x nanostructure photocatalyst with high surface area for the enhanced visible-light photocatalytic reduction of Cr(vi)

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4763-4771 ◽  
Author(s):  
Muhammad Bilal Hussain ◽  
Malik Saddam Khan ◽  
Herman Maloko Loussala ◽  
Muhammad Sohail Bashir
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
Room Temperature ◽  
High Surface ◽  
High Surface Area ◽  
Photocatalytic Reduction ◽  
Synthetic Process ◽  
Visible Light Photocatalytic

Cr(vi) reduction is performed by BiOCl0.8Br0.2 composite produced via a facile in situ synthetic process at room temperature while making use of PVP (Mw = 10 000).

Cr Doped TiO2 Supported on TUD-1 Photocatalyst for Dye Photodegradation

2014 ◽  
Vol 69 (5) ◽  
Author(s):  
Ooi Yee Khai ◽  
Leny Yuliati ◽  
Siew Ling Lee
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Xrd Analysis ◽  
Bandgap Energy ◽  
Doped Tio2 ◽  
Visible Light Driven ◽  
Synthesized Materials

New visible light driven photocatalysts of 1 mol% Cr doped TiO2 supported on TUD-1 have been successfully synthesized. The Cr-TiO2/xTUD-1 (x = 10, 20, 30, 40 and 50) photocatalysts were prepared via surfactant-free sol-gel method followed by wet impregnation procedures. XRD analysis revealed that both TiO2 and Cr were incorporated in the highly porous siliceous matrix. FTIR analysis showed the existence of Si-O-Ti in all the materials. As observed, tetrahedral-coordinated Ti species were dominant in Cr-TiO2/10TUD-1, Cr-TiO2/20TUD-1 and Cr-TiO2/30TUD-1. Meanwhile, octahedral- coordinated Ti species were the dominant species in Cr-TiO2/40TUD-1 and Cr-TiO2/50TUD-1. It has been demonstrated that the amount of TUD-1 as photocatalyst support affected the wavelength response and the bandgap energy of the resulting materials. All the materials have bandgap energy of ~2.9 eV. The photocatalytic performance of the synthesized materials was tested out in dye photodegradation under visible light irradiation at 298 K for 5 hours. Results showed that all Cr-TiO2/TUD-1 materials had higher photocatalytic activity than that of Cr-TiO2. This could be explained by the high surface area and porosity provided by TUD-1 in enhancing the adsorption and diffusivities of the dye molecules, hence leading to the promising photocatalytic activity. Among the materials prepared, Cr-TiO2/30TUD-1 appeared as the most superior photocatalyst which gave the highest dye photodegradation.

scholarly journals Synthesis of a high-surface area V2O5/TiO2–SiO2 catalyst and its application in the visible light photocatalytic degradation of methylene blue

RSC Advances ◽  
2019 ◽  
Vol 9 (42) ◽  
pp. 24368-24376 ◽  
Author(s):  
Ajay Kumar Adepu ◽  
Srinath Goskula ◽  
Suman Chirra ◽  
Suresh Siliveri ◽  
Sripal Reddy Gujjula ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Bet Surface Area ◽  
Titanium Silicate ◽  
Ft Ir ◽  
Synthesized Materials ◽  
Visible Light Photocatalytic

In the present study, we synthesized several high-surface area V2O5/TiO2–SiO2 catalysts (vanado titanium silicate, VTS). The synthesized materials are characterized by PXRD, FE-SEM/EDAX, TEM, BET-surface area, FT-IR, UV-Vis, XPS, fluorescence and photocatalytic studies.

Modulating interleaved ZnO assembly with CuO nanoleaves for multifunctional performance: perdurable CO2 gas sensor and visible light catalyst

2017 ◽  
Vol 4 (11) ◽  
pp. 1848-1861 ◽  
Author(s):  
Shravanti Joshi ◽  
Ram Kumar C. B. ◽  
Lathe A. Jones ◽  
Edwin L. H. Mayes ◽  
Samuel J. Ippolito ◽  
...  
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Gas Detection ◽  
Visible Light Photocatalysis ◽  
Co2 Gas ◽  
Co2 Gas Sensor ◽  
Catalytic Role

Efficient CO2 gas detection and visible light photocatalysis performance shown by interleaved CuO/ZnO heterostructures ascribed primarily to the high surface area, p/n nano-interfaces and catalytic role of Ag.

scholarly journals Synthesis of V2O5 Nanoflakes on PET Fiber as Visible-Light-Driven Photocatalysts for Degradation of RhB Dye

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yim-Leng Chan ◽  
Swee-Yong Pung ◽  
Srimala Sreekantan
Keyword(s):  
Visible Light ◽  
Uv Light ◽  
High Surface ◽  
Research Work ◽  
High Surface Area ◽  
Order Kinetic ◽  
Polymeric Fibers ◽  
Photodegradation Efficiency ◽  
Continuous Flow Condition ◽  
Visible Light Driven

The visible-light-driven semiconductor photocatalysts are the current research focus techniques used to decompose organic pollutants/compounds. The photodegradation efficiency of organic compounds by photocatalyst is expected to be better compared to UV-light-driven semiconductor photocatalysts technique since the major components of our solar energy are visible light (~44%). However, as most of the previous research work has been carried out using semiconductor photocatalysts in the form of powder, extra steps and costs are needed to remove this powder from the slurry to prevent secondary pollution. In this research work, we will explain our fabrication technique of V2O5 nanoflakes by growing radially on PET fibers. By utilizing the flexibility and high surface area of polymeric fibers as novel substrate for the growth of V2O5 nanoflakes, the Rhodamine B (RhB) could be degraded under visible light irradiation. The photodegradation of RhB solution by V2O5 nanoflakes followed the 1st order kinetic with a constant rate of 0.0065 min−1. The success of this research work indicates that V2O5 nanoflakes grown on PET fibre could be possibly used as organic waste water purifier under continuous flow condition. A photodegradation mechanism of V2O5 nanostructures to degrade RhB dye is proposed based on the energy diagram.

Vapor phase organic chemistry to deposit conjugated polymer films on arbitrary substrates

2017 ◽  
Vol 5 (23) ◽  
pp. 5787-5796 ◽  
Author(s):  
Nongyi Cheng ◽  
Lushuai Zhang ◽  
Jae Joon Kim ◽  
Trisha L. Andrew
Keyword(s):  
Organic Chemistry ◽  
Surface Area ◽  
Vapor Phase ◽  
Polymer Films ◽  
Conjugated Polymer ◽  
High Surface ◽  
High Surface Area

Coating textured, high surface area substrates, such as paper and textiles, with conjugated polymer films is challenging.

scholarly journals A Novel N-Doped Nanoporous Bio-Graphene Synthesized from Pistacia lentiscus Gum and Its Nanocomposite with WO3 Nanoparticles: Visible-Light-Driven Photocatalytic Activity

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6569
Author(s):  
Maryam Afsharpour ◽  
Mehdi Elyasi ◽  
Hamedreza Javadian
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Nanoporous Structure ◽  
Pistacia Lentiscus ◽  
Nitrogen Doped ◽  
Visible Light Driven ◽  
Ft Ir ◽  
Natural Carbon

This paper reports the synthesis of a new nitrogen-doped porous bio-graphene (NPBG) with a specific biomorphic structure, using Pistacia lentiscus as a natural carbon source containing nitrogen that also acts as a bio-template. The obtained NPBG demonstrated the unique feature of doped nitrogen with a 3D nanoporous structure. Next, a WO3/N-doped porous bio-graphene nanocomposite (WO3/NPBG-NC) was synthesized, and the products were characterized using XPS, SEM, TEM, FT-IR, EDX, XRD, and Raman analyses. The presence of nitrogen doped in the structure of the bio-graphene (BG) was confirmed to be pyridinic-N and pyrrolic-N with N1 peaks at 398.3 eV and 400.5 eV, respectively. The photocatalytic degradation of the anionic azo dyes and drugs was investigated, and the results indicated that the obtained NPBG with a high surface area (151.98 m2/g), unique electronic properties, and modified surface improved the adsorption and photocatalytic properties in combination with WO3 nanoparticles (WO3-NPs) as an effective visible-light-driven photocatalyst. The synthesized WO3/NPBG-NC with a surface area of 226.92 m2/g displayed lower bandgap and higher electron transfer compared with blank WO3-NPs, leading to an increase in the photocatalytic performance through the enhancement of the separation of charge and a reduction in the recombination rate. At the optimum conditions of 0.015 g of the nanocomposite, a contact time of 15 min, and 100 mg/L of dyes, the removal percentages were 100%, 99.8%, and 98% for methyl red (MR), Congo red (CR), and methyl orange (MO), respectively. In the case of the drugs, 99% and 87% of tetracycline and acetaminophen, respectively, at a concentration of 10 mg/L, were removed after 20 min.

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