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 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.

Extremely Effective Visible Light-Driven Generation of Hydrogen by Sol–Gel LaFeO3-Decorated g-C3N4 Photocatalyst

2020 ◽  
Vol 12 (11) ◽  
pp. 1255-1264
Author(s):  
Nada D. Al-Khthami ◽  
Mohammed Alsawat ◽  
Reda M. Mohamed ◽  
Yousef G. Alghamdi ◽  
Zaki I. Zaki
Keyword(s):  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Mesoporous Structure ◽  
Basic Material ◽  
Photocatalytic Ability ◽  
Visible Light Driven ◽  
Variable Content

In order to create a new design for an efficient photocatalyst, you need to decrease the obtained band gap and isolate the charge carriers photogenerated while setting up a new visible light methodology. The latter option could be accomplished via combination of catalyst in the metal oxide form over the surface of semiconductor. Hence, the current work aimed at synthesizing a new nanocomposite material from LaFeO3/g-C3N4 through the use of mesoporous silica as a template processing g-C3N4 higher surface area, which was subsequently decorated with LaFeO3. The LaFeO3 of variable content of 1∼4% was used to decorate our targeted basic material. The structure was confirmed by ordinary techniques, in addition to photocatalytic ability via splitting water reaction. g-C3N4 and LaFeO3 photocatalytic efficiencies were compared to the newly developed LaFeO3/g-C3N4 nanocomposites showing their outstanding activity. The optimum LaFeO3 content was confirmed as 3%, which gave higher photocatalytic efficiency against both g-C3N4 and LaFeO3 (34 and 21 times respectively). To enhance the catalytic system efficiency, a scavenger with a positive hole was added as glycerol. A maximum of five runs of higher efficient reuse was examined as required, as well as stable nanocomposite photocatalyst. The mesoporous structure, high surface area, and capacity of charge separation over the photocatalysis process were all investigated as main conditions which affect photocatalytic activity of LaFeO3/g-C3N4 nanocomposites.

Novel core–shell structured BiVO4 hollow spheres with an ultra-high surface area as visible-light-driven catalyst

CrystEngComm ◽  
2014 ◽  
Vol 16 (27) ◽  
pp. 6059-6065 ◽  
Author(s):  
Yang Lu ◽  
Yong-Song Luo ◽  
Hong-Mei Xiao ◽  
Shao-Yun Fu
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Surface Area ◽  
High Surface ◽  
Hollow Spheres ◽  
High Surface Area ◽  
Core Shell ◽  
Hydrothermal Route ◽  
Excellent Photocatalytic Activity ◽  
Visible Light Driven

Novel core–shell-structured BiVO4 hollow spheres synthesized via a simple hydrothermal route exhibit an excellent photocatalytic activity.

scholarly journals Visible light-induced photocatalytic degradation of gas-phase acetaldehyde with platinum/reduced titanium oxide-loaded carbon paper

RSC Advances ◽  
2017 ◽  
Vol 7 (80) ◽  
pp. 50693-50700 ◽  
Author(s):  
Soonhyun Kim ◽  
Minsun Kim ◽  
Ha-Young Lee ◽  
Jong-Sung Yu
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Gas Phase ◽  
Surface Area ◽  
Titanium Oxide ◽  
Visible Light Irradiation ◽  
High Surface ◽  
High Surface Area ◽  
Air Pollutant ◽  
Carbon Paper

A simply fabricated, high-surface-area substrate in a highly efficient photocatalyst for the degradation of air pollutant under visible light irradiation.

scholarly journals Synthesis of Superior Visible-Light-Driven Nanophotocatalyst Using High Surface Area TiO2 Nanoparticles Decorated with CuxO Particles

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 872
Author(s):  
Nezar H. Khdary ◽  
Waleed S. Alkhuraiji ◽  
Tamil S. Sakthivel ◽  
Duaa N. Khdary ◽  
Mohamed Abdel Salam ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Surface Area ◽  
Organic Pollutants ◽  
High Surface ◽  
High Surface Area ◽  
Chemically Modified ◽  
Hydroxyl Free Radical ◽  
Visible Light Driven

This work provides an alternate unique simple methodology to design and synthesize chemically modified nanophotocatalyst based on high surface area TiO2 nanoparticles that can be used efficiently for the photodegradation of organic pollutants under normal visible light rather than complicated UV irradiation. In this study, dual visible light and UV-driven nanophotocatalysts were synthesized via wet chemistry procedures using high surface area TiO2 nanoparticles functionalized with (3-Aminopropyl) trimethoxysilane and attached chemically to the CuXO to improve the charge separation and maintain the non-charge recombination. The successful modification of the TiO2 nanoparticles and the formation of the TiO2-NH2-CuxO nanophotocatalyst were confirmed using different characterization techniques, and the results revealed the synthesis of high surface area TiO2 nanoparticles, and their chemical modification with an amino group and further decoration with copper to produce TiO2-NH2-CuxO nanophotocatalyst. The photocatalytic activity of TiO2 and TiO2-NH2-CuxO nanophotocatalyst were evaluated using methylene blue (MB) dye; as an example of organic pollutants. The resulting TiO2-NH2-CuxO nanophotocatalyst exhibited superior photocatalytic activity for the degradation of MB dye under visible light irradiation, due to the reduction in the energy bandgap. The degradation of the MB dye using the TiO2-NH2-CuxO nanophotocatalyst was investigated using LC-MS, and the results revealed that the hydroxyl free radical is mainly responsible for the cleavage and the degradation of the MB dye.

scholarly journals Fabrication of CdS/Ti3C2/g-C3N4NS Z-Scheme Composites with Enhanced Visible-Light-Driven Photocatalytic Activity

2021 ◽  
Author(s):  
Ranran Zhang ◽  
Jiaying Jin ◽  
Lumeng Jia ◽  
Bo Shi ◽  
Rufen Chen
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Synthesis ◽  
Visible Light ◽  
Surface Area ◽  
High Efficiency ◽  
High Surface ◽  
High Surface Area ◽  
Photocatalytic Properties ◽  
Visible Light Driven ◽  
Redox Ability

Abstract The Ti3C2 and g-C3N4NS were obtained first, and the CdS/Ti3C2/g-C3N4NS Z-scheme composites were prepared via a facile hydrothermal synthesis and their photocatalytic properties were investigated. The g-C3N4NS with a high surface area displayed higher adsorption and degradation capacity. Compared with Ti3C2/g-C3N4NS and CdS, the optimal ternary composites exhibited significantly enhanced visible light (vis) photocatalytic activity. The Fabrication of CdS/Ti3C2/g-C3N4NS Z-scheme heterostructure not only enhanced vis absorption, but also improved the separation ability of the photoinduced e−-h+ pairs and the redox ability of the catalyst, thereby leading to the improvement of visible-light-driven photocatalytic activity. This finding provides new insights into the construction of high efficiency Z-scheme heterostructure photocatalyst.

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