NH2-MIL-125(Ti) doped CdS/Graphene composite as electro and photo catalyst in basic medium under light irradiation

Ravi Nivetha; Kannan Gothandapani; Vimala Raghavan; George Jacob; Raja Sellapan; A M Kannan; Sudhagar Pitchaimuthu; Saravanan Pandiaraj; Aljawhara H Almuqrin; Abdullah Alodhayb; Muthumareeswaran Muthuramamoorthy; Quyet Van Le; Soon Kwan Jeong; Andrews Nirmala Grace

doi:10.1016/j.envres.2021.111719

NH₂-MIL-125(Ti) doped CdS/Graphene composite as electro and photo catalyst in basic medium under light irradiation

Environ Res. 2021 Sep:200:111719. doi: 10.1016/j.envres.2021.111719. Epub 2021 Jul 20.

Authors

Affiliations

¹ Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore, Tamil Nadu, India.
² Ira A. Fulton Schools of Engineering, Arizona State University, USA.
³ Research Centre for Carbon Solutions, Institute of Mechanical and Processing Engineering, School of Engineering & Physical Science, Heriot-Watt University Edinburgh, EH14 4AS, United Kingdom.
⁴ Department of Self Development Skills, CFY Deanship, King Saud University, Riyadh, Saudi Arabia.
⁵ Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia.
⁶ Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
⁷ King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, 11451, Saudi Arabia.
⁸ Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam.
⁹ Climate Change Technology Research Division, Korea Institute of Energy Research, Yuseong-gu, Daejeon, 305-343, South Korea. Electronic address: jeongsk@kier.re.kr.
¹⁰ Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore, Tamil Nadu, India. Electronic address: anirmalagladys@gmail.com.

PMID: 34293309
DOI: 10.1016/j.envres.2021.111719

Abstract

The development of active electrocatalysts and photocatalysts for hydrogen evolution reaction (HER) and for environmental remediation is a huge challenge. Research is still underway on the development of low-cost catalytic materials with appreciable efficiency for HER. In the present study, a composite of metal organic framework (MOF) with CdS and graphene (NH₂-MIL-125(Ti)/CdS-graphene) composites were developed with different loadings of graphene material via solvothermal technique. Further the electrocatalytic activity of the synthesized catalysts were investigated for HER and photocatalytic degradation of dye. Results show that the synthesized catalyst with a less amount of graphene was more active. HER results showed a less Tafel slope of 70.8 and 61.9 mVdec^-1 with 15.6 mA/cm² and 15.46 mA/cm² current densities under light on and off conditions. Further the dye degradation activity of the synthesized catalysts was tested with Rhodamine B dye and results showed that the catalyst showed excellent activity for low weight loading of graphene with a degradation efficiency of 95 % and followed pseudo first order kinetic model. Overall results showed that the synthesized composites are promising for HER and photocatalytic applications.

Keywords: Hydrogen evolution reaction (HER); NH(2)-MIL-125(Ti)/CdS/Graphene; Photocatalysis; Rhodamine-B.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Graphite*
Light
Titanium*

Substances

Graphite
Titanium