Loading...
Please wait, while we are loading the content...
Similar Documents
g-C3N4/(Cu/TiO2) nanocomposite for enhanced photoreduction of CO2 to CH3OH and HCOOH under UV/visible light
| Content Provider | Semantic Scholar |
|---|---|
| Author | Adekoya, David Tahir, Muhammad Amin, Nor Aishah Saidina |
| Copyright Year | 2017 |
| Abstract | Abstract Cu-modified graphitic carbon nitride (g-C 3 N 4 ) and titanium dioxide (TiO 2 ) nanocomposites for enhanced photocatalytic CO 2 reduction with H 2 O under UV and visible light irradiations have been investigated. The photocatalysts, prepared by pyrolysis and impregnation were characterized by XRD, FE-SEM, TEM, FT-IR, N 2 adsorption-desorption, XPS, UV–vis DRS and PL spectroscopy. The Cu-metal loaded over TiO 2 and g-C 3 N 4 enhanced CO 2 reduction efficiency to CH 3 OH and HCOOH by fostering carrier charge separation. The Cu-metal in the composite as well as the wt.% ratio of g-C 3 N 4 and TiO 2 also influenced the photoactivity and products selectivity. The low band gap, electronic structure and visible light absorption capacity of g-C 3 N 4 facilitated the transfer of photo-generated electrons to Cu/TiO 2 in the composite. Moreover, the position of the metal in the composite affected the electrons distribution and hence enhanced the photoactivity. The maximum yield of the products detected under visible light were 2574 and 5069 μmol/g.cat of CH 3 OH and HCOOH, respectively. The yield of CH 3 OH under visible light was four fold higher compared to UV-light irradiation. The ratio (30:70) of g-C 3 N 4 and Cu/TiO 2 in the composite and the use of visible light improved the efficiency of the photocatalytic system. The stability of the photocatalyst prevailed in continuous CH 3 OH production under visible light irradiation compared to UV-light in cyclic runs. Possible reaction mechanisms were proposed to understand the movement of electrons and holes and the function of both UV and visible light for CO 2 reduction over the g-C 3 N 4 /TiO 2 (30:70) photocatalyst. |
| Starting Page | 261 |
| Ending Page | 274 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jcou.2017.02.004 |
| Volume Number | 18 |
| Alternate Webpage(s) | https://people.utm.my/noraishah/files/2017/05/gC3N4.CuTiO2-nanocomposite-for-enhanced-photoreduction-of-CO2.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jcou.2017.02.004 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
