TY - JOUR

T1 - Pyrolysis conversion of metal organic frameworks to form uniform codoped C/N-Titania photocatalyst for H2 production through simulated solar light

AU - Ismail, Adel A.

AU - Al-Hajji, L. A.

AU - Alsaidi, M.

AU - Nunes, B. N.

AU - Bahnemann, D. W.

N1 - Funding Information: Kuwait Institute for Scientific Research (KISR) is gratefully acknowledged for the instrumental facilities. A. A. Ismail acknowledges the Alexander von Humboldt (AvH) Foundation for granting him a renewed research fellowship.

PY - 2021/2/15

Y1 - 2021/2/15

N2 - In this contribution, C/N-TiO2 photocatalyst has been synthesized employing the combustion approach of NH2-MIL-125(Ti) at 400 °C in air for H2 production through simulated solar light compared with either NH2-MIL-125(Ti) or commercial P-25. TEM images show well defined shape TiO2 nanocrystalline with 10 nm particles size. The obtained C/N-TiO2 photocatalyst exhibited large surface area 1066 m2 g−1 with high pore volume ∼0.537 cm3 g−1 and pores diameter ∼1.3 nm. The yield of H2 evolution over C-N/TiO2 photocatalyst (339 H2 mmol g−1) exhibited significantly compared with NH2-MIL-125(Ti) (5.7 H2 mmol g−1) and P-25 TiO2 (144.8 H2 mmol g−1) photocatalyst. The yield of H2 evolution over C/N-doped TiO2 was boosted by 60 and 2.35 times after 6 h over NH2-MIL-125(Ti) and P-25 TiO2 photocatalyst. The H2 evolution rate of C/N-TiO2 photocatalyst reached 33.3 mmol g-1 h-1 and it is greater 2.17 and 27.5 times than P-25 TiO2 (15.3 mmol g-1 h−1) and NH2-MIL-125(Ti) (1.212 mmol g-1 h−1). The enhancement of photocatalytic efficiency over C/N-TiO2 photocatalyst was referred to its great mesoporosity, hierarchical structure and large surface area. The recycled C/N-TiO2 photocatalyst showed significant durability through five consecutive runs for 30 h illumination. The C/N-TiO2, synthesized from pyrolysis of NH2-MIL-125(Ti), is proposed as an outstanding material for H2 evolution and potential photocatalysis application under simulated solar Light.

AB - In this contribution, C/N-TiO2 photocatalyst has been synthesized employing the combustion approach of NH2-MIL-125(Ti) at 400 °C in air for H2 production through simulated solar light compared with either NH2-MIL-125(Ti) or commercial P-25. TEM images show well defined shape TiO2 nanocrystalline with 10 nm particles size. The obtained C/N-TiO2 photocatalyst exhibited large surface area 1066 m2 g−1 with high pore volume ∼0.537 cm3 g−1 and pores diameter ∼1.3 nm. The yield of H2 evolution over C-N/TiO2 photocatalyst (339 H2 mmol g−1) exhibited significantly compared with NH2-MIL-125(Ti) (5.7 H2 mmol g−1) and P-25 TiO2 (144.8 H2 mmol g−1) photocatalyst. The yield of H2 evolution over C/N-doped TiO2 was boosted by 60 and 2.35 times after 6 h over NH2-MIL-125(Ti) and P-25 TiO2 photocatalyst. The H2 evolution rate of C/N-TiO2 photocatalyst reached 33.3 mmol g-1 h-1 and it is greater 2.17 and 27.5 times than P-25 TiO2 (15.3 mmol g-1 h−1) and NH2-MIL-125(Ti) (1.212 mmol g-1 h−1). The enhancement of photocatalytic efficiency over C/N-TiO2 photocatalyst was referred to its great mesoporosity, hierarchical structure and large surface area. The recycled C/N-TiO2 photocatalyst showed significant durability through five consecutive runs for 30 h illumination. The C/N-TiO2, synthesized from pyrolysis of NH2-MIL-125(Ti), is proposed as an outstanding material for H2 evolution and potential photocatalysis application under simulated solar Light.

KW - C/N-TiO

KW - H evolution

KW - NH-MIL-125(Ti)

KW - Pyrolysis

KW - Simulated solar light

UR - http://www.scopus.com/inward/record.url?scp=85097048845&partnerID=8YFLogxK

U2 - 10.1016/j.jphotochem.2020.113037

DO - 10.1016/j.jphotochem.2020.113037

M3 - Article

AN - SCOPUS:85097048845

VL - 407

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

SN - 1010-6030

M1 - 113037

ER -