TY - JOUR
T1 - Z-scheme photocatalytic dye degradation on AgBr/Zn(Co)Fe2O4 photocatalysts supported on nitrogen-doped graphene
AU - Chnadel, N.
AU - Dutta, V.
AU - Sharma, S.
AU - Raizada, P.
AU - Sonu,
AU - Hosseini-Bandegharaei, A.
AU - Kumar, R.
AU - Singh, P.
AU - Thakur, V. K.
PY - 2020/9
Y1 - 2020/9
N2 - In this work, we have synthesized AgBr-modified cobalt ferrite (CF) and zinc ferrite (ZF) combined with N-doped graphene (NG) via a modified hydrothermal process. Exploiting visible light, the photocatalytic performance of as-fabricated photocatalysts were used for successful photocatalytic degradation of malachite green (MG) and methyl orange (MO). The photodegradation of MG after 100 min followed the trend AgBr/CF/NG (98%) > AgBr/ZF/NG (95%) > CF (45%) > ZF (43%) > AgBr (41%) > NG (21%). For the degradation of MO, the abolition efficiency after 100 min followed the trend AgBr/CF/NG (99%) > AgBr/ZF/NG (96%) > CF (41%) > AgBr (40%) > ZF (38%) > > NG (23%). The rate constants of 0.034 and 0.032 min−1 were attained for MG degradation using AgBr/CF/NG (R2, 0.99) and AgBr/ZF/NG (R2: 0.98) photocatalyst, respectively, whereas AgBr/ZF/NG (R2: 0.98) and AgBr/CF/NG (R2: 0.97) had respective rate constants of 0.029 and 0.026 min−1 for MO photodegradation. The intermediate formation during the process of photodegradation was studied by HPLC and GC-MS analysis. The adsorption experiments demonstrated that maximum adsorption of MG was at pH 4, whereas the maximum MG adsorption was at pH 8. Owning to recycle experiments, AgBr/ZF/NG and AgBr/CF/NG revealed 85% and 83% degradation efficiency, respectively, after ten consecutive cycles.
AB - In this work, we have synthesized AgBr-modified cobalt ferrite (CF) and zinc ferrite (ZF) combined with N-doped graphene (NG) via a modified hydrothermal process. Exploiting visible light, the photocatalytic performance of as-fabricated photocatalysts were used for successful photocatalytic degradation of malachite green (MG) and methyl orange (MO). The photodegradation of MG after 100 min followed the trend AgBr/CF/NG (98%) > AgBr/ZF/NG (95%) > CF (45%) > ZF (43%) > AgBr (41%) > NG (21%). For the degradation of MO, the abolition efficiency after 100 min followed the trend AgBr/CF/NG (99%) > AgBr/ZF/NG (96%) > CF (41%) > AgBr (40%) > ZF (38%) > > NG (23%). The rate constants of 0.034 and 0.032 min−1 were attained for MG degradation using AgBr/CF/NG (R2, 0.99) and AgBr/ZF/NG (R2: 0.98) photocatalyst, respectively, whereas AgBr/ZF/NG (R2: 0.98) and AgBr/CF/NG (R2: 0.97) had respective rate constants of 0.029 and 0.026 min−1 for MO photodegradation. The intermediate formation during the process of photodegradation was studied by HPLC and GC-MS analysis. The adsorption experiments demonstrated that maximum adsorption of MG was at pH 4, whereas the maximum MG adsorption was at pH 8. Owning to recycle experiments, AgBr/ZF/NG and AgBr/CF/NG revealed 85% and 83% degradation efficiency, respectively, after ten consecutive cycles.
KW - AgBr
KW - Dye degradation
KW - Fast recovery of photocatalysts
KW - Supported photocatalysis
KW - Z-scheme approach
KW - ZnFeO and CoFeO
UR - https://www.scopus.com/pages/publications/85087388421
U2 - 10.1016/j.mtsust.2020.100043
DO - 10.1016/j.mtsust.2020.100043
M3 - Article
AN - SCOPUS:85087388421
SN - 2589-2347
VL - 9
JO - Materials Today Sustainability
JF - Materials Today Sustainability
M1 - 100043
ER -
