Facile synthesis of a versatile Ti/Ti-W@PANI nanocomposite for sustainable hydrogen production under solar irradiation

Efficient Photocatalytic Charge Separation at Anatase–Hematite Heterojunctions with a Tuned Three-Dimensional Cocatalytic NiO Support

“…These proton sources employed act as sacrificial hole scavengers by donating the lone pair electrons of nitrogen and hence irreversibly reacting with the photogenerated holes of the valence band. 31,52 The photocatalytic activity in terms of the amount of hydrogen generated with respect to time was noted, and the obtained results are shown in Figure 6A. The photocatalytic activity is found to be purely photocatalytic in nature, neglecting the possibility of mechanocatalytic water splitting.…”

“…The photocatalytic activity toward hydrogen generation by water splitting reaction under visible light irradiation of all the developed materials was evaluated in the presence of the amine-based proton sources: AHA, DAH, and TAH, with a loading of 0.5% (w/v). These proton sources employed act as sacrificial hole scavengers by donating the lone pair electrons of nitrogen and hence irreversibly reacting with the photogenerated holes of the valence band. , The photocatalytic activity in terms of the amount of hydrogen generated with respect to time was noted, and the obtained results are shown in Figure A. The photocatalytic activity is found to be purely photocatalytic in nature, neglecting the possibility of mechanocatalytic water splitting.…”

“…The efficiency of semiconductor-based photocatalytic water splitting mainly depends on their VB and CB edge potentials. Accordingly, based on the following equations of E VB = X – E e + 0.5 E g and E CB = E VB – E g ,− (where E VB , E CB , X , E e , and E g are the VB potential, CB potential, electronegativity, energy of free electrons, and band gap energy, respectively), the edge potentials of the CB and VB of ternary Fe 2 O 3 , TiO 2 , and NiO are calculated and enlisted in Table S3. The Fermi levels ( E F ) of Fe 2 O 3 and TiO 2 (Fermi levels are calculated using the equation E F = E v – W , where E v is the vacuum level energy of a stationary electron; W is the work function) and the following work functions of 5.88 eV (Fe 2 O 3 ), , 4.31 eV (TiO 2 ), , and 3.24 eV (NiO) are used, and they are observed to be close to their CBs as they belong to n-type semiconductors.…”

Insight into the Fabrication and Characterization of Novel Heterojunctions of Fe2O3 and V2O5 with TiO2 and Graphene Oxide for Enhanced Photocatalytic Hydrogen Evolution: A Comparison Study

“…The electrokinetic potentials of g-FTMO and g-VTMO with metal–metal ratios of 1:2, 1:1, and 2:1 were −24.3 and −28.8 mV, −41.2 and −36.3 mV, and −42.9 and −47.5 mV, respectively. The higher negative electrokinetic potential favors a repulsion among the particles, which inhibits the agglomeration of components . Hence, in the present study, g-VTMO 2:1 and g-FTMO 2:1 show higher catalytic activity among the other composites during the photocatalytic HER.…”