Sandwich-like P-doped h-BN/ZnIn2S4 nanocomposite with direct Z-scheme heterojunction for efficient photocatalytic H2 and H2O2 evolution

Construction of Ultrafine Ag2S NPs Anchored onto 3D Network Rodlike Bi2SiO5 and Insight into the Photocatalytic Mechanism

“…And the fitting of the O 1s spectrum showed four peaks at 532.5, 531.4, 530.3, and 529.0 eV, which were attributed to the surface-adsorbed oxygen (O ads ), defect oxygen (O v ), Bi–O, and Si–O, respectively. , After the incorporation of Ag 2 S into Bi 2 SiO 5 , the O 1s, Ag 3d, Bi 4f, S 2p, and Si 2p spectra of the ABSO 0.10 composite were similar to the corresponding spectra of the pristine Ag 2 S and virgin Bi 2 SiO 5 , except for some minor variations in the binding energies. Especially, the O 1s spectrum was fitted into four peaks corresponding to O ads , −OH, Bi–O, and Si–O, respectively. , And the position of fitting peaks from the O 1s, Ag 3d, Bi 4f, S 2p, and Si 2p spectra of the ABSO 0.10 lightly shifted (<0.5 eV) compared with those of the respective Ag 2 S and Bi 2 SiO 5 , confirming the interaction between Ag 2 S and Bi 2 SiO 5 . − …”

MOF-Derived Hollow Tubular In2O3/MIIIn2S4 (MII: Ca, Mn, and Zn) Heterostructures: Synergetic Charge-Transfer Mechanism and Excellent Photocatalytic Performance to Boost Activation of Small Atmospheric Molecules

“…By using the band gap energy obtained from Tauc’s plot (Figure S15b), the valence band (VB) potentials are calculated at 2.5, 1.2, 1.21, and 1.08 V for HT-In 2 O 3 , ZIS, MIS, and CIS nanomaterials, respectively. The measured conduction band potentials of the pristine semiconductors possess the required potentials for reduction of H + to H 2 (−0.41 V), N 2 to NH 3 (−0.36 V), and O 2 to H 2 O 2 (−0.33 V). ,, The calculated CB and VB positions w.r.t to NHE for the pure semiconductors are converted to vacuum level as shown in Table S5.…”

“…The measured conduction band potentials of the pristine semiconductors possess the required potentials for reduction of H + to H 2 (−0.41 V), N 2 to NH 3 (−0.36 V), and O 2 to H 2 O 2 (−0.33 V). 6,7,13 The calculated CB and VB positions w.r.t to NHE for the pure semiconductors are converted to vacuum level as shown in Table S5.…”

“…The photoelectron population in the CB of ZIS has sufficient potential to reduce O 2 to •O 2 − radicals (O 2 /•O 2 − : −0.33 V). 13 The produced superoxide (…”

“…Due to its great solubility in water, H 2 O 2 is considered as a model energy carrier and an effective alternative to H 2 fuel. Recently, a solar light-mediated photocatalytic technique for in situ H 2 O 2 synthesis via two-electron (2e) O 2 reduction has been proven to be a viable strategy. , The ability to build effective photocatalysts is critical to ensuring abundant H 2 O 2 generation. Therefore, it is extremely essential to fabricate high-efficiency photocatalytic materials for activation of small atmospheric molecules (H 2 O, N 2 , and O 2 ) to renewable energy and value-added products.…”