Yuwei Ma,Yan Li,Fenglong Zhang,Fei Ruan,Ruifen Wang,Guangtong Hai,Juming Liu,Jinxiao Bao
Ni directional doping in the lattice of CdS V with the Ni cations targeted linked to P (CdS V -Ni-P) was successfully synthesized via a step wise assembly method, which exhibited an excellent photocatalytic hydrogen production performance. The photoelectric performance characterization proved that the Ni directional doping and Ni cations targeted linked with P in CdS V -Ni-P not only accelerating the photo-generated electrons transfer but also decreasing efficiency of the charge recombination. The density functional theory (DFT) calculations proved that CdS V -Ni-P can also induce more charge-carriers participate in photocatalytic reaction and decrease electron binding restriction capacity. Moreover, the results of UV–vis DR spectra and VB-XPS spectra confirmed that the construction of this CdS V -Ni-P could effectively narrow the bandgap. Meanwhile, the result of Gibbs free energy demonstrated the S-H adsorption bond in CdS V -Ni-P was get weaken, which is benefit for hydrogen desorption from S sites, thus achieving a high hydrogen evolution reaction (HER) result. Based on the synergistic effects, CdS V -Ni 6.7 -P 9.6 presented a relatively high hydrogen evolution rate of 167.5 mmol h -1 g −1 under the visible light irradiation (λ ≥ 420 nm), which is almost 60 times of CdS V .
Glasses in the system xBi2O3–(100 – x)NaPO3 were prepared using transitional melting–quenching and characterized using solid state nuclear magnetic resonance (SSNMR), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FT-IR). The addition of Bi2O3 results in the depolymerization of the phosphorus chain and the formation of Q(n) (n = 0, 1, 2) phosphorus species, where n represents the number of P–O–P bonds that can be quantified using 31P magic angle spinning (MAS) NMR and constant-time double-quantum based dipolar recoupling effects nuclear alignment reduction (CT-DQ-DRENAR). The 23Na{31P}, 31P{23Na}, and XPS results consistently prove that both Na+ and Bi3+ ions are bounded by phosphorus tetrahedron [PO4]3–. Unlike other trivalent ions such as Ga3+ and Al3+, which connect with the phosphorus tetrahedron by corner-sharing, Bi3+ ions were first proved to share edge with the phosphorus tetrahedron by the analysis of 31P spectra, taking the charge balance and bond valence consideration into account. Such a difference in connectivity results in significant structural differences.
危险品化学品经营许可证（带存储）