NaTi₂(PO₄)₃ (NTP) has open three-dimensional (3D) ion channels and a high theoretical capacity, but its inherent low electronic conductivity and poor structural stability impede practical applications. Meanwhile, the desalination mechanism of NTP in capacitive deionization (CDI) remains unclear, and the form of ion intercalation conversion is still ambiguous. Herein, we present an electron/ion transport-enhanced strategy for fabricating self-supporting electrodes via constructing an interlaced 3D network, which establishes interconnected channels for rapid electron/ion transfer and diffusion while simultaneously enhancing structural durability and mechanical robustness. The NTP combined with carbon nanofibers (NTP/CNF) composite electrode exhibits excellent salt adsorption capacity (83.9 mg·g⁻¹), fast salt adsorption rate (7.5 mg·g⁻¹·min⁻¹), and cycling stability. Furthermore, the desalination mechanism of the NTP/CNF electrode during the CDI process was revealed through ex-situ X-ray diffraction (XRD) patterns, Raman spectra, and X-ray photoelectron spectroscopy (XPS) spectra, clarifying the transition from a sodium-deficient phase (NaTi₂(PO₄)₃) to a sodium-rich phase (Na₃Ti₂(PO₄)₃).

Bi₂MoO₆ is modified by rare earth ions (RE³⁺=Tb³⁺, Sm³⁺) for solving the problem of poor electron-hole pair separation efficiency of Bi₂MoO₆ in the photocatalytic reaction process. A series of Tb³⁺ and Sm³⁺ doped Bi₂MoO₆ photocatalysts were synthesized by the solvothermal method and named RE³⁺/Bi₂MoO₆ (RE³⁺=Tb³⁺, Sm³⁺). The composition, structure and morphology of the RE³⁺/Bi₂MoO₆ material were characterized by various analytical means. The photocatalytic activity of the samples was investigated by using the organic dye rhodamine B (RhB) as a simulated pollutant under visible light. The results show that the doping of rare earth Tb³⁺ and Sm³⁺ ions increases the specific surface area of the sample, optimizes the energy band structure, expands the visible light absorption range, and improves the separation efficiency of photogenerated electron-hole pairs. The photodegradation rates of 4% Tb³⁺/Bi₂MoO₆ and 4% Sm³⁺/Bi₂MoO₆ samples in 50 mL 10 mg/L RhB reached more than 95% under visible light, which are nearly two times higher than that of the pure Bi₂MoO₆.