An MOC-based cascade nanozyme with relatively definite structures was developed and it scavenged ROS to alleviate renal I/R injury.

In the present work, the direct preparation of Cu-doped ZnSe quantum dots (ZnSe:Cu QDs) via hydrothermal route using L-glutathione (GSH) as a stabilizer was investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV-vis absorption, and photoluminescence (PL) emission spectroscopies. Structural investigations indicated that the GSH capping ZnSe:Cu QDs were about 3 nm in size, showing size-dependent optical properties of the prepared QDs. The as-synthesized ZnSe:Cu QDs were observed to emit green fluorescence at 468 nm when excited at 321 nm. The effect of the several experimental factors was surveyed and the optimum conditions was found to be: hydrothermal time, 60 min; pH of reaction solution, 10.5; molar ratio of GSH-to-Zn, 1.2; Cu²⁺ doping amount, 5%.

Compact MnCoS thin films on a nickel foam (NF) substrate were prepared by successive ionic layer adsorption and a reaction (SILAR) method, and two surfactants (SDS and CTAB) were used to improve the wettability of the NF. The MnCoS thin films were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The supercapacitive properties were evaluated by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and impedance spectroscopy (EIS). The results show that while the NF was first dipped in surfactant solution, followed by a mixture of Mn²⁺ and Co²⁺ or a Na₂S solution, the load and density of the MnCoS on the NF’s surface significantly increased and delivered a much higher specific capacitance than that of the MnCoS thin film formed without the assistance of surfactants, which were 2029.8 F g⁻¹ (MnCoS-CTAB), 1500.3 F g⁻¹ (MnCoS-SDS), and 950.4 F g⁻¹ (MnCoS-H₂O) at a current density of 1 A g⁻¹ in 3 M KOH aqueous solution. When the current density increased to 10 A g⁻¹, the MnCoS-CTAB with the highest specific capacitance exhibited a capacitance of 1371.9 F g⁻¹, with a 71% capacity retention up to 1000 cycles, showing a good rate performance and cycle stability.

A series of new red phosphors, MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K), were synthesized using the solidstate reaction method, and their photoluminescence spectra were measured. The MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors were efficiently excited by an ultraviolet (UV; 395 nm) source, and showed intense orange-red emission at 595 nm. Further investigation of the concentration-dependent emission spectra indicated that the MZr2(PO4)3:Eu3+; Bi3+ (M=Na; K) phosphors exhibit the strongest luminescence intensity when y = 0.01 in NaZr2(0:95−y)(PO4)3:Eu0.103+, Bi2y 3+ and y = 0.09 in NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+, whereas the relative PL intensity decreases with increasing Bi3+ concentration due to concentration quenching. The addition of Bi3+ widens the excitation band of NaZr2(0.95−y)(PO4)3:Eu0.103+, Bi2y 3+ around 320 nm, which provides the useful idea of broadening the excitation band around 300–350 nm to fit the ultraviolet chip.