Electronic Supplementary Informa on (ESI) available: additional XRD spectra, polarization curves, Tafel plots and electrolyte resistance of catalysts prepared in this work, overall XPS spectra, nitrogen adsorption-desorption isotherm and EIS spectra of V-Co-Fe-343, List of relative parameters for oxygen evolution reaction. See Hydrogen (H2) generated from water splitting is deemed as the ideal replacement for conventional sources of energy. Catalysts play a valuable role in water splitting, especially the oxygen evolution reaction (OER). Here, we report a Fe-doped Co3V2O8 nanoparticle catalyst ( iron-rich V-Co-Fe), which possesses outstanding OER catalytic activity with ƞj = 10 mA cm -2 = 307 mV, and a low Tafel slope of 36 mV dec -1 , benefiting by large degree of amorphization, rich porous structure as well as high specific surface area (about 232.1 m 2 g -1 ). And, more remarkable, the catalytic performance of the V-Co-Fe catalyst is markedly superior to commercial ruthenium oxide. In addition, the durability of the V-Co-Fe catalyst is fine. The current density collapses by less than 3 percent at 1.55V vs. RHE after 11 h, in comparison with the initial value. Moreover, this work reveals that the V-Co-Fe catalyst displays an excellent performance in both OER catalytic activity and stability, which may have the potential to be the ideal substitute of noble metal-based catalysts for water splitting to obtain affordable clean energy.

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This work presents the development of a facile ligand-assisted hydrothermal reaction for the preparation of NIR-activated Fe(3)O(4) nanostructures that can directly upgrade the iron oxide with MR contrast ability to be a MRI/photothermal theranostic agent.

The discovery of different binding receptors to allow rapid and high-sensitivity detection via a noninvasive urine test has become the goal for urothelial carcinoma (UC) diagnosis and surveillance. In this study, we developed a new screening membrane receptor platform for bladder cancer cells by integrating surface-enhanced Raman spectroscopy (SERS) with 4-aminothiophenol (4-ATP)-modified AuAg nanohollows upon NIR laser excitation. AuAg nanohollows have an absorption band at ∼630 nm, and slightly off-resonance 785 nm laser excitation is used for minimal photothermal effect. Using the same carbodiimide cross-linker chemistry to conjugate anti-EGFR, transferrin (TF), 4-carboxyphenylboronic acid (CPBA), folic acid (FA), and hyaluronic acid (HA) molecules, by screening the 4-ATP SERS signals intensity, we demonstrated that the targeting efficiency with the cost-effective CPBA molecule is comparable with the conjugation of anti-EGFR antibody to aggressive T24 cancer cells (high-grade), while weak intensity 4-ATP SERS responses to targets were obtained by grade-I RT4 bladder cancer cells, NIH/3T3 fibroblast cells, and SV-HUC1 bladder normal cells. This SERS nanoprobe platform makes primary bladder carcinoma screening from in vitro to ex vivo more straightforward. Our demonstration offers exciting potential for SERS screening of specific receptors on cancer cells of different grades and facilitates new opportunities ranging from surface engineering of SERS material tags to SERS imaging-guided and targeted phototherapy of cancer cells by controlling the laser powers.