Abstract: Nano-sized strontium borate powders（SrB₆O₁₀） were prepared by carbon adsorption precipitation method.The Sr（Cl）₂ and ammonium pentaborate were taken as reactants.The calcination temperature，crystalline phase，particle size，and optical absorption properties of SrB₆O₁₀ were characterized by means of thermogravimetric analysis-differential thermal analy- sis（TG-DTA），X-ray diffraction（XRD），transmission electron microscope（TEM），and UV-Vis spectroscopy.The results showed that adsorption of activated carbon could prevent powder′s agglomeration during the preparation，drying，and calcination process.The SrB₆O₁₀ crystal had a good dispersion，average grain size was around 13 nm，and surface area was 83.26 m²/g at 600 ℃.The result of photocatalytic reaction for the degradation of Rhodamine B chloride under ultraviolet light radiation showed the degradation of Rhodamine B chloride  on the strontium borate catalysis almost complete in 60 min．

Key words: carbon adsorption, strontium borate, photocatalysis, Rhodamine B chloride