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This paper exhibits good example of high well-defined hollow silica spheres by using a low-cost sodium silicate precursor via a facile method. The N2 adsorption isotherm shows that this hollow structure leads to a high Brunauer–Emmett–Teller specific area of ca. 217.755 m2 g−1. Transmission electron microscopy and scanning electron microscopy images indicate that prepared hollow silica spheres have...
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