Niobium-based oxides can be used in several applications due to a diverse set of properties. In this work, Na₂Nb₂O₆.H₂O sodium niobate nanowires were obtained by hydrothermal synthesis at low temperature. Dehydrated sodium niobate (Na₂Nb₂O₆) and sodium niobate with perovskite structure (NaNbO₃) were obtained by submitting Na₂Nb₂O₆.H₂O to heat treatment (350 °C and 500 °C, respectively). To obtain protonic niobates, sodium niobates were immersed in nitric acid in order to promote ion exchange reactions. From this procedure, protonic niobates (H₃O)₂Nb₂O₆.H₂O and (H₃O)₂Nb₂O₆ were obtained. The sample NaNbO₃ did not undergo any transformation. Cyclic voltammetry tests carried out in a neutral aqueous solution 1 M Na₂SO₄ showed a wide potential window for both niobates (sodium and protonic). However, the protonic niobate samples (H₃O)₂Nb₂O₆.H₂O and (H₃O)₂Nb₂O₆ presented much higher current density values than the sodium niobates. This result can be related to a structural rearrangement that allowed a significant increase in the intercalation of sodium Na ⁺ ions from the electrolyte into the structure of these protonic niobates, when polarized. Therefore, in this work, it was demonstrated that it is possible to obtain protonic niobates from sodium niobates, as well as, it was verified the distinct electrochemical behavior between these materials.

由于一系列不同的特性，铌基氧化物可用于多种应用。本工作通过低温水热合成获得了Na ₂ Nb ₂ O ₆ .H ₂ O铌酸钠纳米线。通过提交Na ₂ Nb ₂ O ₆ .H ₂获得脱水铌酸钠（Na ₂ Nb ₂ O ₆）和具有钙钛矿结构的铌酸钠（NaNbO ₃）O 进行热处理（分别为 350 °C 和 500 °C）。为了获得质子铌酸盐，将铌酸钠浸入硝酸中以促进离子交换反应。从该过程中，获得质子铌酸盐(H ₃ O) ₂ Nb ₂ O ₆ .H ₂ O和(H ₃ O) ₂ Nb ₂ O ₆。NaNbO ₃样品没有发生任何转变。在中性水溶液 1 M Na ₂ SO _{4 中}进行的循环伏安法测试显示了两种铌酸盐（钠和质子）的宽电位窗口。然而，质子铌酸盐样品 (H ₃ O)₂ Nb ₂ O ₆ .H ₂ O 和(H ₃ O) ₂ Nb ₂ O ₆呈现出比铌酸钠高得多的电流密度值。该结果可能与结构重排有关 ，当极化时，该重排允许钠 Na ⁺离子从电解质插入到这些质子铌酸盐的结构中的显着增加 。因此，在这项工作中，证明可以从铌酸钠获得质子铌酸盐，并验证了这些材料之间不同的电化学行为。