Realizing a long-term, high-performance, and affordable photocatalytic setting for water splitting processes remains challenging despite the tremendous promise. We present a direct fabrication of graphitic carbon nitride-wrapped titanate nanotube array (gC₃N₄-wrapped TNA) heterojunction photoelectrodes via a chemical vapor deposition-like process that leverages the pyrolysis and sublimation of melamine at 500 °C. The gC₃N₄-wrapped TNA heterojunction photoelectrodes show a 16 times enhancement of current density and photo-response than bare TNAs. Such a remarkable enhancement comes from the effective charge separation of the gC₃N₄/TNA interfaces, consequently accelerating water splitting to generate oxygen under visible light. In addition, our gC₃N₄-wrapped TNA photoelectrodes are developed under a neutral condition that significantly increases their widespread use for practical devices.

尽管前景广阔，但实现水分解过程的长期、高性能和负担得起的光催化设置仍然具有挑战性。我们提出了一种通过利用三聚氰胺在 500°C 下的热解和升华的化学气相沉积类工艺直接制造石墨氮化碳包裹的钛酸盐纳米管阵列（gC ₃ N ₄包裹的 TNA）异质结光电极的方法。gC ₃ N ₄包裹的TNA异质结光电极显示出比裸TNA提高16倍的电流密度和光响应。如此显着的增强来自 gC ₃ N _{4的有效电荷分离}/TNA 界面，因此在可见光下加速水分解以产生氧气。此外，我们的 gC ₃ N ₄包裹 TNA 光电极是在中性条件下开发的，这显着增加了它们在实际设备中的广泛使用。