本研究利用水熱法合成ZnSnO3奈米線陣列於FTO基板上，後與C3N4結合作為一複合材料，探討其複合材料之壓電能力、光催化能力以及光電化學之特性。
複合材料的製備透過兩種方式，一為將C3N4與酒精混合置於超音波震盪再使用旋轉塗佈法與ZnSnO3形成異質接合；另為將C3N4粉末施以水熱處理後，再把其分散溶液調配置酸性環境，將ZnSnO3放入其中靜置達成複合材料之形成。
在光降解測試中，複合材料有較佳的降解甲基藍的表現，其歸因於能幫助光電子電洞分離之異質接合結構，降低電子電洞的再結合，除以之外C3N4的存在使其複合材料能於可見光下有光催化效果。另外在外加微波與氙燈之照射下，複合材料及ZTO皆有產生較佳的表現。使用浸泡法製成之C3N4/ZnSnO3展現了最好的結果，其歸因於經過水熱處理後之C3N4其吸收度於可見光波段優於利用旋轉塗佈法之C3N4。於壓電性質的測試，可以發現本研究之複合材料於壓電性之表現並無明顯變高，其推斷為C3N4的加入。
本研究之複合材料壓電相關表現無明顯增加，其推斷為兩種材料間之異質接合仍需改善，若能使兩者間更加緊密接合，除了電子電洞分離的效果能夠更加帶動光催化與光電化學特性有所提升，於壓電之相關表現也將大幅提高。

Zinc tin oxide (ZnSnO3, ZTO) nanowire arrays were prepared through hydrothermal synthesis. It was coupled with C3N4 (melon) to form a heterogeneous nanocomposite as a catalyst material. In this study, two types of ZTO-C3N4 nanowire composite arrays were fabricated. One was fabricated by spin coating thermally condensed C3N4 on ZTO nanowire arrays (CN1). The other was developed by immersing ZTO nanowire arrays into C3N4 solutions, which was hydrothermally treated after the thermal condensation (CN2). Photodegradation, photoelectrochemical (PEC) water splitting, and piezo-related applications of the systems were investigated.
XRD analysis ascertained the fabrication of ZTO in the composite samples of CN1 and CN2. The presence of melon in composites was not observed because of the poor crystallinity and minor amounts of melon. Both ZTO and melon were observed in CN1 and CN2 through SEM images. ZTO nanowires were further ascertained by cross section SEM and TEM images. The particle size of hydrothermally treated melon was smaller than as-synthesized melon obtained from thermal condensation. Melon in CN1 and CN2 was also ascertained through Raman and optical measurements. From UV-vis results, CN1 and CN2 exhibited absorption edges towards the visible light range. This was attributed to the presence of melon.
The Schottky contact behavior of ZTO nanowire arrays was observed through I-V measurements. The piezotronic feature was ascertained. However, no improvement of piezotronic effect for the samples of CN1 and CN2.
The photocatalytic performance of ZTO could be enhanced by coupling with melon in the samples of CN1 and CN2. It was due to the improvement of separation of electrons and holes. The sonophotodegradation of ZTO and CN2 was explored by applying an ultrasonic vibration to the samples under illumination. Both ZTO and CN2 exhibited the enhanced degradation performance. The enhanced catalytic activity was attributed to increased availability of ZTO nanowire active sites because of ZTO nanowire surface sweeping.

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