The composite of tin oxide-reduced graphene oxide (SnO 2 /rGO) was prepared via a green synthesis of rGO using Pometia pinnata leaf extract followed by the dispersion of the SnO 2 precursor. The composite was employed as a photocatalyst for the removal of methylene blue (MB) under UV and visible light. A variety of spectroscopic and analytical techniques, consisting of X-ray diffraction, Fourier-transform infrared, scanning transmission electron microscopy, photoluminescence spectroscopy, and a transmission electron microscope, was used to characterize the physical properties of the photocatalyst. The characterizations represent the dispersed SnO 2 nanoparticles in the rutile phase with the mean particle size of 72 nm. The photocatalytic activity experiments revealed the superiority of the composite for photodegradation application under the visible light source compared to UV light. This visible light-responsive property is fit with photoluminescence intensity in the visible light range. It was found that SnO 2 /rGO yields the degradation efficiency of ca. 98.28% within 90 min.

中文翻译：

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用Pometia pinnata叶提取物制备的SnO2 / rGO可见光响应光催化剂

氧化锡还原的氧化石墨烯的复合物（SnO 2 / rGO）是通过使用Pometia pinnata叶提取物对rGO进行绿色合成，然后分散SnO 2前体而制备的。该复合物被用作光催化剂，以在紫外线和可见光下去除亚​​甲基蓝（MB）。包括X射线衍射，傅立叶变换红外光谱，扫描透射电子显微镜，光致发光光谱和透射电子显微镜在内的各种光谱和分析技术都用于表征光催化剂的物理性质。这些表征代表了分散在金红石相中的SnO 2纳米颗粒，平均粒径为72 nm。光催化活性实验表明，与紫外光相比，该复合材料在可见光源下可进行光降解。这种可见光响应特性与可见光范围内的光致发光强度相吻合。结果发现，SnO 2 / rGO产生的降解效率约为。90分钟内达到98.28％。