当前位置: X-MOL 学术J. Mater. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Enhanced visible–NIR-driven photocatalytic activities over NaYF4:Yb3+, Er3+/Ag2CrO4 composite
Journal of Materials Science ( IF 3.5 ) Pub Date : 2020-05-09 , DOI: 10.1007/s10853-020-04723-2
Kailian Zhang , Man Zhou , Changlin Yu , Kai Yang , Xiaoxiao Li , Shi Yang , Jie Guan , Wenxin Dai , Weiya Huang

Wide spectral responsive photocatalysts are of great importance for making full use of solar energy and broad application in highly efficient photocatalytic wastewater treatment, production of H2O2, etc. Thereinto, it is significative to open an appropriate way to extend the absorption to the NIR region, in which it accounts for ~ 49% in the solar spectrum. In this work, we synthesized successfully the new-style NaYF4:Yb3+, Er3+/Ag2CrO4 photocatalyst via the hydrothermal and followed precipitation method, and it exhibited the more excellent photocatalytic performances than Ag2CrO4 for the photocatalytic H2O2 production and disposals of pollutants, such as methyl orange (MO), methylene blue (MB), rhodamine B (RhB) and tetracycline (TCs). The morphological, structural and optical behavior were investigated by XRD, SEM, N2 adsorption/desorption, TEM, XPS, UV–Vis DRS, UC luminescence and photoelectrochemical experiments. It revealed that NaYF4:Yb3+, Er3+/Ag2CrO4 photocatalyst presented stronger absorptive capacity in the visible–NIR region by the benign fluorescence resonance energy transfer (NaYF4:Yb3+, Er3+ can convert near-infrared light to visible light via upconversion process), and showed more efficient charge transfer and separation than that of pure Ag2CrO4. The primary reactive species of ·O2− and h+ by the trapping experiments played a considerable important role in the photocatalytic process. A promising potent system was suggested for the highly efficient utilization of sunlight in the enhancement of photocatalytic activities.

中文翻译:

在 NaYF4:Yb3+、Er3+/Ag2CrO4 复合材料上增强可见光-NIR 驱动的光催化活性

宽光谱响应光催化剂对于充分利用太阳能和广泛应用于高效光催化废水处理、生产 H2O2 等具有重要意义。其中,开辟一条适当的途径将吸收扩展到 NIR 区域具有重要意义,其中它在太阳光谱中约占 49%。在这项工作中,我们通过水热法和后续沉淀法成功合成了新型 NaYF4:Yb3+、Er3+/Ag2CrO4 光催化剂,在光催化 H2O2 生产和处理甲基等污染物方面表现出比 Ag2CrO4 更优异的光催化性能。橙色 (MO)、亚甲蓝 (MB)、罗丹明 B (RhB) 和四环素 (TC)。通过 XRD、SEM、N2 吸附/解吸、TEM、XPS、UV-Vis DRS、UC 发光和光电化学实验。结果表明,NaYF4:Yb3+、Er3+/Ag2CrO4光催化剂通过良性荧光共振能量转移在可见光-近红外区表现出更强的吸收能力(NaYF4:Yb3+、Er3+可以通过上转换过程将近红外光转换为可见光),并表明比纯 Ag2CrO4 更有效的电荷转移和分离。通过捕获实验得到的主要活性物质·O2-和h+在光催化过程中起到了相当重要的作用。提出了一种有前途的有效系统,可以高效利用阳光来增强光催化活性。Er3+/Ag2CrO4 光催化剂通过良性的荧光共振能量转移(NaYF4:Yb3+,Er3+ 可以通过上转换过程将近红外光转换为可见光)在可见光-近红外区表现出更强的吸收能力,并且表现出比其更有效的电荷转移和分离。纯 Ag2CrO4。通过捕获实验得到的主要活性物质·O2-和h+在光催化过程中起到了相当重要的作用。提出了一种有前途的有效系统,可以高效利用阳光来增强光催化活性。Er3+/Ag2CrO4 光催化剂通过良性的荧光共振能量转移(NaYF4:Yb3+,Er3+ 可以通过上转换过程将近红外光转换为可见光)在可见光-近红外区表现出更强的吸收能力,并且表现出比其更有效的电荷转移和分离。纯 Ag2CrO4。通过捕获实验得到的主要活性物质·O2-和h+在光催化过程中起到了相当重要的作用。提出了一种有前途的有效系统,可以高效利用阳光来增强光催化活性。并表现出比纯 Ag2CrO4 更有效的电荷转移和分离。通过捕获实验得到的主要活性物质·O2-和h+在光催化过程中起到了相当重要的作用。提出了一种有前途的有效系统,可以高效利用阳光来增强光催化活性。并表现出比纯 Ag2CrO4 更有效的电荷转移和分离。通过捕获实验得到的主要活性物质·O2-和h+在光催化过程中起到了相当重要的作用。提出了一种有前途的有效系统,可以高效利用阳光来增强光催化活性。
更新日期:2020-05-09
down
wechat
bug