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Two-Dimensional Titanium Nitride (Ti2N) MXene: Synthesis, Characterization, and Potential Application as Surface-Enhanced Raman Scattering Substrate
ACS Nano ( IF 15.8 ) Pub Date : 2017-09-05 00:00:00 , DOI: 10.1021/acsnano.7b03129 Bhuvaneswari Soundiraraju 1 , Benny Kattikkanal George 1
ACS Nano ( IF 15.8 ) Pub Date : 2017-09-05 00:00:00 , DOI: 10.1021/acsnano.7b03129 Bhuvaneswari Soundiraraju 1 , Benny Kattikkanal George 1
Affiliation
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We report on the synthesis, characterization, and application of Ti2N (MXene), a two-dimensional transition metal nitride of M2X type. Synthesis of nitride-based MXenes (Mn+1Nn) is difficult due to their higher formation energy from Mn+1ANn and poor stability of Mn+1Nn layers in the etchant employed, typically HF. Herein, the selective etching of Al from ternary layered transition metal nitride Ti2AlN (MAX) and intercalation were achieved by immersing the powder in a mixture of potassium fluoride and hydrochloric acid. The multilayered Ti2NTx (T is the surface termination) obtained was sonicated in DMSO and centrifuged to obtain few-layered Ti2NTx. MXene formation was verified, and the material was completely characterized by Raman spectroscopy, XRD, XPS, FESEM-EDS, TEM, STM, and AFM techniques. Surface-enhanced Raman scattering (SERS) activity of the synthesized Ti2NTx was investigated by fabricating paper, silicon, and glass-based SERS substrates. A Raman enhancement factor of 1012 was demonstrated using rhodamine 6G as the model compound with 532 nm excitation wavelength. Detection of trace level explosives with a simple paper-based SERS substrate with Ti2N (MXene) as active material was also illustrated.
中文翻译：
二维氮化钛（Ti 2 N）MXene：表面增强拉曼散射基板的合成，表征和潜在应用
我们报告了Ti 2 N（MXene）（一种M 2 X型二维过渡金属氮化物）的合成，表征和应用。氮化物基MXene（M n +1 N n）的合成很困难，因为它们从M n +1 AN n形成的能量更高，并且在所用的蚀刻剂（通常为HF）中M n +1 N n层的稳定性差。在此，通过将粉末浸入氟化钾和盐酸的混合物中，从三元层状过渡金属氮化物Ti 2 AlN（MAX）中选择性蚀刻Al并进行插层。多层Ti 2 NT将获得的x（T是表面终止）在DMSO中超声处理并离心以获得几层的Ti 2 NT x。验证了MXene的形成，并通过拉曼光谱，XRD，XPS，FESEM-EDS，TEM，STM和AFM技术对材料进行了完全表征。通过制造纸，硅和玻璃基SERS基底，研究了合成的Ti 2 NT x的表面增强拉曼散射（SERS）活性。使用若丹明6G作为激发波长为532 nm的模型化合物，证明拉曼增强因子为10 12。使用带有Ti 2的简单纸基SERS基底检测痕量炸药还示出了N（MXene）作为活性材料。
更新日期：2017-09-06
中文翻译：
二维氮化钛（Ti 2 N）MXene：表面增强拉曼散射基板的合成，表征和潜在应用
我们报告了Ti 2 N（MXene）（一种M 2 X型二维过渡金属氮化物）的合成，表征和应用。氮化物基MXene（M n +1 N n）的合成很困难，因为它们从M n +1 AN n形成的能量更高，并且在所用的蚀刻剂（通常为HF）中M n +1 N n层的稳定性差。在此，通过将粉末浸入氟化钾和盐酸的混合物中，从三元层状过渡金属氮化物Ti 2 AlN（MAX）中选择性蚀刻Al并进行插层。多层Ti 2 NT将获得的x（T是表面终止）在DMSO中超声处理并离心以获得几层的Ti 2 NT x。验证了MXene的形成，并通过拉曼光谱，XRD，XPS，FESEM-EDS，TEM，STM和AFM技术对材料进行了完全表征。通过制造纸，硅和玻璃基SERS基底，研究了合成的Ti 2 NT x的表面增强拉曼散射（SERS）活性。使用若丹明6G作为激发波长为532 nm的模型化合物，证明拉曼增强因子为10 12。使用带有Ti 2的简单纸基SERS基底检测痕量炸药还示出了N（MXene）作为活性材料。
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