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Hydrogenation/oxidation induced efficient reversible color switching between methylene blue and leuco-methylene blue†
RSC Advances ( IF 3.9 ) Pub Date : 2017-06-09 00:00:00 , DOI: 10.1039/c7ra04498d Ya-Nan Liu 1, 2, 3, 4, 5 , Xiao Zhou 1, 2, 3, 4, 5 , Xin Wang 1, 2, 3, 4, 5 , Kuang Liang 1, 2, 3, 4, 5 , Zheng-Kun Yang 1, 2, 3, 4, 5 , Cong-Cong Shen 1, 2, 3, 4, 5 , M. Imran 1, 2, 3, 4, 5 , Shafaq Sahar 1, 2, 3, 4, 5 , An-Wu Xu 1, 2, 3, 4, 5
RSC Advances ( IF 3.9 ) Pub Date : 2017-06-09 00:00:00 , DOI: 10.1039/c7ra04498d Ya-Nan Liu 1, 2, 3, 4, 5 , Xiao Zhou 1, 2, 3, 4, 5 , Xin Wang 1, 2, 3, 4, 5 , Kuang Liang 1, 2, 3, 4, 5 , Zheng-Kun Yang 1, 2, 3, 4, 5 , Cong-Cong Shen 1, 2, 3, 4, 5 , M. Imran 1, 2, 3, 4, 5 , Shafaq Sahar 1, 2, 3, 4, 5 , An-Wu Xu 1, 2, 3, 4, 5
Affiliation
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In this paper, we present the use of graphitic carbon nitride (g-C3N4) supported palladium nanoparticles (Pd/g-C3N4) for reversible color switching of methylene blue (MB). g-C3N4 with a high polymeric degree could improve the dispersity of Pd nanoparticles, contributing to fast color switching of MB as the agglomeration of metal nanoparticles is significantly prevented. Moreover, strong metal-support interaction (SMSI) between Pd nanoparticles and g-C3N4 support promotes the adsorption and subsequent dissociation of molecular hydrogen and oxygen, thus leading to efficient reversible conversion between MB and leuco-methylene blue (LMB). Our obtained Pd/g-C3N4 nanocatalyst exhibits outstanding hydrogenation activity of blue MB to colorless LMB with a turnover frequency as high as 165 h−1 at room temperature, moreover, colorless LMB can quickly switch back to MB upon exposing the same reaction system to oxygen for oxidation. It is noted that our color switching system exhibits remarkable reversibility and stability without obvious fatigue even after 10 consecutive cycles. This novel redox-driven reversible color switching system could find potential in food packaging, sensing and organic transformations.
中文翻译：
加氢/氧化诱导亚甲基蓝和无色亚甲基蓝之间的有效可逆颜色转换†
在本文中，我们介绍了使用石墨碳氮化物（gC 3 N 4）负载的钯纳米粒子（Pd / gC 3 N 4）用于亚甲基蓝（MB）的可逆颜色转换。高聚合度的gC 3 N 4可以改善Pd纳米粒子的分散性，因为显着防止了金属纳米粒子的团聚，从而有助于MB的快速颜色转换。此外，Pd纳米颗粒与gC 3 N 4之间具有很强的金属-载体相互作用（SMSI）载体促进了分子氢和氧的吸附和随后的离解，从而导致了MB与无色亚甲基蓝（LMB）之间的有效可逆转化。我们获得的Pd / gC 3 N 4纳米催化剂在室温下具有出色的蓝色MB到无色LMB的氢化活性，周转频率高达165 h -1，而且，通过暴露相同的反应体系，无色LMB可以快速切换回MB。到氧气进行氧化。值得注意的是，即使连续10个循环后，我们的色彩切换系统仍具有出色的可逆性和稳定性，而不会出现明显的疲劳。这种新颖的氧化还原驱动的可逆颜色切换系统可以在食品包装，感测和有机转化中发现潜力。
更新日期：2017-06-09
中文翻译：
加氢/氧化诱导亚甲基蓝和无色亚甲基蓝之间的有效可逆颜色转换†
在本文中，我们介绍了使用石墨碳氮化物（gC 3 N 4）负载的钯纳米粒子（Pd / gC 3 N 4）用于亚甲基蓝（MB）的可逆颜色转换。高聚合度的gC 3 N 4可以改善Pd纳米粒子的分散性，因为显着防止了金属纳米粒子的团聚，从而有助于MB的快速颜色转换。此外，Pd纳米颗粒与gC 3 N 4之间具有很强的金属-载体相互作用（SMSI）载体促进了分子氢和氧的吸附和随后的离解，从而导致了MB与无色亚甲基蓝（LMB）之间的有效可逆转化。我们获得的Pd / gC 3 N 4纳米催化剂在室温下具有出色的蓝色MB到无色LMB的氢化活性，周转频率高达165 h -1，而且，通过暴露相同的反应体系，无色LMB可以快速切换回MB。到氧气进行氧化。值得注意的是，即使连续10个循环后，我们的色彩切换系统仍具有出色的可逆性和稳定性，而不会出现明显的疲劳。这种新颖的氧化还原驱动的可逆颜色切换系统可以在食品包装，感测和有机转化中发现潜力。
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