Multifunctional photoelectric sensors and catalysts for CO2RR and Cr(vi) solution based on a series of POM-based materials. Issue 12 (11th March 2021) - Wang, Chen
Abstract : A series of POM-based materials can be used as photoelectric sensors and have high catalytic activities for CO2 RR and the reduction of Cr(vi ) solution, which are significant for environmental protection and energy shortage. Abstract : Five new Keggin-based compounds, namely [Cu I (dm4bt)2 ]4 [GeW12 O40 ] (1 ), [MII4(dm4bt)8 (GeW12 O40 )2 (H2 O)2 ]·4H2 O (M = Ni for 2 and Co for 3 ), [CoII4(dm4bt)8 (SiW12 O40 )2 (H2 O)2 ]·6H2 O (4 ) and [CuII2(H2 bdpm)(HBW12 O40 )(H2 O)2 ]·H2 O (5 ) (dm4bt = 2, 2′-dimethyl-4, 4′-bithiazole, H2 bdpm = 1, 1′-bis(3, 5-dimethyl-1 H -pyrazolate)methane), were synthesized through traditional hydrothermal methods. Compounds 1–5 can be used as photoelectric multifunctional sensors to detect various ions. As electrochemical sensors, n -CPEs have a good sensitivity and wide concentration range for nitrite. As fluorescent sensors, the title compounds have remarkable fluorescence detection performance for Cr2 O7 2− . Furthermore, we modified the compounds as catalysts to investigate their catalytic activities for CO2 reduced to CO and the reduction of Cr(vi ) to Cr(iii ). The results show that these compounds have high catalytic activities.