In this study, we combine a photochemical cell with a transistor, forming a novel optical-to-electronic interface using OECTs with a light-sensitive gate, which can be used for photonic, optogenetic and other applications where conversion from an optical to electronic signal is key.
The preparation of MIL-101 was simplified
to avoid the use of hazardous
hydrofluoric acid (HF). The potential application of MIL-101, prepared
by both this new method and the conventional approach, for CO2 isolation from multicomponent mixtures such as flue gas is
evaluated with regard to its relative adsorption capacity for different
flue gas components and retention of the CO2 capacity in
the presence of H2O, because flue gas contains gases other
than CO2 and moisture. CO2, CH4,
and N2 isotherms were determined for temperatures in the
range 25–105 °C and pressures up to 15 bar. CO2 adsorption capacities of 15.4 and 16.8 mol/kg at 25 °C and
15 bar were determined for conventional (1) and HF-free-synthesized
MIL-101 (2), respectively. The shape of the CO2 adsorption isotherm of 1 is slightly different from
that of 2. Material 1 showed higher CO2 adsorption at low CO2 pressure at 25 °C than 2 but lower CO2 adsorption at CO2 pressures
above 8 bar and almost identical adsorption for H2O. Both
materials adsorb more CH4 than N2, and the heat
of CO2 adsorption is low. The selectivity of material 2 for CO2 relative to N2 is higher than
that of 1, but for CO2 relative to CH4, it is similar to that of 1. The structures
of the two materials remain intact after exposure to H2O vapor at 100 °C and 50 mbar H2O vapor pressure.
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