Enhanced NO2 gas-sensing performance by core-shell SnO2/ZIF-8 nanospheres

Construction of Cu2O@Cu1.75S Core‐shell Octahedrons for Enhanced NO2 Gas Sensing at Low Temperature

“…As shown in Figure 6a, it shows the state of the gas sensing materials in air. As reported in many articles, the oxygen species on the surface of sensing materials mainly exist in the form of O 2 − when the temperature is lower than 150 °C [35, 36]. Therefore, oxygen molecules adsorbed on the surface of p‐type Cu 2 O@Cu 1.75 S mainly form O 2 − by capturing electrons from semiconductor materials.…”

“…when the temperature is lower than 150 °C[35,36]. Therefore, oxygen molecules adsorbed on the surface of p-type Cu 2 O@Cu 1.75 S mainly form O 2 À by capturing electrons from semiconductor materials.…”

Confinement of MACl guest in 2D ZIF-8 triggers interface and bulk passivation for efficient and UV-stable perovskite solar cells

“…3(a) schematically demonstrates the interaction between SnO 2 and ZIF-8. The presence of uncoordinated N and Zn atoms at the edges of the ZIF-8 framework allows them to passivate the defective sites on the SnO 2 surface 38,39 To verify the speculation, the chemical states were investigated by XPS. As Fig.…”

Heterojunctions of ZnO-Nanorod-Decorated WO3 Nanosheets Coated with ZIF-71 for Humidity-Independent NO2 Sensing

“…27 Zhan et al designed a core−shell structured SnO 2 /ZIF-8 nanospheres for NO 2 gas detection, which exhibited outstanding gas sensing performance to NO 2 gas, with a response value of 164 and a fast response/recovery time of 60 s/45 s at 300 °C to 70 ppm NO 2 gas. 28 Zhou et al reported on the synthesis of ZnO nanorods coated with a layer of zeolitic imidazolate framework (ZIF)-8 and ZIF-71, effectively enhancing the selectivity of ZnO materials through the molecular sieving effect of ZIFs. Simultaneously, the ZnO@ZIF-71 materials exhibited a preconcentration effect for acetone and ethanol, which significantly improved the sensitivity to ethanol and acetone gas.…”