MOF Structure engineering to synthesize core-shell heterostructures with controllable shell layer thickness: Regulating gas selectivity and sensitivity

Biological Transformation of AgI on MOF-on-MOF-Derived Heterostructures: Toward Polarity-Switchable Photoelectrochemical Biosensors for Neuron-Specific Enolase

“…Their relative atomic contents are listed in Table S1. The high-resolution XPS spectrum of Zn in Figure b shows two binding energies of 1044.6 and 1021.5 eV, which can be attributed to the Zn 2p 1/2 and Zn 2p 3/2 orbitals, respectively . As shown in Figure c, two characterized peaks at 451.7 and 444.1 eV can be assigned to In 3d 3/2 and 3d 5/2 , indicating the existence of +3 states of In cations .…”

“…The high-resolution XPS spectrum of Zn in Figure 2b shows two binding energies of 1044.6 and 1021.5 eV, which can be attributed to the Zn 2p 1/2 and Zn 2p 3/2 orbitals, respectively. 37 As shown in Figure 2c, two characterized peaks at 451.7 and 444.1 eV can be assigned to In 3d 3/2 and 3d 5/2 , indicating the existence of +3 states of In cations. 38 To further determine the oxygen species in the ZnO@In 2 O 3 @AgI heterogeneous structure, the O 1s spectrum in Figure 2d is deconvoluted into three peaks, which corresponded to adsorbed oxygen (O abs ), oxygen vacancies (O v ), and lattice oxygen (O L ), with binding energies of 532.4, 531.3, and 529.7 eV, respectively.…”

“…The ZIF-8@MIL-68 was prepared according to the literature with some subtle alteration . MIL-68 (150 mg) was dispersed into the 2-methylimidazole methanol solution (48 mM, 20 mL) and stirred for 1 h. Subsequently, Zn­(NO 3 ) 2 ·6H 2 O methanol solution (5 mM, 20 mL) was added and continuously stirred for 30 min and then the mixture was heated to 70 °C and stirred for 3 h. The final resultants were collected, washed with methanol, and dried at 60 °C for 12 h. Details of the synthesis of MIL-68 and ZIF-8 are listed in the Supporting Information.…”

Ultrasensitive and Exclusive Chemiresistors with a ZIF-67-Derived Oxide Cage/Nanofiber Co3O4/In2O3 Heterostructure for Acetone Detection

“…Consequently, at high RH levels, there is a decrease in active sites, leading to a decline in the sensing response. We have compared the operating temperature, response value, and response time for our work with other reported In 2 O 3 -based acetone gas sensors, as shown in Figure f and listed in Table S3. ,− It is worth noting that our CIO-2 sensor exhibits the highest response, fastest response speed, and lowest detection limit at similar temperatures compared with the previous acetone sensors.…”

Synthesis of ZnFe2O4@MoS2 core-shell nanocomposites with enhanced lubrication performance as lubricant additives

“…Hard core particles can provide better support for the soft shell, so that the shell can continuously repair deep wear marks to reduce matrix wear; at the same time, the characteristics of low shear force of soft shell can extend the rolling lubrication effect time of core particles and reduce the abrasive wear caused by core particles to the matrix; duplex composite particles form rolling elements by desorption at the friction interface, which promotes the uniformity and integrity of the transfer film and improves the self-healing ability of the transfer film (Chen et al , 2020a). In addition, the interaction of core–shell interface can provide an important basis for the controllable preparation of core–shell composites and the formation of core–shell complexes with stable structure and easy to uniformly disperse, and the core size and shell thickness can be regulated by changing the reagent ratio (Wang et al , 2022; Li et al , 2022; Chen et al , 2023). These advantages make the core–shell structural material as a lubricant additive to provide better antifriction and antiwear properties than conventional lubricant additives.…”