Immobilization of self-stabilized plasmonic Ag-AgI on mesoporous Al2O3 for efficient purification of industrial waste gas with indoor LED illumination

Facet Engineered α-MnO2 for Efficient Catalytic Ozonation of Odor CH3SH: Oxygen Vacancy-Induced Active Centers and Catalytic Mechanism

“…The phase structure for the three facet-engineered MnO 2 was first identified by XRD. − As displayed in Figure a, the three facet MnO 2 all exhibit distinct peaks at 12.8°, 18.1°, 28.9°, 37.6°, 49.9°, and 60.2°, corresponding to the diffraction plane of (110), (200), (310), (211), (411), and (521), respectively, well consistent with the standard tetragonal phase of α- MnO 2 (JCPDS 44-0141). Through comparing the peak intensities of these three samples (Figure b), an obvious distinction can be observed in the relative ratio of their strength: for 310-MnO 2 , the diffraction peak referring to (310) is clearly more intense and sharper with respect to the peaks in (110) and (100).…”

“…26 Compared with the bare Al 2 O 3 , the immobilized MnO 2 leads to a decline in the surface area/pore size (238.2 m 2 g −1 /4.1 nm) of 310-MnO 2 /Al 2 O 3 and clearly observed XRD patterns of 310-MnO 2 (Figures S2 and S3 and Tables S3 and S4), confirming the 310-MnO 2 are well deposited on the surface and into the channels of Al 2 O 3 . 33 As depicted in Figure S4, within 800 s reaction, 310-MnO 2 /Al 2 O 3 can realize 100% removal efficiency for 70 ppm of CH 3 SH, faster than that of 310-MnO 2 alone. These results can shed new light on designing novel and efficient catalysts for catalytic ozonation.…”

“…To promote the applicability of 310-MnO 2 in view of practice, mesoporous Al 2 O 3 supports were used to immobilize α- MnO 2 , as it can provide the extensive reactive sites for enhancing retention time and practicability for reuse . Compared with the bare Al 2 O 3 , the immobilized MnO 2 leads to a decline in the surface area/pore size (238.2 m 2 g –1 /4.1 nm) of 310-MnO 2 /Al 2 O 3 and clearly observed XRD patterns of 310-MnO 2 (Figures S2 and S3 and Tables S3 and S4), confirming the 310-MnO 2 are well deposited on the surface and into the channels of Al 2 O 3 . As depicted in Figure S4, within 800 s reaction, 310-MnO 2 /Al 2 O 3 can realize 100% removal efficiency for 70 ppm of CH 3 SH, faster than that of 310-MnO 2 alone.…”

Enhanced Performance and Conversion Pathway for Catalytic Ozonation of Methyl Mercaptan on Single-Atom Ag Deposited Three-Dimensional Ordered Mesoporous MnO2

“…33 Moreover, most noble-metal atoms are lost inside the bulk during synthesis through conventional methods such as coprecipitation or photodeposition, where they are no longer effective as active sites. 34,35 Furthermore, some studies also indicate that more tight contact can be achieved between the atomic metal and MnO 2 than that of a Ag cluster and MnO 2 and thus can enhance the charge transfer of catalyst for catalytic reaction. 36,37 Inspired by the strategy for stabilizing single-atom Au on the surface of MnO 2 rods via trapping by Chen et al, 38 we developed a modified redox precipitation to fabricate single-atom Ag deposited 3D α-MnO 2 PHMSs for CH 3 SH removal in the present work.…”

Facile Synthesis of Magnetic Photocatalyst Ag/BiVO4/Mn1−xZnxFe2O4 and Its Highly Visible-Light-Driven Photocatalytic Activity

“…These photocatalysts possess superior physicochemical and magneto-optical properties [1,2,3,4]. Non-toxic bismuth vanadate (BiVO 4 ), with good light absorption and high ionic conductivity [5,6,7,8], has attracted strong interest from scientists.…”