Facile synthesis of porous hollow iron oxide nanoparticles supported on carbon nanotubes

XAFS Study on the Specific Deoxidation Behavior of Iron Titanate Catalyst for the Selective Catalytic Reduction of NOx with NH3

“…This result suggests that after the reduction of Fe 2 O 3 to Fe 3 O 4 below 500 8C, the Fe species could be reduced further to FeO and then to metallic Fe 0 mainly following a three-stage reduction mechanism as mentioned above. [27,41,42] As for the H 2 -reduced FeTiO x catalyst, no FeO phase can be abstracted from the Fe K XANES spectrum, con- 3 and Fe foil as references, the Fe K XANES of the FeTiO x catalyst after H 2 reduction is well simulated with high fitting degree, which is consistent with our viewpoint concerning the H 2 -TPR result in Figure 3. As shown in Table 1 The XANES spectra of Ti K edge in FeTiO x catalysts before and after H 2 reduction were recorded by using Ti foil, anatase TiO 2 , rutile TiO 2 , FeTiO 3 , and Fe 2 TiO 5 as references, and the results are shown in Figure 5 A.…”

“…As shown in Figure 3, the H 2 /Fe molar ratio for the reduction peak of Fe 2 O 3 at 405 8C was calculated to be 0.17, which was exactly consistent with the reduction process from Fe 2 [27,41,42] XANES measurements could clearly discriminate the possible mixed Fe species in reduced Fe 2 O 3 , which will be discussed in detail below.…”

Formulation and catalytic performance of MOF-derived Fe@C/Al composites for high temperature Fischer–Tropsch synthesis

“…To this purpose, both the consumption of H2 and the TPR profiles of the nanocomposites have been compared to that of the pure 38Fe@C catalyst and the results are shown in Figure 2. All the samples exhibited two reduction steps, agreeing with the stepwise reduction of iron oxides as Fe3O4→FeO→Fe 34 . Thereby, the first reduction of Fe3O4 to FeO takes place followed by reduction to metallic Fe.…”

Removal of Cr(VI) from Water Using a New Reactive Material: Magnesium Oxide Supported Nanoscale Zero-Valent Iron

“…To overcome these disadvantages, in recent years, it has been proposed to fix the NZVI particles onto proper materials. Several supports have been tested, including organic and inorganic materials: bentonite [ 1 , 4 , 21 ], zeolite [ 22 , 23 ], alginate [ 5 ], resin [ 24 , 25 ], silica fume [ 26 ], attapulgite [ 2 ], montmorillonite [ 27 ], organo-montmorillonite [ 28 ], pillared clay [ 29 ], palygorskite [ 30 ], rectorite [ 15 ], sepiolite [ 31 ], pumice [ 32 ], kaolin [ 33 ], chitosan [ 34 ], titanium nanotubes [ 35 ], carbon nanotubes [ 36 ], cellulose acetate [ 37 ]. Despite that these supports have proved their effectiveness for the treatment of a wide range of contaminants under experimental conditions, the development of new supporting materials remains a major issue in the application of NZVI processes [ 1 ].…”