Microwave-assisted gas/liquid interfacial synthesis of flowerlike NiO hollow nanosphere precursors and their application as supercapacitor electrodes

Contribution of multiple reflections to light utilization efficiency of submicron hollow TiO2 photocatalyst

“…For applications in environmental and energy-related systems, various hollow spheres of metal, metal oxide, and carbon-based materials have been used in dye-sensitized solar cells [8], photocatalysis [9], fuel cells [10], lithium ion batteries [11], and supercapacitors [12]. It has been proven that the unique structure of hollow spheres provides an enhanced surface-to-volume ratio and reduced transport lengths for both mass and charge transport [13].…”

Fabrication of FeOOH hollow microboxes for purification of heavy metal-contaminated water

“…2). 29 In addition, the O 1s peak at 530.0 eV could be derived from Fe-O, and was associated with the crystal lattice oxygen species, 30 while the peak at 531.5 eV derived from the hydroxyl oxygen. 31 Combining with the FTIR results (Fig.…”

“…According to the fitting results (listed in Table 1), the correlation coefficients (R 2 ) of the Freundlich model of As(III), As(V) and Se(IV) were higher than those of the Langmuir model. Table 2 lists the adsorption capacities of FeOOH hollow microboxes and other comparable adsorbents from previous literature, such as ceria hollow nanospheres, 36 titanium dioxidecoated carbon nanotubes (TiO 2 -CNT), 5 GO-Fe composites, 37 chitosan-iron oxyhydroxide (CFOH), 11 magnetic nanoparticle-graphene oxide (MGO) 13 and Fe-Mn hydrous oxides. 38 The maximum adsorption capacities of the FeOOH hollow microboxes were 192.19 mg g À1 for As(III), 250.01 mg g À1 for As(V) and 169.88 mg g À1 for Se(IV), in good agreement with the experimental values.…”

Hierarchically nanostructured transition metal oxides for supercapacitors

“…However, the exceedingly high cost and environmentally poisonous nature limit their practical applications. Hence, cheap and high-performance TMOs, such as MnO 2 , NiO, Co 3 O 4 , and CuO, have been extensively studied as the electrode materials for SCs [49][50][51][52][53][54]. Moreover, multiple-metal TMOs, such as NiCo 2 O 4 , NiCoO 2 , and ZnV 2 O 4 , have also attracted considerable interest because these materials can provide better electrochemical performance compared with single-metal TMOs [55][56][57].…”

“…Moreover, multiple-metal TMOs, such as NiCo 2 O 4 , NiCoO 2 , and ZnV 2 O 4 , have also attracted considerable interest because these materials can provide better electrochemical performance compared with single-metal TMOs [55][56][57]. TMOs with a variety of structures and morphologies, such as thin films, nanowires/nanorods, nanotubes, nanosheets, nanoflowers, and hollow nanospheres, have been fabricated via different synthesis routes [49][50][51][52][53][54][55][56][57][58][59][60]. Moreover, their electrochemical properties have been extensively investigated.…”