Microwave Solvothermal Fabrication of Zirconia Hollow Microspheres with Different Morphologies Using Pollen Templates and Their Dye Adsorption Removal

Abstract

Both porous and scale-like wall zirconia (ZrO2) hollow microspheres were successfully prepared through a facile and mild microwave solvothermal method using the rape pollen as biotemplates. The formation mechanisms were discussed for both ZrO2 hollow microspheres fabricated using pollen biotemplate with different pollen treatments. The porous ZrO2 hollow microspheres had a specific surface area of 40.92 m2·g–1, significantly higher than scale-like wall ZrO2 hollow microspheres (24.79 m2·g–1) and ZrO2 particles (27.99 m2·g–1). The adsorption test results showed that porous ZrO2 hollow microspheres had a higher adsorption capability (96.98 g·mg–1) than scale-like wall ZrO2 hollow microspheres (38.55 g·mg–1) and ZrO2 particles (32.03 g·mg–1) for Congo red. The adsorption followed pseudo-second-order kinetics, and the adsorption process was homogeneous adsorption of monolayer.

Hydroxymethylation of technical lignins from South American sources with potential use in phenolic resins

“…On the other hand, the design and the use of various functional biomaterials for drug loading and release in the development of electro‐stimulated drug release devices have become in a promising trend using bacterial cellulose or chitosan nanocapsules . Green adsorbents based on cellulose or carbon nanocomposites are another promising area . During the recent years, a noticeable growth in the demand of wearable bioelectronic devices, which can monitor motions, was registered.…”

Magnetic Hollow Biocomposites Prepared from Lycopodium clavatum Pollens as Efficient Recyclable Catalyst

“…Thermogravimetric analyses (TGA) of LC and MgBCs are displayed in Figure b. The TGA curve of LC exhibited that the pollenin decompose in three steps within the temperature range of 30–900 °C . The first mass loss of 4.54 % in the temperature region from 30–150 °C can be attributed to the loss of water .…”

“…The TGA curve of LC exhibited that the pollenin decompose in three steps within the temperature range of 30–900 °C . The first mass loss of 4.54 % in the temperature region from 30–150 °C can be attributed to the loss of water . The second mass loss (51.05 %) takes place rapidly between 200–400 °C, and followed by the final mass loss of 30.02 % at 400–900 °C, corresponding to the main degradation of LC with the elimination of volatile organic compounds .…”

Research Progress in the Field of Adsorption and Catalytic Degradation of Sewage by Hydrotalcite‐Derived Materials

“…This fails to meet the discharge standards and causes severe damages to the water environment. For a long term, it will deteriorate the water quality, and even damages the natural environment and human health …”

“…In industrial production and daily human life, there are four main sources of sewage, including printing and dyeing sewage, organic sewage, heavy metal ion sewage and agricultural sewage . Among them, printing and dyeing sewage is one of the refractory sewages.…”