Antifouling Wood Matrix with Natural Water Transfer and Microreaction Channels for Water Treatment

Abstract

Wood with abundant nutrition transport channels could be considered as a kind of natural water purifier due to quick and effective passages for separation. Nevertheless, microporosity as the main porous structure of initial wood is not enough to effectively separate small molecules, such as organic dye pollutants. Meanwhile, like most filters, the fouling resulting in blocking and poor water flux will also restrict their large scale. Here, we incorporate Fenton-like catalysis based on Mn3O4 loading for degradation of methylene blue with water transfer and separation channel of fir wood (the interfacial area was estimated up to 6 × 104 m2/m3) to solve the low separating efficiency and fouling problem. The results show that the wood matrix treated by hydrothermal carbonization loading with Mn3O4 nanoparticles (Mn3O4/TiO2/wood) exhibited remarkable catalytic efficiency on methylene blue (MB) moles degradation and the fouling problem could be significantly alleviated during Fenton-like catalysis. The turnover frequency of the wood matrix is 6.072 × 10–3 molMB·molMn3O4 –1·min–1, which is much higher than the values reported in the literature. The flux maintained approached 2045 L·m–2·h–1 with a high rejection rate of more than 95%. Wood with natural interconnected micropores as the main fluid transfer and microreaction channels is a promising material for construction of parallel-series microreactors, to apply to some vital chemical process besides sewage purification and desalination.

Facile in-situ growth of Ag/TiO2 nanoparticles on polydopamine modified bamboo with excellent mildew-proofing

“…As shown in Fig. S4a, there is a typical characteristic peak of cellulose crystal at 16.5° and 22.5° for initial bamboo 39 . For TiO 2 /PDA-bamboo and Ag/TiO 2 /PDA-bamboo samples, these two characteristic peaks are weakened as the coverage of PDA coating and nanoparticles.…”

Advanced Nanowood Materials for the Water–Energy Nexus

“…Highly reactive hydroxyl radicals were generated when H 2 O 2 was in contact with Mn 3 O 4 , which led to a turnover frequency of 0.006 mol MB mol Pd −1 min −1 , which is quite high among Mn 3 O 4 based materials but still much lower than previously mentioned reducing process (≈2 mol MB mol Pd −1 min −1 ) (Figure 4c–g). [ 57 ] Another study used a similar approach by making a hybrid material composed of Fe–Mn–O nanosheet and wood carbon using carbonized basswood. [ 32 ] This Fenton‐like hybrid catalyst accomplished more than 95% degradation when treating 20 ppm MB.…”

Relationship between pore structure and gas permeability in poplar (Populus deltoides CL.’55/65’) tension wood

“…Permeability measurements in the axial direction were carried out using self-designed and manufactured experimental apparatus (Appendix Fig. 9) (Liu et al 2019) with air and nitrogen gas as the fluid medium. The devices were designed according to Darcy's law as fluids generally follow this law when passing through wood (Hansmann et al 2002).…”