Synthesis of Pt-Loaded NiFe-LDH Nanosheets on Wood Veneer for Efficient Gaseous Formaldehyde Degradation

Abstract

Traditional methods of removing gaseous formaldehyde are often associated with high energy consumption and secondary pollution. In this study, a new wood veneer-based composite decorated with Pt-loaded NiFe-LDH nanosheets is successfully developed by a hydrothermal reaction and impregnation-chemical reduction. NiFe-LDH nanosheets as an adsorbent can capture formaldehyde molecules through their abundant hydroxyl groups. Pt nanoparticles as catalytic centers are evenly distributed on the surface of NiFe-LDH to excite the O atoms linked to NiFe-LDH and absorbed oxygen, which will further attack the absorbed formaldehyde molecules to generate CO 2 and H 2 O. And the wood veneer not only increases the active area of the catalyst by endowing it with good dispersion but also provides convenient channels for reactants and products. In a simulated dark environment at room temperature, this synthetic wood veneer-based composite exhibits admirable catalytic activity, which can effectively degrade almost all gaseous formaldehyde with the initial concentration of 0.2 mg m −3 in 30 min and maintain a high catalytic activity of ≥97% after 10 cycles. This paper presents a feasible strategy for synthesizing an energy-efficient and ecofriendly wood veneer-based composite for efficient gaseous formaldehyde degradation at room temperature, which may play an important role in indoor air purification as a promising decorative material.

Surface Lattice Oxygen Activation by Nitrogen-Doped Manganese Dioxide as an Effective and Longevous Catalyst for Indoor HCHO Decomposition

“…Catalytic oxidation is the most effective means to remove HCHO, and can completely convert HCHO into harmless CO 2 and H 2 O at low temperatures. , Noble metal catalysts (such as Pt or Pd) have been reported to achieve significant HCHO removal activity. − However, high cost and scarcity limit their widespread application. So far, significant development has been made in the research on transition metal oxide catalysts.…”

Introducing Polyhydroxyurethane Hydrogels and Coatings for Formaldehyde Capture

“…The catalytic oxidation uses noble-metal or oxide catalysts embedded within (in)­organic or metallic matrices, , and also turns FA into CO 2 and water. Although promising, room-temperature degradation of FA is only possible with some expensive noble-metal catalysts − and their efficiency was not proven at a low FA concentration (<ppm). , (Photo)­catalytic oxidation methods are however nonselective to FA and degrade any organic compounds with the formation of radicals able to react with other substances with the risk of formation of harmful byproducts. , On the other hand, the enzymatic bioremediation is highly selective to FA and can convert this waste into nontoxic products under ambient conditions. In this field, compost extracts, i.e., FA-degrading microorganisms like fungi , or bacteria, or purified specific enzymes were employed for FA abatement .…”

Ultrathin Ni/V-layered double hydroxide nanosheets for efficient visible-light-driven photocatalytic nitrogen reduction to ammonia

“…LDHs, as a typical layered two-dimensional nanomaterial possess great development potential [15,16]. Through the efforts of researchers, the LDHs composites as photocatalysts were applied in photocatalytic technology to decompose water for producing hydrogen [17][18][19], fix nitrogen [20][21][22], reduce carbon dioxide [23][24][25], and degrade harmful substances [26][27][28], which has made great progress.…”