A novel deodorizer that is capable of selectively eliminating the odorous chemicals, such as ammonia, trimethylamine, hydrogen sulfide and methyl mercaptan, is described. The deodorizer is a nanostructured aerogel by nature, consisting of 2,2-6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidized cellulose nanofibrils (CNF), transition metal divalent cations (M²⁺), and multi-walled carbon nanotubes (CNT) as the constitutive elements. CNF are firstly mixed with M²⁺ (M²⁺, in this paper, typifies Ni²⁺, Co²⁺ and Cu²⁺) to form CNF-M²⁺ complexes, monodispersed CNT is then mixed to prepare CNT/CNF-M²⁺ waterborne slurries; CNT/CNF-M²⁺ hybridized aerogels are finally obtained via freezing-drying of the CNT/CNF-M²⁺ waterborne slurries. The CNT/CNF-M²⁺ aerogels are a foam-like structure consisting of CNF and CNT as backbones and M²⁺ as linkers. The aerogels show higher capabilities (in comparison with activated carbon) for selectively adsorbing ammonia, trimethylamine, hydrogen sulfide and methyl mercaptan. Computing simulations suggest a theoretical conclusion that the odorous chemicals are absorbed in a preferring manner of bimolecular absorptions via the M²⁺ moieties. The CNT/CNF-M²⁺ hybridized aerogels are lightweight, eco-friendly, and easy to produce in industrial scales. Our new finding, as is described in this paper, demonstrates potential applications of the TEMPO-oxidized CNF to the field of deodorizations.

描述了一种新型的除臭剂，该除臭剂能够选择性地消除诸如氨，三甲胺，硫化氢和甲硫醇之类的臭味化学物质。除臭剂本质上是一种纳米结构的气凝胶，由2,2-6,6-四甲基哌啶-1-氧基（TEMPO）氧化纤维素纳米纤维（CNF），过渡金属二价阳离子（M ²⁺）和多壁碳纳米管组成（CNT）作为构成元素。首先将CNF与M ²⁺（M ²⁺，以Ni 2 ⁺，Co ²⁺和Cu ^2+代表）混合形成CNF-M ²⁺络合物，然后将单分散的CNT混合以制备CNT / CNF- M ²⁺水性浆料；碳纳米管/ CNF-M最终通过CNT / CNF-M ²⁺水性浆料的冷冻干燥获得²⁺混合气凝胶。CNT / CNF-M ²⁺气凝胶是一种泡沫状结构，由CNF和CNT作为主链，M ²⁺作为连接体。气凝胶显示出更高的能力（与活性炭相比），能够选择性地吸附氨，三甲胺，硫化氢和甲硫醇。计算模拟表明一个理论结论，即有气味的化学物质通过M ²⁺部分以一种优选的双分子吸收方式被吸收。CNT / CNF-M ²⁺混合气凝胶重量轻，环保，易于工业规模生产。如本文所述，我们的新发现证明了TEMPO氧化CNF在除臭领域的潜在应用。