在這次研究裡，成功地製備出TEMPO氧化纖維素奈米纖維(TOCNF)。鉑奈米粒子由胺基封端的第四代聚酰氨基胺樹狀聚合物安定(DEN(PNP)s)，並使用縮合劑來促使TEMPO氧化纖維素奈米纖維和DEN(PNP)s之間形成酰胺鍵。接著使用TOCNF/DEN(PtNP)s的膠體溶液進行過濾，並將其薄膜乾燥後測其特性。
所製備的TOCNF/DEN(PtNP)s薄膜具有高催化分解甲醛的能力，我們基於漢奇反應(Hantzsch reaction)來檢測薄膜中吸附的甲醛濃度。甲醛經過該反應後會產生3,5-二乙酰基-1,4-二氫啶(DDL)，溶液則由無色變成黃色，甲醛濃度會影響溶液顏色深淺，其可通過紫外可件吸收光譜來檢測，DDL的吸光度出現在波長為413奈米的時候，並將其和甲醛濃度之間的關係測定校正曲線，得到吸光度和甲醛濃度呈線性的關係，如此可以用比爾-朗伯定律來計算薄膜中未知的甲醛濃度。
其結果表明以[鉑前體] : [胺基在樹狀聚合物] = 0.5 : 1的混合比例製備DEN(PNP)s是較適當的，鉑奈米粒子可以成功的分解甲醛分子。

In this work, we have successfully prepared the TEMPO-oxidized cellulose nanofiber (TOCNF). Platinum nanoparticles stabilized by an NH2-terminated fourth generation poly(amido amine) dendrimer (DEN(PtNP)s) were covalently immobilized on 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized cellulose nanofiber (TOCNF) by using a condensing agent for amide bond formation between TOCNF and DEN(PtNP)s. Subsequently, the films with different concentrations of DEN(PtNP)s were prepared by filtrating TOCNF/DEN(PtNP)s suspensions on filter membranes, and the dried films were characterized. As-prepared TOCNF/DEN(PtNP)s film possessed the high catalytic efficiency to decomposition of formaldehyde (HCHO). The detection of formaldehyde is based on the Hantzsch reaction. This reaction involves the cyclization of 2,4-pentanedione and the formation of 3,5-diacetyl-1,4-dihydrolutidine (DDL), which can be detected by UV-vis absorption spectra. The relationship between absorbance of DDL at 413 nm and concentration of formaldehyde were determined on calibration curve, which was followed Beer–Lambert law.
The results indicate that the DEN(PtNP)s prepared at the mixing ratio of [Pt-precursor] : [NH2 group in dendrimer] = 0.5 : 1 was adequate. Then the Pt nanoparticles could decompose successfully the HCHO molecules.

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