Hollow Mesoporous Carbon Nanospheres Loaded with Pt Nanoparticles for Colorimetric Detection of Ascorbic Acid and Glucose,ACS Applied Energy Materials

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Hollow Mesoporous Carbon Nanospheres Loaded with Pt Nanoparticles for Colorimetric Detection of Ascorbic Acid and Glucose
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-14 00:00:00 , DOI: 10.1021/acsanm.0c00638
Haitao Chen _{1,

2} , Chenyi Yuan ₂ , Xuanyu Yang ₂ , Xiaowei Cheng ₂ , Ahmed A. Elzatahry ₃ , Abdulaziz Alghamdi ₄ , Jiacan Su ₅ , Xing He ₁ , Yonghui Deng _{2,

6}

Affiliation

With the rapid development of nanotechnology and catalysis science, numerous enzyme-mimicking nanomaterials have been rationally designed as the substitutes for natural enzymes. Herein, the Pt-loaded hollow mesoporous carbon nanospheres (Pt-HMCNs) were proposed as the peroxidase mimic for the first time. The monodispersed HMCNs with huge hollow cavity and mesoporous carbon skeleton were first synthesized via high-temperature carbonization and NaOH etching of core–shell structured SiO₂@RF/SiO₂ (RF = resorcinol–formaldehyde resin) nanospheres, which were prepared through a simple surfactant-free strategy in a one-pot system only containing three main raw chemicals as tetraethyl orthosilicate, resorcinol, and formaldehyde. And then the Pt-HMCNs were obtained through surface graft of −NH₂ groups and loading of as-synthesized ultrasmall Pt nanoparticles (NPs) in size of 1–3 nm on the HMCNs. The prepared Pt-HMCNs nanocomposites exhibited superior peroxidase-like catalytic activity toward the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) substrate, which owned stronger affinity to H₂O₂ and TMB as substrates than the natural enzyme (horseradish peroxidase). The outstanding peroxidase-mimic performance of the Pt-HMCNs is due to the unique hollow mesoporous structure as well as the interfacial effect between Pt NPs and carbon skeleton. A simple and general colorimetric approach was established to accurately detect ascorbic acid (AA) and glucose, and their detection limits were calculated to be 3.29 and 35.4 μM, respectively. Besides, wide linear range and high selectivity against interfering substances were also achieved in this assay during AA and glucose detection based on the Pt-HMCNs catalyst. The colorimetric method built on Pt-HMCNs in this work could be applied to biomedicine, food science, environment monitoring, and other fields for accurately detecting ascorbic acid, glucose, and other important substances in some complex systems.

中文翻译：

负载Pt纳米粒子的中空碳纳米球用于比色法检测抗坏血酸和葡萄糖

随着纳米技术和催化科学的飞速发展，已经合理设计了许多模仿酶的纳米材料作为天然酶的替代品。在本文中，首次提出了载有Pt的中孔碳纳米球（Pt-HMCN）作为过氧化物酶的模拟物。首先通过高温碳化和NaOH蚀刻核壳结构SiO ₂ @ RF / SiO ₂（RF =间苯二酚-甲醛树脂）纳米球，首先合成具有巨大空腔和中孔碳骨架的单分散HMCN。一锅系统中不含表面活性剂的策略，仅包含三种主要的化学原料，如原硅酸四乙酯，间苯二酚和甲醛。然后通过-NH表面接枝得到Pt-HMCNs在HMCN上分为₂组，并装入大小为1-3 nm的合成超小Pt纳米颗粒（NP）。制备的Pt-HMCNs纳米复合材料对3,3'，5,5'-四甲基联苯胺（TMB）底物的氧化表现出优异的过氧化物酶样催化活性，该底物对H ₂ O ₂具有更强的亲和力和TMB作为底物比天然酶（辣根过氧化物酶）高。Pt-HMCN出色的过氧化物酶模拟性能是由于独特的中空介孔结构以及Pt NP与碳骨架之间的界面作用。建立了一种简单而通用的比色方法来准确检测抗坏血酸（AA）和葡萄糖，其检出限分别为3.29和35.4μM。此外，在基于Pt-HMCNs催化剂的AA和葡萄糖检测过程中，该分析还实现了宽线性范围和对干扰物质的高选择性。基于Pt-HMCN的比色法可用于生物医学，食品科学，环境监测等领域，以准确检测抗坏血酸，葡萄糖，

更新日期：2020-04-14

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