One-Pot Efficient Catalytic Oxidation for Bio-Vanillin Preparation and Carbon Isotope Analysis
One-Pot Efficient Catalytic Oxidation for Bio-Vanillin Preparation and Carbon Isotope Analysis
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DOI：
10.1021/acsomega.0c00370
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发表时间：
2020-04-21
期刊：
影响因子：
4.1
通讯作者：
Liu, Jibo
中科院分区：
文献类型：
--
作者：
Mao, Haifang;Wang, Hongzhao;Liu, Jibo
香草醛（4-羟基-3-甲氧基苯甲醛）是应用最广泛的食品香料之一。以生物香草醛绿色生产为目标，采用非贵金属氧化复合催化剂（NiCo 2 O 4/SiO2纳米粒子），在低O2压（0.035 MPa）下，一锅法直接催化氧化天然原料，具有合成路线短、工业废弃物少等显著优点。该催化体系对多种天然底物具有较好的普适性，转化率接近100%，生物香兰素产率为86.3%。更重要的是，采用碳同位素比调查来验证有机质的来源。结果表明，该方法可以有效地鉴别生物质和化石材料中的香草醛，并可用于生物质和化石材料中香草醛的分离。此外，C-13同位素检测显示出有效的区分能力，从一个特定的生物质来源的香草醛。碳同位素检测为商品香兰素的鉴定提供了一种有效的方法。
Vanillin (4-hydroxy-3-methoxybenzaldehyde) is one of the most widely used food spices. Aimed at bio-vanillin green production, the natural materials were directly catalytically oxidized efficiently in one pot under low O-2 pressure (0.035 MPa) in the presence of a non-noble metal oxidation combined catalyst (NiCo2O4/SiO2 nanoparticles), which showed remarkable advantages of a short synthetic route and less industrial waste. The catalytic system showed good universality to many natural substrates with nearly 100% conversion and 86.3% bio-vanillin yield. More importantly, carbon isotope ratio investigations were employed to verify the origin of the organic matter. One hundred percent C-14 content of the obtained vanillin was detected, which indicated that it was an efficient method to distinguish the vanillin from biomass or fossil materials. Furthermore, the C-13 isotope examination showed effective distinguishing ability for the vanillin from a particular biomass source. The C isotope detection provides an effective method for commercial vanillin identification.