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TiO2/Lignin-Based Carbon Composited Photocatalysts for Enhanced Photocatalytic Conversion of Lignin to High Value Chemicals
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-10-07 00:00:00 , DOI: 10.1021/acssuschemeng.8b02353 Nattida Srisasiwimon 1, 2 , Surawut Chuangchote 3 , Navadol Laosiripojana 1, 2 , Takashi Sagawa 4
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-10-07 00:00:00 , DOI: 10.1021/acssuschemeng.8b02353 Nattida Srisasiwimon 1, 2 , Surawut Chuangchote 3 , Navadol Laosiripojana 1, 2 , Takashi Sagawa 4
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Upgrading of biomass wastes to be value-added materials has been attempted to apply in various applications. One of the interesting challenges is the effort to utilize biomass wastes to modify metal oxides to form composited photocatalysts to enhance the photoabsorption on the resultant catalysts. In this work, lignin-based carbon was used to modify TiO2 and form the composite photocatalyst (TiO2/lignin). A sol–gel microwave technique was used to prepare these catalysts. The effects of lignin-based carbon modification were investigated on their morphology, crystal structure, surface structure, optical properties, and photocatalytic activity. Characterizations of the obtained catalysts, including field emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, UV–visible diffuse reflectance spectroscopy, photoluminescence, N2 adsorption analyzed by the Brunauer–Emmett–Teller method, and UV–vis spectroscopy, were carried out. Here, lignin not only was used as a natural carbon source for modification of TiO2 but also can be used as the biomass resource for green chemical production. Enhancement of photocatalytic performance of TiO2 by carbon from sintered lignin was investigated from conversion of lignin to high value chemicals. It was found that carbon from lignin improved UVA irradiation photocatalytic performance of the TiO2/lignin composite compared with the pristine TiO2. The TiO2/lignin composite with a TiO2 to lignin ratio of 1:0.5 presented good characteristics and showed the highest photocatalytic activity under UVA irradiation for 5 h. After identification by gas chromatography mass spectroscopy, high value chemicals, such as vanillin, were found after photocatalysis.
中文翻译：
TiO 2 /木质素基碳复合光催化剂，用于增强木质素向高价值化学品的光催化转化
已经尝试将生物质废物升级为增值材料，以应用于各种应用中。有趣的挑战之一是努力利用生物质废物来改性金属氧化物以形成复合光催化剂，以增强在所得催化剂上的光吸收。在这项工作中，木质素基碳用于修饰TiO 2并形成复合光催化剂（TiO 2/ lignin）。溶胶-凝胶微波技术用于制备这些催化剂。研究了木质素基碳改性对它们的形态，晶体结构，表面结构，光学性质和光催化活性的影响。获得的催化剂的特征包括场发射扫描电子显微镜，高分辨率透射电子显微镜，X射线衍射，傅里叶变换红外光谱，紫外可见漫反射光谱，光致发光，由Brunauer-Emmett-Teller分析的N 2吸附方法和紫外可见光谱法。在这里，木质素不仅被用作改性TiO 2的天然碳源。还可作为绿色化工生产的生物质资源。的二氧化钛光催化性能的提高2通过由烧结碳木质素从木质素转化为高价值化学品的影响。发现与原始TiO 2相比，来自木质素的碳改善了TiO 2 /木质素复合物的UVA照射光催化性能。TiO 2与木质素之比为1：0.5的TiO 2 /木质素复合材料表现出良好的特性，并在UVA照射5 h下表现出最高的光催化活性。通过气相色谱质谱法鉴定后，在光催化后发现了高价值的化学品，如香兰素。
更新日期：2018-10-07
中文翻译：
TiO 2 /木质素基碳复合光催化剂，用于增强木质素向高价值化学品的光催化转化
已经尝试将生物质废物升级为增值材料，以应用于各种应用中。有趣的挑战之一是努力利用生物质废物来改性金属氧化物以形成复合光催化剂，以增强在所得催化剂上的光吸收。在这项工作中，木质素基碳用于修饰TiO 2并形成复合光催化剂（TiO 2/ lignin）。溶胶-凝胶微波技术用于制备这些催化剂。研究了木质素基碳改性对它们的形态，晶体结构，表面结构，光学性质和光催化活性的影响。获得的催化剂的特征包括场发射扫描电子显微镜，高分辨率透射电子显微镜，X射线衍射，傅里叶变换红外光谱，紫外可见漫反射光谱，光致发光，由Brunauer-Emmett-Teller分析的N 2吸附方法和紫外可见光谱法。在这里，木质素不仅被用作改性TiO 2的天然碳源。还可作为绿色化工生产的生物质资源。的二氧化钛光催化性能的提高2通过由烧结碳木质素从木质素转化为高价值化学品的影响。发现与原始TiO 2相比，来自木质素的碳改善了TiO 2 /木质素复合物的UVA照射光催化性能。TiO 2与木质素之比为1：0.5的TiO 2 /木质素复合材料表现出良好的特性，并在UVA照射5 h下表现出最高的光催化活性。通过气相色谱质谱法鉴定后，在光催化后发现了高价值的化学品，如香兰素。
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