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g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料的制备及催化果糖脱水制5-羟甲基糠醛的研究
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作者 邵梦莎 洪雯雯 +3 位作者 刘思乐 张申奥 王思祺 李金源 《化工科技》 CAS 2024年第3期18-25,共8页
采用水热法制备g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料,并将其应用于果糖脱水制备5-羟甲基糠醛(5-HMF)。利用SEM、TEM、XRD、FTIR、BET等检测手段对g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料的形貌、晶型、基团和比表面积进行了表征,同时... 采用水热法制备g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料,并将其应用于果糖脱水制备5-羟甲基糠醛(5-HMF)。利用SEM、TEM、XRD、FTIR、BET等检测手段对g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料的形貌、晶型、基团和比表面积进行了表征,同时研究了反应温度、反应时间、催化剂用量及溶剂种类对果糖转化率、5-HMF的收率和选择性的影响,此外,还考察了催化剂的稳定性。结果表明,g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料具有三维立体网状结构,比表面积达到了31.4782 m^(2)/g,对果糖脱水反应具有良好的催化活性;在果糖质量为5.0 g、二甲基亚砜用量15 mL、g-C_(3)N_(4)/TiO_(2)/RGO用量1.0 g、反应时间3 h、反应温度150℃的条件下,果糖的转化率为98.5%,5-HMF的收率为69.7%,选择性为70.8%;5次循环使用后,5-HMF的收率仍能达到58.8%,表明g-C_(3)N_(4)/TiO_(2)/RGO三元复合材料的催化稳定性良好。 展开更多
关键词 g-c_(3)n_(4)/tio_(2)/rgo三元复合材料 水热法 5-羟甲基糠醛 果糖
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Photocatalytic Performance and Mechanism Study of High Specific Area TiO_(2) Combined with g-C_(3)N_(4) 被引量:2
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作者 Mu-yao Song De-wu Sun +8 位作者 Ren-quan Guan Jia-xin Li Hong-ju Zhai Li-jing Wang Mao-yu Sun Jing-wen Kang Jun-kai Zhang Zhao Zhao Xiao-hui Li 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2021年第2期210-216,I0002,共8页
g-C_(3)N_(4) coupled with high specific area TiO_(2)(HSA-TiO_(2))composite was prepared by a simple solvothermal method,which was easy to operate with low energy consumption.Degradation of methyl orange test results s... g-C_(3)N_(4) coupled with high specific area TiO_(2)(HSA-TiO_(2))composite was prepared by a simple solvothermal method,which was easy to operate with low energy consumption.Degradation of methyl orange test results showed that HSA-TiO_(2) effectively improved the photocatalytic activity effectively.Photoelectrochemical test results indicated that the separation of photo-generated carriers and the charge carrier migration speed of TiO_(2) were improved after combination with g-C_(3)N_(4).g-C3N4/HSA-TiO_(2) showed strong photocatalytic ability.The degree of degradation of methyl orange by 6%-g-C_(3)N_(4)/HSA-TiO_(2) could reach up to 92.44%.Furthermore,it revealed good cycle performance.The photocatalytic mechanism of g-C_(3)N_(4)/HSA-TiO_(2) was proposed. 展开更多
关键词 g-c_(3)n_(4)/tio_(2)composites PHOTOCATALYST Photocatalytic mechanism Degra-dation
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