Page 103 - 《精细化工》2022年第3期
P. 103

第 39 卷第 3 期                             精   细   化   工                                  Vol.39, No.3
             2022 年 3 月                              FINE CHEMICALS                                 Mar.  2022


              功能材料
                N-TiO /Ti C 复合材料的原位合成及其光催化性能
                                      2
                                  3
                           2
                                       1
                                                   1
                                                                2
                                                                                          1*
                                                                             1
                              张   倩 ,王英迪 ,高   峰 ,董玉明 ,刘   湘
                 (1.  江南大学  化学与材料工程学院,江苏  无锡  214122;2.  江苏蓝必胜化工环保股份有限公司,江苏  无
                 锡  214222)
                 摘要:以钛碳化铝、氢氟酸、氟硼酸钠为原料,尿素为氮源,通过简单的溶剂热反应,在高导电性的 Ti 3 C 2  MXenes
                 (二维过渡金属碳化钛)纳米片上原位生长氮元素掺杂的 TiO 2 纳米片,合成了二维 N-TiO 2 /Ti 3 C 2 复合材料。采

                 用 XRD、SEM、TEM、XPS、UV-Vis DRS、PL 对其进行了结构表征。结果表明,在可见光照射下,N-TiO 2 /Ti 3 C 2
                 复合材料对罗丹明 B(RhB)的降解速率是纯 TiO 2 的 6.94 倍,在 150 min 内,RhB 降解率达到 96.3%。N-TiO 2 /
                 Ti 3 C 2 复合材料较好的光催化降解性能主要归因于氮元素的掺杂缩小了 TiO 2 的带隙,将光响应范围扩展到可
                 见光区域。同时,TiO 2 纳米片的原位生长使其与具有优异电导率的 Ti 3 C 2  MXenes 纳米片形成了紧密的接触界面,
                                              –
                 促进了光生载流子的分离和迁移。•O 2 和•OH 是 N-TiO 2 /Ti 3 C 2 复合材料光催化降解 RhB 的主要活性物种。此外,
                 该复合材料具有良好的稳定性和可重复利用性。
                 关键词:TiO 2 纳米片;元素掺杂;二维过渡金属 Ti 3 C 2 ;可见光催化;降解;罗丹明 B;功能材料
                 中图分类号:X703;TQ426;O643.3      文献标识码:A      文章编号:1003-5214 (2022) 03-0525-08


                              In-situ synthesis and photocatalytic performance of

                                              N-TiO 2/Ti 3C 2 composite

                                       1
                                                                  2
                                                                                 1
                                                                                             1*
                                                      1
                           ZHANG Qian , WANG Yingdi , GAO Feng , DONG Yuming , LIU Xiang
                 (1. School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China; 2. Jiangsu Lason
                 Chemical Environmental Protection Co., Ltd., Wuxi 214222, Jiangsu, China)
                 Abstract: Using aluminum titanium carbide, hydrofluoric acid and sodium fluoroborate as raw materials
                 and urea as nitrogen source, two-dimensional N-TiO 2/Ti 3C 2 composite was synthesized by in situ growth of
                 nitrogen-doped TiO 2 nanosheets on Ti 3C 2 MXenes (two-dimensional transition metal Ti 3C 2) nanosheets with
                 high conductivity through simple  solvothermal reaction. The sample  was characterized by  XRD,  SEM,
                 TEM, XPS, UV-Vis DRS and PL. The results showed that the degradation rate constant of N-TiO 2/Ti 3C 2
                 composite to rhodamine B (RhB) under visible light irradiation was 6.94 times that of pure TiO 2, and the
                 degradation rate of RhB was 96.3% within 150 min. The better photocatalytic performace of N-TiO 2/Ti 3C 2
                 composite was mainly attributed to the reduction of the band gap of TiO 2  by the doping of nitrogen element
                 and the extension of the light response range to the visible light region. At the same time, the in situ growth
                 of TiO 2 nanosheets made it form a close contact interface with Ti 3C 2 MXenes nanosheets with excellent
                                                                                                    –
                 electrical conductivity, which promoted the separation and migration of photogenerated carriers. •O 2  and
                 •OH were the main active species for RhB degradation in the N-TiO 2/Ti 3C 2  photocatalytic system. In addition,
                 the composite possessed good stability and reusability.
                 Key words: TiO 2  nanosheets; element doping; Ti 3C 2  MXenes; visible-light catalysis; degradation; rhodamine
                 B; functional materials




                 收稿日期:2021-08-24;  定用日期:2021-12-03; DOI: 10.13550/j.jxhg.20210859
                 基金项目:国家自然科学基金(21676123)
                 作者简介:张   倩(1996—),女,硕士生,E-mail:2267056318@qq.com。联系人:刘   湘(1964—),男,教授,E-mail:liuxiang@
                 jiangnan.edu.cn。
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