School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
J Colloid Interface Sci. 2020 Mar 1;561:46-57. doi: 10.1016/j.jcis.2019.11.120. Epub 2019 Dec 2.
Increasing the surface area and active sites of adsorbent for hexavalent chromium removal in water is considered an effective and efficient way to enhance reduction and adsorption performance. Here 2D/0D heterojunction of TiC MXenes/TiO nanoparticles with different amounts of TiO were synthesized using a one-step hydrothermal method and the reduction and adsorption of Cr (VI) at different pH values of composite material were analyzed. The results show that the TiC/TiO composite material allows significantly enhanced removal ability of toxic Cr (VI) in water, compared to pure TiC nanosheets. The effective removal of Cr (VI) in water was 99.35%. The TiC/TiO composite can not only rapidly and efficiently remove Cr (VI) from potassium dichromate solution by reducing Cr (VI) to Cr (III), but simultaneously adsorbs the reduced Cr (III). Therefore, the 2D/0D heterojunction of TiC MXenes/TiO nanoparticles has potential application prospects in the reduction adsorption of Cr (VI).
增加吸附剂的表面积和活性位点以去除水中的六价铬被认为是一种有效且高效的方法，可以增强还原和吸附性能。在这里，使用一步水热法合成了具有不同量 TiO 的二维/零维异质结 TiC MXenes/TiO 纳米粒子，并分析了复合材料在不同 pH 值下对 Cr(VI)的还原和吸附。结果表明，与纯 TiC 纳米片相比，TiC/TiO 复合材料对水中有毒 Cr(VI)的去除能力显著增强。水中 Cr(VI)的有效去除率达到 99.35%。TiC/TiO 复合材料不仅可以通过将 Cr(VI)还原为 Cr(III)，快速有效地从重铬酸钾溶液中去除 Cr(VI)，而且还可以吸附还原后的 Cr(III)。因此，TiC MXenes/TiO 纳米粒子的二维/零维异质结在 Cr(VI)的还原吸附方面具有潜在的应用前景。
