Ti_(3)C_(2)T_(x)纳米片用于增强Cd_(0.8)Zn_(0.2)S纳米材料的光催化制氢性能研究  

Ti_(3)C_(2)T_(x) Nanosheets Co-Catalyst on Cd_(0.8)Zn_(0.2)S Nanomaterials for Enhanced Photocatalytic Hydrogen Production

作　　者：许堡荣 侯雪兰 卫鈿 杨贵东 XU Baorong;HOU Xuelan;WEI Tian;YANG Guidong(School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China;Shaanxi Hydrogen Energy Research Institute Company Limited,Xi’an 712046,China)

机构地区：[1]西安交通大学化学工程与技术学院,陕西西安710049 [2]陕西氢能研究院有限公司,陕西西安712046

出　　处：《化学反应工程与工艺》2025年第1期207-215,共9页Chemical Reaction Engineering and Technology

基　　金：国家重点研发计划(2020YFA0710000);国家自然科学基金联合基金项目(U22A20391);国家自然科学基金面上项目(22078256);陕西省催化反应工程创新团队(2023-CX-TD-26);国家资助博士后研究人员计划(GZC20241355)。

摘　　要：探索高效、低成本的助催化剂以提高光催化制氢性能,在能源利用技术发展中具有重要的意义。本研究以Ti_(3)AlC_(2)为原料,通过选择性刻蚀方法及随后的液相剥离过程,成功制备了二维Ti_(3)C_(2)T_(x)纳米片。采用经典的水热法,在Ti_(3)C_(2)T_(x)纳米片表面原位修饰了Cd_(0.8)Zn_(0.2)S纳米颗粒,合成了一种新型的异质结光催化剂。得益于Ti_(3)C_(2)T_(x)纳米片优异的电子传输作用,所制备的Cd_(0.8)Zn_(0.2)S/Ti_(3)C_(2)T_(x)纳米材料表现出较强的光生空穴-电子对分离与迁移能力,并展现出优异的光催化析氢活性。在可见光照射下,Cd_(0.8)Zn_(0.2)S/Ti_(3)C_(2)T_(x)纳米材料的产氢速率可达1954.2μmol/(g·h),是相同条件下纯Cd_(0.8)Zn_(0.2)S纳米材料的4.2倍。Exploring efficient and cost-effective co-catalysts to improve the performance of photocatalytic hydrogen production is crucial for advancing solar energy utilization technology.In this work,two-dimensional Ti_(3)C_(2)T_(x) nanosheets were successfully prepared through a selective etching method followed by a liquid-phase exfoliation process with Ti_(3)AlC_(2) as the precursor material.Based on this as-synthesized material,we further built a novel heterojunction photocatalyst by decorating Ti_(3)C_(2)T_(x) with Cd_(0.8)Zn_(0.2)S nanoparticles using a conventional hydrothermal method.Taking advantage of the good electronic conductivity of Ti_(3)C_(2)T_(x) nanosheets,the resulting Cd_(0.8)Zn_(0.2)S/Ti_(3)C_(2)T_(x) nanomaterial exhibited superior separation and migration abilities of photoexcited electron-hole pairs,leading to a notable increase in hydrogen evolution activity.Under visible light irradiation,the Cd_(0.8)Zn_(0.2)S/Ti_(3)C_(2)T_(x) photocatalyst displayed a remarkable hydrogen evolution rate of 1954.2μmol/(g·h),which was 4.2 times higher than that of pristine Cd_(0.8)Zn_(0.2)S under the same conditions.

关 键 词：Ti_(3)C_(2)T_(x)纳米片 Cd_(0.8)Zn_(0.2)S 异质结 助催化剂 光催化制氢 

分 类 号：O643.36[理学—物理化学] TQ116.2[理学—化学]