金属钛酸盐基压电催化剂的最新进展:改善压电性能和调节载流子输运以提高催化性能  

Recent advances in metal titanate-based piezocatalysts:Enhancing catalytic performance through improved piezoelectric properties and regulated carrier transport

作　　者：王凯琪 何益明[1] Kaiqi Wang;Yiming He(School of Physics and Electronic Information Engineering,Zhejiang Normal University,Jinhua 321004,Zhejiang,China)

机构地区：[1]浙江师范大学物理与电子信息工程学院,浙江金华321004

出　　处：《Chinese Journal of Catalysis》2024年第6期111-134,共24页催化学报（英文）

基　　金：国家自然科学基金(22172144).

摘　　要：压电催化技术是一种新兴的催化方法,能够有效地将清洁、丰富的机械能(如水流动能、潮汐能和风能)转化为化学能,在化学催化领域展现出显著潜力,为环境修复和能源管理提供可持续的解决方案.金属钛酸盐因其良好的压电响应、环保特性和成本效益,在压电催化领域备受关注.然而,压电催化活性的不足限制了其实际应用.为克服这一挑战,提高机械能响应效率和减少能量转换过程中的损失成为关键.研究人员通常从两个核心策略出发:一是优化压电性能,二是调控载流子传输.深入理解这些策略在提高压电催化活性中的核心作用,对于设计高效压电催化剂并推动压电催化技术发展具有重要意义.本文系统地总结了金属钛酸盐的分类、合成方法和设计策略.首先,根据其在压电催化中的应用,将金属钛酸盐分为单金属钙钛矿钛酸盐、多金属钙钛矿钛酸盐和层状类钙钛矿钛酸盐,并从结构角度揭示了其压电特性的起源.其次,概述了金属钛酸盐的主要制备方法,包括水热法、固态反应法、熔盐法和静电纺丝法,并从提升催化性能角度比较了它们的优缺点.在金属钛酸盐的设计策略部分,探讨了构建准同型相界、应变工程、居里点控制、外场诱导极化和定向晶体生长等方法对改善压电性能的可行性.特别是,构建准同型相界和采用外场诱导极化,可以分别降低极化旋转的能垒和诱导宏观极化,在提升金属钛酸盐压电催化性能方面表现出显著效果.此外,还强调了助催化剂负载、碳材修饰和半导体异质结构在促进载流子分离中的重要作用.其中,空间分离的助剂修饰能够较大程度地提高载流子的分离效率,进而显著增强压电催化性能.最后,本文对基于金属钛酸盐的压电催化剂的技术发展进行了展望,旨在推动压电催化剂的合理设计和实际应用.具体建议包括:(1)规范压电催化性能Piezocatalysis,as an emerging technology,holds the promise for providing sustainable solutions to environmental remediation and energy management through mechanical energy utilization.Metal titanates(MTs)are well-known for their outstanding piezoelectric response,positioning them as the primary candidates for catalysts in this field.Moreover,their eco-friendly and cost-effective attributes have made them the focus of considerable attention among researchers.However,the insufficient piezocatalytic activity continues to constrain the practical application of MTs.Confronted with suboptimal energy conversion efficiency,enhancing the response to mechanical energy and reducing the subsequent conversion losses are pivotal for improving the piezocatalytic performance.This review commences with the classification and introduction of various MTs relevant to the field of piezocatalysis.Subsequently,the main methods for preparing MTs are presented.Particularly,the design strategies of MTs with excellent piezocatalytic properties are discussed from the perspectives of improving piezoelectric properties and regulating carrier transport,including construction of morphotropic phase boundary,strain engineering,Curie point control,external field-induced polarization,oriented crystal growth,co-catalyst loading,carbon modification,and semiconductor heterostructure construction.Finally,comprehensive challenges to the development of piezocatalytic technology are presented to promote the rational design and practical application of piezocatalysts.

关 键 词：压电催化 金属钛酸盐 增强策略 压电响应 载流子传输 

分 类 号：TQ426[化学工程]