Enhancing photo electrocatalytic water splitting efficiency using Bi2O2CO3@Ni(OH)2 composite with flower-like morphology

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-02-01 DOI:10.1016/j.ceramint.2024.11.415

N. Ch Ramgopal , Nipa Roy , Adel El-marghany , Salh Alhammadi , Gedi Sreedevi , Sai Kumar Arla , Dhananjaya Merum , Sang Woo Joo

{"title":"Enhancing photo electrocatalytic water splitting efficiency using Bi2O2CO3@Ni(OH)2 composite with flower-like morphology","authors":"N. Ch Ramgopal , Nipa Roy , Adel El-marghany , Salh Alhammadi , Gedi Sreedevi , Sai Kumar Arla , Dhananjaya Merum , Sang Woo Joo","doi":"10.1016/j.ceramint.2024.11.415","DOIUrl":null,"url":null,"abstract":"<div><div>The rational design of semiconductor heterojunctions is pivotal in enhancing photoelectrochemical (PEC) water-splitting performance. In this study, we synthesized Bi2O2CO3 (BOC) nanosheets, Ni(OH)2 (NH) nanosheets, and their composite Bi2O2CO3@Ni(OH)2 (BOC-NH) separately using a hydrothermal process. The BOC-NH composite displays a distinct 3D flower-like structure with cross-linked petals of 21.82 nm, substantially enhancing the surface area and facilitating effective heterojunction formation between BOC and NH. This synergistic effect enhances charge separation and transport, leading to superior PEC water oxidation performance. The BOC-NH photoanode achieved a remarkable photocurrent density of 5.87 mA/cm2, 4.48 times higher than pure BOC and 1.75 times that of NH, along with a reduced onset potential of 0.464 V. Transient photocurrent measurements demonstrated excellent stability, while electrochemical impedance spectroscopy (EIS) revealed a significantly lower solution resistance (11.06 Ω), and charge transfer resistance (5.27 Ω) compared to the individual BOC and NH photoanodes. The applied bias photon-to-current efficiency (ABPE) of BOC, NH, and BOC-NH was 0.21 %, 0.36 %, and 0.58 %, respectively, with the composite showing the highest efficiency under light illumination. Long-term stability tests over 7200 s showed sustained photoactivity, with the photocurrent density rising from 0.26 to 0.53 mA/cm2, highlighting the durability of the composite. This work presents a robust strategy for improving PEC water splitting through heterojunction engineering and morphological optimization.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 4","pages":"Pages 4388-4399"},"PeriodicalIF":5.1000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884224055147","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

The rational design of semiconductor heterojunctions is pivotal in enhancing photoelectrochemical (PEC) water-splitting performance. In this study, we synthesized Bi₂O₂CO₃ (BOC) nanosheets, Ni(OH)₂ (NH) nanosheets, and their composite Bi₂O₂CO₃@Ni(OH)₂ (BOC-NH) separately using a hydrothermal process. The BOC-NH composite displays a distinct 3D flower-like structure with cross-linked petals of 21.82 nm, substantially enhancing the surface area and facilitating effective heterojunction formation between BOC and NH. This synergistic effect enhances charge separation and transport, leading to superior PEC water oxidation performance. The BOC-NH photoanode achieved a remarkable photocurrent density of 5.87 mA/cm², 4.48 times higher than pure BOC and 1.75 times that of NH, along with a reduced onset potential of 0.464 V. Transient photocurrent measurements demonstrated excellent stability, while electrochemical impedance spectroscopy (EIS) revealed a significantly lower solution resistance (11.06 Ω), and charge transfer resistance (5.27 Ω) compared to the individual BOC and NH photoanodes. The applied bias photon-to-current efficiency (ABPE) of BOC, NH, and BOC-NH was 0.21 %, 0.36 %, and 0.58 %, respectively, with the composite showing the highest efficiency under light illumination. Long-term stability tests over 7200 s showed sustained photoactivity, with the photocurrent density rising from 0.26 to 0.53 mA/cm², highlighting the durability of the composite. This work presents a robust strategy for improving PEC water splitting through heterojunction engineering and morphological optimization.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.