{"title":"Advances in electrocatalytic urea synthesis: From fundamentals to applications","authors":"Zhenlin Mo, Jincheng Mu, Baojun Liu","doi":"10.1016/j.apmate.2024.100245","DOIUrl":"10.1016/j.apmate.2024.100245","url":null,"abstract":"<div><div>The electrocatalytic synthesis of urea (ESU) is a green and sustainable alternative to conventional production methods, and the related research is still in its infancy. Up to now, the field has been explored by several reviews, however, the authors are focusing on some particular problems and could not provide a holistic view of the ESU. Based on these considerations, the novelty of this review lies in its comprehensive and systematic framework, as well as its in-depth analysis and general summary of several key issues. Hence, in this review, we critically evaluated the ESU through in-depth studies of various aspects, including nitrogen sources, catalysts choice, conditions modifications, detection methods, product calculations, and mechanisms evaluation, etc. In addition, after analyzing the reaction routes, reaction kinetics/thermodynamics and techno-economics assessment are also investigated. Finally, the summary and outlook are presented eventually, providing valuable insights for the related research. We believe that we will provide researchers with a comprehensive and clear picture of green synthesized urea, which is of great academic and practical significance.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100245"},"PeriodicalIF":0.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Heteroatom doping in 2D MXenes for energy storage/conversion applications","authors":"Sumanta Sahoo , Rajesh Kumar , Iftikhar Hussain , Kaili Zhang","doi":"10.1016/j.apmate.2024.100246","DOIUrl":"10.1016/j.apmate.2024.100246","url":null,"abstract":"<div><div>MXenes (inorganic metal carbides, nitrides, and carbonitrides) are currently the rising star of two-dimensional (2D) family. After its discovery in 2011, initial research was concentrated on pristine MXenes only. However, in the last few years, the MXene family has been expanded with the exploration of novel double MXenes, synthesis of non-Ti MXenes, and heteroatom doping of MXenes. The current review article delivers an exclusive overview of the current research trends on the heteroatom doping of MXenes. The recent advances in heteroatom doping of MXenes (majorly Ti-MXenes) for energy storage/conversion applications including secondary batteries (Li-ion, Li–S, Na–S, Na-ion, K-ion, Zn-ion batteries), supercapacitors, electrocatalysis, etc. are summarized. A brief overview of the defects as well as doping in various 2D materials is included in the manuscript. Various doping strategies of MXenes are outlined. Moreover, the impact of artificial intelligence/machine learning on MXene research is also concisely discussed. Additionally, the advantages of doping on MXenes are discussed in detail. Lastly, the existing challenges and future prospects of doped MXenes are addressed. It is expected that the current review will open new prospects for the fabrication of advanced energy devices through heteroatom doping of MXenes.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100246"},"PeriodicalIF":0.0,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yao Wang , Meng Zheng , Yunrui Li , Lidan Zhu , Haoran Li , Qishun Wang , Hui Zhao , Jiawei Zhang , Yuming Dong , Yongfa Zhu
{"title":"Atomically dispersed NiOx cluster on high-index Pt facets boost ethanol electrooxidation through long-range synergistic sites","authors":"Yao Wang , Meng Zheng , Yunrui Li , Lidan Zhu , Haoran Li , Qishun Wang , Hui Zhao , Jiawei Zhang , Yuming Dong , Yongfa Zhu","doi":"10.1016/j.apmate.2024.100244","DOIUrl":"10.1016/j.apmate.2024.100244","url":null,"abstract":"<div><div>Constructing the desired long-range dual sites to enhance the C–C bond-cleavage and CO-tolerate ability during ethanol oxidation reaction is of importance for further applications. Herein, the concept of holding atomically dispersed NiO<sub><em>x</em></sub> cluster supported on Pt-based high-index facets (NiO<sub><em>x</em></sub>/Pt) is proposed to build O-bridged Pt–Ni dual sites. Strikingly, the obtained NiO<sub><em>x</em></sub>/Pt dual sites show 4.97 times specific activity higher than that of commercial Pt/C (0.35 mA cm<sup>−2</sup>), as well as outstanding CO-tolerance and durability. The advanced electrochemical in-situ characterizations reveal that the NiO<sub><em>x</em></sub>/Pt can accelerate rapid dehydroxylation and C–C bond-cleavage over the Pt–Ni dual sites. Theoretical calculations disclose that the atomically dispersed NiO<sub><em>x</em></sub> species can lower the adsorption/reaction energy barriers of intermediates. This tactic provides a promising methodology on regulating the surface synergistic sites via engineering atomically dispersed oxide site.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100244"},"PeriodicalIF":0.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Taiyu Huang , Zimo Huang , Xixian Yang , Siyuan Yang , Qiongzhi Gao , Xin Cai , Yingju Liu , Yueping Fang , Shanqing Zhang , Shengsen Zhang
{"title":"Green and regulable synthesis of CdNCN on CdS semiconductor: Atomic-level heterostructures for enhanced photocatalytic hydrogen evolution","authors":"Taiyu Huang , Zimo Huang , Xixian Yang , Siyuan Yang , Qiongzhi Gao , Xin Cai , Yingju Liu , Yueping Fang , Shanqing Zhang , Shengsen Zhang","doi":"10.1016/j.apmate.2024.100242","DOIUrl":"10.1016/j.apmate.2024.100242","url":null,"abstract":"<div><div>In the realm of photoenergy conversion, the scarcity of efficient light-driven semiconductors poses a significant obstacle to the advancement of photocatalysis, highlighting the critical need for researchers to explore novel semiconductor materials. Herein, we present the inaugural synthesis of a novel semiconductor, CdNCN, under mild conditions, while shedding light on its formation mechanism. By effectively harnessing the [NCN]<sup>2</sup><sup>⁻</sup> moiety in the thiourea process, we successfully achieve the one-pot synthesis of CdNCN-CdS heterostructure photocatalysts. Notably, the optimal CdNCN-CdS sample demonstrates a hydrogen evolution rate of 14.7 mmol g<sup>−1</sup> h<sup>−1</sup> under visible light irradiation, establishing itself as the most efficient catalyst among all reported CdS-based composites without any cocatalysts. This outstanding hydrogen evolution performance of CdNCN-CdS primarily arises from two key factors: i) the establishment of an atomic-level N-Cd-S heterostructure at the interface between CdNCN and CdS, which facilitating highly efficient electron transfer; ii) the directed transfer of electrons to the (110) crystal plane of CdNCN, promoting optimal hydrogen adsorption and active participation in the hydrogen evolution reaction. This study provides a new method for synthesizing CdNCN materials and offers insights into the design and preparation of innovative atomic-level composite semiconductor photocatalysts.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100242"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huange Liao , Kai Huang , Weidong Hou , Huazhang Guo , Cheng Lian , Jiye Zhang , Zheng Liu , Liang Wang
{"title":"Atmosphere engineering of metal-free Te/C3N4 p-n heterojunction for nearly 100% photocatalytic converting CO2 to CO","authors":"Huange Liao , Kai Huang , Weidong Hou , Huazhang Guo , Cheng Lian , Jiye Zhang , Zheng Liu , Liang Wang","doi":"10.1016/j.apmate.2024.100243","DOIUrl":"10.1016/j.apmate.2024.100243","url":null,"abstract":"<div><div>Carbon nitride (CN)-based heterojunction photocatalysts hold promise for efficient carbon dioxide (CO<sub>2</sub>) reduction. However, suboptimal production yields and limited selectivity in CO<sub>2</sub> conversion pose significant barriers to achieving efficient CO<sub>2</sub> conversion. Here, we present the construction of a p-n heterojunction between ultrasmall Te NPs and CN nanosheet using a novel tandem hydrothermal-calcination synthesis strategy. Through ammonia-assisted calcination, ultrasmall Te NPs are grown in-situ on the CN nanosheets’ surface, resulting in the generation of a robust p-n heterojunction. The synthesized heterojunction exhibits increased specific surface area, reinforced visible light absorption, intensive CO<sub>2</sub> adsorption capacity, and efficient charge transfer. The optimum Te/CN-NH<sub>3</sub> demonstrates superior photocatalytic CO<sub>2</sub> reduction activity and durability, with nearly 100 % selectivity for CO and a yield as high as 92.0 μmol g<sup>−1</sup> h<sup>−1</sup>, a fourfold increase compared to pure CN. Experimental and theoretical calculations unravel that the strong built-in electric field of the Te/CN-NH<sub>3</sub> p-n heterojunction accelerates the migration of photogenerated electrons from Te NPs to the N site on CN nanosheets, thereby promoting CO<sub>2</sub> reduction. This study provides a promising material design approach for the construction of high-performance p-n heterojunction photocatalysts.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100243"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaofeng Wu , Freddy E. Oropeza , Shixin Chang , Marcus Einert , Qingyang Wu , Clément Maheu , Julia Gallenberger , Chuanmu Tian , Kangle Lv , Jan P. Hofmann
{"title":"Promoting effect of interfacial hole accumulation on photoelectrochemical water oxidation in BiVO4 and Mo-doped BiVO4","authors":"Xiaofeng Wu , Freddy E. Oropeza , Shixin Chang , Marcus Einert , Qingyang Wu , Clément Maheu , Julia Gallenberger , Chuanmu Tian , Kangle Lv , Jan P. Hofmann","doi":"10.1016/j.apmate.2024.100234","DOIUrl":"10.1016/j.apmate.2024.100234","url":null,"abstract":"<div><div>Hole transfer at the semiconductor-electrolyte interface is a key elementary process in (photo)electrochemical (PEC) water oxidation. However, up to now, a detailed understanding of the hole transfer and the influence of surface hole density on PEC water oxidation kinetics is lacking. In this work, we propose a model for the first time in which the surface accumulated hole density in BiVO<sub>4</sub> and Mo-doped BiVO<sub>4</sub> samples during water oxidation can be acquired via employing illumination-dependent Mott-Schottky measurements. Based on this model, some results are demonstrated as below: (1) Although the surface hole density increases when increasing light intensity and applied potential, the hole transfer rate remains linearly proportional to surface hole density on a log-log scale. (2) Both water oxidation on BiVO<sub>4</sub> and Mo-doped BiVO<sub>4</sub> follow first-order reaction kinetics at low surface hole densities, which is in good agreement with literature. (3) We find that water oxidation active sites in both BiVO<sub>4</sub> and Mo-doped BiVO<sub>4</sub> are very likely to be Bi<sup>5+</sup>, which are produced by photoexcited or/and electro-induced surface holes, rather than VO<sub><em>x</em></sub> species or Mo<sup>6+</sup> due to their insufficient redox potential for water oxidation. (4) Introduction of Mo doping brings about higher OER activity of BiVO<sub>4</sub>, as it suppresses the recombination rate of surface holes and increases formation of Bi<sup>5+</sup>. This surface hole model offers a general approach for the quantification of surface hole density in the field of semiconductor photoelectrocatalysis.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100234"},"PeriodicalIF":0.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bushra Bibi , Atif Nazar , Bin Zhu , Fan Yang , Muhammad Yousaf , Rizwan Raza , M.A.K. Yousaf Shah , Jung-Sik Kim , Muhammad Afzal , Yongpeng Lei , Yifu Jing , Peter Lund , Sining Yun
{"title":"Emerging semiconductor ionic materials tailored by mixed ionic-electronic conductors for advanced fuel cells","authors":"Bushra Bibi , Atif Nazar , Bin Zhu , Fan Yang , Muhammad Yousaf , Rizwan Raza , M.A.K. Yousaf Shah , Jung-Sik Kim , Muhammad Afzal , Yongpeng Lei , Yifu Jing , Peter Lund , Sining Yun","doi":"10.1016/j.apmate.2024.100231","DOIUrl":"10.1016/j.apmate.2024.100231","url":null,"abstract":"<div><div>Mixed ionic-electronic conductors (MIECs) play a crucial role in the landscape of energy conversion and storage technologies, with a pronounced focus on electrode materials’ application in solid oxide fuel cells (SOFCs) and proton-conducting ceramic fuel cells (PCFCs). In parallel, the emergence of semiconductor ionic materials (SIMs) has introduced a new paradigm in the field of functional materials, particularly for both electrode and electrolyte development for low-temperature, 300–550 °C, SOFCs, and PCFCs. This review article critically delves into the intricate mechanisms underpinning the synergistic relationship between MIECs and SIMs, with a particular emphasis on elucidating the fundamental working principles of semiconductor ionic membrane fuel cells (SIMFCs). By exploring critical facets such as ion-coupled electron transfer/transport, junction effect, energy bands alignment, and theoretical computations, it casts an illuminating spotlight on the transformative potential of MIECs, also involving triple charge conducting oxides (TCOs) in the context of SIMs and advanced fuel cells (FCs). The insights and findings articulated herein contribute substantially to the advancement of SIMs and SIMFCs by tailoring MIECs (TCOs) as promising avenues toward the emergence of high-performance SIMFCs. This scientific quest not only addresses the insistent challenges surrounding efficient charge transfer, ionic transport and power output but also unlocks the profound potential for the widespread commercialization of FC technology<strong>.</strong></div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100231"},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sahil Thakur , Abhijeet Ojha , Sushil Kumar Kansal , Navneet Kumar Gupta , Hendrik C. Swart , Junghyun Cho , Andrej Kuznetsov , Shuhui Sun , Jai Prakash
{"title":"Advances in powder nano-photocatalysts as pollutant removal and as emerging contaminants in water: Analysis of pros and cons on health and environment","authors":"Sahil Thakur , Abhijeet Ojha , Sushil Kumar Kansal , Navneet Kumar Gupta , Hendrik C. Swart , Junghyun Cho , Andrej Kuznetsov , Shuhui Sun , Jai Prakash","doi":"10.1016/j.apmate.2024.100233","DOIUrl":"10.1016/j.apmate.2024.100233","url":null,"abstract":"<div><div>Photocatalysis is an advanced oxidation process where light exposure triggers a semiconducting nanomaterial (nano-photocatalyst) to generate electron-hole (e<sup>−</sup>/h<sup>+</sup>) pairs and free radicals. This phenomenon is widely used for the photocatalysis-assisted removal of organic and other contaminants using wide range of nano-photocatalysts, offering an efficient approach to environmental remediation. However, the introduction of powdered nano-photocatalysts into water systems often leads to unintended secondary pollution in the form of residual nano-photocatalysts, ion leaching, free radicals, toxic by-products etc. Such practices potentially introduce emerging secondary contaminants into aquatic environments, posing risks to both aquatic life and human health. The resulting chemical by-products and intermediates can effectively induce chronic toxicity, neurological and developmental disorders, cardiovascular defects, and intestinal ailments in humans and aquatic species. Despite having a range of health and environmental consequences, this dark side of nano-photocatalysts has been comparatively less explored and discussed in the literature. In this review, the pros and cons of powder nano-photocatalysts are discussed in view of their advantages as well as disadvantages in wastewater treatment. The discussion encompasses their classification based on composition, dimensions, structure, and activity, as well as recent advancements in improving their photocatalytic efficiency. The article also explores the recent advances on their applications in photocatalytic removal of various water pollutants/contaminants of emerging concern (i.e., organic pollutants, micro/nano plastics, heavy ions, disinfections, etc.) Furthermore, an emphasis on the role of such nano-photocatalysts as emerging (secondary) contaminants in water system, along with a thorough discussion of latest studies related to the health and environmental issues, has been discussed. Additionally, it addresses critical issues in applying powder nano-photocatalysts for wastewater detoxification and explores potential solutions to these challenges followed by future prospects.</div></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 6","pages":"Article 100233"},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xuebao Li , Jiasen Wang , Cheng Han , Kun Zeng , Zhuangzhi Wu , Dezhi Wang
{"title":"Surface engineering of nickel-rich single-crystal layered oxide cathode enables high-capacity and long cycle-life sulfide all-solid-state batteries","authors":"Xuebao Li , Jiasen Wang , Cheng Han , Kun Zeng , Zhuangzhi Wu , Dezhi Wang","doi":"10.1016/j.apmate.2024.100228","DOIUrl":"10.1016/j.apmate.2024.100228","url":null,"abstract":"<div><p>Sulfide all-solid-state lithium batteries (SASSLBs) with a single-crystal nickel-rich layered oxide cathode (LiNi<sub><em>x</em></sub>Co<sub><em>y</em></sub>Mn<sub>1-<em>x</em>-<em>y</em></sub>O<sub>2</sub>, <em>x</em> ≥ 0.8) are highly desirable for advanced power batteries owing to their excellent energy density and safety. Nevertheless, the cathode material's cracking issue and its severe interfacial problem with sulfide solid electrolytes have hindered the further development. This study proposes to employ surface modification engineering to produce B-NCM cathode materials coated with boride nanostructure stabilizer in situ by utilizing NCM encapsulated with residual lithium. This approach enhances the electrochemical performance of SASSLBs by effectively inhibiting electrochemical-mechanical degradation of the NCM cathode material on cycling and reducing deleterious side reactions with the solid sulfide electrolyte. The B-NCM/LPSCl/Gr SASSLBs demonstrate impressive cycling stability, retaining 84.19 % of its capacity after 500 cycles at 0.2 C, which represents a 30.13 % increase vs. NCM/LPSCl/Gr. It also exhibits a specific capacity of 170.4 mAh/g during its first discharge at 0.1 C. This work demonstrates an effective surface engineering strategy for enhancing capacity and cycle life, providing valuable insights into solving interfacial problems in SASSLBs.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 5","pages":"Article 100228"},"PeriodicalIF":0.0,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772834X24000599/pdfft?md5=d3b60979e51850a599f1440f00d030e5&pid=1-s2.0-S2772834X24000599-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142048835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lexing Liang , Xiuling Wang , Cong Zhang , Kailei Lu , Guangfan Tan , Yanhao Dong , Yanli Shi , Jianqi Qi , Tiecheng Lu
{"title":"New lead-free chemistry for in-situ monitoring of advanced nuclear power plant","authors":"Lexing Liang , Xiuling Wang , Cong Zhang , Kailei Lu , Guangfan Tan , Yanhao Dong , Yanli Shi , Jianqi Qi , Tiecheng Lu","doi":"10.1016/j.apmate.2024.100229","DOIUrl":"10.1016/j.apmate.2024.100229","url":null,"abstract":"<div><p>Nuclear power is essential for sustainable energy infrastructure and economic development, necessitating materials for high-radiation environments that can facilitate visualization and observation. Conventional lead glass is inadequate for future requirements due to radiation-induced darkening, poor mechanical properties, and toxicity. Therefore, there is urgent to find new window materials that offer multi-ionization shielding (particularly against deep-penetrating gamma ray, γ, and neutron, n, radiations), desirable opto-mechanical properties, service stability against darkening, and non-toxicity. In this study, we report a family of transparent rare-earth pyrochlore ceramics La<sub><em>x</em></sub>Gd<sub>2−<em>x</em></sub>Zr<sub>2</sub>O<sub>7</sub>, offering unique chemo-physical properties that are ideal for robust radiation shielding windows. Remarkably, we demonstrated the capability of maintaining high transparency under heavy-dose exposure to 1000 kGy <sup>60</sup>Co γ radiation. We observed the service stability against radiation darkening can be greatly enhanced with La-rich compositions, while Gd-rich compositions undergo shallow darkening that can be reversibly recovered under visible light. This behavior is attributed to mitigated oxygen migration from 48f to 8a in La-rich compositions, which have high pyrochlore phase stability and well-ordered atomic structures, and reversible oxygen migration between 48f and 8a in Gd-rich compositions, which remain active at room temperature. Our proposal and demonstration unlock ample opportunities in designing functional transparent ceramics as window materials for demanding applications in high-radiation environments.</p></div>","PeriodicalId":7283,"journal":{"name":"Advanced Powder Materials","volume":"3 5","pages":"Article 100229"},"PeriodicalIF":0.0,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772834X24000605/pdfft?md5=c08c3029d74ec16a4160991e2c6aa307&pid=1-s2.0-S2772834X24000605-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}