1
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Wang M, Sun W, Li M, Wu X, Chen C, Cai T, Zeng Q, Hua Y, Wang L, Xie H. π-electron injection activated dormant ligands in graphitic carbon nitride for efficient and stable uranium extraction. JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135445. [PMID: 39116743 DOI: 10.1016/j.jhazmat.2024.135445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 08/04/2024] [Accepted: 08/05/2024] [Indexed: 08/10/2024]
Abstract
Graphitic carbon nitride (CN) as an adsorbent exhibit promising potential for the removal of uranium in water. However, the lack of active sites seriously restricts its practical application. In contrast to the traditional method of introducing new ligands, we propose a strategy to activate original ligands on CN by injecting π electrons, which can be realized by grafting 4-phenoxyphenol (PP) on CN (PCN). Compared with CN, the maximum adsorption capacity of PCN for uranium increased from 150.9 mg/g to 380.6 mg/g. Furthermore, PCN maintains good adsorption properties over a wide range of uranium concentrations (1 ∼ 60 mg/L) and pH (4 ∼ 8). After 5 consecutive cycles, PCN exhibited sustained uranium removal performance with a little of losses. The experimental and theoretical results show that the enhancement of adsorption performance is mainly due to the ligands activation of CN by delocalization of π electrons from PP. Furthermore, this activation can be enhanced by irradiation, as the CN can be photoexcited to provide additional photoelectrons for PP. As a result, dormant ligands such as N-CN, C-O-C, C-N-H and N-(C)3 can be activated to participate in coordination with uranium. This work provides theoretical guidance for the design and preparation of high efficiency uranium adsorbent.
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Affiliation(s)
- Minjie Wang
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Wenxiu Sun
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Mi Li
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Xiaoyan Wu
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Chaomeng Chen
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China; Boke Environmental Engineering Co., Ltd. of Hunan Province, Hengyang, Hunan 421001, PR China
| | - Tao Cai
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China.
| | - Qingyi Zeng
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China.
| | - Yilong Hua
- School of Resources Environment and Safety Engineering, University of South China, Hengyang, Hunan 421001, PR China
| | - Longlu Wang
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications (NJUPT), Wenyuan Road, Nanjing 210023, PR China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Y2, 2nd Floor, Building 2, Xixi Legu Creative Pioneering Park, No. 712 Wen'er West Road, Xihu District, Hangzhou City, Zhejiang Province 310003, PR China
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2
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Tian Y, Xu L, Ning S, Wang C, Wang Y, Jiang H, Yuan D, Yu F, Liu Y. Ti 3C 2T x/Cd 0.8Zn 0.2S composites constructed of Schottky heterojunction for efficient photocatalytic reduction of U(VI). J Colloid Interface Sci 2024; 677:470-480. [PMID: 39098280 DOI: 10.1016/j.jcis.2024.07.238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/27/2024] [Accepted: 07/30/2024] [Indexed: 08/06/2024]
Abstract
Photocatalysis has emerged as a extremely promising green technology for the treatment of uranium-containing wastewater. This study focuses on the fabrication of Ti3C2Tx/Cd0.8Zn0.2S composites with Schottky junctions through the in-situ growth of Cd0.8Zn0.2S on Ti3C2Tx nanosheets, enabling efficient photoreduction of U(VI) without the requirement of sacrificial agents. The results demonstrate that the Ti3C2Tx/Cd0.8Zn0.2S composites achieve remarkable 99.48 % U(VI) reduction efficiency within 60 min in a 100 ppm uranium solution. Furthermore, the removal rate remains above 90 % after five cycles. The formation of Schottky heterojunctions by Ti3C2Tx and Cd0.8Zn0.2S leads to the generation of an internal electric field that significantly promotes the rapid separation and transfer of photogenerated carriers, thereby enhancing the photocatalytic reduction efficiency of Ti3C2Tx/Cd0.8Zn0.2S-3:100 (TC/CZS-3:100). A considerable amount of electrons accumulate on Ti3C2Tx via the Schottky barrier, effectively facilitating the reduction of U(VI) to U(IV). As a co-catalyst, Ti3C2Tx enhances the photocatalytic performance and stability of Cd0.8Zn0.2S. Moreover, the practical application in the waste liquid of rare earth tailings reveals that the removal rate can be as high as 91.24 %. This research is of significant value in the development of effective photocatalysts for the elimination of uranium from wastewater.
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Affiliation(s)
- Yun Tian
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Luowen Xu
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Shuo Ning
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Changfu Wang
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Yun Wang
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Hao Jiang
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Dingzhong Yuan
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Fengtao Yu
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Yan Liu
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China.
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Li P, He T, Wang J, Ou N, Liang J, Wang G, Fan Q. Realizing Direct Uranium Extraction from Seawater Using a Carboxyl-g-C 3N 4/CdS Hydrogel. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404417. [PMID: 39039986 DOI: 10.1002/smll.202404417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/11/2024] [Indexed: 07/24/2024]
Abstract
The photocatalytic U(VI) reduction is regarded as an effective strategy for recovering uranium. However, its application in seawater uranium extraction poses challenges due to limited reactivity in the presence of carbonate and under atmospheric conditions. In the present study, a photoactive hydrogel made of carboxyl-functionalized g-C3N4/CdS (CCN/CdS) is designed for extracting uranium. The carboxyl groups on g-C3N4 enhance the affinity toward uranyl ions while CdS facilitates the activation of dissolved oxygen. Under atmospheric conditions, the prepared hydrogel catalyst achieves over 80% reduction rate of 0.1 mM U(VI) within 150 min in the presence of carbonate, without the assistance of any electron donors. During the photocatalytic process, U(VI) is reduced to form UO2+x. The hydrogel catalyst exhibits a high uranium extraction capacity of >434.5 mg g⁻1 and the products can be effectively eluted using a 0.1 M NaCO3 solution. Furthermore, this hydrogel catalyst offers excellent stability, good recyclability, outstanding antifouling activity, and ease of separation, all of which are desirable for seawater uranium extraction. Finally, the test in real seawater demonstrates the successful extraction of uranium from seawater using the prepared hydrogel catalyst.
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Affiliation(s)
- Ping Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
- Key Laboratory of Petroleum Resources Exploration and Evaluation, Lanzhou, Gansu, 730000, China
- Changyi Marine Ecology and Engineering Research Station, Changyi, 261300, China
- Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou, 730000, China
| | - Teng He
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Jingjing Wang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Niya Ou
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Jianjun Liang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
- Key Laboratory of Petroleum Resources Exploration and Evaluation, Lanzhou, Gansu, 730000, China
- Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou, 730000, China
| | - Gen Wang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
- Key Laboratory of Petroleum Resources Exploration and Evaluation, Lanzhou, Gansu, 730000, China
| | - Qiaohui Fan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
- Key Laboratory of Petroleum Resources Exploration and Evaluation, Lanzhou, Gansu, 730000, China
- Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou, 730000, China
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4
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Hu E, Liu Q, Qian Z, Zhong Q, He J, Xu S, Lu T, Li J, Chen T, Zhu W. Unveiling Mechanistic Insight into Accelerating Oxygen Molecule Activation by Oxygen Defects in Co 3O 4-x/g-C 3N 4 p-n Heterojunction for Efficient Photo-Assisted Uranium Extraction from Seawater. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403105. [PMID: 38973107 DOI: 10.1002/smll.202403105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/12/2024] [Indexed: 07/09/2024]
Abstract
Photo-assisted uranium extraction from seawater (UES) is regarded as an efficient technique for uranium resource recovery, yet it currently faces many challenges, such as issues like biofouling resistance, low charge separation efficiency, slow carrier transfer, and a lack of active sites. Based on addressing the above challenges, a novel oxygen-deficient Co3O4-x/g-C3N4 p-n heterojunction is developed for efficient photo-assisted uranium extraction from seawater. Relying on the defect-coupling heterojunction synergistic effect, the redistribution of molecular charge density formed the built-in electric field as revealed by DFT calculations, significantly enhancing the separation efficiency of carriers and accelerating their migration rate. Notably, oxygen vacancies served as capture sites for oxygen, effectively promoting the generation of reactive oxygen species (ROS), thereby significantly improving the photo-assisted uranium extraction performance and antibacterial activity. Thus, under simulated sunlight irradiation with no sacrificial reagent added, Co3O4-x/g-C3N4 extracted a high uranium extraction amount of 1.08 mg g-1 from 25 L of natural seawater after 7 days, which is superior to most reported carbon nitride-based photocatalysts. This study elaborates on the important role of surface defects and inerface engineering strategies in enhancing photocatalytic performance, providing a new approach to the development and design of uranium extraction material from seawater.
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Affiliation(s)
- Enmin Hu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Qian Liu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Zishu Qian
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Qian Zhong
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Junhui He
- Department of Materials Engineering, Sichuan College of Architectural Technology, Deyang, Sichuan, 618000, P. R. China
| | - Shicheng Xu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Tianming Lu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Jin Li
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Tao Chen
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Wenkun Zhu
- State Key Laboratory of Environment-friendly Energy Materials, National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety, School of National Defense & Nuclear Science and Technology, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
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5
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Yang Y, Guo K, Zhu M, Zhang A, Xing M, Lu Y, Bai X, Ji X, Hu Y, Liu S. Exploring Electron Transfer Mechanism in Synergistic Interactional Reduced Polyoxometalate-Based Cu(I)-Organic Framework for Photocatalytic Removal of U(VI). Inorg Chem 2024; 63:7876-7885. [PMID: 38608259 DOI: 10.1021/acs.inorgchem.4c00597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2024]
Abstract
Photocatalytic reduction of U(VI) is a promising method for removing uranium containing pollutants. However, using polyoxometalate-based metal-organic frameworks (POMOFs) for photoreduction of U(VI) is rare, and the relevant charge transfer pathway is also not yet clear. In this article, we demonstrate a highly efficient strategy and revealed a clearly electron transfer pathway for the photoreduction of U(VI) with 99% removal efficiency by using a novel POMOF, [Cu(4,4'-bipy)]5·{AsMo4VMo6VIV2VO40(VIVO)[VIVO(H2O)]}·2H2O (1), as catalyst. The POMOF catalyst was constructed by the connection of reduced {AsMo10V4} clusters and Cu(I)-MOF chains through Cu-O coordination bonds, which exhibits a broader and stronger light absorption capacity due to the presence of reduced {AsMo10V4} clusters. Significantly, the transition of electrons from Cu(I)-MOF to {AsMo10V4} clusters (Cu → Mo/V) greatly inhibits the recombination of photogenerated carriers, thereby advancing electron transfer. More importantly, the {AsMo10V4} clusters are not only adsorption sites but also catalytically active sites. This causes the fast transfer of photogenerated electrons from Mo/V to UO22+(Mo/V → O → U) via the surface oxygen atoms. The shorter electron transmission distance between catalytic active sites and UO22+ achieves faster and more effective electron transport. All in all, the highly effective photocatalytic removal of U(VI) using the POMOF as a catalyst is predominantly due to the synergistic interaction between Cu(I)-MOFs and reduced {AsMo10V4} clusters.
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Affiliation(s)
- Yanli Yang
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Keke Guo
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, Jilin 130012, P. R. China
| | - Maochun Zhu
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Ange Zhang
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Min Xing
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Ying Lu
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Xue Bai
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Xiaoying Ji
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Yingjie Hu
- Nanjing Key Laboratory of Advanced Functional Materials, Nanjing Xiaozhuang University, Nanjing, Jiangsu 211171, P. R. China
| | - Shuxia Liu
- Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
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6
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Wu Z, Xie Z, Zhu Y, Wang B, Nie Y, Qiu J, Le Z. Solvent-regulated self-assembled carbon nitride for photocatalytic reduction of U(VI) in water. Photochem Photobiol Sci 2024; 23:651-664. [PMID: 38430372 DOI: 10.1007/s43630-024-00541-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 01/18/2024] [Indexed: 03/03/2024]
Abstract
Manufacturing high-performance and reusable materials from radioactive uranium-containing wastewater remains a significant challenge. Herein, a supramolecular self-assembly strategy was proposed, using melamine and cyanuric acid as precursors and using intermolecular hydrogen bond force to form carbon nitride (CN-D) in different solvents through a single thermal polymerization strategy. Supramolecular self-assembly method is a promising strategy to synthesize a novel carbon nitride with molecular regulatory properties. In addition, 98% of U(VI) in wastewater can be removed by using CN-D for 60 min under visible light. After five cycles of recycling, more than 95% of U(VI) can still be reduced, indicating that it has good recyclability and reusability. This study not only provides an efficient photocatalytic method of uranium reduction, but also provides a new method for self-assembly synthesis.
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Affiliation(s)
- Zhiwen Wu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China
| | - Zongbo Xie
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China.
| | - Ye'an Zhu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China
| | - Bo Wang
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China
| | - Yidan Nie
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China
| | - Jialin Qiu
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China
| | - Zhanggao Le
- Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang, 330013, China.
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, China.
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7
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Zhang L, Luo YT, Xiao SJ, Fan JQ, Tan QG, Sun C, Song AM, Liang RP, Qiu JD. The construction of a stable hydrogen-bonded organic framework for the photocatalytic reduction and removal of uranium. Chem Commun (Camb) 2024; 60:3583-3586. [PMID: 38470082 DOI: 10.1039/d4cc00438h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
An imidazolyl hydrogen-bonded organic framework (HOF-T) with outstanding thermal and water stability was constructed by C-H⋯N hydrogen bonding and C-H⋯π interactions. UO22+ can be selectively captured by the imidazole group of HOF-T and rapidly reduced to UO2 under visible light irradiation, realizing exceptional uranium removal with high capacity and fast kinetics.
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Affiliation(s)
- Li Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Yu-Ting Luo
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Sai-Jin Xiao
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
| | - Jia-Qi Fan
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Quan-Gen Tan
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Chen Sun
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - An-Min Song
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Ru-Ping Liang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Jian-Ding Qiu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
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8
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Zhu H, Zhao J, Duan L, Zhao G, Yu Z, Li J, Sun H, Meng Q. Low-Temperature Synthesis of Cyano-Rich Modified Surface-Alkalinized Heterojunctions with Directional Charge Transfer for Photocatalytic In Situ Generation and Consumption of Peroxides. ACS APPLIED MATERIALS & INTERFACES 2024; 16:6008-6024. [PMID: 38282284 DOI: 10.1021/acsami.3c18293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
The synthesis of low-temperature poly(heptazine imide) (PHI) presents a significant challenge. In this context, we have developed a novel low-temperature synthesis strategy for PHI in this work. This strategy involves the introduction of Na+ ions, which etch and disrupt the conjugated structure of carbon nitride (CN) during assisted thermal condensation. This disruption leads to the partial decomposition of the heptazine ring structure, resulting in the formation of C≡N functionalities on the CN surface, which are enriched with hydroxyl groups and undergo cyano modification. The formation of heterojunctions between CN and ZnO, which facilitate charge transfer along an immobilization pathway, accelerated charge transfer processes and improved reactant adsorption as well as electron utilization efficiency. The resulting catalyst was employed for the room temperature, atmospheric pressure, and solvent-free photocatalytic selective oxidation of cumene (CM), achieving a cumene conversion rate of 28.7% and a remarkable selectivity of 92.0% toward the desired product, cumene hydroperoxide (CHP). Furthermore, this CHP induced oxidative reactions, as demonstrated by the successful oxidation of benzylamine to imine and the oxidation of sulfide to sulfoxide, both yielding high product yields. Additionally, the utilization of a continuous-flow device significantly reduces the reaction time required for these oxidation processes. This work not only introduces an innovative approach to environmentally friendly, sustainable, clean, and efficient PHI synthesis but also underscores the promising potential and advantages of carbon nitride-based photocatalysts in the realm of sustainable and green organic transformations.
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Affiliation(s)
- Hongfei Zhu
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jingnan Zhao
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Liyuan Duan
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Guofeng Zhao
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zongyi Yu
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jianing Li
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Huinan Sun
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Qingwei Meng
- State Key Laboratory of Fine Chemicals and MOE Frontiers Center for Intelligent Materials and Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- Ningbo Institute of Dalian University of Technology, Ningbo 315016, P. R. China
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9
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Guo L, Tu C, Huang Y, Yang Y, Zhang QY, Yu Z, Luo F. Strong Electron Transfer in Covalently Integrating Cu(I)-Organic Frameworks Enabling Effective Radionuclide Capture. Inorg Chem 2024; 63:1127-1135. [PMID: 38165159 DOI: 10.1021/acs.inorgchem.3c03483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Rational construction of strong electron-transfer materials remains a challenging task. Herein, we show a design rule for the construction of strong electron-transfer materials through covalently integrating electron-donoring Cu(I) clusters and electron-withdrawing triazine monomers together. As expected, Cu-CTF-1 (Cu(I)-triazine framework) was found to enable strong electron transfer up to 0.46|e| from each Cu(I) metal center to each adjacent triazine fragment. This finally leads to good spatial separation in both photogenerated electron-hole pairs and function units for photocatalytic uranium reduction under ambience and no sacrificial agent and to good charge separation of [I+][I5-] for I2 immobilization under extremely rigorous conditions. The results have not only opened up a structural design principle to access electron-transfer materials but also solved several challenging tasks in the field of radionuclide capture and CTFs.
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Affiliation(s)
- Liecheng Guo
- School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Changzheng Tu
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China
| | - Yiwei Huang
- School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Yuting Yang
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China
| | - Qing Yun Zhang
- School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, China
| | - Zhiwu Yu
- High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, Anhui, China
| | - Feng Luo
- School of Chemistry and Materials Science, East China University of Technology, Nanchang 330013, China
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10
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Deng Q, Li H, Hu W, Hou W. Stability and Crystallinity of Sodium Poly(Heptazine Imide) in Photocatalysis. Angew Chem Int Ed Engl 2023; 62:e202314213. [PMID: 37794843 DOI: 10.1002/anie.202314213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/04/2023] [Accepted: 10/05/2023] [Indexed: 10/06/2023]
Abstract
Poly(heptazine imide) (PHI) salts, as crystalline carbon nitrides, exhibit high photocatalytic activity and are being extensively researched, but its photochemical instability has not drawn researchers' attention yet. Herein, sodium PHI (PHI-Na) ultrathin nanosheets with increased crystallinity, synthesized by enhancing contact of melamine with NaCl functioning as a structure-induction agent and hard template, exhibits improved photocatalytic hydrogen evolution activity, but low photochemical stability, owing to Na+ loss in the photocatalytic process, which, interestingly, can be enhanced by the common ion effect, e.g., addition of NaCl that is also able to remarkably increase the photoactivity with the apparent quantum yield at 420 nm reaching 41.5 %. This work aims at attracting research peers' attention to photochemical instability of PHI salts and provides a way to enhance their crystallinity.
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Affiliation(s)
- Quanhua Deng
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
- Stanley fertilizer (plain) Co., Ltd, Dezhou, Shandong, 250100, China
| | - Haiping Li
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Wenxuan Hu
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
| | - Wanguo Hou
- National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China
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Chen X, Du S, Gao L, Shao K, Li Z, Liu B. A hydrangea-like nitrogen-doped ZnO/BiOI nanocomposite for photocatalytic degradation of tetracycline hydrochloride. NANOSCALE ADVANCES 2023; 5:1936-1942. [PMID: 36998661 PMCID: PMC10044580 DOI: 10.1039/d2na00896c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/14/2023] [Indexed: 06/19/2023]
Abstract
The effectiveness of photocatalysts can be impacted by the high compounding efficiency of photogenerated carriers, which depends on the morphology of the photocatalyst. Here, a hydrangea-like N-ZnO/BiOI composite has been prepared for achieving efficient photocatalytic degradation of tetracycline hydrochloride (TCH) under visible light. The N-ZnO/BiOI exhibits a high photocatalytic performance, degrading nearly 90% of TCH within 160 min. After 3 cycling runs, the photodegradation efficiency remained above 80%, demonstrating its good recyclability and stability. The major active species at work are superoxide radicals (·O2 -) and photo-induced holes (h+) in the photocatalytic degradation of TCH. This work provides not only a new idea for the design of photodegradable materials but also a new method for the effective degradation of organic pollutants.
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Affiliation(s)
- Xiujuan Chen
- School of Stomatology, Lanzhou University Lanzhou 730000 China
| | - Shaobo Du
- College of Life Science and Technology, Gansu Agricultural University Lanzhou 730070 China
| | - Lei Gao
- School of Stomatology, Lanzhou University Lanzhou 730000 China
| | - Kejin Shao
- School of Nuclear Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Zhan Li
- School of Nuclear Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Bin Liu
- School of Stomatology, Lanzhou University Lanzhou 730000 China
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