JOURNAL OF MATERIALS SCIENCE
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2023
·Vol. 58
·期 8
·3551-3567
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IF 4.5
Yang Xia,Wei Songrui,Ma Xilong,Gao Zhuwei,Huang Wei,Wang Dun,Liu Zhongxin,Wang Jieqiong
The photothermal process exhibits the largest energy conversion efficiency among all solar energy utilization processes. In this study, a core–shell CoTiO 3 @MnO 2 (CTM) composite photothermal catalyst was synthesized by supporting MnO 2 on CoTiO 3 by hydrothermal synthesis. Binding to peroxymonosulfate (PMS) heterogeneous catalyst removed tetracycline in wastewater. The new catalyst was characterized by FT-IR, UV–Vis, XRD, BET, SEM, TEM, and so on. Kinetic analysis showed that CTM activated PMS at a rate of 3.2 and 3.5 times higher than that of pure light and heat conditions, with complete degradation of tetracycline (TC). Since the outer MnO 2 layer converted the absorbed solar energy into thermal energy, PMS was activated to generate active species while performing electron transfer, which resulted in a considerably improved catalytic efficiency. To prove the wide applicability of the catalyst, other pollutants were degraded, including bisphenol A (BPA), metronidazole (MNZ), and methyl orange (MO). The three pollutants were degraded within 40 min. Finally, our findings demonstrated the mechanism of the photothermal degradation process and provided a novel approach for environmental remediation using renewable solar energy.
Graphical Abstract In this paper, the degradation efficiency of CoTiO 3 was improved by loading MnO 2 on CoTiO 3 . Binding to peroxymonosulfate (PMS) heterogeneous catalyst activation for the catalytic degradation of tetracycline. It was found by experiments that the core-shell structure of the composite material CoTiO 3 @MnO 2 had better photothermal catalysis efficiency than photocatalysis and thermal catalysis.
研究领域:
环境科学
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材料科学
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化学工程
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2016
·
IF 7.145
RongQin Ye,HuaBin Fang,Yan-Zhen Zheng,Nan Li,Yuan Wang,Xia Tao
A novel direct Z-scheme CoTiO3/g-C3N4 (CT-U) photocatalytic system with different weight percentage of CoTiO3 was synthesized using a facile in situ growth method for H2 evolution from water splitting. The as-prepared CT-U composites composed of 1D CoTiO3 microrod and 2D g-C3N4 nanosheet were characterized by various techniques including XRD, SEM, TEM, XPS, FTIR, and UV–vis. Results demonstrate that the CT-U composite photocatalysts were successfully fabricated, with intimate interfacial contact and heterojunction interaction between g-C3N4 and CoTiO3 which can significantly boost the photocatalytic activity compared with prinstine g-C3N4 and CoTiO3. The most enhanced H2-evolution rate of 858 μmol h–1 g–1 and high quantum efficiency (38.4% at 365 nm, 3.23% at 420 ± 20 nm) are achieved at an optimal 0.15% CT-U. Meanwhile, the 0.15% CT-U sample exhibits good photocatalytic stability in recycling H2 evolution. Accordingly, direct Z-scheme mechanism capable of leading efficient charge carrier separation and strong reduction ability for enhanced H2 production was proposed, and further evidenced by PL, photoelectrochemical analysis, and ESR assay.
研究领域:
材料科学
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光催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Lingkun Yang,Zongjun Li,Xin Wang,Lingling Li,Zhe Chen
Photocatalysts featuring S-scheme heterojunctions offer considerable potential for both the photocatalytic CO 2 conversion and the degradation of antibiotics, providing practical solutions for energy crises and environmental challenges. In this work, 1D/2D CoTiO 3 /g-C 3 N 4 (CTO/CN) S-scheme heterojunction is synthesized through electrospinning and calcination . The close interweaving of g-C 3 N 4 nanosheets around CoTiO 3 nanofibers creates ample contact areas and active sites, resulting in exceptional photocatalytic CO production capability. The optimal mass ratio of CoTiO 3 to g-C 3 N 4 is 2%, and the CO and CH 4 yields are 46.5 and 0.825 μmol g -1 h -1 . Moreover, comparing with monomeric g-C 3 N 4 , this composite achieves a better CO yield with 43.5 times and displays an impressive product selectivity of 98.3% for CO 2 -CO photoreduction . In addition, the 2% CTO/CN photocatalyst demonstrates outstanding photocatalytic degradation efficiency, with degradation rates of 95.88%, 95.53%, and 71.23% for tetracycline hydrochloride , oxytetracycline , and ofloxacin , respectively. These enhanced photocatalytic properties are attributed to the S-scheme system constructed by CoTiO 3 with g-C 3 N 4 , maintaining strong oxidation-reduction capabilities while efficiently segregating photogenerated charges, with the existence of S-scheme heterojunction confirmed through various analyses. Furthermore, in situ studies and 13 C calibration experiments reveal that CO and CH 4 originate from the photocatalytic CO 2 conversion, further highlighting the potential of this work in advancing CO 2 photoreduction . This study offers novel insights into designing effective S-scheme heterojunction photocatalysts for practical applications to address environmental and energy challenges.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Rui Li,Qiongke Shi,Luyang Zuo,Yingjun Chen,Wenqiang Li,Huitao Fan,Bo Li,Liya Wang
The shortage of fossil energy has become a growing global concern. It is particularly important to make full use of the infinite solar energy resources, and transform them into sustainable and clean energy. The development of hydrogen energy has become a feasible solution to solve the energy shortage problem. The preparation of photocatalysts featuring efficient charge transfer channels and high hydrogen production activity provides a pathway for the development of hydrogen energy. In this paper, we report for the first time the direct assembly of 2D ZnIn 2 S 4 (ZIS) nanosheets on the surface of CoTiO 3 (CTO). The synthesized CoTiO 3 /ZnIn 2 S 4 (CTO/ZIS) photocatalyst features a direct Z-scheme charge transfer channel, which enhances the separation rate of photogenerated carriers, and accelerates the photocatalytic H 2 evolution (PHE) rate. Without the assistance of any co-catalyst, the PHE rate of prepared CoTiO 3 /ZnIn 2 S 4 was as high as 5.21 mmol g −1 h −1 . Moreover, the H 2 evolution rate of CoTiO 3 /ZnIn 2 S 4 almost did not decrease significantly after four consecutive 4 h cycles. This investigation provides a valuable approach for the exploitation of novel and efficient Z-scheme photocatalysts in the application of solar energy to hydrogen energy conversion.
研究领域:
材料科学
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物理化学
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能源化学
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光催化
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纳米材料
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可再生能源
✓ 已验证
DOI
高影响因子
Carbon Neutrality
·
2024
·Vol. 3
·期 1
·1-16
·
IF 0
Liu Xinghui,Naraginti Saraschandra,Zhang Fuchun,Sathishkumar Kuppusamy,Saxena Kuldeep K.,Guo Xiang
Environmental contamination by hexavalent chromium (Cr(VI)) and antibiotic drug residues pose significant challenges to public health and ecosystems. This study investigates the application of CoTiO 3 /BiVO 4 @MIL-Fe(53) (CT/BV@Fe-MOF) for the reduction of Cr(VI) and degradation of tetracycline (TCL) under visible light. After grafting an iron-based metal–organic framework MIL-Fe(53) on a modified CoTiO 3 /BiVO 4 composite, the photogenerated electrons could easily be transferred from CoTiO 3 to BiVO 4 /Fe-MOF species via interfacial charge transfer. UV–vis diffuse reflectance spectroscopy showed that charge carriers were formed in response to visible light absorption. The effect of different operating parameters, including catalyst load, pH, initial Cr(VI), and TCL concentration, was systematically evaluated during the photocatalytic process. The CT/BV@Fe-MOF composite exhibited 98.7% reduction efficiency in Cr(VI) (50 ppm) and 97.5% degradation efficiency towards TCL (30 ppm) within 90 min, resulting in a greater efficiency than the pristine CoTiO 3 , BiVO 4 , and Fe-MOF materials. The CT/BV@Fe-MOF composite displayed excellent stability over six cycles, highlighting its potential for practical applications. In addition, the plausible degradation pathway of TCL was evaluated using LC-ESI/MS analysis, while the TEST program was utilized to investigate the toxicity of the products generated during the degradation process.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
Materials Research Express
·
2022
·Vol. 9
·期 9
·095504
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IF 2.025
Xiaohui Zhao,Hui Zhou,Qiong Hua,Chengyu Wang,Xiaodan Wang,Ke Zhang,Hongpei Zhang,Binguo Zheng,Junling Niu
The chemical degradation of sulfate by activated Oxyone has the advantages of high degradation capacity, wide pH range and convenient transportation and storage, making it one of the most attractive advanced oxidation processes (AOPs). Besides, Co is the metal most capable of activating Oxone to produce sulfate. Therefore, it is critical to develop Co-based catalyst, an effective and recyclable heterogeneous catalyst, for activating Oxone to degrade tetracycline. In this study, CoTiO3 was extensively investigated for the activation of Oxone to generate sulfate radicals and degrade tetracycline antibiotics. The results showed that more than 95% of tetracyclines could be degraded at the amount of CoTiO3 catalyst of 0.02 g, the Oxone reagent concentration of 0.4 mmol l−1, and the pH value of 7. The removal rate of tetracyclines could still reach more than 85% after the CoTiO3 composite was repeatedly used for four consecutive cycles. These results indicate that CoTiO3/Oxone can be explored as an effective system for degrading long-lived organic pollutants.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Jiahao Wei,Jingtao Bi,Longfei Zhang,Dandan Han,Junbo Gong
Constructing a robust catalytic membrane with simultaneous fast liquid transport and efficient organic pollutant degradation is appealing for efficient organic wastewater treatment. Herein, Fe-doped CoTiO 3 grew uniformly on the SiO 2 fiber membrane to form a catalytic membrane (FCTSM). Benefiting from the great water wettability, FCTSM facilitated fast water transport with low energy consumption and exhibited high physical separation performance (98.4% rejection of oil in the emulsion). The catalytic active sites were fully exposed on membrane surface, which could easily react with peroxymonosulfate and target pollutants. Under the gravity-driven permeation, FCTSM performed decent catalytic degradation property (e.g., 96.3% removal of nimesulide with the flux of 300 L/m 2 ·h) in the presence of peroxymonosulfate. Electron paramagnetic resonance (EPR) spectra and quenching tests found that SO 4 •− and 1 O 2 were involved in pollutant degradation, and the possible degradation pathway of nimesulide was investigated. Besides, the toxicity analyses based on quantitative structure–activity relationship (QSAR) verified the reduced toxicity of degradation products. This work provides an insight into the design of multifunctional membranes and advances the potential applications of heterogeneous catalytic oxidation in environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 4
·1407-1418
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IF 2.8
Quan Lijun,Li Ying,Gu Wenwen,Su Ting,Luo Yunan,Liu Mengjiao,Lai Xin,Bi Jian,Gao Daojiang,Zhao Yan
As a research hotspot in recent years, Ti-based anode materials for lithium ion batteries (LIBs) have advantages including long cycle life and excellent cyclic stability. However, its application is further limited by its poor conductivity and low reversible capacity. Herein, a series of porous hexagonal prism Zn-doped CoTiO 3 have been designed and prepared by simple co-precipitation method followed by calcination. The influences of Zn doping concentration on the microstructure and electrochemical performance are further explored. The results indicate that Zn doping has little effect on the microstructure of CoTiO 3 and can elevate capacity, cyclic stability, and rate capability. When Zn doping concentration is set as 0.1, the sample Co 0.9 Zn 0.1 TiO 3 gives the best electrochemical performance. The reversible capacity can be maintained at 430.6 mAh g −1 at a current rate of 0.2 C after 280 cycles. This work can pave an effective strategy for improving the electrochemical performance of other Ti-based anode materials.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 19
·14194-14204
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IF 2.9
Jianhua Zheng,Yiming Gao,Bingbing Wang,Zhenping Guan,Guangming Yin,Heshan Zheng,Yong Li,Xiangyu Cao,Shunji Zheng
Constructing Z-scheme heterojunctions incorporating an exquisite hollow structure is an effective performance regulation strategy for the realization of high quantum efficiency and a strong redox ability over photocatalysts. Herein, we report the delicate design and preparation of a core–shell hollow CdS@CoTiO3 Z-scheme heterojunction with a CdS nanoparticle (NP)-constructed outer shell supported on a CoTiO3 nanorod (NR) inner shell. The in situ growth synthetic method led to a tightly connected interface for the heterojunction between CdS and CoTiO3, which shortened the transport distance of photoinduced charges from the interface to the surface. The promoted charge carrier separation efficiency and the retained strong redox capacity caused by the Z-scheme photoinduced charge-transfer mechanism were mainly responsible for the boosted photocatalytic performance. Additionally, the well-designed core–shell structure afforded a larger interfacial area by the multiple direction contact between CdS and CoTiO3, ensuring sufficient channels for efficient charge transfer, and thus further boosting the photocatalytic activity. As an efficient photocatalyst, the optimized CdS@CoTiO3 nanohybrids displayed excellent 2,4-dichlorophenol (2,4-DCP) and tetracycline (TC) degradation efficiencies of 91.3% and 91.8%, respectively. This study presents a Z-scheme heterojunction based on ecofriendly CoTiO3, which could be valuable for the development of metal perovskite photocatalysts for application in environmental remediation, and also demonstrated the tremendous potential of integrating a Z-scheme heterojunction with the morphology design of photocatalyts.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2018
·Vol. 61
·期 8
·1057-1066
·
IF 4.318
Huang Zhen-Dong,Zhang Ting-Ting,Lu Hao,Yang Jike,Bai Ling,Chen Yuehua,Yang Xu-Sheng,Liu Rui-Qing,Lin Xiu-Jing,Li Yi,Li Pan,Liu Xianming,Feng Xiao-Miao,Ma Yan-Wen
Durability, rate capability, capacity and tap density are paramount performance metrics for promising anode materials, especially for sodium ion batteries. Herein, a carbon free mesoporous CoTiO 3 micro-prism with a high tap density (1.8 g cm −3 ) is newly developed by using a novel Co-Ti-bimetal organic framework (BMOF) as precursor. It is also interesting to find that the Co-Ti-BMOF derived carbon-free mesoporous CoTiO 3 micro-prisms deliver a superior stable and more powerful Na + storage than other similar reported titania, titanate and their carbon composites. Its achieved capacity retention ratio for 2,000 cycles is up to 90.1% at 5 A g −1 .
研究领域:
材料科学
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电化学
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纳米能源
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储能技术
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无机功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Haitao Li,Qiang Gao,Guanshuai Wang,Bo Han,Kaisheng Xia,Chenggang Zhou
Catalytic performance of a heterogeneous cobalt-based catalyst for advanced oxidative process (AOP) correlates tightly with its structure and composition. The main objective of this study is to maximize the utilization and accessibility of cobalt sites while enhancing their activity and stability through rational structural and composition designs, and thus to achieve an excellent performance for heterogeneous peroxymonosulfate (PMS) activation. To this end, a novel CoTiO 3 /TiO 2 composite (CTT), composed of CoTiO 3 overlayer on nanosheets-assembled hierarchical TiO 2 nanospheres, was elaborately designed and synthesized. The resulting CTT possessed certain features including CoTiO 3 -rich surface, large surface area (114.8 m 2 g −1 ), and highly open porous channels, which afforded sufficient accessible active sites against undesirable particle agglomeration and shedding. Moreover, cobalt sites of CTT exhibited a higher activity toward PMS than those of Co 3 O 4 due to the composition-induced distinct adsorption nature, easy electron transfer, and strong bond-weakening ability. Benefitting from the unique combination of structural and compositional advantages, CTT manifested remarkable catalytic efficiency, low cobalt leaching (0.078 mg L −1 ), and excellent reusability in activation of PMS for degradation of the emerging antibiotic pollutant metronidazole (MNZ). The potential degradation pathway for MNZ and the catalytic mechanism were further elucidated. The design strategy proposed in this study may provide a new opportunity for future development of high-performance heterogeneous cobalt-based catalysts in remediation of aquatic environment.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Water Research & Technology
·
2022
·Vol. 8
·期 8
·1763-1776
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IF 5.819
Di Li,Mingyang Long,Qianqian Zhao,Hongmiao Li,Qi Wen,Fang Song
Nanosized CoTiO3, NiTiO3 and Fe2TiO5 photocatalysts were synthesized by a simple sol–gel method successfully. However, they showed lower photocatalytic activity for the degradation of oxytetracycline hydrochloride under visible light irradiation. After the CoTiO3, NiTiO3 and Fe2TiO5 nanoparticles were loaded in the SBA-15 channels, the photocatalytic activity was enhanced obviously. In order to further enhance the removal efficiency of CoTiO3/SBA-15, NiTiO3/SBA-15 and Fe2TiO5/SBA-15, they were used to activate peroxymonosulfate under visible light irradiation. In particular, CoTiO3/SBA-15 could completely photodegrade oxytetracycline hydrochloride with the assistance of peroxymonosulfate in an hour. The influencing factors on activating peroxymonosulfate to degrade oxytetracycline hydrochloride were investigated in detail. In addition, the electron transfer and peroxymonosulfate activation mechanism for the efficient improvement in the photocatalytic performance were also proposed and proved by radical quenching experiments, electron spin resonance analysis, X-ray photoelectron spectroscopy, transient photocurrent responses and cyclic voltammetry. It was found that the combined activation effects of photogenerated electrons and transition metals on peroxymonosulfate to produce sulfate radicals could enhance the degradation efficiency obviously. This study could provide a new way for the synergetic effect of photocatalysis and peroxymonosulfate activation by transition metal to be used for efficient photocatalytic degradation in the field of antibiotic removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）