RENEWABLE ENERGY
·
2025
·
IF 9.1
Lina Dai,He Wang,Liru Cui,Yanduo Liu
Single photocatalysts face problems such as easy recombination of photo-generated charge carriers, weak oxidation-reduction ability, and narrow spectral response range, which greatly restrict their practical applications in energy and environmental fields. This article constructs a new type of Cu-Co Prussian blue analogues S-scheme photocatalytic material. The material is composed of oxidized photocatalysts (Ag 3 PO 4 ) and reduced photocatalysts (Cu-Co PBAs). By utilizing the characteristics of Cu-Co Prussian blue analogues photocatalysts, such as high conduction band position, rich catalytic sites, and small band gap, photocatalytic efficiency can be significantly enhanced. The CO production rate is 36.3 μmol/g/h, and the selectivity can reach 93.8 %, which is far superior to the current mainstream photocatalytic system. By studying the construction method and CO 2 reduction performance of the composite photocatalyst, the structure-performance relationship is clarified. The steady-state photocurrent spectroscopy reveals the S-scheme mechanism photocarrier transfer and separation kinetics. Techniques such as near-ambient pressure X-ray photoelectron spectroscopy reveal the interface electron transfer mechanism. In-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy and Density Functional Theory calculations are used to study the formation of reaction intermediates and reveal the catalytic mechanism. This study will offer critical understanding for advancing developments of selective photocatalysts aimed at sustainable CO 2 utilization.
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
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 8
·4785-4793
·
IF 3.9
Dafeng Zhang,Ruiqi Zhang,Junchang Liu,Xipeng Pu,Peiqing Cai
Photocatalytic H 2 evolution technique has been proved to be one of the promising approaches to overcome the present energy and environmental issues caused by the combustion of fossil fuel. Constructing heterojunction can realize the efficient separation and migration of charges and thus achieve enhanced H 2 evolution performance. Herein, we designed and prepared a ZnIn 2 S 4 /BiFeO 3 heterojunction photocatalyst with a 3D/2D structure via an ultrasonic self-assembly process. The typical 3D/2D structure with intimate interface was obtained, which not only provided more active sites but also boosted the migration of photogenerated charges. The optimal mass ratio of BiFeO 3 in ZnIn 2 S 4 /BiFeO 3 was determined to be 10%, and a 10.5-fold increase in H 2 evolution rate in comparison with of pure ZnIn 2 S 4 was achieved. Furthermore, the ZnIn 2 S 4 /BiFeO 3 composite exhibited excellent recyclability and structural stability based on cycling experiment. A S-scheme heterojunction mechanism was revealed according to the experimental results of photocatalytic H 2 evolution and electrochemical tests.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Pengfei Wang,Yao Liu,Ning Jiang,Ruisen Jing,Shutao Li,Qian Zhang,Huiqiang Liu,Junshan Xiu,Zhao Li,Yunyan Liu
A ternary heterojunction composite photocatalyst g-C 3 N 4 /AgBr/black phosphorus was constructed by co-modifying AgBr with g-C 3 N 4 (CN) and black phosphorus nanosheets (BPNs). The photoluminescence (PL), photocurrent intensity and electrochemical impedance spectroscopy (EIS) results proved that, compared with bare AgBr and binary CN/AgBr and AgBr/BPNs, ternary CN/AgBr/BPNs effectively promoted the separation and suppresses the recombination of electron-hole pair. The photocatalytic experiment proved that the CN/AgBr/BPNs photocatalyst exhibited almost 8 times for degradation rate of MO，and well above those of binary CN/AgBr and AgBr/BPNs. According to trapping experiments of the active species, the analysis of the energy band , we proposed the double S-scheme to explain the charge transfer and the boosting of photocatalytic activity in ternary CN/AgBr/BPNs. Impressively, this double S-scheme facilitated the transmittance of electrons at the CB position of AgBr to the VB of CN and BPNs, and greatly overcome the light corrosion and enhance the stability of AgBr. This work designed a novel S-scheme mechanism heterojunction photocatalytic material, which provides a convenient way for efficient wastewater treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xinxin Yuan,Jieyi Yang,Yiyang Yao,Hui Shen,Yue Meng,Bo Xie,Zheming Ni,Shengjie Xia
Single-phase photocatalysts exhibit low performance of photocatalytic degradation of pollutants, which is mainly due to the fact that most intrinsic photocatalysts can only produce one active species for degradation reactions. In order to solve this problem, the 0D/2D Cu 2 O/BiOCl S-scheme heterojunction was successfully constructed through a facile hydrothermal route. The obtained 0D/2D Cu 2 O/BiOCl displays high catalytic activity for tetracycline (TC) photodegradation, and 90.3% of TC was photodegraded within 80 min, which is much better than that by pure Cu 2 O and BiOCl. The excellent photocatalytic activity can be ascribed to the formation of S-scheme heterostructures, which enables the photocatalyst to generate superoxide radicals and hydroxyl radicals, and at the same time, makes the oxidation potential more positive and the reduction potential more negative. It is further proved by the results of experimental characterization and theoretical calculation show that the built-in electric field between Cu 2 O and BiOCl is a key factor in inducing the path of S-scheme electron transmission. In addition, the effects of various reaction conditions, including catalyst dosage, pH value and reaction temperature, on the photodegradation of tetracycline were discussed in detail. The intermediates and degradation path were also discussed in detail by liquid chromatography-mass spectrometry.
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
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Chen Yang,Jian Yang,Shuangshuang Liu,Mingxue Zhao,Xu Duan,Hongli Wu,Lang Liu,Weizao Liu,Jiangling Li,Shan Ren,Qingcai Liu
Owing to its feasibility, efficiency in light-harvesting and effectiveness in the interfacial charge transfer between two n-type semiconductors, constructing heterojunction photocatalysts have been identified as an effective way for enhancing the photocatalytic properties. In this research, a C–O bridged CeO 2 /g-C 3 N 4 (cCN) Step-scheme (S-scheme) heterojunction photocatalyst was constructed successfully. Under visible light irradiation, the cCN heterojunction exhibited the photocatalytic degradation efficiency of methyl orange, which was about 4.5 and 1.5 times higher than that of pristine CeO 2 and CN, respectively. The DFT calculations, XPS and FTIR analyses demonstrated the formation of C–O linkages. And the calculations of work functions revealed the electrons would flow from g-C 3 N 4 to CeO 2 due to the difference in Fermi levels , resulting in the production of internal electric fields . Benefiting from the C–O bond and internal electric field, the photo-induced holes in the valence band of g-C 3 N 4 and the photo-induced electrons from conduction band of CeO 2 would be recombined when exposed to visible light irradiation, while leaving the electrons with higher redox potential in the conduction band of g-C 3 N 4 . This collaboration accelerated the separation and transfer rate of photo-generated electron-hole pairs, which promoted the generation of superoxide radical (•O 2 − ) and improved the photocatalytic activity .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 19
·6949
·
IF 4.6
Heng Guo,Yangzhou Deng,Haoyong Yin,Juanjuan Liu,Shihui Zou
Fabricating heterostructures with abundant interfaces and delicate nanoarchitectures is an attractive approach for optimizing photocatalysts. Herein, we report the facile synthesis of BiOCl nanoflake/FeOCl nanospindle heterostructures through a solution chemistry method at room temperature. Characterizations, including XRD, SEM, TEM, EDS, and XPS, were employed to investigate the synthesized materials. The results demonstrate that the in situ reaction between the Bi precursors and the surface Cl−of FeOCl enabled the bounded nucleation and growth of BiOCl on the surface of FeOCl nanospindles. Stable interfacial structures were established between BiOCl nanoflakes and FeOCl nanospindles using Cl−as the bridge. Regulating the Bi-to-Fe ratios allowed for the optimization of the BiOCl/FeOCl interface, thereby facilitating the separation of photogenerated carriers and accelerating the photocatalytic degradation of RhB. The BiOCl/FeOCl heterostructures with an optimal composition of 15% BiOCl exhibited ~90 times higher visible-light photocatalytic activity than FeOCl. Based on an analysis of the band structures and reactive oxygen species, we propose an S-scheme mechanism to elucidate the significantly enhanced photocatalytic performance observed in the BiOCl/FeOCl heterostructures.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Junhui Yi,Runkun Xie,Ruilong Liu,Minghao Li,Haoxian Zeng,Qingqing Chen,Linxuan Cai,Ning Li,Changlin Yu,Zhenghui Liu,Dehao Li
The problem of environmental pollution caused by the frequent use of antibiotics has attracted extensive attention. The heterojunction composed of various bismuth oxyiodide (such as BiOI, Bi 4 O 5 I 2 , Bi 5 O 7 I, etc.) were widely used in the treatment of antibiotic wastewater. Herein, a hollow BiOI/Bi 5 O 7 I hierarchical microsphere was constructed in-situ by annealing BiOI precursors synthesized by the solvothermal method. The phase transition temperature for the formation of heterojunctions has been investigated in detail. The obtained products were characterized by various technologies including transmission electron microscope (TEM), X-ray photon-electron spectroscopy (XPS), and so on. Experimental results suggested that 390-BiOI/Bi 5 O 7 I microsphere with hollow structure exhibits the optimal performance and maximum photocurrent response under visible light irradiation. The efficiency for degradation of tetracycline hydrochloride (TH) was up to 83 % in 100 min. The value still maintained at 95 % after the catalyst has been reused for four times. The capture experiment indicates that produced ·O 2 − played the most important role. But formed h + and ·OH played a secondary role. The degradation intermediates were analyzed by Liquid Chromatography-Mass Spectrometry (LC-MS). Accordingly, the possible degradation pathways are proposed. An S-scheme based heterostructure photocatalytic mechanism is proposed aiming to explain the enhanced catalytic performance. The BiOI/Bi 5 O 7 I heterojunction with exceptional activity and stability is bound to expand applications in the field of water treatment .
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Qingming Meng,Meidan Luo,Minggong Lv
The suppression of expeditious complexation of photoexcited carriers and the enhancement of light harvesting are two extraordinarily momentous elements for boosting the catalytic activity of synthesized semiconductor photocatalyst. Herein, a sequence of visible-light-induced self-assembled flower-like spherical Bi 2 WO 6 /BiOBr S-scheme heterojunctions were successfully fabricated by two-step solvothermal process. The fabricated Bi 2 WO 6 /BiOBr hybrids possessed the splendid capacity to catalyze the degradation of bisphenol A (BPA) in water without the addition of surfactant compared to monocomponent photocatalyst. The optimized Bi 2 WO 6 /BiOBr (FBBH-16) possessed the most prominent photocatalytic activity, acquiring a conspicuous degradation efficiency of 91.97 % ± 1.51 % for BPA after 60 min illumination. The rate constant k (0.04078 ± 0.0009985 min −1 ) of FBBH-16, which was approximately 4.0 and 3.5 times that of bare Bi 2 WO 6 and BiOBr, respectively. Such strengthening mechanism was chiefly ascribed to the establishment of S-scheme heterojunction, which efficaciously impeded the complexation of photoexcited charge pairs and noteworthily heightened the light harvesting. Furthermore, the forceful interfacial interactions between Bi 2 WO 6 and BiOBr afforded much more active sites for BPA removal. The quenching experiments confirmed that ·OH and ·O 2− are the principal active species for BPA degradation over Bi 2 WO 6 /BiOBr hybrids. Ultimately, two possible photodegradation pathways of BPA over Bi 2 WO 6 /BiOBr heterojunctions are also come up with on the grounds of the identification of intermediate products. This work furnishes fresh insights into the fabrication of highly efficacious and stable bismuth-based S-scheme heterojunctions for treating the actual wastewater by integrating nanostructure and microscopic morphology.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Junchang Liu,Minghui Zhu,Weijie Yuan,Guoying Yang,Chen Zhang,Huayang Zhang,Dafeng Zhang,Peiqing Cai,Xipeng Pu
A unique lamellar WO 3 /AgI S-scheme heterojunction is constructed via integrated hydrothermal and coprecipitation methods. Optimized WO 3 /AgI composite shows significantly enhanced photocatalytic ciprofloxacin (CIP) degradation under visible light irradiation, achieving a removal rate of 53.4 % within 3 h, which is about 7.63 and 1.56 times superior than those of pristine WO 3 and AgI, respectively. The characterizations, experiment results and Density Functional Theoretical (DFT) calculation results confirm the enhanced light absorption, well-aligned straddling band structures and reasonable formation of S-scheme heterojunction with efficient photogenerated carriers transfer between WO 3 and AgI. Moreover, O 2 − and h + are identified as the main active species, with O 2 − plays a dominant role in WO 3 /AgI during the photocatalytic degradation of CIP. This work elucidates a possible approach to develop photocatalysts with a high antibiotic removal efficiency through a higher reducing ability and stronger oxidizing ability of S-scheme heterojunction by reasonable structure configuration.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiaojiao Jiao,Zexiang Wang,Jing Wang,Tiantian Yao,Zongliang Chen,Chen Chen,Li Sun,Xian Zhao,Weiliu Fan
The reasonable design of g-C 3 N 4 (CN)-based homojunctions is a promising method to improve the photocatalytic performance. Controlling the interfacial charge-transport process is challenging. Herein, Ag and P-doped CN (ACN and PCN) were selectively synthesized. The band edges of CN move downward continuously with increasing Ag or P doping concentration. CN/4ACN (type-II), CN/8PCN (S-scheme) and 4ACN/8PCN (S-scheme) were formed by suitable energy level matching, and their charge transfer mechanisms were confirmed via VB-XPS, UPS and ESR analysis. In the presence of the hole sacrificant triethanolamine (TEOA), both CN/4ACN and 4ACN/8PCN exhibited better H 2 evolution reaction (HER) rate than CN/8PCN due to the improvement in conductivity caused by Ag doping. However, only CN/8PCN and 4ACN/8PCN exhibited HER coupled with tetracycline (TC) degradation performance owing to the high redox potential of the S-scheme. Benefiting from a good carrier transport property and high redox potential, 4ACN/8PCN exhibited the best HER rate (2305.6 μmol·g −1 ·h −1 ) with TEOA as the hole sacrificant, which was 11.7 times than that of pure CN, respectively, and achieved a high HER rate (117.8 μmol·g −1 ·h −1 ) coupled with simultaneous TC degradation. This study provides a basic understanding of CN homojunctions, which shows potential for expanded applications in photocatalytic H 2 evolution and pollutant degradation.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Xu Feiyan,Zhao Feifan,Deng Xianyu,Zhang Jinfeng,Zhang Jianjun,Ai Chenbin,Yu Jiaguo,García Hermenegildo
The rapid increase in atmospheric CO 2 levels due to industrialization underscores the urgent need for innovative carbon valorization strategies. Photocatalytic CO 2 reduction presents a sustainable solution; however, conventional systems suffer from inefficient charge separation and limited product applicability. Herein, a green and scalable tandem strategy is developed by integrating S-scheme photocatalysis with palladium-catalyzed carbonylation. A rationally designed CeO 2 /Bi 2 S 3 heterojunction leverages its hierarchical structure, broad visible-light absorption, oxygen-vacancy-mediated charge dynamics, and the S-scheme charge transfer mechanism to achieve highly efficient photocatalytic CO 2 -to-CO conversion (14.05 mmol g −1 , 98% selectivity). The generated CO is directly utilized in a subsequent carbonylation reaction under mild conditions, yielding high-value amides with near-quantitative CO utilization. This integrated approach eliminates the risks of CO handling and enhances economic viability, providing a direct and effective route for converting CO 2 into fine chemicals. By bridging photocatalysis with industrial catalysis, this work advances sustainable carbon recycling technologies and opens avenues for the development of efficient CO 2 conversion systems.
研究领域:
环境科学
·
催化
·
材料科学
·
化学工程
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Junhui Yi,Xiaojing Xiao,Zhanhong Chen,Zhenhong Ou,Shiting Liang,Ziying Huang,Zhenghui Liu,Dehao Li,Jiaming Zhang,Kaiwei Liu,Guijun Ma,Changlin Yu
Bismuth molybdate has attracted extensive attention as a visible semiconductor photocatalyst with great application potential, but bismuth molybdate is suffering rapid charge recombination and lower catalytic activity. Therefore, a rod-shaped Bi 2 MoO 6 /Bi 14 MoO 24 homoelemental heterojunction was successfully fabricated using hydrothermal treatment and high-temperature calcination combined method. This novel heterojunction shows an excellent photocatalytic activity and good stability. Degradation efficiency of the optimal catalysts is up to 86 % under visible light for 100 min, and remained above 80 % after four cycles. Kelvin probe force microscopy (KPFM) is adopted to further verify faster separation of photogenerated carriers on Bi 2 MoO 6 /Bi 14 MoO 24 heterogeneous nanorods. The result of DFT calculations also further proves that Bi 2 MoO 6 /Bi 14 MoO 24 homoelemental heterojunction has higher work function and lower Fermi level, which can prolonging photogenerated electrons and holes lifetimes. Free radical capture experiments suggest that super oxide anion (•O 2 - ) and hydroxyl (•OH) are main active groups during photocatalytic degradation, which is proved by EPR result. Considering this, a possible S-scheme mechanism is proposed to illustrate this enhanced performance. This research enriches heterojunction system and provides a reference for the design of efficient photocatalysts in future.
研究领域:
光催化
·
材料科学
·
环境科学
·
纳米技术
·
半导体物理
✓ 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）