Catalysis Science & Technology
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2025
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IF 4.2
Guoyu Xu,Yanan Chen,Peiling Lin,Zizhong Zhang,Tao Ji,Wenyue Su
Employing photocatalytic technology to transform CO2 into valuable fuels is considered a promising solution for addressing the exacerbated greenhouse effect and energy crisis. The development of photocatalysts featuring superior charge separation efficiency is pivotal for the widespread implementation of photocatalytic CO2 reduction technologies. Herein, zero-dimensional (0D) NixP nanoparticles are anchored onto two-dimensional (2D) LaTiO2N nanosheets by a photo-deposition method, and a NixP/LaTiO2N Schottky junction composite with excellent photocatalytic CO2 reduction performance is constructed. The optimal NixP/LaTiO2N composite achieves CO and CH4 yields of 9.39 and 4.15 μmol g−1 h−1, respectively, with the utilized photoelectron number (UPN) reaching 51.98 μmol g−1, which is approximately 9.7 times higher than that of LaTiO2N alone. The improved photocatalytic performance of the composites can be attributed to the formation of Schottky junctions, which effectively suppress the recombination of photogenerated carriers. This study provides a new idea for the development of 0D/2D Schottky junction photocatalysts.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaohui Ma,Wenjun Li,Chaojun Ren,Hongda Li,Xinyang Li,Mei Dong,Ying Gao,Tianyu Wang,Hualei Zhou,Yanyan Li
Herein, we report the synthesis of ZnIn 2 S 4 nanoparticles on bulk WC by a facile hydrothermal process to construct novel and highly efficient noble metal-free Schottky junction heterojunction photocatalysts. Morphology characterization revealed that the ZnIn 2 S 4 nanoparticles were deposited on the surface of the WC. Meanwhile, the combination of the ZnIn 2 S 4 and the metal-like WC formed the Schottky energy barrier, which greatly promoted the migration and separation of photo-generated carriers. Especially, the optimal ZnIn 2 S 4 /WC photocatalysts have a lower overpotential for hydrogen evolution (−0.35 V) than pristine ZnIn 2 S 4 (−0.49 V). The hydrogen production ability of the optimal ZnIn 2 S 4 /WC photocatalyst (2400.3 μmol·h −1 ·g −1 ) was approximately 9.2 times higher than that of ZnIn 2 S 4 -1% Pt (260.1 μmol·h −1 ·g −1 ). Photocatalytic experiments demonstrated that metal-like WC plays an important role in replacing precious metal to increase the active site of ZnIn 2 S 4 . Moreover, a feasible Schottky junction reaction mechanism of intensive photocatalytic activity was discussed. This study proves that it is a very fascinating strategy to combine the advantages of ZnIn 2 S 4 and metal-like to construct Schottky heterojunction for photocatalytic hydrogen production.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Pengnian Shan,Kun Geng,Li Guo,Liqiang Kuang,Yu Shen,Bo Xiong,Jianhua Hou,Feng Guo,Guangzhao Wang,Weilong Shi
To advance the development of clean and sustainable energy, photocatalytic H 2 production emerges as an innovative technology that harnesses natural sunlight and water resources to address the current energy crisis. Based on significant contributions of the built-in electric field and photothermal effect for boosted photocatalytic hydrogen production, we developed a core–shell photocatalyst with Co spheres as the core and ZnIn 2 S 4 (ZIS) nanoflowers as the shell to achieve effective synergy between these two effects. Under the strong synergistic influence of the Schottky barrier and photothermal effect, this optimized photocatalyst achieved a maximum photothermal-assisted photocatalytic hydrogen evolution rate of 8.3 mmol g −1 h −1 , which is approximately 11 times that of the pure ZIS, with an apparent quantum efficiency (AQE) of 11.34 % under the wavelength of 420 nm. The Schottky barrier formed between ZIS and Co facilitates the transfer of electrons from Co to ZIS, while the photothermal effect increases the catalyst’s temperature and further enhances the separation efficiency of photogenerated electrons and holes. This work highlights the potential applications of the synergistic effects of Schottky junctions and photothermal effects in the conversion of solar energy into chemical energy.
研究领域:
材料科学
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能源转换
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 36
·16972-16980
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IF 3.3
Yan Shang,Jing Xu,Yue Ma,Zezhong Li,Qian Li
The Mn0.2Cd0.8S/NiCo2S4 was prepared using an electrostatic self-assembly method. It was confirmed by analyses of the crystal structure, morphology, and elemental composition. The photoelectrochemical measurement confirmed that Mn0.2Cd0.8S and NiCo2S4 had a close interaction and can form a Schottky barrier. The construction of the Schottky junction speeded up the transport of the photogenerated electrons and inhibited the recombination of the photogenerated electrons and holes. Using Mn0.2Cd0.8S/NiCo2S4, the amount of hydrogen production was higher than with NiCo2S4 and Mn0.2Cd0.8S alone. Different amounts of NiCo2S4 were loaded onto Mn0.2Cd0.8S for the photocatalytic hydrogen production reaction. The hydrogen photocatalytic hydrogen production of Mn0.2Cd0.8S/NiCo2S4-3 was 28.97 times higher than of the Mn0.2Cd0.8S. The Mn0.2Cd0.8S/NiCo2S4 composite exhibited excellent photocatalytic activity and stability, which provided reference values for exploring bimetallic sulfide composite materials, and demonstrated great potential in photocatalytic applications.
研究领域:
材料科学
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光催化
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Yuejia Yin,Yajie Chen,Xinyan Yu,Qiuyu Zhang,Yaxin Ru,Guohui Tian
During the photocatalytic CO 2 reduction process, fast charge transport, abundant active sites, and high visible light utilization in photocatalysts are key to achieving excellent CO 2 conversion efficiency. In this work, we have designed and prepared hierarchical CuS@SnS 2 p-n heterostructure hollow cubes for photocatalytic CO 2 reduction. First, a monolayer of CuS was in situ generated on the pre-prepared Cu 2 O cubes to construct core–shell Cu 2 O@CuS cubes by sulfidation of Cu 2 O cubes. The following etching process led to the formation of CuS hollow cubes. Finally, the hierarchical CuS@SnS 2 p-n heterostructure hollow cubes were obtained by growing SnS 2 nanosheets on the CuS hollow cubes. The prepared CuS@SnS 2 p-n heterostructure hollow cubes showed an improved photocatalytic CO 2 reduction activity compared with the bare CuS and SnS 2 control samples. The p-n heterojunction formed between SnS 2 and CuS as well as its hollow structure enhanced the charge carrier separation efficiency and the light absorption capacity of the hybrid catalyst. Furthermore, after the decoration of Au nanoparticles, the formed Schottky junction further discouraged the charge carrier recombination. Thus, the cooperative p-n heterojunction and Schottky junction greatly facilitated photocatalytic CO 2 reduction, and exhibiting the maximum CO and CH 4 yields of 140.1 and 77.5 μmol g −1 h −1 , respectively. This work presents an efficient design of high-performance catalysts for photocatalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2022
·Vol. 12
·期 6
·778
·
IF 2.67
Shunhong Dong,Juan Wu,Lanlan Huang,Hong-En Wang
Narrowing the band gap and increasing the photodegradation efficiency of TiO2-based photocatalysts are very important for their wide application in environment-related fields such as photocatalytic degradation of toxic pollutants in wastewater. Herein, a three-dimensionally ordered macroporous Pt-loaded TiO2photocatalyst (3DOM Pt/TiO2) has been successfully synthesized using a facile colloidal crystal-template method. The resultant composite combines several morphological/structural advantages, including uniform 3D ordered macroporous skeletons, high crystallinity, large porosity and an internal electric field formed at Pt/TiO2interfaces. These unique features enable the 3DOM Pt/TiO2to possess a large surface for photocatalytic reactions and fast diffusion for mass transfer of reactants as well as efficient suppression of recombination for photogenerated electron-hole pairs in TiO2. Thus, the 3DOM Pt/TiO2exhibits significantly enhanced photocatalytic activity. Typically, 88% of RhB can be degraded over the 3DOM Pt/TiO2photocatalyst under visible light irradiation (λ ≥ 420 nm) within 100 min, much higher than that of the commercial TiO2nanoparticles (only 37%). The underlying mechanism for the enhanced photocatalytic activity of 3DOM Pt/TiO2has been further analyzed based on energy band theory and ascribed to the formation of Schottky-type Pt/TiO2junctions. The proposed method herein can provide new references for further improving the photocatalytic efficiency of other photocatalysts via rational structural/morphological engineering.Keywords:3D ordered macropores;TiO2;Pt loading;photocatalysis;Schottky junction
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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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Tianxun Gong,Mengya Yu,Zhenyi Liu,Luyu Lv,Wen Huang,Xiaosheng Zhang
Strain engineering has emerged as a powerful technique for modulating the bandgap in two-dimensional (2D) materials, including transition metal dichalcogenides (TMDCs) and graphene, which are critical for structural optimization in nanoelectronics and optoelectronics. Despite the promise of these materials, a significant challenge remains in achieving precise and controllable strain effects, particularly in graphene, to exploit its full potential in device applications. This gap in controllability limits the ability to fully leverage the sensitive changes in interfacial properties that strain can induce in 2D materials. Here, we present an approach to precisely control strain effects in monolayer graphene by applying mechanical force through a ZnO array substrate. The ZnO arrays were fabricated with controlled dimensions using lithographic templates, allowing for accurate strain modulation when graphene was wet-transferred onto the array. This method enabled effective coupling between the strain in graphene and the graphene/ZnO Schottky junction, significantly enhancing the device's optoelectronic performance. The resulting device demonstrated a broad response from ultraviolet to visible spectrum. Remarkably, the device achieved an outstanding responsivity of 39.1 mA W⁻¹ at 320 nm with a 3V bias. These findings provide a practical and innovative solution to the challenges of strain engineering in 2D materials.
研究领域:
材料科学
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纳米电子学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Weiwei Mao,Haiping He,Zhizhen Ye,Jingyun Huang
A facile and one-step transformation towards graphene using nickel foams as the substrate into a contact between semiconducting graphene (SG) and metal is developed for fabricating a SG/Ni Schottky junction. Graphene quantum dots were cut away via the electrochemical redox method and porous three-dimensional graphene with a bandgap was generated due to the abundant defects and dangling bonds . The constructed Schottky junction is the inner drives of accelerating charge transfer and thus results in significantly enhanced electrocatalytic effect. Bio-inspired porous graphene integrates micro-nano pores and functional groups, which greatly benefits to molecules separation and specific electrocatalysis . Macroscopic pores and numerous nanopores serve as “highways” for the rapid mass transport. Massive defects and rich dangling bonds act as “perceptrons” to reflect the charge distribution change. As a successful demonstration, the fabricated SG/Ni Schottky junction exhibits appreciable electro-oxidation towards H 2 O 2 with an ultrahigh sensitivity of 4838 μA mM −1 cm -2 and an ultralow detection limit of 20 nM. This study puts forward an easy and practicable strategy to construct a Schottky junction, which is promisingly applied in other electrochemical research.
研究领域:
材料科学
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电化学
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生物医学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Yachao Xu,Zhong Zhou,Peng Yu,Ying Wang
Synergistically tuning electronic states at the atomic level to facilitate photocatalytic overall water splitting is a challenge. However, elucidation of the role of specific electronic states of Znln 2 S 4 (ZIS) in regulating both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is still scarce, making it difficult to accurately predict the actual photocatalytic performance. Here, the substitution of Zn sites with Al atoms was found to modulate the potential difference of the ZIS surface domain heterojunction structure, and electrons were further transferred to CuS to form a built-in field that promotes charge separation. When Al doping is present on the ZIS surface, ZIS exhibits p-type semiconductor properties, which leads to the formation of p-n junctions within Al-CuS/ZIS itself. Due to the large work function and metallic properties of CuS, and Al-CuS/ZIS as a whole tends to form a Schottky heterojunction, and the two heterojunction structures synergistically promote the migration of photogenerated carriers. In addition, the Al doping changes the electronic states around the ZIS, allowing the Al ZIS to promote the adsorption of O* and H* during OWS. The solar-driven photocatalytic overall water splitting efficiency of Al-CuS/ZIS is as high as 153.6 (HER) and 73.1 (OER) μmol/h g −1 , which is about 10 times that of ZIS. This work opens the possibility to design efficient photocatalytic materials through tunable composition and electronic structure.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jun Yang,Quanxi Zhu,Zhigang Xie,Yajing Wang,Jiankang Wang,Yuan Peng,Yingying Fang,Lihua Deng,Taiping Xie,Longjun Xu
It is very significant to boost separation efficiency of photoinduced charge carriers and to extend absorption light range from ultraviolet light into visible light region for photocatalysts . Here, Ti 3 C 2 incorporation boosted the separation efficiency of photogenerated carriers of MoS 2 , extended absorption light region, heightened the absorption intensity of visible light, and enhanced photocatalytic stability. The rhodamine B (RhB) solution could be completely degraded using MoS 2 /Ti 3 C 2 under visible light after only 30 min. The comparing evaluation of photocatalytic activity signified that the reaction kinetics of RhB photodegradation over MoS 2 /Ti 3 C 2 increased 1.4 and 3 times under UV light and visible light irradiation , respectively. Experimental tests and density functional theory (DFT) calculation confirmed the formation of MoS 2 /Ti 3 C 2 Schottky junction, in which Ti 3 C 2 served as electron sink. The photogenerated electrons in MoS 2 easily transferred to Ti 3 C 2 phase due to driving force of built in electric field, which realized efficient separation of photocarriers and prolonged the life span of photoproduced holes. We sincerely hoped this catalyst could be widely applied in wastewater treatment field.
研究领域:
材料科学
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环境科学
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理论计算
✓ 已验证
DOI
高影响因子
Materials Reports: Energy
·
2023
·
IF 0
Xiu-Qing Qiao,Wenxuan Chen,Chen Li,Zizhao Wang,Dongfang Hou,Bojing Sun,Dong-Sheng Li
Photocatalytic water splitting on noble metal-free photocatalysts for H 2 generation is a promising but challenging approach to realize solar-to-chemical energy conversion. In this study, Mo/Mo 2 C nanoparticles anchored carbon layer (Mo/Mo 2 C@C) was obtained by a one-step in-situ phase transition approach and developed for the first time as a photothermal cocatalyst to enhance the activity of ZnIn 2 S 4 photocatalyst. Mo/Mo 2 C@C nanosheet exhibits strong absorption in the full spectrum region and excellent photo-thermal conversion ability, which generates heat to improve the reaction temperature and accelerate the reaction kinetics. Moreover, metallic Mo/Mo 2 C@C couples with ZnIn 2 S 4 to form ZnIn 2 S 4 –Mo/Mo 2 C@C Schottky junction (denoted as ZMM), which prevents the electrons back transfer and restrains the charge recombination. In addition, conductive carbon with strong interfacial interaction serves as a fast charge transport bridge. Consequently, the optimized ZMM-0.2 junction exhibits an H 2 evolution rate of 1031.07 μmol g −1 h −1 , which is 41 and 4.3 times higher than bare ZnIn 2 S 4 and ZnIn 2 S 4 –Mo 2 C, respectively. By designing novel photothermal cocatalysts, our work will provide a new guidance for designing efficient photocatalysts.
研究领域:
材料科学
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能源化学
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纳米技术
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Peiyao Lin,Jun Shen,Xiaohui Yu,Qinqin Liu,Dongsheng Li,Hua Tang
construction of the Schottky-junction is considered to be a valid route to boost the spatial charge separation and transfer of the photocatalytic system. Herein, two-dimensional (2D) O-doped g-C 3 N 4 nanosheets were prepared by an annealing route, and then a 2D/2D Ti 3 C 2 MXene/O-doped g-C 3 N 4 Schottky-junction was fabricated using an in-situ electrostatic assembly of negatively charged Ti 3 C 2 MXene and positively charged O-doped g-C 3 N 4 nanosheets. The as-prepared Ti 3 C 2 MXene/O-doped g-C 3 N 4 Schottky-junction exhibited almost two times enhanced hydrogen evolution (25124 μmol/g/h) in comparison to pristine O-doped g-C 3 N 4 (13745 μmol/g/h) and Ti 3 C 2 MXene/pristine C 3 N 4 (15573 μmol/g/h). Based on fully characterizations and theory calculation, the enhanced photocatalytic performance could be attributed to the synergy effect of intimate 2D/2D interfacial contact and the construction of Schottky-junction, which result in the short charge transport distance from HCN to Ti 3 C 2 MXene and efficient separation of the photo-generated charge. This study will provide new insight into developing 2D/2D Schottky-junction photocatalysts for the solution of the energy crisis.
研究领域:
材料科学
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能源化学
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催化化学
✓ 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）