JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shengyu Zhang,Gongxin Zhang,Shuangzhi Wu,Zhongjie Guan,Qiuye Li,Jianjun Yang
Integration of photothermal materials and photocatalysts can effectively improve photocatalytic hydrogen production. However, the synergistic mechanism of photothermal effect and heterojunction still need to be deeply investigated. Herein, Co 3 O 4 @ZnIn 2 S 4 (ZIS) core–shell heterojunction was constructed as a photothermal/ photocatalytic integrated system for photocatalytic hydrogen production. The photothermal effect induced by Co 3 O 4 boosts the surface reaction kinetic of hydrogen evolution with an apparent activation energy decrease from 42.0 kJ⋅mol −1 to 33.5 kJ⋅mol −1 . The photothermal effect also increases the charge concentrations of Co 3 O 4 @ZIS, which ameliorates the conductivity of Co 3 O 4 @ZIS and thus benefits to charge transfer. In addition, a p-n junction forms between Co 3 O 4 and ZIS and provides a built-in electric field to enhance charge separate and prolong charge life time. Benefiting from the synergy of photothermal effect and heterojunction, the photocatalytic performance of Co 3 O 4 @ZIS is significantly improved with a highest hydrogen evolution rate of 4515 μmol⋅g −1 ⋅h −1 , which is about 3.5 times higher than that of pure ZIS. This work offers a full perspective to understand the photothermal/photocatalytic integrated conception for solar hydrogen production.
研究领域:
材料科学
·
光催化
·
能量转换
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Wen Yang,Yinze Yang,Yun Lou,Zhuhe Zhai,Shengqiang Chen,Yafei Zhao,Huishan Shang,Bing Zhang
Developing core–shell heterostructured photocatalysts with delicate morphology control is deemed as an universal and effective strategy to expedite the separation/transfer of photogenerated carriers toward enhanced photocatalytic hydrogen generation. Herein, a core–shell heterostructure (Co 3 O 4 @ZIS) was constructed with ZnIn 2 S 4 (ZIS) nanosheet as shell and Co 3 O 4 nanorod as core for efficient photocatalytic hydrogen production. As expected, the optimized 4 wt% Co 3 O 4 @ZIS displays a distinguished photocatalytic hydrogen production performance with hydrogen generation rate of 3407.1 µmol g −1 h −1 (about 8.21 times of pure ZIS) and remarkable stability, exceeding most of the ZIS-based photocatalyst in previous reports. The boosted performance is stemmed from the unique core–shell heterostructure of Co 3 O 4 @ZIS, which provides enhanced light absorption and tightly bonded interface, thus accelerating the migration and hindering the recombination of the photoinduced of charge carriers. This work proposes a bright prospect for ZIS based core–shell heterostructures for photocatalytic hydrogen production from water in the presence of TEOA as a sacrificial agent.
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Yulin Zhu,Yan Liang,Jianxian You,Dehua Wang,Jiahao Li,Yanxing Yang,Yong Yang
The resistive gas sensors based on semiconductor materials provide an effective strategy for the detection of harmful gases. However, the limitations of surface gas adsorption activity and interface charge transfer efficiency of semiconductor sensing materials, as well as the complex device fabrication process, pose significant challenges to the development of sensors. Here, a ternary Co3O4/ZnIn2S4/Pt heterostructure arrays gas sensor is designed, which consists of Co3O4 nanowire arrays grown in situ on an alumina flat substrate as backbones, ultrathin ZnIn2S4 nanosheets wrapped around the surface of Co3O4 nanowires, and highly dispersed Pt nanoparticles on the outermost layer. It enables superior sensing performance for the detection of the volatile organic compound triethylamine, which exhibits a significant response of ∼118.97 (Ra/Rg) toward 100 ppm of triethylamine at a relatively low working temperature of 200 °C, along with excellent response/recovery speed, selectivity, and enduring stability (over 3 months). Based on first-principles calculation and a series of spectroscopic characterization (including in situ spectroscopy), it is revealed that the heterostructure arrays exhibited enhanced adsorption activity for both oxygen and triethylamine molecules. Most importantly, the robust p-n heterointerface (Co3O4/ZnIn2S4) and semiconductor-metal heterointerface (Co3O4/Pt, ZnIn2S4/Pt) are formed in the ternary heterostructure, achieving efficient multi-interface charge transfer characteristics. In addition, thanks to the design of in situ 1D/2D/0D porous array structures, the ternary Co3O4/ZnIn2S4/Pt heterostructure arrays not only have large specific surface areas for gas reaction but also simplify device manufacturing. This research offers novel perspectives on boosting the gas sensing performance of semiconductor materials through the comprehensive design of ternary heterostructures with robust multi-interfaces.
研究领域:
材料科学
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化学工程
·
半导体技术
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DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 22
·17665-17674
·
IF 4.6
Hao Ji,Zelin Li,Zhenyi Xu,Lingmin Yao,Rui Tong,Shan Zhang
Developing an efficient visible-light-responsive catalyst for the hydrogen evolution reaction (HER) is essential for addressing energy scarcity and environmental pollution. In this study, one-dimensional Co3O4 (CO) nanoparticles were synthesized via electrospinning and subsequently sulfurized using a low-temperature solvothermal method. These sulfurized one-dimensional CO nanoparticles were then combined with two-dimensional sheet-like ZnIn2S4 (ZIS) to form a p–n heterojunction composite semiconductor photocatalyst (SCO/ZIS). The one-dimensional CO nanoparticles obtained through electrospinning significantly enhance the catalytic activity and efficiency, while sulfurization further improves their electronic structure and surface properties. The built-in electric field at the p–n heterojunction interface between n-type ZIS and p-type SCO effectively inhibits the recombination of photogenerated electron–hole pairs while facilitating electron transfer. Additionally, the incorporation of one-dimensional SCO into sheet-like ZIS prevents ZIS stacking, improving sunlight utilization and substantially enhancing photocatalytic HER performance. Our results demonstrate that SCO/ZIS achieves a superior HER rate of 4300.3 μmol g−1 h−1 under visible light, which is 7.45 times higher than that of pristine ZIS, while also exhibiting excellent photocatalytic stability.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）