ACS Nano
·
2024
·
IF 15.8
Qian Wu,Tian Deng,Juan Cheng,Yujie Yang,Yulan Wang,Yin Xiao,Yufeng Zhang
Periodontitis, a chronic oral disease instigated by bacteria, severely compromises human oral health. The prevailing clinical treatment for periodontitis involves mechanical scraping in conjunction with antibiotics. Phototherapy is employed to rapidly remove the bacteria and achieve periodontitis treatment, effectively circumventing the adverse effects associated with traditional therapies. Constructing 2D/2D van der Waals (VDW) heterojunctions is a key strategy for obtaining excellent photocatalytic activity. Herein, a 2D/2D violet phosphorus (VP)/Ti3C2 VDW heterojunction is designed using an interfacial engineering strategy. By constructing an electron transport “bridge” (P–Ti bond) at the heterogeneous interface as an effective transfer channel for photogenerated carriers, a compact monolithic structure between the VP and Ti3C2 phases is formed, and the spatial barrier for electron transfer at the interface is eliminated. Meanwhile, the strong directional built-in electric field induced by the intensive electron-coupling effect at the heterogeneous interface served as an internal driving force, which greatly accelerates the exciton dissociation and charge transfer in the photocatalytic process. These excited photogenerated electrons and holes are trapped by O2 and H2O on the surfaces of Ti3C2 and VP, respectively, and are subsequently catalytically converted to antibacterial reactive oxygen species (ROS). The VP/Ti3C2 VDW heterojunction eradicated 97.5% and 98.48% of Staphylococcus aureus and Escherichia coli, respectively, by photocatalytic and photothermal effects under visible light for 10 min. The VP/Ti3C2 nanoperiodontal dressing ointment effectively attenuated inflammatory response, reduced alveolar bone resorption, and promoted periodontal soft and hard tissue repair. Its periodontitis therapeutic effect outperforms the clinically used Periocline.
研究领域:
口腔医学
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Huan Wen,Shu Chen,Jian Zuo,Jie Zhang,Canjun Liu,Yang Liu,Keke Wang,Hezhang Chen,Yong Pei
The primary challenge in enhancing the efficiency of solar energy conversion lies in improving the charge separation efficiency for photocatalytic (PC)/photoelectrochemical (PEC) processes, and the construction of heterojunctions represents one of the most effective strategies for promoting charge separation in the bulk phase. However, further investigation is necessary to elucidate the impact of the heterojunction interface structure on charge separation. In this paper, CdS/CdO and CdO/CdS films were prepared using an in-situ phase transformation approach to achieve a well-defined heterojunction interface structure for comparison. The research findings reveal significant disparities in the initiation potential and charge separation efficiency between CdS/CdO and CdO/CdS, with CdS/CdO exhibiting superior PEC properties. Notably, the photocurrent density of CdS/CdO reaches 6.5 mA cm −2 at 1.23 V RHE . This can be attributed to the fact that the favorable alignment of the built-in electric field (BEF) in CdS/CdO with the applied bias direction facilitates efficient charge separation and transmission at the heterojunction interface, as supported by the experimental results, density functional theory (DFT) calculations and finite element analysis (FEA). This finding offers a novel insight for the design and fabrication of high-performance heterojunction photocatalysts and photoelectrocatalysts.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 44
·21065-21077
·
IF 3.925
Zhenlu Liu,Jing Xu,Jiandong Wu,Ye Liu,Lijun Ma,Linying Hu
Photocatalysis is one of the most promising methods to solve the problems of solar energy conversion and sustainable fuel production. Among them, the semiconductor electronic transition to produce hydrogen is the most critical research topic in the field of photocatalysis. ZnS and Ag2Mo2O7 monomers were prepared by the hydrothermal method. The S-scheme heterojunction was formed by electrostatic adsorption of the two materials. The S-scheme heterojunction can improve the separation rate of photogenerated carriers through the built-in electric field so that the hydrogen production rate of the system can reach a maximum of 871.9 μmol g−1 h−1. The system showed a good photoelectric response according to UV-Vis DRS and electrochemistry studies and excellent hydrogen evolution performance. In this study a DFT simulation of the heterojunction interface formed by the system was also carried out, and the relative size of the surface work function indicated the transfer direction and path of electrons.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Yujing Ou,Junqing Shi,Quanqing Yan,Chunlei Li,Yi Zheng
Molten salt synthesis is an efficient method for preparation of photocatalyst. Enhancing precursor mixing effect is important. In this study, we found ethanol is important for synthsis of face-to-face type Bi 4 Ti 3 O 12 /Bi 2 Ti 2 O 7 composite photocatalyst. The prepared Bi 4 Ti 3 O 12 /Bi 2 Ti 2 O 7 (B3) composite under molar ratio of Bi:Ti of 4:3.6 displays higher photocatalytic activity compared with Bi 4 Ti 3 O 12 (B1) and Bi 2 Ti 2 O 7 (B4). The photocurrent density of B3 is 2 times higher than B1 and 1.6 times higher than B4, and B3 has smallest charge resistance between sample and solution. Combined with XPS, the study found that the higher photocatalytic activity origins from large charge transfer interface and built-in electric field (BIEF) around such interface, rathor than light absorption and dark adsorption.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jing Ji,Xianbo Sun,Weiyu He,Yongdi Liu,Jun Duan,Wen Liu,Long D. Nghiem,Qilin Wang,Zhengqing Cai
A new type of solar active carbon-doped Bi 3 O 4 Br catalyst was synthesized by combining hydrothermal and post-thermal treatment. The activity of the material under sunlight and visible light was 3.3 times and 2.7 times that of Bi 3 O 4 Br, respectively. The C-doping on Bi 3 O 4 Br nanosheets increased the built-in electric field strength , thus significantly promoted the migration of charge carriers and enhanced the photocatalytic activity. In addition, replacing Br with C with a smaller atomic radius can shorten the interlayer spacing, which is beneficial to carrier separation. Experiments showed that the doping of C shortened the semiconductor band gap by 9.8% and expanded the absorption range of visible light. Among the photogenerated reactive species, h + played a major role in the degradation of 1-methylpyrene (a typical polycyclic aromatic hydrocarbons), followed by O 2 ∙ - and •OH. Based on intermediate analysis and DFT calculation, we proposed the degradation mechanism and pathways. Quantitative structure–activity relationship (QSAR) analysis showed that some toxic intermediates were produced during the photocatalysis process, but the overall environmental risk was greatly reduced. This work provides new perspective for understanding non-metallic doping in semiconductor photocatalysts to enhance the built-in electric field, and this technology can be extended to other semiconductor materials.
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 Energy Storage
·
2025
·
IF 9.8
Jin-hua Zhang,Peng-jie Zhu,Yan-zhen Liu,Xiang-ru Zhu,Yong-feng Li,Cheng-Meng Chen
The construction of heterostructured energy storage and conversion with special morphology has the potential to be an up-and-coming area of research. In this study, we designed and synthesized a Co₃O₄/g-C₃N₄ heterostructured electrode material with a distinctive morphology using a multistep fabrication approach. The heterojunction formed between Co₃O₄ and g-C₃N₄ induces interfacial charge redistribution, resulting in a built-in electric field that facilitates efficient electron transfer and enhances the electronic structure. Furthermore, the engineered morphology, comprising nanocages and hollow tubes, significantly increases the number of electrochemically active sites. The optimized electrode achieved an impressive specific capacity of 921.8 F g −1 at a current density of 1 A g −1 , along with excellent cycling stability, retaining 82.88 % of its initial capacity after 10,000 cycles. Moreover, an asymmetric supercapacitor constructed with Co₃O₄/g-C₃N₄ as the positive electrode and activated carbon as the negative electrode demonstrated a stable and high energy density of 36.3 Wh kg −1 .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xianbiao Hou,Tengjia Ni,Zhaozheng Zhang,Jian Zhou,Shucong Zhang,Lei Chu,Shuixing Dai,Huanlei Wang,Minghua Huang
Achieving enhanced built-in electric field (BEF) is highly desirable for accelerating charge transfer and boosting catalytic activity towards oxygen evolution reaction (OER) but still remains a huge challenge. Herein, we constructed the heterointerface composed of FeCo 2 S 4 and CoFe-MOF with abundant oxygen vacancies on Ni foam substrate (named as FeCo 2 S 4 @O v -CoFe-MOF/NF). Experimental and theoretical findings proposed that the introduction of abundant oxygen vacancies into the heterointerface could increase the energy level difference of the two components and reduce electron clouds overlap between metal Co/Fe and oxygen for increased BEF. Such enhanced BEF could accelerate the electronic migration for optimizing the d-band center and adsorption/desorption capacity of reaction intermediates. As expected, the target FeCo 2 S 4 @O v -CoFe-MOF/NF with high BEF intensity displayed splendid OER activity and durability in the alkaline and neutral medium. The present work provides precise guidance for designing other advanced catalysts through deliberately manipulating the BEF.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Long Zeng,Lu An,Zhijie Zhang,Jie Zheng,Wenxuan Chen,Chao Liu,Yuying Zheng,Dai Dang,Zhao-Qing Liu
Development of non-noble bifunctional electrocatalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) are of great significance under alkaline electrolytes for overall water splitting. In this work, CoP/FeP has been designed and constructed in situ on carbon fiber paper by using the bimetallic metal organic frameworks (MOFs) synthesis strategy. The heterogeneous CoP/FeP displays excellent catalytic activities in both HER and OER of the fully hydrolyzed semi-reaction. Remarkably, CoP/FeP is applied as the bifunctional electrode in anode and cathode to construct an overall water splitting apparatus, resulting in the low cell voltage and excellent stability. The exceptional electrocatalytic performance may be mainly attributed to the heterogeneous interface, which constructs a built-in electric field to provide electron to Co with electron-rich structure, resulting in the strong adsorption of H and weak adsorption of O 2 on Co. This study provides an effective and controllable method for the design of self-supporting bimetal phosphide catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
An Jiang,Yaofeng Shi,Feng Gao
The oxygen evolution reaction (OER) confronts significant challenges due to its intricate electron transfer mechanism, which leads to slow reaction kinetics and high energy barriers. Traditional catalysts possess drawbacks of cost and scarcity, limiting their applicability on a large scale. In this study, we developed a heterojunction catalyst via a hydrothermal method, in situ growing Fe 2 NiSe 4 on the surface of NiFePBA (NiFePBA/Fe 2 NiSe 4 ). The built-in electric field (BIEF) generated at the NiFePBA/Fe 2 NiSe 4 heterojunction showed improved catalytic activity for OER, where the interface electron transfer was markedly enhanced. By modulating the degree of selenization, the inner BIEF intensity can be finely tuned, by which the lowest charge transfer resistance (R ct ) value (2.38 Ω) was obtained for NiFePBA/Fe 2 NiSe 4 -40. The optimized NiFePBA/Fe 2 NiSe 4 -40 structure demonstrated better electrocatalytic activity in 1 M KOH, achieving high current densities of 10 mA cm -2 and 100 mA cm -2 at low overpotentials of 275 mV and 350 mV, respectively. Additionally, the catalyst exhibited excellent stability and a low Tafel slope of 62.60 mV dec -1 . Our work provides new guidance and strategy for the development of high-performance OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mengmeng Tian,Baiyang Hui,Tengyu Jia,Xinying Chen,Lanlan Li,Xiaofei Yu,Xinghua Zhang,Zunming Lu,Xiaojing Yang
Ammonia borane (NH 3 BH 3 , AB) is considered a promising chemical hydrogen storage material. The development of efficient, stable, and economical catalysts for AB hydrolysis is essential for realizing the hydrogen energy economy. In this study, a series of p-p heterojunction catalysts, labeled M (P/S/Cl)-CuCo 2 O 4 , were fabricated using the high-temperature vapor phase method to achieve anionic interface gradient doping. Due to the differences in electronegativity among the anions P/S/Cl–O, electron-rich and electron-deficient regions are generated at the interface, inducing the formation of local p-p heterojunctions with built-in electric fields (BIEF). The difference in work function (ΔW f ) at the interface enhances the strength of the BIEF. Because of the positive influence of the BIEF on the adsorption of intermediates and interfacial behavior, the catalytic performance of P-CuCo 2 O 4 , characterized by a hydrogen evolution rate (HER) of 1125 mL H2 (g cat ·min) −1 , is significantly higher than that of intrinsic CuCo 2 O 4 , which has an HER of 705 mL H2 (g cat ·min) −1 . Its apparent activation energy of only 32.25 kJ/mol is superior to that of previous non-precious metal catalysts. Density functional theory (DFT) further confirms that the construction and enhancement of the BIEF can reduce the band gap, accelerate electron transfer, regulate the metal d-band center, and enhance the adsorption of AB and H 2 O molecules. This process facilitates the elongation and breakage of the O–H bond length in H 2 O and the B–H bond length in AB, thereby promoting the release of H 2 .
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Chong Ouyang,Xinyao Quan,Zhanglian Hong,Kehan Wang,Zi Ang Chen,Mingjia Zhi
In this work, polyethylene glycol is adopted as the solvent for the synthesis of ZnIn 2 S4 photocatalyst by the solvothermal method . Compared with the pristine ZnIn 2 S 4 synthesized in H 2 O solvent, those ones prepared in the polyethylene glycol solvent possess several unique features that are beneficial for photocatalytic CO 2 reduction, such as the increased Zinc vacancy level, the enlarged band gap, and the enhanced built-in internal electric field . These features allow for better charge separation efficiency, thereby improving the photocatalytic activity . The optimized ZnIn 2 S 4 can achieve a CO yield rate of 20.14 µmol/g/h at the gas-solid interface, which is 8.36 times that of the pristine ZnIn 2 S 4 .
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 Science
·
2024
·
IF 7.6
Yinglei Tao,Tao Wang,Xingyu Yu,Ke Gong,Hao Gong,Haixia Chen,Xiaoli Fan,Aidi Zhang,Xianli Huang,Kun Chang,Jianping He
Li–O2 batteries (LOBs) boast an exceptionally high theoretical energy density; however, the slow kinetics of the oxygen electrode reaction have been a significant hurdle in their advancement and practical application. In this study, a composite of bismuth oxyhalide heterojunction incorporated with metal–organic frameworks (MOFs) was engineered on carbon cloth (Zr-MOF/BiOIBr/CC) as an efficient bifunctional catalyst to enhance the oxygen electrode reaction in photo-assisted LOBs. Compared to Zr-MOF/CC, Zr-MOF/BiOIBr/CC significantly expands the light absorption spectrum of the catalyst. Furthermore, the built-in electric field in the heterojunction aids in the separation and directional movement of photogenerated carriers, thereby expediting the reaction kinetics of LOBs. Consequently, the photo-assisted LOBs with Zr-MOF/BiOIBr/CC as the cathodes display a discharge potential of 3.05 V, a low charge potential of 3.20 V, and an energy efficiency of up to 95.3%, and can sustain an extended cycle life of over 255 cycles. This study underscores the potential application of MOFs/semiconductor heterostructural materials in photo-assisted LOBs and offers insights into the systematic design of photo-assisted air batteries and other advanced semiconductors.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）