INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Xueyan Huang,Hongyan Yu,Gaopan Tang,Shihui Zhang,Wanling Cai,Lu Chen
Photocatalytic water splitting into H 2 is considered an economical and environmentally friendly method for H 2 evolution, and rationally designing a non-noble metal cocatalyst maintains an enormous effect on a photocatalytic system. Herein, with metallic FeP, introducing n-type semiconductor CdIn 2 S 4 induces a rapid charge transfer across the FeP/CdIn 2 S 4 Schottky junction, furthering improved photocatalytic activity. The optimal FeP/CdIn 2 S 4 composite presents an impressive hydrogen evolution rate of 1.28 mmol·g −1 ·h −1 , which was nearly 9.8 times higher than that of CdIn 2 S 4 (0.13 mmol·g −1 ·h −1 ). Quantum efficiency can reach up to 14.5 % at 420 nm. Systematic investigations reveal that FeP can be reserved as a cocatalyst, providing more reactive sites and lower overpotential for hydrogen evolution. This work offers a new strategy for designing and fabricating efficient photocatalytic energy conversion cocatalysts.
研究领域:
材料科学
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能源转换
·
光催化技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Weiqian Cai,Youqun Wang,Linshan Xiong,Yingjie Zheng,Zhibin Zhang,Xiaohong Cao,Yunhai Liu
Cuprous oxide (Cu 2 O), a promising semiconductor material, has been less employed in the photocatalytic removal of uranium. In this work, silver and gold nanoparticles were introduced on the surface of Cu 2 O. HR-TEM, XRD and XPS were applied in characterized the physic-chemical properties of composite. In comparison to Cu 2 O, Au modified Cu 2 O (Au/Cu 2 O-N) demonstrated a significantly enhanced uranium removal rate, reaching 100% within 120 minutes. This represents a 2-fold increase in the uranium removal rate compared to pure Cu 2 O-N. The reason con be interpreted including the red-shift of the absorption band from 600nm-800nm, the formation of Schottky junction between Au and Cu 2 O, the electron traps constructed by Au itself. Consequently, the rate of photogenerated electron-hole complexation is significantly diminished. Free trapping and EPR prove that reactive radicals are O 2 - . This has led to the development of a novel approach, namely the synergistic strategy of noble metal loading and nitrogen-doped cuprous oxide, which has the potential to facilitate the visible light removal of U(VI) from toxic wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yunmeng Cao,Lin Yue,Zaixing Li,Yonghui Han,Jing Lian,Huiping Qin,Shuyan He
In this study, Sn–Bi–MOF/Ti 3 C 2 heterojunction catalysts were prepared using the solvothermal method, and their photocatalytic ability to degrade and mineralize tetracycline (TC) under illumination was investigated. After 90 min of photocatalysis, the pollutant had a degradation efficiency of 96.2% and a mineralization rate of 45.5%. The physicochemical properties of the catalysts were analyzed using various methods. The effects of the solution pH, coexisting anions, and water quality on the catalyst performance were investigated. ·O 2 − and h + are the main active substances in the photocatalytic mechanism, as demonstrated by free-radical quenching experiments and EPR tests. The degradation of TC and the intermediates produced were determined using 3D fluorescence and LC-MS. The photocatalytic mechanism of Sn–Bi–MOF/Ti 3 C 2 was proposed based on free radical determination and electrochemical tests. The formation of the Schottky junction accelerated the transfer of electrons to Ti 3 C 2 and improved the separation of charges, which led to the generation of free radicals. Sn–Bi–MOF/Ti 3 C 2 still exhibited good catalytic ability after four cycles of the experiments, and the XRD patterns before and after the reaction were consistent, which illustrates that the composite structure was stable. Overall, Sn–Bi–MOF/Ti 3 C 2 has promising applications in the photocatalytic removal of refractory pollutants.
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
Materials Today Chemistry
·
2023
·
IF 7.3
S. Gong,W. Lu,W. Zhang,Y. Zhang,T. Gan,H. Hu,Z. Huang
Poor visible light (VSL) absorption capacity and severe photogenerated carrier recombination rate are the two major problems limiting the application of g-C 3 N 4 (CN). In this work, a novel 2D/1D Bi 2 O 2 Se/tubular g-C 3 N 4 (TCN) Schottky junction photocatalyst was prepared by combining 2D Bi 2 O 2 Se with TCN at room temperature. The degradation rate of tetracycline hydrochloride (TCH) catalyzed by 5% Bi 2 O 2 Se/TCN composite was 85.3% within 30 min under VSL illumination, and the degradation kinetic constant reached 0.0570 min −1 , which was 9.6, 3.3, and 21.9 times higher than those of CN (0.0059 min −1 ), TCN (0.0173 min −1 ), and Bi 2 O 2 Se (0.0026 min −1 ), respectively. When 2D Bi 2 O 2 Se was combined with TCN as a cocatalyst, the Schottky junction was formed at the interface, which could efficiently transfer the photogenerated electrons in TCN to Bi 2 O 2 Se for enhancing photocarriers separation. In addition, Bi 2 O 2 Se enhanced the VSL light absorption performance of TCN. The main active species produced by Bi 2 O 2 Se/TCN under VSL illumination were h + and •O 2 − . Based on the results of LC-MS, a new degradation path of TCH catalyzed by Bi 2 O 2 Se/TCN was proposed. Therefore, this work proposed a novel Bi 2 O 2 Se/TCN Schottky junction photocatalyst for highly efficient removal of TCH.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Dongshu Sun,Tianyu Zhou,Guangbo Che,Chunbo Liu
The engineering and synthesis of g-C 3 N 4 -based photocatalysts with high utilization rate of charge carriers and extensive visible light responsive range is pivotal to alleviate the energy crisis. Herein, inosculating P-doped g-C 3 N 4 with NiS (NPCN) via the calcination-solvothermal method to establish 2D/2D Schottky-junction with interfacial P-Ni bond photocatalyst can achieve high-efficiency hydrogen production upon exposure to visible light, the 2-NPCN displays superior photocatalytic H 2 -release ability up to 299.6 μmol in the absence of cocatalysts, which is approximately 53.3 times higher than that of BCN (5.6 μmol). Not only that, the apparent quantum efficiency (AQE) of the reconstructed material is 11.7% at 420 nm. Noticeably enhanced photocatalytic HER activities accrue from the fact that P-doped g-C 3 N 4 can shorten the band gap for widening the visible light responsive range, and the synergistic effect of Schottky-junction and P-Ni chemical bond can increase the separation efficiency of electron-hole pairs and efficiently ameliorating the charge transfer dynamics. Moreover, the 2D/2D structure with large and tight contact interfaces can decrease the charge migration distance. In this work, the 2D/2D NPCN Schottky-junction photocatalyst reasonably designed provides a meaningful case for meeting the requirements for high-efficiency hydrogen production driven by solar energy.
研究领域:
材料科学
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能源化学
✓ 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
Pei Qiu,Yong Zhang,Gang Cheng
Solar-to-hydrogen production has attracted increasing attention since it possesses great potential in alleviating energy and environmental crises to some extent. The key issue is to develop efficient photocatalysts exhibiting superior hydrogen production capability. In this work, Cu@TiO 2 hybrid (Cu nanoparticles encapsulated in TiO 2 ) has been successfully prepared by Cu 2 O self-template reduction through solvothermal treatment in ethylene glycol-water mixed solvent. When octahedral Cu 2 O is involved in the reaction system, the Cu 2 O@Ti-precursor octahedral structure is first formed and subsequently the Cu@TiO 2 hybrid is prepared with the reduction of ethylene glycol (EG). The Cu@TiO 2 hybrid derived with different mass of Cu exhibits improved photocatalytic hydrogen production performance compare to pure TiO 2 and P25. Among those photocatalysts, the Cu@TiO 2 -10% (the copper content is 10 wt%) shows the highest hydrogen evolution rate of 4336.7 μmol g −1 h −1 , and it is twice as much as the pure TiO 2 and 1.9 times as much as P25, respectively. Based on the photo/electrochemical results, an efficient photo-generated electron-hole separation contributes to the enhancement of photocatalytic H 2 evolution upon the Cu@TiO 2 hybrid. When replacing octahedral Cu 2 O with cubic and truncated octahedrons ones, the Cu@TiO 2 hybrid photocatalysts are also obtained and they also display superior solar-to-hydrogen evolution than pure TiO 2 and P25. It is expected this work could develop an approach to design Cu-encapsulated hybrid photocatalysts for hydrogen generation .
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 35
·12602-12609
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IF 8.067
Chen Jia,Hongli Liu,Xiaoyuan Zhang,Shirong Wang,Xianggao Li
Self-powered photodetectors are great potential candidates in the next generation of low energy-consumption photoelectric devices. However, the planar-type metal–semiconductor–metal (MSM) self-powered photodetectors (PDs) of perovskites still suffer from poor photodetection performance. Herein, by taking advantage of the spontaneous polarization property of the CH3NH3PbI3 single crystal, which can generate an extra polarization electric field, planar-type self-powered Au/CH3NH3PbI3/Cu PDs with preferable photodetection capability is reported. The resultant PDs exhibit the maximum responsivity of 0.288 A W−1 in 400–840 nm under the superposed built-in electric field by spontaneous polarization and asymmetric Schottky junction. Furthermore, the maximum detectivity is 4.69 × 1012 Jones, which is the highest record among the planar-type MSM self-powered PDs based on a perovskite. Moreover, the PDs exhibited excellent operation stability with the photocurrent of the unencapsulated photodetector remaining at 92% after 15 days in atmospheric condition.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guanglu Xia,Jianhao Qiu,Shengwang Gong,Dingliang Dai,Biyao Fang,Yixin Li,Jianfeng Yao
Specific intermolecular interactions are the keys to constructing benign interfacial compatibility, which determines the activities of hybrid photocatalysts. In this study, CdS/TpPa-Cl 2 /MXene hybrids were compactly developed through the mediation of chlorine groups in TpPa-Cl 2 with MXenes and CdS. Owing to the formation of the Schottky junction between TpPa-Cl 2 and MXene and the heterojunction between TpPa-Cl 2 and CdS, as well as the close interfacial contacts among them, the photogenerated electron–hole pairs are effectively separated, which ultimately results in efficient photocatalytic activities. For visible-light-driven H 2 O 2 production in ambient air and pure water, CdS/TpPa-Cl 2 /MXene hybrids could achieve a high H 2 O 2 yield of 1005 μmol·L –1 , which is 2.5, 9.7 and 6.5 times greater than those of pure TpPa-Cl 2 , MXene and CdS, respectively. The mechanism investigation revealed that an indirect O 2 reduction pathway with ·O 2 – as an intermediate occurred for H 2 O 2 production over the CdS/TpPa-Cl 2 /MXene composites, and this two-electron O 2 reduction process was manifested as the primary way. This study provides insight into the construction of multi-component composite photocatalysts with high efficiency on the basis of covalent organic frameworks.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 24
·11966-11975
·
IF 11.301
Guixiang Xie,Xiya Yang,Jialong Duan,Yanyan Duan,Qunwei Tang
Triboelectric nanogenerators (TENGs) have attracted growing attention because they are advanced energy conversion devices to efficiently harvest low-frequency mechanical energy from nature. How to increase the permittivity of electrode materials as well as the surface charge density is technically important to improve the output performances of a robust TENG. In this study, an all-inorganic cesium lead bromide (CsPbBr3) perovskite film with semiconducting characteristics is combined with metallic nano-platinum to build bulk Pt/CsPbBr3 Schottky junctions, which are used as triboelectric electrode materials in vertical contact-separation perovskite TENGs. The systematic characterization demonstrates that the electron binding energy and dielectric properties of bulk Pt/CsPbBr3 Schottky junction tailored perovskite films are maximized by optimizing the Pt dosage. An open-circuit voltage of 273 V, a short-circuit current density of 30.3 μA cm−2 and an instantaneous maximum power density of 1295.5 mW m−2 are achieved by the champion Pt/CsPbBr3 TENG at a Pt dosage of 0.5%. A maximum energy storage of 3.96 mJ is stored in a 1 μF capacitor within a 300 s charging period. This work provides new insights into Schottky junction TENGs for enriching the fundamental principles of both halide perovskites and TENGs.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2021
·Vol. 8
·期 13
·2004456
·
IF 16.806
Yang Wang,Wei Zhang,Dan Li,Jianping Guo,Yu Yu,Kejian Ding,Wubiao Duan,Xiyou Li,Heyuan Liu,Pengkun Su,Bo Liu,Jianfeng Li
Manipulation of the co-catalyst plays a vital role in charge separation and reactant activation to enhance the activity of metal-organic framework-based photocatalysts. However, clarifying and controlling co-catalyst related charge transfer process and parameters are still challenging. Herein, three parameters are proposed, V transfer (the electron transfer rate from MOF to co-catalyst), D transfer (the electron transfer distance from MOF to co-catalyst), and V consume (the electron consume rate from co-catalyst to the reactant), related to Pt on UiO-66-NH 2 in a photocatalytic process. These parameters can be controlled by rational manipulation of the co-catalyst via three steps: i) Compositional design by partial substitution of Pt with Pd to form PtPd alloy, ii) location control by encapsulating the PtPd alloy into UiO-66-NH 2 crystals, and iii) facet selection by exposing the encapsulated PtPd alloy (100) facets. As revealed by ultrafast transient absorption spectroscopy and first-principles simulations, the new Schottky junction (PtPd (100)@UiO-66-NH 2 ) with higher V transfer and V consume exhibits enhanced electron-hole separation and H 2 O activation than the traditional Pt/UiO-66-NH 2 junction, thereby leading to a significant enhancement in the photoactivity.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 12
·3571-3580
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IF 4.478
Ye Cui,Xu Fan,Ullah Fateh,Wang Minqiang
Photoelectrochemical (PEC) detection as a potential development strategy for Cu 2+ ion sensor has arisen extensive attention. Herein, CdS/Ti 3 C 2 heterostructure was synthesized by electrostatically driven assembly and hydrothermal method. On the basis of a CdS/Ti 3 C 2 heterostructure, a novel anodic PEC sensing platform was constructed for highly sensitive detection of trace amount of Cu 2+ . Carrier transport at the interface of CdS/Ti 3 C 2 heterostructure was tremendously improved, due to the generation of effective Schottky junctions. Under visible light irradiation, the CdS/Ti 3 C 2 heterostructure-modified PEC platform exhibits great anode photocurrent signal, and the formation of Cu x S reduces the PEC response with the presence of Cu 2+ as a representative analyte. Thus, the linear response of Cu 2+ ranges from 0.1 nM to 10 µM and the limits of detection (LOD, 0.05 nM) are obtained, which is lower than that of WHO’s Guidelines for Drinking-water Quality (30 μM). This idea of component reconstitution provides a new paradigm for the design of advanced PEC sensors. Graphical abstract
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
·
2023
·
IF 6.9
Ze Wang,Zhi Huang,Jiang Yu,Xiao Shao,Weidong Peng,Jie Yu,Yinying Jiang
Formaldehyde is a pollutant that significantly affects the indoor air quality. However, conventional remediation approaches can be challenging to deal with low-concentration formaldehyde in an indoor environment . In this study, Photocatalysts of Ag/graphitic carbon nitride (g-C 3 N 4 )/Ni with 3D reticulated coral structure were prepared by thermal polymerization and liquid phase photo-deposition, using nickel foam (NF) as the carrier. Experiments demonstrated that when the Ag concentration was 3%, and the relative humidity was 60%, the Ni/Ag/g-C 3 N 4 showed the maximum degradation rate of formaldehyde at 90.19% under visible light irradiation, and the formaldehyde concentration after degradation was lower than the Hygienic standard stated by the Chinese Government. The porous structure of Ni/Ag/g-C 3 N 4 and the formation of Schottky junctions promoted the Adsorption efficiency and degradation of formaldehyde, while the nickel foam carrier effectively promoted the desorption of degradation products . Meanwhile, the degradation rate was only reduced by 3.4% after 16 recycles, the three-dimensional porous structure extended the lifetime of the photocatalyst. This study provides a new strategy for the degradation of indoor formaldehyde at low concentrations.
研究领域:
环境科学
·
材料科学
✓ 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）