COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Zhiqiang Liu,Jiang Wu,Jianmin Wang,Run Wang,Guolong Liu,Yongfeng Qi,Weixin Xu,Guangqian Luo,Minghou Xu
The morphology of the catalyst is one of the important factors affecting the photocatalytic activity. In this work, fluoride-mediated TiO 2 with different morphologies was successfully prepared based on Ostwald ripening. In particular, the morphology and structure of the TiO 2 sample can be adjusted according to different ionic environments. Combining experiments and characterization, the regulation mechanism of different fluorides on the morphology and structure of TiO 2 was proposed, and the transport behavior of photogenerated carriers was evaluated. The results show that the morphology and structure have a greater impact on the photocatalytic activity of TiO 2 . The hollow structure can promote the separation and transfer of carrier and enhance the light collection ability. The surface fluoride as an electron trap can reduce the carrier recombination rate, which is beneficial to the photocatalytic activity of the as-prepared sample. The hollow structure sample shows a good photocatalytic efficiency in the photocatalytic removal of Hg 0 in the gas phase, reaching about twice the commercial P25. Finally, the photocatalytic mechanism of the catalyst and the electron-hole migration path are proposed. This research provides new ideas for the design of hollow TiO 2 microspheres, which can be widely used in the field of catalysis.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 6
·3017-3025
·
IF 3.925
Wen-Feng Wang,Li-Qi Qiu,Kai-Hong Chen,Hong-Ru Li,Lie-Feng Feng,Liang-Nian He
Photocatalytic CO2 reduction to valuable chemicals, especially fuels, is considered as a promising strategy to mitigate CO2 accumulation and tackle the energy crisis, among which photocatalysis is vital to achieve efficient and selective reduction of CO2. In this work, phosphorus-doped hollow polygonal g-C3N4 rods were prepared through phosphoric acid assisted self-assembly under hydrothermal conditions and subsequent thermal polymerization using phosphoric acid as the phosphorus source and melamine as the nitrogen-rich precursor. The resulting phosphorus-doped hollow polygonal g-C3N4 rods feature increased specific surface area, visible light absorption and photogenerated carrier separation and transfer efficiency according to the structure and photoelectric properties characterization. Coupled with an earth abundant metal-based complex, i.e. [Co(bpy)3]Cl2, as a co-catalyst, the phosphorus-doped hollow polygonal g-C3N4 rods deliver a CO evolution rate of up to 447.5 μmol g−1 h−1 with a selectivity of ca. 96%, being much higher compared to the pristine g-C3N4 (67.01 μmol g−1 h−1 with a selectivity of ca. 94%) resulting from the improved light harvesting and charge transfer to the co-catalyst. Remarkably, the phosphorus-doped hollow polygonal g-C3N4 rods can be reused 6 times while retaining constant catalytic activity in the photoreduction reaction. This work presents new insights into photocatalytic CO2 reduction by developing non-metal doping and hollow structural designs for semiconductor photocatalysts.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xiaohong Ma,Jiajia Zheng,Huacheng Jin,Xi Zeng,Danyang Li,Feifei You,Jian Qi,Fangli Yuan
The utilization of solar energy to convert CO 2 into small energy molecules is a potential “carbon neutral” technology for CO 2 emission reduction. However, the industrial application is significantly constrained due to the low reduction efficiency, complexity of the synthesis methods, and limitations in scaling up the catalyst materials. In this work, we have successfully designed and synthesized a series of hollow tubular ZnO@ZnS core-sheath heterostructured materials, by combining radio-frequency thermal plasma and hydrothermal treatment technologies. The S:Zn molar ratio, reaction time, and temperature were systematically investigated, and the morphology of intermediate products was successfully captured, which provided conclusive evidence for the proposed formation mechanism. Notably, the photocatalytic CO yield of the ZS 0.5 O hollow nanotube core-sheath composite is not only 3.20 or 4.03 times higher than that of the pure ZnO or ZnS, respectively, but also possesses excellent stability. By in-depth characterization, we found that the hollow core-sheath heterostructure enhances light capture and absorption, exposes more effective active sites, and builds a type-II heterojunction between ZnO and ZnS to enhance the separation efficiency of charge carriers. The synergy of these factors significantly improves the catalytic performance, offering new insights for photocatalytic, electrocatalytic, and photoelectrocatalytic CO 2 reduction.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Fan Xie,Qiaoling Liu,Xiyi Dai,Haitao Wei,Zhaoqing Lu
Multi-functional electromagnetic interference (EMI) shielding materials are crucial for advanced electronic devices, requiring low thickness, exceptional shielding performance, and stability, especially in extreme conditions. In this study, the hollow sandwich MXene/h-AgNWs/ANF (AMAgMA) composite films were fabricated via template sacrificing method and layer-by-layer vacuum assisted filtration. Specifically, the hollow MXene was created using PMMA as the template, together with AgNWs for the conductive layer, while ANF provided stability and high temperature resistance as the protective layer. The optimized EMI shielding efficiency (SE) reached 88.2 dB for a film thickness of 93 μm, with an SSE/t value of 18160 dB cm 2 ·g −1 , which was attributed to the hollow structure and continuous double conductive network design. Remarkably, EMI SE of the films maintained even after 70 days of exposure to oxidation, acid, alkali, salt, and ultrasonic treatment thanks to the sandwich design. Additionally, the composite films displayed excellent heat transfer and thermal stability (530 °C), alongside notable flame retardancy and self-extinguishing properties. The superior EMI shielding performance and stability in extreme environments suggest a promising application potential in advanced electronics.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2021
·Vol. 329
·期 2
·1011-1017
·
IF 1.371
Ma Yu,Dou Weixin,Yang Weiting,Yang Weikang,Pan Qinhe
Recently, highly porous metal–organic frameworks (MOFs), with excellent porosity and abundant functional groups, have represented a new addition to the area of capturing uranium ion pollutants. To achieve high adsorption capacity and removal efficiency of uranium, it is significant to modify the morphology of MOF-based adsorbents. In this contribution, two hollow structured ZIF-8 adsorbents were used for the adsorptive separation of uranium from aqueous solution. Both of them showed faster adsorption rate and larger adsorption capacity than pristine ZIF-8, providing the prospect of hollow MOF materials to the application of uranium extraction.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Tian-Long Xi,Li-jun Liu,Qi Liu,Hong-Wei Wang,Lu-Yang Zuo,Hui-Tao Fan,Bo Li,Li-Ya Wang
Semiconductor materials have become the primary photocatalysts for photocatalytic hydrogen production. However, the design and synthesis of effective photocatalytic materials with excellent electron/hole separation efficiency, fast charge transfer, and low carrier recombination rate still face great challenge. Herein, hollow p-n heterojunction MoS 2 @ZnIn 2 S 4 nanoboxes are synthesized for the first time by growing n-type ZnIn 2 S 4 (ZIS) two-dimensional nanosheets on the surface of p-type hollow MoS 2 nanoboxes (MSNBs), which exhibits obvious photocatalytic activity. Among them, 5% MSNBs@ZIS photocatalyst shows the highest hydrogen production efficiency of 22.25 mmol h -1 g -1 , which is 7.3 times that of pure ZIS. The high photocatalytic hydrogen production efficiency of 5% MSNBs@ZIS can be attributed to the formation of hollow structure and p-n heterojunction, which can provide a large number of catalytic active sites, large surface area, and can effectively promote the separation of photogenerated carriers, respectively.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Qianqian Ba,Xinjia Jia,Li Huang,Xiying Li,Li Gao,Liqun Mao
PtNi x hollow nanoparticles (HNPs) as a cocatalyst was synthesized by a galvanic replacement method at room temperature , and then was loaded on CdS. The hollow structure of PtNi x alloy was confirmed by TEM and STEM . Photocatalytic hydrogen production reaction was performed for PtNi x /CdS catalyst under 300 W Xe lamp (λ ≥ 420 nm). It is noteworthy that PtNi 0.5 /CdS shows the highest hydrogen evolution activity of 2.9 mmol/h with QE = 51.24% at 420 nm, which is higher than that of situ-photodeposited Pt onto CdS (0.57 mmol/h). The enhancement of hydrogen evolution performance of PtNi 0.5 /CdS could be attributed to the porous shell and hollow structure of PtNi 0.5 NPs, as well as the strong electronic coupling effect between Pt and Ni. Besides, the sheet structure of CdS in some degree promoted the hydrogen production rate. Therefore, the PtNi x HNPs could be a promising cocatalyst of CdS for solar driven hydrogen evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2015
·
IF 2.752
Mei Lei,Wei Wu,Lingling Sun,Qingyong Tian,Changzhong Jiang,Xiangheng Xiao
According to relative energy band positions between noble metals of Au, Ag, and wide bandgap semiconductor SnO 2 , Au, and Ag nanoparticles (NPs) modified hollow SnO 2 NPs were designed. Firstly, the hollow SnO 2 NPs have been synthesized by employing the silica template-assisted hydrothermal methods, then Au and Ag were coated on the surface of SnO 2 to form the core–shell structures, respectively. The morphology, composition, and optical properties of as-prepared samples have been investigated by various analytic methods. Subsequently, the photocatalytic reaction to Rhodamine B (RhB) dye under simulated-sunlight irradiation was employed to investigate their photocatalytic performance, the results demonstrate the metal–semiconductor with direct Schottky contact exhibited remarkable photocatalytic activity . The finite difference time domain (FDTD) calculation results illustrate the introduced and decorated Au and Ag NPs could enhance the harvesting abilities for visible light. We envision the aforementioned synthesized strategy and catalytic results are used to the designing and application of other metal–semiconductor system.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2017
·Vol. 13
·期 47
·1701993
·
IF 8.643
Yong Cheng,Qian Li,Chunli Wang,Lianshan Sun,Zheng Yi,Limin Wang
Due to the high theoretical capacity as high as 1494 mAh g −1 , SnO 2 is considered as a potential anode material for high-capacity lithium–ion batteries (LIBs). Therefore, the simple but effective method focused on fabrication of SnO 2 is imperative. To meet this, a facile and efficient strategy to fabricate core–shell structured C/SnO 2 hollow spheres by a solvothermal method is reported. Herein, the solid and hollow structure as well as the carbon content can be controlled. Very importantly, high-yield C/SnO 2 spheres can be produced by this method, which suggest potential business applications in LIBs field. Owing to the dual buffer effect of the carbon layer and hollow structures, the core–shell structured C/SnO 2 hollow spheres deliver a high reversible discharge capacity of 1007 mAh g −1 at a current density of 100 mA g −1 after 300 cycles and a superior discharge capacity of 915 mAh g −1 at 500 mA g −1 after 500 cycles. Even at a high current density of 1 and 2 A g −1 , the core–shell structured C/SnO 2 hollow spheres electrode still exhibits excellent discharge capacity in the long life cycles. Consideration of the superior performance and high yield, the core–shell structured C/SnO 2 hollow spheres are of great interest for the next-generation LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zixuan Wang,Yonglong Wang,Juping Wang,Weiping Xiao,Guangrui Xu,Zhenjiang Li,Chunlong Dai,Huadong Zhang,Zexing Wu,Lei Wang
Designing highly efficient catalysts act as a key role for the green and sustainable hydrogen production through water electrolysis. In this work, hollow structured B-doped FeP nanospheres supported Ru (Ru/h-B-Fe-P) is developed by low temperature phosphorization, acid etching and following microwave treatment approach. The hollow structure, abundant defects and electronic interactions between Ru and FeP can favour the mass transport and boosting the reaction kinetics toward all-pH hydrogen evolution reaction (HER). Then, Ru/h-B-Fe-P achieves excellent catalytic activities in acidic, neutral, alkaline, and alkaline seawater electrolytes with only 56 mV, 79 mV, 88 mV and 99 mV to drive 10 mA cm −2 with remarkable stability. This work indicates that decorated noble metals onto specific nanostructured matrix is a promising approach to enhance the catalytic activities.
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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Lijun Liu,Luyang Zuo,Rui Li,Tianlong Xi,Huitao Fan,Bo Li,Liya Wang
Semiconductor photocatalytic hydrogen evolution (PHE) is used to convert solar energy to hydrogen energy. Therefore, a low-cost, effective, and dependable photocatalyst could be a viable solution to environmental and energy crises. However, performing energy-conversion reactions by preparing photocatalysts with suitable photoabsorption and effective charge separation is challenging. Herein, a novel CoMn 2 O 4 -ZnIn 2 S 4 (CMO-ZIS) hollow microcube composite catalyst with a p-n heterojunction is constructed, in which ZnIn 2 S 4 nanosheets are grown in situ on the surfaces of CoMn 2 O 4 hollow microcubes. Surprisingly, 10% CoMn 2 O 4 -ZnIn 2 S 4 (CMO-ZIS-10) exhibits a PHE rate of up to 11.04 mmol h −1 g −1 , which is approximately 3.6 times higher than that of pure ZnIn 2 S 4 . In addition, to maintain the excellent visible light absorption efficiency of ZnIn 2 S 4 nanosheets, the close-contact heterogeneous interface of CMO-ZIS enables easy separation and transfer of the carriers. Furthermore, the hollow structure increases the absorption efficiency of sunlight and provides more active sites, thus increasing the reactivity of photocatalyst. In this paper, we report a workable approach for building heterojunction photocatalysts powered by water splitting.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Wenhao Liao,Qinghua Yang,Haiben Jiang,Pengwei Liu
Silver (Ag) and phosphorus (P) doping have been demonstrated to optimize electron density, enhance conductivity, and accelerate electron transfer. Moreover, construction of hollow structures can expose more active sites, significantly improving the performance of catalysts. Therefore, developing P/Ag-doped hollow structures for water splitting is highly promising and meaningful. However, similar studies remain rarely reported. In this work, we designed and synthesized a P-doped Ag 3 [Co(CN) 6 ] hollow cuboid, named as P/Ag@AgCo PBA, aiming to develop an efficient and high-performance water splitting catalyst. Benefiting from its hollow structure and P/Ag co-doping, the optimized P/Ag@AgCo PBA-1 exhibited outstanding catalytic activity. • In the hydrogen evolution reaction (HER), it achieved a current density of 10 mA cm −2 at a low overpotential (η 10 ) of 117 mV with a Tafel slope of 43.6 mV dec −1 . • In the oxygen evolution reaction (OER), the η 10 was 253 mV, and the Tafel slope was 65.3 mV dec −1 . • In the hydrogen evolution reaction (HER), it achieved a current density of 10 mA cm −2 at a low overpotential (η 10 ) of 117 mV with a Tafel slope of 43.6 mV dec −1 . • In the oxygen evolution reaction (OER), the η 10 was 253 mV, and the Tafel slope was 65.3 mV dec −1 . Owing to its excellent HER and OER performance, when employed as both the cathode and anode in overall water splitting, the catalyst required only 1.66 V to reach a current density of 10 mA cm −2 . Furthermore, it demonstrated remarkable catalytic stability over 24 h of continuous operation. We believe this facile and effective etching and heteroatom co-doping strategy offers new opportunities for the development of similar high-performance water splitting 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
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