APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Yue Chang,Kai Yu,Chenxi Zhang,Zequn Yang,Yajun Feng,He Hao,Yuanzhi Jiang,Lan-Lan Lou,Wuzong Zhou,Shuangxi Liu
New ternary composites based on three dimensionally ordered macroporous (3DOM) SrTiO 3 (CdS/Au/3DOM-SrTiO 3 ) were prepared and used as photocatalysts in visible light (λ > 420 nm) photocatalytic water splitting for hydrogen evolution. Through optimizing the pore size of 3DOM-SrTiO 3 materials and the loading amounts of Au and CdS , CdS/Au/3DOM-SrTiO 3 (300), templated by 300 nm sized poly(methyl methacrylate) colloids, was found to exhibit a remarkably enhanced photocatalytic hydrogen evolution rate (2.74 mmol/h⋅g), which was 3.2 times as high as that of CdS/Au/C-SrTiO 3 catalyst based on commercial SrTiO 3 . This notably enhanced photocatalytic performance was mainly attributed to the slow photon enhancement effect of 3DOM-SrTiO 3 (300) material, which significantly promoted the light harvesting efficiency of ternary composite for the slow photon region of 3DOM-SrTiO 3 (300) was well matched with the optical absorption band of photocatalyst. Further depositing Pt nanoparticles on CdS/Au/3DOM-SrTiO 3 (300) composite as a co-catalyst, an extraordinarily high hydrogen evolution rate (up to 5.46 mmol/g⋅h) and apparent quantum efficiency (42.2% at 420 nm) were achieved because of the synergistic effect of efficient carrier separation, Au SPR effect, and slow photon effect. Furthermore, these ternary CdS/Au/3DOM-SrTiO 3 composite photocatalysts were very stable and could be easily recycled four times in visible light photocatalytic water splitting experiments without any loss in activity.
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 CATALYSIS
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2018
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IF 6.759
Kai Yu,Da Lei,Yajun Feng,Haochen Yu,Yue Chang,Yanbing Wang,Yaqi Liu,Gui-Chang Wang,Lan-Lan Lou,Shuangxi Liu,Wuzong Zhou
Investigation of Bi-doping effects on the catalytic performance of Pt/3DOM-Ce 1−x Bi x O 2−δ in the aerobic oxidation of 5-hydroxymethyl-2-furfural allows us to reveal the promoted catalytically active sites: the asymmetrical oxygen vacancies coordinated with one Bi and up to three Ce cations, such as Bi-□(-Ce) 3 , where □ represents an oxygen vacancy, which can easily gain oxygen atoms in favor of the CeO 2 structure, and, when filled with oxygen, easily release oxygen anions in favor of six-coordination for Bi 3+ . The loss of electrons in the reduction of oxygen atoms at these sites would be replenished by electron transfer from Pt nanoparticles , eventually promoting the oxidation potential of the Pt nanoparticles. The present work points out that the promoted catalytic properties in Bi-doped CeO 2 are mainly due to the asymmetric structures of the oxygen vacancies, rather than simply to the number of oxygen vacancies. The newly proposed model of asymmetrical active sites and electron transfer mechanism may shed light on the physicochemical properties of other solid solution substrate-supported metal nanoparticle catalysts.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 66
·53441-53447
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IF 3.84
Jia Ma,Yunlong Ning,Cairong Gong,Gang Xue,Guoliang Fan
Three-dimensionally ordered macroporous (3DOM) SiOC was successfully fabricated on a cordierite monolith inner wall of a polystyrene (PS) sphere template through a colloidal crystal templating (CCT) method (named as 3DOM SiOC/cordierite). And perovskite-type LaCoO3 (LCO) mixed metal oxides, prepared by a facile sol–gel process, were coated onto the wall of the 3DOM SiOC/cordierite by a simple impregnation-sintering approach (named as LCO/3DOM SiOC/cordierite). The morphological and physicochemical properties studies indicate that the 3DOM structure has excellent connectivity, a large specific surface area, and applicable pore size. And the 3DOM structure plays an important role in preventing aggregation of the targeted catalyst particles, improving the contact condition between catalysts and soot as well as enhancing the reducibility of the LCO. The subsequent investigation on the catalytic performance of the 3DOM samples for diesel soot combustion shows that the 3DOM texture offers the catalyst a lower soot combustion temperature than a conventional catalyst, and the LCO/3DOM SiOC/cordierite reduces the combustion temperature even further while avoiding the rise of back-pressure effectively as well.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
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IF 7.305
Hongying Liu,Xiaoping Liang,Tao Jiang,Yuanyang Zhang,Shiwei Liu,Xuezhuang Wang,Xiaowei Fan,Xuguo Huai,Yadong Fu,Zhenbo Geng,Dequan Zhang
Nanoscale V 2 O 5 films possess excellent electrochemical properties and have great potential for application in electrochromic devices. Herein, we report a novel strategy for the transformation of three-dimensionally ordered macroporous(3DOM) V 2 O 5 films into V 2 O 5 nanorods film using a simple low-temperature annealing treatment, in which the heterogeneous nucleation sites provided by PS colloidal sphere surface, the anisotropic bonding of V 2 O 5 , atomic rearrangement, and Ostwald ripening are all important factors affecting the morphological transformation. According to this study, during the preparation of 3DOM V 2 O 5 films, a small number of oxygen vacancies were introduced into the V 2 O 5 lattice, and the annealing treatment (250–400 °C, 4–8 h) controlled the concentration of oxygen vacancies. Compared with the ion storage capacity of V 2 O 5 films prepared by conventional sol-gel dip-coating method (17.79 mC cm −2 for unannealed V 2 O 5 films and 13.90 mC cm −2 for V 2 O 5 films after 6 h of annealing at 350 °C), the 350°C-6h films with nanorod structure had the highest ion-storage performance, the initial value raised to 98.77 mC cm −2 . Further, the cycling stability was excellent, with only a 6.1% decrease after 5000 cycles. This was because of the special nanorod structure and the presence of a certain number of gradient oxygen vacancies in the 350°C-6h film. The 350°C-6h film also had good electrochromic properties, a wide range of transmittance modulation (73.6%), and a fast response time (3.2 s for coloring and 3.9 s for bleaching). In addition, electrochromic devices (ECDs) with 350°C-6h films as both ion-storage layers and electrochromic layers have been successfully assembled, which exhibit high performance.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
高影响因子
ACS Applied Energy Materials
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2023
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IF 6.4
Rui Chen,Ying-Ying Wang,Xia Jiang,Ming-Hao Ji,Hao-Yan Shi,Hai-Long Wang,Yan-Xin Chen,Can-Zhong Lu
This article describes a photocatalytic (PC) hydrogen evolution technology that utilizes Pd/LaCoO3/PCN nanocomposites. In the preparation process, a narrow band gap pure LaCoO3 phase was obtained using a template method, which was subsequently combined with Pd-NPs loaded with pCN to form a Z-scheme heterojunction. The formation of this heterojunction resulted in a material with improved charge transfer characteristics and electron well performance. Under visible light irradiation, the composite material demonstrated a higher PC hydrogen evolution activity, resulting in a H2 yield of 40.2 μmol g–1 h–1. This yield represents a 259 times improvement over pure pCN materials, respectively. Furthermore, in the presence of a sacrificial agent, triethanolamine (TEOA), the production of H2 increased compared to methanol, likely due to the more vital binding ability of the amine-containing pCN to TEOA. Finally, the study found that Pd/LaCoO3/PCN nanocomposites displayed excellent stability and reusability during three continuous cycles. These results suggest that this material may become an efficient and sustainable technology for solar fuel production.
研究领域:
材料科学
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可再生能源
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光催化技术
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产品关联
DOI
高影响因子
Small
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2025
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IF 12.1
Yan Gao,Xiayu Lia,Shuai Huang,Na Zhao,Jianshe Zhao
Three-dimensionally ordered macro-microporous 3DOM-ZIF-8-based peroxophosphotungstate (DIL-PW 4 ) is constructed to break the limitation of micropores inherent in traditional supported catalysts. The presence of ordered macropores expose more active sites and significantly enhance mass diffusion, thereby boosting catalytic activity, especially in reactions involving larger molecules. The prepared composite DIL-PW 4 @3DOM-ZIF-8 is verified by various characterization techniques and used as a catalyst for the extraction oxidation desulfurization of multi-component simulated fuel. The results showed that heterogeneous catalyst DIL-PW 4 @3DOM-ZIF-8 has a remarkable catalytic effect, with 97.03% total sulfides removal in 120 min. In addition, the stability and reusability of the catalyst DIL-PW 4 @3DOM-ZIF-8 are evaluated as important parameters for industrial applications. In addition, a possible mechanism based on experimental studies are proposed.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Yuxiang Deng,Zhenyu Cai,Libo Yang,Zhiyao Wu,Bihong Chen,Chang Gao,Xinyu Yu,Nannan Wang,Xinpeng Wang
3DOM-TiO 2 /CuO S-scheme heterojunction synthesized via hard templating • Removes 99.06% U(VI) in 120 min; capacity of 1751.33 mg/g • Dynamic Cu valence change & O-vacancy evolution restrain charge recombination. • In situ multi-spectra & DFT reveal charge transfer and U(VI) reduction mechanism. Photocatalysis offers a sustainable approach for uranium-containing wastewater remediation, yet conventional materials still suffer from limited solar-light utilization and rapid charge recombination. Herein, a three-dimensional ordered macroporous TiO 2 /CuO composite (3DOM-TC) was synthesized using resorcinol–formaldehyde resin spheres as a hard template. The ordered macroporous TiO 2 framework enables slow-photon-assisted light harvesting and multiple light scattering, while CuO coupling broadens the light-response range and constructs an S-scheme TiO 2 /CuO heterojunction to promote directional charge separation. Meanwhile, oxygen vacancies mainly serve as electron-trapping and O 2 /intermediate adsorption–activation sites, which are coupled with the dynamic Cu 2+ /Cu + variation during photocatalysis. As a result, 3DOM-TC achieves 99.06% U(VI) removal within 120 min, corresponding to a maximum extraction capacity of 1751.33 mg/g. Photoelectrochemical tests confirm enhanced photocurrent density and efficient interfacial charge transport compared with pristine TiO 2 . In situ EPR, XPS, and DFT calculations reveal the photoinduced charge-transfer pathway and illumination-enhanced oxygen-vacancy signals. Moreover, in situ FTIR spectroscopy confirms that photogenerated ·O 2 − can further convert to H 2 O 2 -related species, thereby promoting U(VI) precipitation as (UO 2 )O 2 ·4H 2 O. This work highlights the synergistic integration of 3DOM-enabled light harvesting, S-scheme charge separation, and vacancy-assisted electron transfer and O 2 activation, providing a promising strategy for efficient photocatalytic U(VI) sequestration. Download: Download high-res image (232KB) Download: Download full-size image
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Yana Liu,Yu Zhu,Qinke Tang,Xinkang Shen,Yunfeng Zhu,Jiguang Zhang,Jun Wang,Zhixin Ba,Wenrong Cai,Yuting Huang,Xiaohui Hu
(3DOM) LaNiO 3 catalysts were successfully synthesized and significantly improved the hydrogen storage kinetics of MgH 2 . MgH 2 -5 wt% 3DOM LaNiO 3 can rapidly absorb 5.91 wt% H 2 at 175 °C within 500 s and desorb 6.37 wt% H 2 within 500 s at 300 °C, its hydrogen absorption and desorption rates are 10 and 11 times higher than MgH 2 -5 wt% Nano LaNiO 3 , respectively. This remarkable enhancement is primarily due to its unique 3DOM structure and the synergistic effect of highly dispersed LaH 3 and Mg 2 Ni/Mg 2 NiH 4 formed in situ during the ball milling and first de/re-hydrogenation process. 3DOM structure catalysts are fragile which can make the catalyst distribution more uniform during ball milling process, giving rise to the significantly improved catalytic activity. The theoretical calculation results show that Mg 2 Ni/LaH 3 heterostructure can greatly reduce the hydrogen adsorption energy to −0.768 eV and the heterogeneous interface induces the charge redistribution between Mg 2 Ni and LaH 3 , resulting in a small amount of negative charge accumulating on the surface of Mg 2 Ni. Moreover, highly dispersed LaH 3 and Mg 2 Ni/Mg 2 NiH 4 in the MgH 2 matrix create a multiphase interface, which can provide more active sites and a variety of pathways for hydrogen diffusion. Above reasons contribute to the excellent synergistic catalytic performance of in situ formed LaH 3 and Mg 2 Ni/Mg 2 NiH 4 on MgH 2 . These discoveries hold scientific value for the design and preparation of highly active catalysts using 3DOM materials for hydrogen storage in light-metal hydrides, especially in MgH 2 .
研究领域:
材料科学
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能源化学
·
物理化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Penghui Du,Kexin Tang,Biwei Yang,Xiaohan Mo,Junjian Wang
Measuring the quantum yield and reactivity of triplet-state dissolved organic matter (3DOM*) is essential for assessing the impact of DOM on aquatic photochemical processes. However, current 3DOM* quantification methods require multiple fitting steps and rely on steady-state approximations under stringent application criteria, which may introduce certain inaccuracies in the estimation of DOM photoreactivity parameters. Here, we developed a global kinetic model to simulate the reaction kinetics of the hv/DOM system using four DOM types and 2,4,6-trimethylphenol as the probe for 3DOM*. Analyses of residuals and the root-mean-square error validated the exceptional precision of the new model compared to conventional methods. 3DOM* in the global kinetic model consistently displayed a lower quantum yield and higher reactivity than those in local regression models, indicating that the generation and reactivity of 3DOM* have often been overestimated and underestimated, respectively. The global kinetic model derives parameters by simultaneously fitting probe degradation kinetics under different conditions and considers the temporally increasing concentrations of the involved reactive species. It minimizes error propagation and offers insights into the interactions of different species, thereby providing advantages in accuracy, robustness, and interpretability. This study significantly advances the understanding of 3DOM* behavior and provides a valuable kinetic model for aquatic photochemistry research.
研究领域:
环境科学
·
光化学
·
水化学
·
动力学建模
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DOI
PubMed
高影响因子
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