AICHE JOURNAL
·
2023
·Vol. 69
·期 8
·e18105
·
IF 3.7
Mide Luo,Zong Lu,Yali Zhao,Yufei Wang,Yanying Wei,Haihui Wang
Accurately constructing membranes based on two-dimensional (2D) materials on commercial porous substrates remains a significant challenge for H 2 purification. In this work, a series of tubular 2D MXene membranes are prepared on commercial porous stainless steel substrates via fast electrophoretic deposition. Compared with other methods, such as filtration or drop coating, and so on. such preparation route shows the advantages of simple operation, high efficiency for membrane assembly (within 5 min) with attractive reproducibility, and ease for scale-up. The tubular MXene membranes present excellent gas separation performance with hydrogen permeance of 1290 GPU and H 2 /CO 2 selectivity of 55. Furthermore, the membrane displays extremely stable performance during the long-term test for more than 1250 h, and about 93% of the membranes from one batch have exceeded the DOE target for CO 2 capture. Most importantly, this work provides valuable referential significance for other 2D materials-based membranes for future application development.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2018
·
IF 3.767
Bin Jia,Hong Lian,Tijian Sun,Hongen Guo,Xiaozhe Cheng,Jian Wu,Yi Chen,Qingchen Dong,Jinhai Huang
Two host materials H1 and H2 by introducing dibenzothiophene and dibezofuran moieties into the carbazole and pyridine derivative, respectively, are reported. Their structural and physical properties were fully characterized. The thermal analysis demonstrated that both H1 and H2 are thermally stable. The triplet energy levels of H1 and H2 were determined to be 2.66 and 2.51 eV, respectively. Green phosphorescent OLEDs with H1 and H2 acting as host materials were fabricated to investigate their performances in PHOLEDs . Green PHOLED based on H1 shows the best performance with the maximum power efficiency of 50.4 lm/W and the lowest driving voltage of 2.5 eV. The characteristic measurements of OLED devices reveal that both H1 and H2 are promising host materials for practical application. By comparing with the commercial host material of 4,4′-bis(carbazol-9-yl)biphenyl (CBP), the power efficiency of green PHOLED was enhanced by 31.6%.
研究领域:
材料科学
·
有机电子学
·
光电材料
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Qun Li,Tareque Odoom-Wubah,Yaping Zhou,Rafal Mulka,Yanmei Zheng,Jiale Huang,Daohua Sun,Qingbiao Li
The search for efficient and durable catalysts for volatile organic compounds oxidation is essential for environmental remediation. Herein, porous coral-like cobalt–manganese oxide (CoMnOx) catalyst was synthesized through annealing Co–Mn–1,3-propanediol precursors at 300 °C in air and applied for the catalytic oxidation of benzene. The as-prepared CoMnOx exhibited uniform porous coral-like structure, with an improved benzene catalytic abatement performance as compared to those of Mn3O4 and Co3O4 samples prepared by the same method, respectively. According to BET, H2-TPR, O2-TPD, and XPS analysis, the as-obtained CoMnOx catalyst showed the highest BET surface area, better low-reducibility temperature, and high content of absorbed oxygen groups when compared to Mn3O4 and Co3O4, which makes significant contribution to its catalytic benzene oxidation activity. Moreover, a plausible surface reaction mechanism for benzene oxidation over CoMnOx catalyst was also proposed through the in situ DRIFTS study.
研究领域:
环境科学
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2019
·
IF 3.674
Li-Li Chu
2D-3D noble-metal-free Ni 2 P/Zn 3 In 2 S 6 hierarchical composites were fabricated firstly by the hydrothermal method and characterized by the relative techniques. The average H 2 evolution rate over the optimized Ni 2 P/Zn 3 In 2 S 6 under simulated sunlight can reach up to 6.4 mmol g −1 h −1 , which is about 3.4 and 2.6 times higher than that of pure Zn 3 In 2 S 6 and Pt/Zn 3 In 2 S 6 hybrid. The excellent photocatalytic performance can be attributed to the interaction between the well-dispersed ultrafine Ni 2 P cocatalyst and the 2D-3D Zn 3 In 2 S 6 hierarchical structure, which contributes to the separation and transportation of the photoinduced charge carriers.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yunxia Luo,Yongping Luo,Chao Liu,Wenzhen Qin,Yuhua Dai,Yu Xie,Xiu Wang,Jiansheng Zhang
Plumbing and devising photocatalysts for high photocatalytic hydrogen production is still a major challenge. In this study, the NiAl-LDH/Mn 0.5 Cd 0.5 S heterostructure composites are prepared by hydrothermal method. When the loading weight of NiAl-LDH is 20 wt%, NiAl-LDH/Mn 0.5 Cd 0. 5S composites has the excellent ability to separate photogenerated charge carriers under visible light. Meantime, the NiAl-LDH/Mn 0.5 Cd 0.5 S composites possess prominent photocatalytic hydrogen production rates of 55.9 mmol·h −1 ·g −1 , which is 7.5 times of pure Mn 0.5 Cd 0.5 S and 25 times of NiAl-LDH. According to the data, the photocatalytic mechanism of electron-holes movement over NiAl-LDH/Mn 0.5 Cd 0.5 S composites is unlocked. This work offers a reference for designing novel heterojunction for photocatalytic production of H 2 .
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
G. Wei,F. Niu,Z. Wang,X. Liu,S. Feng,K. Hu,X. Gong,J. Hua
Polymer heterojunctions have emerged as promising photocatalysts for the photocatalytic hydrogen evolution . However, they are usually used in the form of suspended powder due to the low solubility and lack of anchoring groups to hybridize with inorganic semiconductor oxides . Yet polymer film heterojunctions with convenient separation and recycling potential are more suitable for large-scale water splitting. Herein, a new solution-processable polymer PDBCOOH with biphenyl as the electron donor and diketopyrrolopyrrole (DPP) containing carboxyl group as the electron acceptor has been designed and synthesized. Surface anchoring of PDBCOOH to TiO 2 films through covalent bonding formed polymer-TiO 2 film heterojunctions that achieved a recorded photocatalytic H 2 production rate of 11.9 mmol/m 2 /h without Pt co-catalyst and was 88.8 times higher than that of pristine TiO 2 film. Transient absorption spectroscopy confirms ultrafast polymer excited state electron injection into TiO 2 , long-lived charge separated state, and unity yield of polymer hole regeneration. Photoelectrochemical experiments combined with density functional theory calculation further demonstrate that polymer PDBCOOH /TiO 2 film heterojunctions not only accelerate the charge transfer but also significantly improve the hydrogen evolution rate and stability of the photocatalysts. This work offers a new strategy for obtaining stable and efficient photocatalysts by using the covalent anchoring strategy of polymer/TiO 2 film heterojunction.
研究领域:
材料科学
·
光催化
·
能量转换
✓ 已验证
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 4
·882-891
·
IF 3.552
Fan Yiyi,Li Jinyong,Wang Saidi,Meng Xiuxia,Jin Yun,Yang Naitao,Meng Bo,Li Jiaquan,Liu Shaomin
Hydrogen fuel has been embraced as a potential long-term solution to the growing demand for clean energy. A membrane-assisted separation is promising in producing high-purity H 2 . Molecular sieving membranes (MSMs) are endowed with high gas selectivity and permeability because their well-defined micropores can facilitate molecular exclusion, diffusion, and adsorption. In this work, MXene nanosheets intercalated with Ni 2+ were assembled to form an MSM supported on Al 2 O 3 hollow fiber via a vacuum-assisted filtration and drying process. The prepared membranes showed excellent H 2 /CO 2 mixture separation performance at room temperature. Separation factor reached 615 with a hydrogen permeance of 8.35 × 10 −8 mol·m −2 ·s −1 ·Pa −1 . Compared with the original Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes, the permeation of hydrogen through the Ni 2+ -Ti 3 C 2 T x /Al 2 O 3 membrane was considerably increased, stemming from the strong interaction between the negatively charged MXene nanosheets and Ni 2+ . The interlayer spacing of MSMs was tuned by Ni 2+ . During 200-hour testing, the resultant membrane maintained an excellent gas separation without any substantial performance decline. Our results indicate that the Ni 2+ tailored Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes can inspire promising industrial applications.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Wang Xin,Liu Boyan,Ma Siqing,Zhang Yingjuan,Wang Lianzhou,Zhu Gangqiang,Huang Wei,Wang Songcan
Amorphous semiconductors without perfect crystalline lattice structures are usually considered to be unfavorable for photocatalysis due to the presence of enriched trap states and defects. Here we demonstrate that breaking long-range atomic order in an amorphous ZnCdS photocatalyst can induce dipole moments and generate strong electric fields within the particles which facilitates charge separation and transfer. Loading 1 wt.% of low-cost Co-MoS x cocatalysts to the ZnCdS material increases the H 2 evolution rate to 70.13 mmol g −1 h −1 , which is over 5 times higher than its crystalline counterpart and is stable over the long-term up to 160 h. A flexible 20 cm × 20 cm Co-MoS x /ZnCdS film is prepared by a facile blade-coating technique and can generate numerous observable H 2 bubbles under natural sunlight, exhibiting potential for scale-up solar H 2 production.
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
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
·
2025
·
IF 4.2
Shanshan Liu,Dongxu Huang,Yong Pan,Zhenhua Wang,Juncheng Jiang
This study employs laser schlieren imaging and pressure measurement techniques to investigate the impact of kaoline (Ko) on the explosion behavior of CH 4 /H 2 mixtures at various equivalence ratios (0.8, 1.0 and 1.2) and H 2 contents (0, 0.3 and 0.9). Results indicate that the inhibitory effect of Ko first increases and then decreases with increasing concentration, achieving optimal suppression at 175 g/m 3 . Under the same equivalent ratios ( φ ), the reduction in maximum explosion pressure ( P max ) becomes more pronounced with higher H 2 addition ( R ). At constant R but varying φ , the suppression effect exhibits a different trend: when R =0 and 0.3, optimal suppression occurs at φ =0.8. Whereas at R =0.9, the optimal suppression effect is observed at φ =1.0, corresponding to a 30.27% reduction in P max . As the Ko concentration increases, dust enhances flow field instability, thereby accelerating the transformation of the flame structure. Meanwhile, higher hydrogen addition ( R ) intensifies chemiluminescence, and heated Ko particles to emit strong intense thermal radiation. The combined effect of these two factors causes the flame to appear bright white-yellow. A coupled analysis of flame propagation and pressure evolution reveals that, despite differences in φ , the coupled evolution of flame and pressure remains highly similar under the same R . The main distinctions arise in the timing of critical flame development stage and flame brightness. Overall, Ko suppresses explosions primarily through physical mechanisms such as endothermic cooling, dilution and isolation effects, and thermal radiation shielding, and it exhibits particularly strong suppression at high H 2 additions.
研究领域:
燃烧工程
·
爆炸安全
·
能源科学
·
火灾与危害防护
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongjun Dong,Hansong Cheng,Yun Wang,Zuoyi Liu,Deping Wang,Liqiu Zhang,Yangyang Yu,Chunmei Li
It is a recognized challenge that the elaborate design of metal-organic framework (MOF) derived architecture with tunable electronic structure to achieve efficient catalytic capacity, especially involving in multiatomic catalytic sites. Herein, employing electrochemical reconstruction of Rh-doped Co-BTC MOF, a new catalyst with a unique dual-modified architecture of surface decoration of Rh quantum dots (QDs) and lattice doping of Rh atoms, Rh QD /Rh-CoC 2 O 4 , is fabricated. The key Co-H* and Rh-H* intermediates are detected by in situ shell-isolated nanoparticle enhanced Raman spectroscopy (SHINERS), confirming that the Rh/Co diatomic catalytic sites are created in the Rh QD /Rh-CoC 2 O 4 catalyst. Density functional theory (DFT) calculations further uncover that this unique dual-modified architecture synergistically regulates electronic structure such as electron transfer capacity, d-band center and interfacial electron distribution, which enables the Rh and Co atoms in the Rh-doped lattice matrix of CoC 2 O 4 at the interface with Rh QDs to be effectively triggered, thereby reducing the energy barrier of the hydrogen generation reaction (HER). As a result, the overpotential of the optimal Rh QD /Rh-CoC 2 O 4 -3 catalyst is only 16.5 mV at the current density of 10 mA cm −2 in acidic medium, well below that of the Pt/C benchmark (31.0 mV) and the recently reported Rh-based catalysts. Moreover, it can remain stable operation for more than 120 h without attenuation. This contribution emphasizes the significance of MOF reconstruction in electrocatalytic reactions and sheds a new light on the synergistic regulating effect of MOF-derived catalysts with complex architecture.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Lei Zuo,Ning Yang,Weiwei Xia,Xianghua Zeng,Rongxing Cao
Due to exceptional photocatalytic hydrogen evolution properties, ZnCdS is considered as a promising strategy to enhance the photocatalytic hydrogen evolution performance of ZnCdS with introducing sulfur vacancy or constructing heterostructures. Here, sulfur vacancy-rich ZnCdS nanoparticles were synthesized via a straightforward co-precipitation method followed by a high-temperature annealing treatment. Then NiS@ZnCdS composites were prepared with the hydrothermal method after mixed the precursors of Ni(Ac) 2 ·2H 2 O and CH 4 N 2 S with the prepared Zn 0.5 Cd 0.5 S powders. Thereafter, the prepared samples were used as photocatalysts for hydrogen production. The results showed that the optimized NiS@ZnCdS heterostructures has a photocatalytic hydrogen production rate of 42 mmol · g −1 ·h −1 , which is 14 times higher than that of the ZnCdS sample without annealing treatment. The mechanism behind has been analyzed. A staggered band energy alignment between NiS and ZnCdS was constructed from the measurements of ultraviolet photoelectron spectroscopy (UPS) and XPS spectra, and a z-scheme charge transfer mode was proposed between NiS and ZnCdS with an assistance of electron spin resonance (ESR) signals of •O 2 − . The z-scheme heterostructure between NiS and ZnCdS can enhance the separation of photogenerated electron-hole pairs and increase the photocatalytic activity. The studies will be helpful to construct the NiS related heterostructure.
研究领域:
材料科学
·
能源化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Guangxia Wang,Wenhui Wang,Xiuwei Sun,Liwen Zhou,Yongming Sui,Fuxin Wang,Dezhou Zheng,Zheng Liu,Qi Feng
Developing highly efficient catalysts for the hydrogen evolution reaction (HER) is crucial for advancing renewable hydrogen energy technologies. Heterophase nanomaterials have shown great promise in catalysis, owing to the synergistic effect among various phases and the abundance of active sites located at the phase boundaries or interfaces. However, achieving precise control over these phase structures during synthesis remains a significant challenge. In this work, we explored a one-pot synthesis method for amorphous/crystalline heterophase Rh nanoparticles, with crystallinity tunable by adjusting the quantity of urea and reaction duration. Due to the increased electrochemical active sites, enhanced electron transport, the resulting amorphous/crystalline heterophase Rh exhibits superior HER activities in both acidic (with an overpotential of 27 mV) and alkaline media (with an overpotential of 21 mV), surpassing that of commercial Pt/C and crystalline Rh. Theoretical calculations indicate that the amorphous/crystalline structure reduces the kinetic barrier for water splitting and optimizes adsorption free energy of hydrogen (ΔG H∗ ), thereby enabling the catalyst to exhibit significantly enhanced HER performance. This exploration offers a valuable reference for designing amorphous/crystalline heterophase structures and demonstrates the great potential of phase engineering strategy in the development of electrocatalysts.
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
危险品化学品经营许可证（带存储）