JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zehui Zhu,Weiguang Hu,Xiao Wu,Qinguo Zhang,Yan Hu,Qing Yan,Xuefei Wang,Weiyong Yuan
Highly efficient metal–organic framework (MOF)-based oxygen evolution reaction (OER) catalysts are desirable for water splitting, but their development remains challenging due to poor accessibility of coordinatively unsaturated metal (cum) sites and low intrinsic activity. A large-area three-dimensional (3-D) macroporous interconnected nanosheet array of Ni-1,3,5-benzenetricarboxylate has been in situ self-assembled on Ti mesh (TM) by using ethanol as the solvent and high-affinity oxide layer on TM to promote in situ nucleation. The obtained nanoarchitecture exhibits much superior catalytic activity compared to most reported catalysts including MOF-based catalysts, other precious-metal-free ones, and Ir/Ru-based ones. Additionally, this electrode undergoes no current decay after 300 cyclic voltammetry (CV) cycles and can maintain at 250 mA cm −2 for over 266 h. The excellent catalytic performance is mainly due to the 3-D macroporous and interconnected nanosheet array structure improving cum site exposure and charge transport and in situ activated cum cations enhancing OH − adsorption. This work not only develops a facile and economical approach to synthesize 3-D macroporous interconnected MOF nanosheet arrays to simultaneously increase the number, exposure, and intrinsic activity of active sites and facilitate charge transport for high-performance eletrocatalysis, but provides scientific insights into the mechanisms for self-assembly of this unique nanoarchitecture and for the high OER performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
He Xiao,Wenyao Zhang,Qiushi Yao,Liulian Huang,Lihui Chen,Bruno Boury,Zhongwei Chen
Metal organic frameworks (MOFs) are exploited in many applications of materials science and very recently were investigated as precursors or reagents for material synthesis. In a new way different from previous approaches, here we introduce for the first time the synthesis of metal oxide M x O y in the presence of M-free MOF acting partially as a sacrificial template and as a provider of doping metal atom. We demonstrate this approach in the case of ZnO prepared by a simple hydrothermal method in the presence of a Zn-free MOF like MIL-53(Al) or MIL-125(Ti). The resulting ZnO show low content of Al or Ti < 2% and properties are significantly different depending on whether MIL-53(Al) or MIL-125(Ti) are used or if no MOF is present. The nature and presence of MOF has different major effects on the morphology, the specific surface area of as prepared ZnO and also on the oxygen defects in its crystal structure. Corroborating the XPS, UV–vis DRS, PL, EPR and DFT studies evidence the role of such O-defects on band gap narrowing for samples calcined at 400 °C. These exhibit high efficiency in photodegradation of methyl orange (MO) compared to ZnO prepared in MOF-free conditions or previous literatures. The kinetics of MO degradation is different depending on the morphology, the specific surface and oxygen defects. The present data open the door to a new approach of the synthesis of metal oxides and a control of their properties.
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Chao Cai,Shan He,Lifan Li,Qing Teng,Bo Song,Chunze Yan,Qingsong Wei,Yusheng Shi
In-situ synthesized titanium borides reinforced Ti-6Al-4V composites with a tailored reinforcement architecture were successfully prepared by hot isostatic pressing (HIP) starting from a TiB 2 /Ti-6Al-4V powder system. The microstructure of the composite samples was investigated using X-ray diffraction (XRD) technique and scanning electron microscopy (SEM), and the mechanical properties were evaluated through room and high temperature tensile testing . It is found that during HIP the additive particles TiB 2 have totally transformed into TiB needles, which tend to decorate at prior particle boundaries of the consolidated powder particles to form a network structure. With increasing TiB 2 addition from 3 wt.% to 8 wt.%, the microstructural feature of the TiB network structure experiences the variations of discontinuous TiB reinforcement → quasi-continuous TiB reinforcement → continuous TiB reinforcement. The room temperature tensile properties of the composites are improved with increasing addition of TiB 2 from 3 wt.% to 5 wt.%, but the tensile strength of the sample with 8 wt.% TiB 2 drastically decreases. As to the high temperature properties, the titanium boride reinforced Ti-6Al-4V alloy composites can be an increased maximum service temperature by over 200 °C while retaining the same tensile strength accompanied with a suitable elongation. The strengthening mechanism is mainly attributed to the load-bearing transformation, grain refinement and dispersion strengthening.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yue Liu,Dongdong Wang,Heng Zhang,Lili Liu,Liu Pei,Shaobo Huang,Xindong Wang
Nowadays, Ti-based materials are used as the construction materials of anode porous transport layers (PTLs) in proton exchange membrane water electrolysis (PEM WE). The major limiting factors of Ti anodes include passivation and corrosion. Herein, the challenges are addressed by using selective pulsed electrodeposition (PE), preparing orientated Au nanoparticles (AuNPs) and a degradable polypyrrole (PPy) composite coating (PE-Au/PPy coating) on Ti-based PTLs. The PTL treatment consists of four steps: electropolymerizing of PPy, mechanical polishing of PPy outside the pores of Ti felts, acid etching, and final electrodepositing AuNPs. Testing results show that etched Ti enables AuNPs to be preferentially deposited on the active surface to make the PE-Au/PPy coating highly conductive, effectively inhibiting Ti passivation. PPy formed a conductivity difference with highly active acid-etched Ti, promoting the preferential deposition of AuNPs on the active Ti surface, which improves noble metal utilization. The PE-Au/PPy coating presents a low interfacial contact resistance (ICR) (ca. 0.9 mΩ cm2 at 140 N cm–2) and excellent corrosion resistance (0.17 μA cm–2) in the simulated PEM WE environments. Significantly, the PE-Au/PPy coating exhibits high electrochemical properties and ultralong lifespans of over 1000 h, still with a low ICR (1.5 mΩ cm2), further validating the usefulness of the protective layer. In addition, here the preferential deposition process of AuNPs on the Ti surface is analyzed using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR), clarifying the protective mechanisms in PE-Au/PPy coating. Overall, this work not only shows the great potential of PE-Au/PPy coating as PTL anode materials but also optimizes noble metal utilization.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jianping Ding,Xiaoyan Zhou,Zhengzheng Yang,Changgeng Liu,Mingchao Sun,Congling Yang,Lu Fan
In this study, a novel strategy was proposed for synthesizing dual single-atom Ce-Ti catalysts supported on γ-Fe 2 O 3 via ball milling and calcination. Compared to γ-Fe 2 O 3 and single-atom Ce/γ-Fe 2 O 3 and Ti/γ-Fe 2 O 3 catalysts, the Ce-Ti/γ-Fe 2 O 3 catalyst exhibits superior NO conversion rates and significantly enhanced tolerance to H 2 O and SO 2 at 200–240 °C. These advancements are attributed to the synergistic interactions between Ce and Ti, which enhance redox properties, increase Lewis acid site density, and facilitate the Langmuir-Hinshelwood reaction pathway. In-situ DRIFTS and density functional theory (DFT) analyses revealed the mechanistic role of surface-active oxygen species and intermediate formation in promoting the SCR reaction. The findings provide valuable mechanistic insights and establish a scalable approach for the development of high-performance, environmentally friendly catalysts for industrial NO x removal.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·
IF 3.5
Hongbin An,Ruoyu Chen,Saisai Li,Lingfeng Huang,Wenbao Jia,Qianfang Wu,Aiqing Mao
Powder synthesis is crucial for achieving the densification and facilitating widespread applications of high entropy carbide (HEC). Specifically, the production of fine particle-size powders is essential to enhance the densification of HECs. Consequently, this paper proposes the molten salt method for synthesizing HEC powders. The synthesis process successfully yielded (Ta Nb Ti V) C powders with a particle size of only 0.44 µm at 1400°C, exhibiting a uniform distribution of each element. Subsequent densification of (Ta Nb Ti V) C within the 1700–1900°C temperature range was carried out using spark plasma sintering. It was observed that as the densification temperature increased, the densification and mechanical properties of HEC significantly improved. This study presents innovative ideas for the preparation of HEC at lower temperatures.
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xiaoxia Chen,Yu Ma,Zhengjie Su,Xinxin Zhang,Jinguo Lin,Xiaoyun Chen
Herrin, the lignin extracted from Rice hull , Phyllostachys edulis , Cunninghamia lanceolata, and Populus tomentosa Carrière were used as a soft support to grow Ti-doped Bi 2 (O,S) 3 bimetal oxysulfide catalysts, labeled BT-Rh, BT-Pe, BT-Cl, and BT-Ptc, respectively. The catalytic reduction activity was investigated through the decolorization of methyl orange (MO), methylene blue (MB), and reduction of Cr(VI) solutions under dark. The lignin-supported BiTiOS improved crystallinity, decreased aggregate size, increased specific surface area, and enhanced electrochemical active sites, leading to improve electron transfer and accelerated reduction rates. The catalytic reduction activity of organic dyes and Cr(VI) was significantly improved with lignin-supported BiTiOS. The 5 mg BT-Pe catalyst completely reduced 100 mL of 50 ppm MO, MB, and Cr(VI) solutions in 6, 6, and 18 min, respectively, with the reaction kinetic rate of 0.6782, 1.090, and 0.1189 min −1 , and demonstrated good durability, maintaining a reduction rate of 95 % after six cycles. This work provides a feasible approach combining biomass/inorganic materials to treat industrial wastewater.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Gulizhabaier Abulipizi,Yuxin Wang,Yanlun Fang,Yicheng Xu,Chaomin Qu,Ziang Zong,Leping Ding,Zimin Yu,Juanjuan Zhou,Zhanjun Li
Most of near-infrared (NIR) persistent luminescence (PersL) materials can only be activated by ultra violet-visible light illumination or X-ray irradiation, which hinders their advanced biomedical applications. Herein, NaYTi 2 O 6 : Cr, with a typical double-metal perovskite structure, is developed with ∼758 nm emission after being excited by 700 nm light within the NIR bio-imaging window. This NIR-to-NIR PersL property can be repeatedly charged by 700 nm NIR illumination in situ and in vivo . The anti-cite disorder of Na + -Y 3+ pair and relatively low bandgap of NaYTi 2 O 6 matrix are the vital factors of this property. NaYTi 2 O 6 : Cr has great potential to be applied as a functional ceramic coating in designing self-luminescent medical Ti-implants, so that it can be imaged in vivo by using NIR PersL imaging rather than conducting risky X-ray fluoroscopy imaging. This conceptual work not only provides a NIR-to-NIR PersL biomaterial but also is significant in designing visible medical implants.
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Qingmei Qiao,Yunlan Xu,Dengjie Zhong,Xihong Ke,Yuqin Yang,Hanlu Zeng
In order to enhance the carrier separation efficiency and redox ability of photoanode, a dual Z-scheme heterojunction Ce-UiO-66/g-C 3 N 4 /Bi 2 WO 6 /Ti photoanode was prepared and assembled with Cu cathode to form PFC. The characterization results show that Ce-UiO-66/g-C 3 N 4 /Bi 2 WO 6 uniformly distributed on the Ti substrate, with average crystallite size of 9.04 nm and average particle size of 33.05 nm, which provides sufficient reactive active sites for RhB degradation. The RhB degradation rate, P max , J sc , V oc and FF of the PFC were 90.9 % (90 min), 7.53 µW cm -2 , 0.152 mA cm -2 , 0.37 V and 0.134, respectively. The turnover frequency (TOF) for RhB degradation by the PFC reached 0.98 h -1 . Fermi energy level analysis shows that a double-Z heterojunction is formed between Bi 2 WO 6 and g-C 3 N 4 , and between Bi 2 WO 6 and Ce-UiO-66, which not only effectively separates photogenerated e - - h + , but also retains the high redox ability of the composite. Moreover, with the introduction of Ce-UiO-66, the composite photoanode has larger specific surface area and wider visible light absorption range. In addition, because of the built-in electric field, the photogenerated electrons can migrate to the surface of composite particles more easily and react with dissolved oxygen to generate more •O 2 - to participate in the degradation of RhB. This work provides a valuable reference for developing PFC photoanode with high efficiency and visible light response.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Hanlu Zeng,Yunlan Xu,Dengjie Zhong,Qingmei Qiao,Yuqin Yang
The performance of a photocatalytic fuel cell (PFC) depends on its photoelectrode. In this work, a novel three-dimensional flower-like hierarchical photoanode Zn Zr MOF/FeWO 4 /BiOBr/Ti was synthesized, characterized and applied in PFC to degrade rhodamine B and generate electricity simultaneously. The characterization results of XRD, SEM, EDS, FI-IR, DRS, and XPS show that the photoanode was successfully prepared. The loading of FeWO 4 and Zn Zr MOF widened the nanosheet spacing of BiOBr, which enhanced the light absorption intensity, broadened the light absorption band edge from 467.6 nm to 490.2 nm, and increased the photocurrent density from 0.0149 mA/cm 2 to 0.156 mA/cm 2 . The maximum photocurrent density, maximum power density, degradation rate , and FF of the PFC with the prepared photoanode were respectively 0.256 mA·cm −2 , 22.65 μW·cm −2 90.48 % (1 h), and 0.216, which were far higher than those of PFCs with mono and binary photoanodes. The strong photocatalytic performance of the photoanode is attributed to the type II heterojunction formed between BiOBr and FeWO 4 , which helps to separate electron-hole pairs. The main reactive materials responsible for degrading rhodamine B are h + and ·O 2 - . This research provides a new idea for developing an efficient visible light response photoanode.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 8
·1-9
·
IF 6.232
Li Jingxian,Jiang Ding,Shan Xueling,Wang Wenchang,Chen Zhidong
A novel “off-on” electrochemiluminescence (ECL) aptasensor based on ECL resonance energy transfer (RET) system from 3,4,9,10-perylenetetracar-boxylic acid/the metal-organic frameworks NH 2 -MIL-125(Ti) (PTCA/NH 2 -MIL-125) to Au nanoparticles (Au NPs) was put forward for microcystin-LR (MC-LR) assay. The electrochemiluminescence (ECL) emission spectra of PTCA/NH 2 -MIL-125 show excellent spectral overlap with the UV-vis absorption spectrum of Au NPs. A linear response ranging from 10 fM (9.95 × 10 −6 μg L −1 ) to 0.1 μM (99.5 μg L −1 ) was obtained, and the detection limit was 3.6 fM (3.58 × 10 −6 μg L −1 ) under optimal conditions at a potential of − 1.6 V ( S/N = 3). Besides, the prepared ECL-RET MC-LR aptasensor exhibited good selectivity and stability.
Graphical abstract
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Mingjia Zhang,Shule Zhang,Fanyu Meng,Mengjie Hu,Zhongyu Wang,Yiqing Zeng,Qin Zhong
Promoting the formation of Ti-OOH in the TiO 2 -based-catalyst/H 2 O 2 /O 3 system is critical to further develop the catalytic peroxone process for low-temperature flue gas denitration. In this study, a series of phosphorus-doped TiO 2 with rich Lewis acid sites and high stability was designed and established, achieving 94 % NO oxidation efficiency with less oxidant (373 K, H 2 O 2 /NO = 1.2, O 3 /NO = 0.5) and high GHSV (1.2 × 10 5 h −1 ). Combining characterizations and DFT results, a possible mechanism was proposed: phosphorus-doping enhanced the Lewis acidity, which was conducive to the adsorption and activation of H 2 O 2 . Moreover, P-TiO 2 significantly promoted the H 2 O dissociation and Ti-OOH formation process by reducing the energy barrier, thereby promoting the synergistic effect between O 3 and Ti-OOH. The semi-in-situ UV–vis DRS demonstrated that the catalytic peroxone process occurs at the solid–liquid interface and the Ti-OOH is consumed in the catalytic process. We hope this work provide a new investigation method and insight into the catalyst design.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）