JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 30
·期 3
·921-936
·
IF 2.523
Guangjian Wang,Hongyu Gao,Qingxi Cao
Mesoporous molecular sieves silica materials had been functionalized employing 3-aminopropyltriethoxysilane as the surface decoration agent by a post-synthesis method and Eu and Ti with different loading ratio were synchronously anchored on amino-functionalized silica framework by incipient wetness impregnation method, respectively. The structures of the synthesized samples were evaluated by means of X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible spectra, scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy and solid-state 29 Si magic angle spinning nuclear magnetic resonance spectra. The results revealed that the highly ordered mesoporous two dimensional hexagonal structure and the mesoporous channel structure were well preserved and isolated tetrahedral surface Eu3+ and isolated [TiO4] or [HOTiO3] species were found to be grafted and highly dispersed in the amino-functionalized mesoporous framework. A significant enhancement in selectivity and conversion for the photocatalytic epoxidation of styrene has been achieved by synergistic effect based on surface ligand effect and electron density effect between Eu 3+ and Ti 4+ species on amino-functionalized mesoporous silica framework. The factors associated with the conversion of styrene and selectivity to styrene oxide such as the solvent, metal loading, the amount of NaOH, H 2 O 2 /Styrene, the amount of catalyst and reaction time were also investigated in details. The desired selectivity (84%) to styrene oxide and excellent conversion (32%) of styrene for the photocatalytic epoxidation of styrene with turnover frequency of 3.1 × 10 −4 s −1 were obtained using aqueous H2O2 as an oxidant in the presence of acetonitrile solvent under ambient temperature.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 12
·120504
·
IF 3.9
Zhenyu Fu,Yuhan Li,Lirong Huang,Weiya Zhang,Ling Weng
Lithium metal batteries are considered promising contenders for the next generation of high energy density batteries. However, lithium metal anode with inhomogeneous lithium deposition in liquid electrolyte causes the uncontrolled growth of lithium dendrites. Owing to the high dielectric constant, thermal stability and electromechanical stability of polyvinylidene fluoride, we design a novel gel polymer electrolyte consisting of porous polyvinylidene fluoride polymer matrix, liquid electrolyte, ethylene carbonate and MIL-125 (Ti) (Ti8O8(OH)4(BDC)6, BDC = 1,4-benzene dicarboxylate) for facilitating Li+ transfer and alleviating the growth of lithium dendrites. The high dielectric constant environment facilitates the dissociation of Li+, and the porous polymer matrix structure accommodates more Li+ for fast transfer. Ethylene carbonate reduces the crystallinity of the polymer matrix and improves the ionic conductivity. MIL-125 (Ti) nanoparticles with surface area and uniform micropores improve toughness for enhancing mechanical property, and synergistically promote the Li+ transfer for building stable interfacial phase to alleviate the growth of Li dendrites. Therefore, the gel polymer electrolyte has high ionic conductivity of ∼1.50 × 10−3 S cm−1 at 25 °C, and quasi-solid-state Li/LiFePO4 battery has high discharge capacity of 153.5 mAh g−1 after 250 cycles at 25 °C and 0.3 C.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Rui Cao,Langlang Wang,Xueqian Wang,Yibing Xie,Xiang Li,Ping Ning
The low-temperature conversion of corrosive carbonyl sulfide (COS) in steel by-product gas is essential for the clean utilization of this gas. Herein, La-Ti@K catalysts doped with La nanoparticles were shown to exhibit significant photopromoted thermocatalytic activity and stability under UV light irradiation. At a reaction temperature of 60 °C, the TOF value increased from 4.84 × 10 -4 s −1 (TiO 2 , thermal treatment) to 8.43 × 10 -4 s −1 (La-Ti@K, photothermal treatment), and the H 2 S selectivity exceeded 99%. This was because La doping increased the density of basic sites on TiO 2 , which promoted the continuous dissociation of H 2 O in the system and the regeneration of –OH under UV irradiation. Moreover, the photogenerated electrons from TiO 2 were transferred to La to maintain the metallic La nanoparticles, as well as to ensure the activation and photothermal hydrolysis of COS. The presence of a suitable electron-metal-support interaction (EMSI) between the electron-rich La nanoparticles and TiO 2 might be responsible for these phenomena. In addition, theoretical calculations revealed that light-induced electron transfer was conducive to H 2 O dissociation and COS activation, while La doping reduced the free energy of the hydrolysis reaction. This work demonstrates the effectiveness of La-Ti@K catalyst in COS photothermal hydrolysis and provides a theoretical basis for further understanding of the photothermal catalytic mechanism.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Fei Wu,Zheng-Qing Yang,Wen Sun,Xu Chen,Hui Qi,Li-Da Wang
Ti/SnO2-Sb-Ir electrodes doped with a low Ir content were prepared, and they were used in acidic water electrolysis for the oxygen evolution reaction (OER). The results showed that an IrO2–SnO2 solid solution was formed, and the electrode surface was relatively compact. The doping of IrO2 could significantly improve the electrocatalytic activity and stability of Ti/SnO2-Sb electrode for OER. The electrode modified with only 5 mol % Ir met the needs of acidic water electrolysis. Meanwhile, the performances of the electrode approached that of Ti/IrO2 when Ir content was only 8 mol %, which resulted from the fact that IrO2 doping improved the chemical stability as well as the electrocatalytic activity of the electrode. Moreover, the deactivation behavior of the electrode was investigated as well. It was mainly ascribed to the chemical composition and morphology change induced by continuous dissolution of the metal oxides, which eventually led to the passivation of the Ti substrate.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yue Mao,Guang-Hui Chen,Xiaofeng Yi,Yao Kang,Jian Zhang,Lei Zhang
In this study, with the assistance of quaternary ammonium salts we have successfully prepared a new family of salicylate-stabilized heterobimetallic Pb–Ti–oxo clusters, including H(TEA)[Pb2Ti6(μ2-O)2(μ3-O)2(OiPr)4(PA)2(Sal)6(NO3)2] (PTC-321; TEA = tetraethylammonium; HOiPr = isopropanol; H2PA = phenylphosphonic acid; H2Sal = salicylic acid), {PbTi3(μ2-O)(μ3-O)(OiPr)2(PA)(Sal)3(DMF)·CH3CN}n (PTC-322; DMF = dimethylformamide), {PbTi5(μ3-O)6(Sal)3(CH3COO)2(DMF)(OiPr)2}n (PTC-323), [Pb2Ti4(Sal)6(EtO)2(OiPr)6(HOiPr)2]·CH3NH2 (PTC-324; EtOH = CH3CH2OH), H[Pb4Ti9(μ2-O)2(μ3-O)(μ4-O)6(Sal)7(OiPr)13] (PTC-325), and Pb2Ti12(μ2-O)3(μ3-O)3(μ4-O)4(Sal)4(OEt)24 (PTC-326). Single-crystal X-ray diffraction studies demonstrate that the {Ti3Pb(Sal)3} unit acts as the building block to constitute the diverse assembly of PTC-321–PTC-323. Thereinto, the clusters in PTC-322 and PTC-323 are connected into infinite one-dimensional chains. Furthermore, the solvent effects have facilitated the heterobimetallic Pb–Ti–oxo clusters into various configurations in PTC-323–PTC-326. Solid-state ultraviolet–visible spectroscopy analysis indicates that the optical absorption bands of these compounds shift effectively toward the visible-light region, and they were also employed as electrode precursors to investigate their visible-light-driven photocurrent response.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 20
·9148-9161
·
IF 6.7
Zheng Liu,Hong Ding,Miaomiao He,Yulin Jiang,Lin Qi,Meixuan Du,Jing Wang,Yubao Li,Limin Liu,Ganjun Feng,Li Zhang
Desirable antibacterial and osseointegration abilities are essentially important for long-term survival of a Ti-orthopedic implant. Herein, a near-infrared light (NIR) excited antibacterial platform with excellent osseointegration composed of perovskite calcium titanate/nickel hydroxide on a Ti implant (Ni(OH)2@CaTiO3/Ti) was designed and successfully fabricated. The construction of the heterostructure efficiently separated the photogenerated electron–hole pairs to produce sufficient reactive oxygen species (ROS), which enabled the photoactivated bacterial inactivation (PBI) of Ti implants. The results showed that the surface-modified Ti implant displayed remarkable antibacterial ability with bacterial inhibition rates of 95.5% for E. coli and 93.8% for S. aureus under NIR excitation. Also, the intervention of Ni(OH)2 could create a slightly alkaline surface on the Ti implant, which synchronized with Ca-rich CaTiO3 to regulate the osteogenic microenvironment in favor of the adhesion, proliferation and differentiation of MC3T3-E1 cells as well as the up-regulation of osteogenesis-related gene expressions. The in vivo implantation experiments further confirmed that the heterostructured coating prominently accelerated the formation of new bone and promoted the osseointegration of Ti implants. Our work may provide a novel concept for improving the antibacterial and osseointegration abilities of Ti implants in orthopedic and dental applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yeyin Zhang,Ruting Huang,Yong Fang,Jiacheng Wang,Zijie Yuan,Xinwei Chen,Wenjie Zhu,Yuan Cai,Xianyang Shi
This study developed metal–organic frameworks (MOFs) with enhanced properties for CO 2 conversion by doping second- transition metal ions (Ti, Mn, Zn, and Cu) into Fe–MOF, which resulted in Fe-M−MOF (M = Ti, Mn, Zn, or Cu). The selection of different metal species in the metal cluster nodes of the MOFs significantly impacted the CO 2 conversion efficiency. Among the different combinations, the Fe–Cu bimetallic cluster node was identified as the most optimal node. In addition, we investigated various variables and preparation conditions for determining the optimal synthesis conditions for Fe–Cu-MOFs. We observed that a synthesis temperature, time, and pH of 130 °C, 15 h, and 3.2, respectively, yielded the best results. The 13 CO 2 isotope labeling method confirmed that the carbon source of CO and CH 4 were derived from CO 2 . Under simulated visible-light irradiation (λ ≥ 420 nm), Fe–Cu-T130 exhibited the highest photocatalytic activity, with a CH 4 generation rate of up to 444.2 μmol g −1 h −1 . This high activity was attributed to several factors. First, the presence of Fe 2+ , Fe 3+ , and Cu 2+ on the surface of Fe–Cu-T130 resulted in photogenerated electrons and holes under visible-light excitation. Fe 2+ accepted electrons to reduce CO 2 , whereas Fe 3+ and Cu 2+ oxidized H 2 O through holes. Second, the polycrystalline structure of Fe–Cu-T130 with abundant surface oxygen vacancies enhanced the chemical reactivity. Finally, the low conduction band position and narrower bandgap of Fe–Cu-T130 facilitated the excitation of electrons into the conduction band, thereby promoting the CO 2 reduction reaction. This study successfully demonstrated the enhanced photocatalytic activity of Fe–Cu-T130 for CO 2 conversion under visible light. The findings provide insight into the development of MOFs with improved properties for the sustainable and efficient utilization of CO 2 .
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Miao Lu,Siyuan Zhang,Zhongmei Song,Liang Ma,Haining Liu,Ming Fang,Huifang Zhang,Xiushen Ye,Zhijian Wu
Increased levels of octadecylamine (ODA) and 4-dodecylmorpholine (DMP) in the aqueous, primarily utilized as flotation agents in the worldwide production of potash fertilizer, imperil the stability of ecosystems and the downstream production of high-end chemicals. Nevertheless, there is a dearth of exhaustive studies pertaining to the elimination of ODA and DMP. Herein, the Ti/SnO 2 -Sb/β-PbO 2 anode was fabricated by a thermal decomposition-electrodeposition technique for the electrocatalytic degradation of ODA and DMP. The degradation efficiency of ODA and DMP can achieve complete degradation, reaching 100%, after treatment periods of 10 min and 120 min, respectively. Meanwhile, the TOC removal efficiency of ODA and DMP is up to 85% and 61% at 30 min and 120 min, respectively. In particular, sulphate exhibits inhibitory degradation activity of ODA and DMP in comparison to chloride salt. The recycling and accelerated lifetime tests indicate excellent stability and recyclability of the Ti/SnO 2 -Sb/β-PbO 2 electrode. The mechanism of electrocatalytic degradation involves indirect electrochemical oxidation mediated by free radicals. The primary reactive species responsible for the degradation of DMP and ODA, as determined through scavenger quenching experiments and ESR, are ·OH and Cl·. The degradation of the ODA and DMP commences with the elimination of N element, leading to the formation of the N O 3 - . The carbon chain subsequently undergoes the breakdown. The degradation pathways of ODA and DMP were also proposed based on the GC–MS and H-NMR analyses, respectively. Moreover, the Ti/SnO 2 -Sb/β-PbO 2 anode performed excellently in the removal of ODA and DMP in real samples, TOC removal from ODA and DMP in natural samples was 56% and 52%, respectively, within 180 min. This study provides the first exploration of electrocatalytic degradation mechanisms and pathways of ODA and DMP based on the Ti/SnO 2 -Sb/β-PbO 2 anode.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 151
·期 10
·3067-3078
·
IF 3.186
Zhu Ying,Yang Jiandong,Bian Chang,Yang Wenshu,Meng Xianwei,Liu Zhiyan,Li Ying,Zhao Yingying,Fu Wuyou,Yang Haibin
Abstract A new strategy to enhance the photocatalytic properties of graphitic carbon nitride is reported via constructing an effective NiO decorated Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 S-scheme heterostructure photocatalyst thin film (Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 /NiO). This thin film photocatalyst can separate hydrogen gas and oxygen gas into different sides of the Ti substrate. Owing to the synergistic effect of the NiO as co-catalyst and the formation of Step-scheme (S-scheme) heterojunction between g-C 3 N 4 and TiO 2 , the electrons and holes were successfully separated to their opposing active centers, which is beneficial to inhibiting the recombination of the charge carriers. The gas evolution rate of Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 /NiO is 7.97 μmol h −1 cm −2 under the irradiation of high-pressure mercury lamp, which was 3 and 1.3 times as high as that of the Ti/TiO 2 NT/g-C 3 N 4 and Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 , respectively. Firstly, benefiting from the well-matched band structure, a direct S-scheme Ti/TiO 2 NT/g-C 3 N 4 heterojunction thin film is constructed easily driven by the built-in electric field across the Ti/TiO 2 NT/g-C 3 N 4 interface. Furthermore, the introduction of the TiO 2 layer on the TiO 2 NT will broaden light absorption range and increase the heterojunction area, which in turn conduces to effective charge separation. In addition, NiO as a co-catalyst cannot only accelerate the charge separation but also provide plentiful catalytic sites and decompose H 2 O 2 produced by g-C 3 N 4 . The thin film photocatalysts can be recycled again, which is different from traditional powdered photocatalysts. This work constructs a NiO decorated Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 S-scheme heterostructure photocatalyst thin film, and provides a new insight to promote photocatalytic activity of g-C 3 N 4 under the synergetic impact of S-scheme heterostructure and NiO co-catalyst. Graphic Abstract
A novel NiO decorated Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 S-scheme heterostructure photocatalyst thin film was fabricated to enhance photocatalytic activity for water splitting.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Rui Yang,Fan Zhang,Xin Lei,Yongping Zheng,Guohua Zhao,Yongbing Tang,Chun-Sing Lee
Magnesium-ion batteries (MIBs) have received increasing attention for next-generation energy storage recently because of the natural abundance, high capacity, and dendrite-free deposition of Mg. However, their applications are hindered by irreversible Mg anode plating in conventional electrolytes and the lack of cathode materials, demonstrating high working voltage, satisfactory Mg2+ diffusivity, and long cycling life. In this work, we first developed a novel magnesium-ion based dual-ion battery (Mg-DIB) by utilizing expanded graphite as the cathode and Ti-doped niobium pentoxide nanoflakes (Ti–Nb2O5 NFs) as the anode. The Ti–Nb2O5 NFs showed hierarchical structures of microspheres with diameters of 4–5 μm assembled by nanoflakes. For the first time, the Mg-ion storage mechanism in Ti–Nb2O5 NFs was investigated. Benefiting from the hierarchical structure design and pseudocapacitive intercalation behavior of Mg ions, the Ti–Nb2O5 NF anode exhibited fast Mg-ion diffusion. Consequently, the Mg-DIB exhibited a high discharge capacity of 93 mA h g–1 at 1 C (1 C corresponding to 100 mA g–1), along with good long-term cycling performance with a capacity retention of 79% at 3 C after 500 cycles. The Mg-DIB also demonstrated a capacity retention of 77% at 5C, indicating its good rate performance. Moreover, the Mg-DIB exhibited a high discharge medium voltage of ∼1.83 V, thus enabling a high energy density of 174 W h kg–1 at 183 W kg–1 and 122 W h kg–1 at a high power density of 845 W kg–1, among the best of the reported magnesium-ion full batteries. Our work provides a new strategy to improve the performance of MIBs and other rechargeable batteries.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Lanqing Ling,Yu Tu,Xuanyu Long,Qianwen Li,Jiabao Gu,Nan Liu,Zequan Li
The emission of organic dye wastewater poses a great threat to the ecological environment. Therefore, it is necessary to prepare environment-friendly photocatalytic materials with high photocatalytic performance to degrade organic dyes. In this work, a new composite photocatalyst SnS 2 /NH 2 -MIL-125 (Ti) was formed by loading the multiphase SnS 2 of quantum dots (QDs) and hexagonal nanodiscs (NDs) on the NH 2 -MIL-125 (Ti) through one-step hydrothermal method , then used it to remove 40 mg/L Rhodamine B (RhB) under visible light . Compared with SnS 2 and NH 2 -MIL-125 (Ti), the photocatalytic degradation activity of the 12 wt% SnS 2 /NH 2 -MIL-125 (Ti) was enhanced by 2.4 and 2.1 times respectively, reaching 90.5%, after 80 min of visible light irradiation. The four times recycling test shows that this photocatalyst has outstanding stability and durability. Through analysis, NH 2 -MIL-125 (Ti) modified SnS 2 can improve visible light absorption, provide more active sites and inhibit photoelectron-hole recombination, thus enhancing photocatalytic activity . Superoxide radical (•O 2 − ) and hole (h + ) were determined to be the key active substances in the process by the reaction substance capture experiment. The photodegradation mechanism of RhB is also investigated and studied in detail. This novel multiphase SnS 2 /NH 2 -MIL-125 (Ti) material provides a new perspective for the design of organic-inorganic composite photocatalysts with excellent performance and improved stability, and has potential application in environmental purification.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Yunlei Zhou,Yue Wang,Shurong Li,Xi Fang,Huanshun Yin,Po Wang,Shiyun Ai
Photoelectrochemical (PEC) immunosensor was designed to detect N 1 -methyladenosine (m 1 A), where BiVO 4 /g-C 3 N 4 heterojunction was employed as photoactive material, polyamidoamine (PAMAM) and 4-carboxyphenylboronic acid (CPBA) were used as m 1 A antibody immobilization matrix, and Ti-based metal-organic framework encapsulated heterostructure of TiO 2 @NH 2 -MIL-125(Ti) was adopted as signal amplification. Due to the interaction between TiO 2 and phosphate, TiO 2 @NH 2 -MIL-125(Ti) was captured after immunoreaction between m 1 A and its antibody, which can further improve the detection sensitivity with increased PEC response. Under optimal experimental conditions, this method presented wide dynamic range (0.05–35 nM) with the low determination limit (16.7 pM, S/N = 3). This detection strategy showed good detection reproducibility, stability and selectivity. This method was applied to assess the effect of antibiotics on m 1 A content in the leaves, stems and roots of rice seedlings.
✓ 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）