Energetic Materials Frontiers
·
2025
·
IF 3.9
Su-hang Chen,Jie Zhang,Kui Tang,Xi Chen,Jia Zhao,Tuan Zhao,Bin Zhang,Kang-zhen Xu
Microwave ignition (MWI) technology enables synchronized large-area multi-point ignition, multi-pulse operation, higher combustion temperature and efficiency, and dynamic thrust modulation through microwave field adjustments compared to conventional electric ignition methods. However, MWI application is still limited by the absence of a microwave-responsive ignition agent. Herein, A series of nano-titanium/copper ferrite/potassium perchlorate ( n- Ti-CFO/KP (0∼40%)) microwave-sensitive agents were successfully synthesized via electrostatic spraying, where KP enhances combustion, while CFO acts as both catalyst and microwave sensitizer. MWI results demonstrate that n- Ti-CFO/KP (10%) exhibits the shortest ignition delay time (IDT) by 6.34 ms, owing to its high chemical reactivity and the high microwave absorption of Ti, CFO. Combustion analysis suggests that n- Ti-CFO/KP (40%) composite achieves 10-fold combustion enhancement over KP-free ignition agents by a peak pressure of 552.2 kPa and combustion rate of 221.4 m·s -1 , while n- Ti-CFO/KP exhibits the combustion flame temperature of 1250 °C compared to n- Ti-CFO by 700 °C. This remarkable improvement is attributed to the synergistic catalytic activation and combustion - supporting effects of CFO. Furthermore, n- Ti-CFO/KP (10%) exhibits comparable combustion and sensitivity performance to conventional agents ( μ- Ti/KP and B/KNO 3 ). The n- Ti-CFO/KP (10%) shows its main exothermic peak at 310 °C, significantly lower than the 550 °C peak observed for μ- Ti/KP, as well as the excellent catalytic decomposition effect of CFO on KP was further confirmed, where the low reaction temperature can shorten the microwave dielectric heating time. The synergistic effect and combustion intensification result from the coupled interaction between the microwave thermal characteristics of n- Ti-CFO and low-temperature oxygen release kinetics of KP. This coupling achieves significantly reduced MWI delay and enhanced energy release rates, thereby overcoming traditional combustion's reliance on high-temperature conditions. This result provides a new insight into the design of pyrotechnics and propulsion for fast plasma generation and microwave combustion.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Qian Zhou,Derong Liu,Guoyuan Yuan,Yi Tang,Kuncheng Cui,Songshan Jiang,Yongde Xia,Wei Xiong
Novel Ti/PbO 2 -Cr-PEDOT electrodes were prepared by electrodeposition for electrochemical degradation of phenolic wastewater. The electrodes were characterized by XRD, SEM-EDS, XPS, and FT-IR to study the crystalline, surface morphology, elements distribution, and microstructure of the electrodes. A flat and compact interface was obtained with Cr and PEDOT doping into β-PbO 2 plate by electrodeposition method. The linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) were conducted to explore the electrochemical performance of the prepared electrodes. The Ti/PbO 2 -Cr-PEDOT electrode exhibited a higher oxygen evolution potential (OEP, 2.53 V vs SCE) and a lower charge transfer resistance compared with Ti/PbO 2 . Phenol degradation efficiency of 100% and TOC removal rate of 95.02% were achieved in the electrochemical degradation of phenol within 120 min. The optimal process parameters (phenol concentration = 1000 mg·L -1 , electrolyte concentration = 4.0 g·L -1 , current density = 15 mA·cm −2 and electrode distance = 3 cm) in the process of electrochemical oxidation of phenol wastewater were explored. Active species trapping experiments proved that ·OH radicals played an important role in the electrochemical system. Furthermore, the electrode also showed high activity for the degradation of other phenolic wastewaters such as phloroglucinol (η DEP = 100%), bisphenol A (η DEP = 97.17%) and p-chlorophenol (η DEP = 89.77%) within 60 min. A possible degradation pathway was proposed based on the intermediate products determined by HPCL. The Ti/PbO 2 -Cr-PEDOT electrode showed excellent stability with only 3% loss of degradation efficiency (η DEP = 96.95%) after recycling tests for 5 times. These results suggest that Ti/PbO 2 -Cr-PEDOT is a promising electrode for electrochemical degradation of phenolic wastewaters.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Shiting Luo,Xiaoshan Lin,Limei Xu,Huicheng Guo,Jieyi Lai,Jianglun Wu,Yifei Feng,Lin Ma
In this work, a template-free hydrothermal strategy has been developed to fabricate 3D hierarchical MoS 2 microflowers on macroporous Ti mesh (MoS 2 MF-Ti) as a binder-free electrode for hydrogen evolution reaction (HER). It is found that the Ti mesh is able to provide an ideal platform for self-assembly of the MoS 2 nanosheets into the hierarchical microflowers. The as-prepared MoS 2 MF-Ti electrode is characteristic of meso/macro porous structures, abundant active edges and good conductivity. As a result, the MoS 2 MF-Ti demonstrates greatly enhanced electrocatalytic activity and stability toward HER due to its desirable structural features.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Zhangxing He,Yingqiao Jiang,Jing Zhu,Yuehua Li,Zhen Jiang,Huizhu Zhou,Wei Meng,Ling Wang,Lei Dai
In this paper, LiTi 2-x Sn x (PO 4 ) 3 /C (x = 0, 0.2, 0.3, 0.4) composites were synthesized by sol-gel approach, and were investigated as anodes for aqueous lithium ion battery . Sn doping with proper content has no obvious influence on phase and morphology of the composite, while excessive dosage of Sn can affect its crystal structure. Sn doping can enhance the electrochemical properties of LiTi 2 (PO 4 ) 3 /C (LC). Among LiTi 2-x Sn x (PO 4 ) 3 /C composites, LiTi 1.7 Sn 0.3 (PO 4 ) 3 /C (LC-Sn-0.3) demonstrates the best electrochemical properties. Most importantly, the rate performance of LC can be improved dramatically by Sn doping on Ti sites. LC-Sn-0.3 delivers a discharge capacity of 118.9, 115.3, and 104.2 mAh g −1 at 0.2, 6, and 20 C (1 C = 150 mA g −1 ), respectively, with significant increase of 15.2, 27.4, and 41.9 mAh g −1 compare with LC. In addition, LC-Sn-0.3 exhibits superior cycling performance. The capacity retention for LC-Sn-0.3 can keep 76.8% after 1000 cycles at relatively high rate of 10 C, while only 51.7% of initial discharge capacity is retained for LC. Our study reveals that Sn doping on Ti sites is an efficient and facile method to improve the performance of LiTi 2 (PO 4 ) 3 /C composite for aqueous lithium ion battery.
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Yong Wei,Guijian Liu,Biao Fu,Yuan Liu,Xuan Xue
Fine particulate matter (PM) emitted from coal-fired power plants (CFPPs) has aroused widespread environmental and human health concerns. Cadmium (Cd), as one of the prime toxic air pollutants, which exists in fine PM intensifies its toxicity. In this research, three particle sizes of PM (PM 1 , PM 2.5 , and PM 10 ) at the outlet of electrostatic precipitator (ESP), along with feed coal, bottom ash, and ESP ash, were collected from a 300-MW pulverized CFPP. Results showed that Cd was more enriched in the fly ash than in bottom ash. With the PM diameter decreasing, the relative enrichment index (REI) value of Cd increases from 2.30 to 7.84. The concentration of Cd was found to be intimately related to Ti in the PM. Abundant Ti-rich particles were identified in the PM 1 , having quite different chemical compositions as compared to particles larger than 2.5 μm. The major processes governing the formation of Ti-rich particles included melting of silicate-bound Ti and heterogeneous condensation of gaseous Ti from the decomposition of organic-associated Ti in coal. The transformation behavior of Cd to PM in a coal combustion process was discussed based on its occurrence mode in coal, thermodynamic property, and the possible interactions with ash particle compositions. The retention of Cd (g) by Ti-rich particle were probably dominated by chemisorption at high temperature; at lower temperature, physical adsorption or condensation may be the primary mechanisms for capturing CdCl 2 (g).
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Huiling Liu,Jinglong Han,Jili Yuan,Chengbin Liu,Dong Wang,Tian Liu,Meijun Liu,Jinming Luo,Aijie Wang,John C. Crittenden
Efficient elimination of antibacterial activity of halogenated antibiotics by dehalogenation pretreatment is desired for a biochemical treatment process. In this study, crystalline cobalt phosphide nanosheet arrays on a Ti plate (C-CoP/Ti) are fabricated by a simple electrodeposition and phosphorization process. The crystalline structure greatly promotes atomic hydrogen (H*) generation. Moreover, the nanosheet arrays can provide abundant active sites and accelerate electron transfer and mass transport. As a result, the dehalogenation rate of florfenicol (FLO, an emerging organic pollutant) on C-CoP/Ti is 11.1, 2.97, and 13.6 times higher than that on amorphous CoP/Ti, Pd/Ti, and bare Ti, respectively. The C-CoP/Ti electrode achieves 97.4% dehalogenation of FLO (20 mg L–1) within 30 min at −1.2 V (vs Ag/AgCl). Nearly 100% of Cl and 20% of F are broken away within 120 min, showing the highest electrocatalytic defluorination efficiency reported so far. Both experimental results and theoretical calculations reveal that the dehalogenation of FLO on C-CoP/Ti is synergistically accomplished via direct reduction of electron transfer and indirect reduction of H*. This study develops a highly efficient non-noble metal electrode material for dehalogenation of halogenated organic compounds.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jian Shi,Jialin Li,Hui Ma,Donghuai Tu,Qian Zhang,Wei Mao,Jianming Yang,Jian Lu
RuO 2 supported on rutile TiO 2 or SnO 2 has been proved extremely effective for catalyzing the oxidation of HCl into Cl 2 . The supports play a crucial role in the catalyst systems. In this work, Ti-Sn oxides with different Sn/(Sn + Ti) molar ratios (0–0.2) were synthesized by a facile co-precipitation method as supports. The corresponding Ru/Ti-Sn oxide catalysts were investigated in HCl catalytic oxidation and systematically characterized to elucidate the role of Ti-Sn oxide supports on the process. The diffraction, spectroscopy and microscopy results reveal the crystal and surface structures of supports and catalysts. Among all the RuO 2 /Ti 1-x Sn x O 2 catalysts, RuO 2 /Ti 0.97 Sn 0.03 O 2 exhibits the best catalytic activity of 2.6 g Cl 2 ·g cat -1 ·h −1 with only 0.5% Ru loading and excellent stability on stream. Differed from the previous understanding, Ti 0.8 Sn 0.2 O 2 support containing the most rutile phase shows unsatisfying performance. The excessive Sn content renders more crystal disorder and volatile substrate, inevitably lowering the dispersion and stabilization of RuO 2 active phase. However, moderate Sn addition induces well-dispersed SnO 2 and rutile TiO 2 film, facilitating the dispersion of RuO 2 phase on the support surface with more active oxygen species. A large number of oxygen vacancies on Ti 0.97 Sn 0.03 O 2 can act as an active oxygen reservoir and boost catalytic performance.
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2020
·Vol. 7
·期 5
·1566-1581
·
IF 7.683
Zimo Lou,Zheni Wang,Jiasheng Zhou,Chuchen Zhou,Jiang Xu,Xinhua Xu
Electrocatalytic hydrodechlorination (ECH) has been proposed as a potential technology for the effective degradation of organochlorine contaminants. In this study, a nanoscale Pd/TiC catalyst with low resistance was dip-coated onto Ti, aiming to fabricate a stable Pd/TiC/Ti electrode with enhanced ECH reactivity for efficient dechlorination. Electrochemical techniques indicated that the Pd/TiC/Ti electrode had a larger electrochemically active surface area and more rapid interfacial charge transfer than the conventional Pd/C/Ti electrode. In a batch experiment, the dechlorination rate for ECH of 2,4-dichlorobenzoic acid (2,4-DCBA, a model pollutant) by Pd/TiC/Ti was 1.3–14.5 times higher than those by Pd/C/Ti, Pd/MWCNTs/Ti, and Pd/MoS2/Ti, respectively. Scavenger experiments, ESR spin-trapping spectroscopy, and cyclic voltammetry clarified the intensified atomic H* generation by Pd/TiC/Ti. DFT calculations revealed that Pd/TiC/Ti had stronger binding ability with atomic H* (Eads: −2.89 eV vs. −2.44 eV) and 2,4-DCBA (Eads: −3.62 eV vs. −2.15 eV), respectively, when compared with Pd/C/Ti. As a result, enhanced generation of atomic H*, together with strengthened adsorption of atomic H* and 2,4-DCBA, would contribute to a faster ECH reaction. The Pd/TiC/Ti electrode retained its reactivity after 10 successive batch experiments (80 h), and showed high tolerance to the constituents in actual water matrices including lake water and river water. This study proposed a promising ECH electrode for the treatment of chlorinated organics in water matrices.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Pengwei Wang,Xin Zhang,Guofeng Zhao,Ye Liu,Yong Lu
Mn 2 O 3 -Na 2 WO 4 /SiO 2 is considered as the most promising catalyst for the oxidative coupling of methane (OCM) process; however, it only has a better catalytic performance over 800 °C. To improve its low-temperature performance, an attempt has been made to modify the Mn 2 O 3 -Na 2 WO 4 /SiO 2 catalyst using TiO 2 , MgO, Ga 2 O 3 , and ZrO 2 . Among the synthesized catalysts, the TiO 2 -modified Mn 2 O 3 -Na 2 WO 4 /SiO 2 catalyst shows markedly improved low-temperature OCM performance, achieving a high CH 4 conversion of ~23% and a good C 2 -C 3 selectivity of ~73% at 700 °C (the catalyst bed temperature), along with promising stability for at least 300 h without signs of deactivation. In comparison with the unmodified Mn 2 O 3 -Na 2 WO 4 /SiO 2 catalyst, the TiO 2 modification results in significant improvement in the low-temperature activity/selectivity, whereas the MgO modification has almost no impact and the Ga 2 O 3 and ZrO 2 modifications have a negative effect. The X-ray diffraction (XRD) and Raman results reveal that the formation of a MnTiO 3 phase and a MnTiO 3 -dominated catalyst surface is crucial for the improvement of the low-temperature activity/selectivity in the OCM process.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bei Hu,Fushan Geng,Chong Zhao,Bertrand Doumert,Julien Trébosc,Olivier Lafon,Chao Li,Ming Shen,Bingwen Hu
The layered Mn-based oxides (NaxMnO2), which is one of the most promising cathode families for rechargeable sodium-ion batteries, have received considerable attention because of their tunable electrochemical performances and low costs. Herein, a novel P2/O3 intergrown Li-containing Na0.8Li0.27Mn0.68Ti0.05O2 cathode material prepared by Ti-substitution into Mn-site is reported. Benefiting from the synergistic effects of the biphasic composite structure and inactive d0 element substitution, this P2/O3 electrode exhibits high initial charge/discharge capacity and excellent cycling performance. The combination of different characterization techniques including solid-state NMR, electron paramagnetic resonance, X-ray adsorption spectroscopy, and high-resolution transmission electron microscopy gives insights into the local electronic environment, the redox chemistry, and also the microstructure rigidity of these cathode materials upon cycling. On the basis of comprehensive comparison with the Ti-free P2/O3-Na0.8Li0.27Mn0.73O2, the observed improvement on the electrochemical performance is primarily attributed to the mitigation of notorious Mn3+/Mn4+ redox and the enhanced stability of the oxygen charge compensation behavior. From the viewpoint of structure evolution, Ti-substitution restrains the Li+ loss and irreversible structural degradation during cycling. This study provides an in-depth understanding of the electronic and crystal structure evolutions after inactive d0 element substitution and may shed light on the rational design of high-performance P2/O3 biphasic Mn-based layered cathodes.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 14
·6543-6549
·
IF 3.591
Ziqi Zhang,Xiang Ni,Kaida Yao,Siqi Zhang,Yang Liu,Yueqiu Sun,Xiangzhi Wang,Weimin Huang,Yan Zhang
Titanium has been applied to implants over the last decades due to its excellent biocompatibility and mechanical properties. However, there are still some drawbacks for titanium and its alloys to overcome. Thus, in this study, a novel electrochemical synthesis process has been developed to fabricate TiO2 nanotube array, hydroxyapatite and rare-earth (La3+) doped ZIF-8 nanoparticle composite coating, which can enhance the antibacterial and anti-corrosion property on the premise of minimizing the biocompatibility loss of titanium implants. Compared with traditional processing methods, electrochemical machining is more time-saving, energy-saving and environment-friendly. Thus, it provides an alternative way to produce medical implants.
✓ 已验证
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2021
·Vol. 38
·期 2
·442-453
·
IF 3.309
Cui Yanhua,Yang Lili,Yan Yan,Wang Zengkai,Zheng Jian,Li Binrong,Feng Yonghai,Li Chunxiang,Meng Minjia
The photocatalytic efficiency of conventional blending photocatalytic membranes suffers a significant reduction due to effective photocatalyst embedded in membrane matrix. Therefore, in this study, inspired by the bioadhesive technology of polydopamine (pDA), a novel Ti doped bismuth oxyiodide (BiOI)-polydopamine (pDA)-coated cellulose acetate (CA) (Ti/BiOI-pDA/CA) photocatalytic nanocomposite membranes were successfully developed for effective removal of tetracycline (TC). The Ti/BiOI-pDA/CA nanocomposite membranes displayed very high photocatalytic activity toward TC (about 98% after 120 min) under visible light irradiation and superior photodegradation kinetics (k=0.03214 min −1 ). The removal rate of Ti/BiOI/-pDA/CA nanocomposite membranes under dynamic cyclic degradation system could be further improved, giving TC removal efficiency of 91% in 60min. Remarkably, the permeate flux, flux recovery ratio (FRR), reversible fouling (Rr), irreversible fouling (Rir) and the total fouling ratio (Rt) revealed the Ti/BiOI-pDA/CA nanocomposite membranes had excellent antifouling performance. In addition, the Ti/BiOI-pDA/CA nanocomposite membranes exhibited excellent stability and reusability. Therefore, this work gives insight into the effective removal of TC wastewater and has a great potential for new generation of high-performance photocatalytic membranes for practical wastewater treatment in the future.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）