MATERIALS RESEARCH BULLETIN
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2023
·
IF 5.4
Song Wu,Junli Wang,Xuanbing Wang,Di Jiang,Jinlong Wei,Xiaoning Tong,Zhenwei Liu,Qingxiang Kong,Naixuan Zong,Ruidong Xu,Linjing Yang
s Ti-based PbO 2 electrodes must currently address the high overpotential and low corrosiveness of the anodic oxygen evolution reaction (OER) during zinc electrowinning. In this study, a composite electrode composed of Ti/TiH 2 /β-PbO 2 − Mn 3 O 4 @C (0.6 g L –1 ) was fabricated using Ti/TiH 2 generated by electrochemical reduction of Ti/TiO 2 prepared by laser ablation as an intermediate layer, co-deposited β-PbO 2 , and Mn 3 O 4 @C micro-flakes prepared by high-temperature pyrolysis-oxidation as the active layer. In a zinc electrowinning test solution (50 g L –1 ZnSO 4 mixed with 150 g L –1 H 2 SO 4 ), the oxygen evolution and corrosion behavior of the obtained Ti/TiH 2 /β-PbO 2 − Mn 3 O 4 @C composite anodes were systematically investigated. Ti/TiH 2 /β-PbO 2 − Mn 3 O 4 @C (0.6 g L –1 ) exhibited a low overpotential of 493 mV, a low Tafel slope of 73.6 mV dec −1 , a low i corr of 2.320 × 10 −5 A cm −2 and voltage stability of 1.65 V vs. RHE for up to 72 h in stability tests, with an overall performance outperformed most of the reported Ti-based PbO 2 electrode materials. The outstanding catalytic activity is primarily attributable to the low resistance and porous interlayer of TiH 2 nanosheets, which speeds up the rate of electron transfer. The addition of Mn 3 O 4 @C micro-flakes to the active layer enhances the composite electrode's OER performance and corrosion resistance.
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ACS Applied Nano Materials
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2023
·
IF 5.9
Songbo Wang,Yidan Wang,Jia Li,Shuang Guo,Chengzhen Meng,Lun Pan,Ji-Jun Zou,Yawei Shi,Lei Zhang,Zhen Yin,Na Tang
In order to address the current energy and environmental challenges, photoelectrochemical (PEC) water splitting has been widely studied, and the key point about the efficient PEC process is how to develop highly active photoanode catalysts. In this article, we report a two-step hydrothermal and electrodeposition approach to prepare a cobalt (oxy)hydroxide (CoOOH)-modified Ti-Fe2O3-In2O3 electrode by synergy of electron modulation and a heterojunction structure for promoting PEC water splitting. Under a bias of 1.23 V vs RHE, the optimized Ti-Fe2O3-In2O3/CoOOH photoanode demonstrated remarkable photocurrent density and hydrogen evolution rate as high as 1.33 mA cm–2 and 22.8 μmol cm–2 h–1, which was 5.11-fold and 5.14-fold that of bare α-Fe2O3, respectively. Characterization results indicate that Ti-doping will alter the electronic structure and improve the charge carrier density, whereas the construction of a heterojunction can realize the spatial separation of charge carriers. Meanwhile, the outer CoOOH ultrathin layer can provide a large amount of oxygen evolution reaction sites and promote the surface reaction. This work suggests that the PEC performance of Fe2O3-based photoanodes can be improved effectively by the synergy of electronic modulation and heterojunction construction.
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高影响因子
Micromachines
·
2023
·Vol. 14
·期 10
·1815
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IF 3.4
Qian-Kun Li,Yue Li,Yan-Jun Wang,Jin-Yong Qi,Yan Wang,Yao-Dong Liu,Xue-Qing Liu
Titanium dioxide photocatalysts can break down pollutants using natural light. They possess notable light stability, chemical stability, and catalytic effects, thus leading to extensive research worldwide. However, the limited light absorption range of titanium dioxide and their inefficiencies in generating and transporting photogenerated carriers hinder the enhancement of their photocatalytic performance. In this study, we employ a femtosecond laser composite processing method to create an Ag-TiO2nanoplate composite catalyst. This method doubles the catalytic efficiency compared with the structure processed solely with the femtosecond laser. The resulting Ag-TiO2nanoplate composite catalysts show significant promise for addressing environmental and energy challenges, including the photodegradation of organic pollutants.Keywords:femtosecond laser;hierarchical micro-/nanostructures;photocatalyst;titanium dioxide
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Wen Gao,Fangyuan Wang,Meilin Ou,Qianqian Wu,Lei Wang,Haonan Zhu,Yuanyuan Li,Ning Kong,Jianping Qiu,Shanshan Hu,Shuang Song
The presence of elevated levels of norfloxacin (NOR) in the aquatic environment presents a serious risk to both human health and environmental organisms due to its extremely toxic and persistent characteristics. Herein, a series of Fe/Ti bimetallic composites (NH 2 -MIL-53(Fe/Ti)) were prepared using a one-step hydrothermal method to assess their capability for NOR degradation and investigate degradation mechanisms. It was observed that the well-organized nanosheets interconnected to form chrysanthemum clusters contained a significant number of exposed edges and open pores, which facilitated the enrichment of NOR. Notably, the optimum NH 2 -MIL-53(Fe/Ti) (1.5:1) demonstrated excellent degradation performance for NOR under visible light, owing to an electronic interaction between Fe 3+ and Ti 4+ metal centers. Efficient NOR degradation by NH 2 -MIL-53(Fe/Ti) (1.5:1) was achieved at 84.6% after 120 min of irradiation. Furthermore, the NH 2 -MIL-53(Fe/Ti) (1.5:1) maintained excellent reusability and stability even after five cycles tests. Active species trapping experiments confirmed that the pivotal role of •O 2 − and h + in photodegradation of NOR pollutants. A plausible photocatalytic mechanism was suggested according to various performance characterization and experimental results. Defluorination and ring opening were the main degradation pathways. This work advanced our understanding of photogenerated carriers transfer and energy conversion in bimetallic MOFs . Additionally, a novel strategy was presented for visible light catalytic degradation of NOR, which were highly relevant for the field of environmental treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jie Xu,Hongji Li,Huimin Feng,Yuqin Ma,Dandan Wang,Jianwei Zhu
The removal of refractory organic contaminants in the environment is vital, but developing highly active catalysts with a simple synthesis process remains a challenge. Herein, NH 2 -MIL-125(Ti) (Ti-MOF) as a template, Ti 3+ -TiO x clusters of different quantities were embedded in the CdIn 2 S 4 nanosheets to construct Ti 3+ -TiO x /CdIn 2 S 4 (TiCIS) heterojunction by an in-situ self-assembly strategy, which had a hollow structure, strong visible light absorption, high separation rate of carriers, and more active sites. During the degradation experiment of Rhodamine B (RhB), TiCIS25 exhibited the best photocatalytic performance, and 98.0% of RhB was degraded within 60 min of visible irradiation. The intermediates in the RhB degradation and their ecotoxicity were analyzed, which revealed that RhB degradation was a detoxification process. The radical trapping experiments and electron spin resonance (ESR) tests indicated that e - , 1 O 2 , and ·O 2 - are the main active species for RhB degradation. Moreover, a possible photocatalytic mechanism was proposed based on electrochemical tests. The photodegradation performance of the as-prepared TiCIS catalyst under different reaction parameters (authentic water matrices, initial pH, coexisting anions, organic matter concentration, actual sunlight, reaction temperature, and multiple pollutants) and circulating experiments, as well as the photo-reduction process CO 2 , reflected that TiCIS25 possessed excellent practicability, cyclic stability, and universal applicability. Above all, TiCIS25 exhibited great potential in photocatalytic processes, and the work provided a feasible strategy for designing high-performance photocatalysts .
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2021
·
IF 5.302
Xiangzhao Zhang,Puhao Xu,Xinyue Wu,Xinyi Gui,Guiwu Liu,Mingfen Zhang,Haining Meng,Guanjun Qiao
The wetting of ZrB 2 ceramic by molten pure Cu, Cu-(20, 30, 40, 50 at.%)Ti alloys were performed by the sessile drop method under vacuum of ∼4 × 10 −4 Pa in the 1030−1070 °C temperature range. The wetting and interfacial behaviors of Cu-Ti/ZrB 2 systems were analyzed and discussed. Furthermore, the work of adhesion and electronic properties of the Cu(1 1 1)/ZrB 2 (0 0 0 1) and Ti(0 0 0 1)/ZrB 2 (0 0 0 1) atomic interfaces were quantitatively evaluated by first-principles method. The wettability is significantly improved with the Ti concentration or wetting temperature increasing as a result of the formation of (Ti) solid solution at interface. The calculated results show that the B-terminated ZrB 2 (0 0 0 1) surface is preferable to bond with Ti(0 0 0 1) surface, and the electronic structure reveals that the dominant interfacial bonding is the Ti-B ionic bond for the Ti/B-terminated ZrB 2 interface.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Wei Zhang,Wei Liu,Guoliang Li,Wei Du,Jianbo Lu,Jianguo Song,Qixia Yang,Xiangming Li,Huizhong Xu,Xu He,Jun Ma
The para arsanilic acid ( p -ASA) used as feed additive in the poultry and swine industries tends to transform into more toxic inorganic arsenic (As(V) and As(III)), leading to a greater risk to human health and environmental system. In this study, simultaneous adsorption and oxidation of p -ASA was achieved by a synthesized highly efficient nanostructured Fe-Ti-Mn composite oxide (FTMO), with a high specific surface area of 424.7 m 2 /g. The maximum adsorption capacity for p -ASA could be as high as 45.6 mg/g, meanwhile the combined oxidation/photo-oxidation processes led to the formation of intermediate containing hydrazine group, however, without release of toxic inorganic As(III) and As(V). The p -ASA adsorption by FTMO was verified as the chemisorption process with the formation of inner-sphere complexes at the solid/water interface, which was prominently influenced by solution pH, coexisting ions and humic acid, however relatively insensitive to ionic strength. The systematic characterization by FTIR, XPS, EPR and XANES revealed that Fe phase of FTMO played the dominant role for p -ASA adsorption, while Mn and Ti phases were responsible for the oxidation and photo-oxidation of p -ASA, respectively.
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高影响因子
Metals
·
2020
·Vol. 10
·期 12
·1574
·
IF 2.117
Ruochen Shen,Chaohui Pu,Xiaoou Xu,Youpeng Xu,Zhilin Li,Zhu Wu
The research aims to study the effect of adding mischmetal (Mm) to the TiFe0.86Mn0.07Co0.07alloy on its hydrogen storage performance and cyclic stability. The results show that TiFe0.86Mn0.07Co0.07+ x% Mm (x = 0,4,6,8) alloys can be easily activated. The hydrogen absorption capacity of TiFe0.86Mn0.07Co0.07+ 4% Mm reaches 1.76 wt% (mass fraction) at 298 K. With the increase of Mm addition, the hydrogen storage capacity decreases slightly. Furthermore, after 40 absorption and desorption cycles in hydrogen containing 250 ppm O2, the alloy still has 36% of its initial hydrogen storage capacity, and the alloy can recover 93% of its hydrogen storage capacity through heat treatment.Keywords:TiFe hydrogen storage alloys;life test;impure hydrogen gas;cyclic stability
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Meijuan Chen,Xiaoyan Wei,Liaoliao Zhao,Yu Huang,Shun-cheng Lee,Wingkei Ho,Kehao Chen
Highly efficient and stable photocatalysts were synthesized at room temperature by modifying MIL-125(Ti) with N-doped carbon quantum dots (N/CM(Ti)). The N/CM(Ti) with 2.5 vol % N doped carbon quantum dots (N/CQDs) had the best light absorption and visible-light photocatalytic nitrogen oxide (NO) removal efficiency (approximately 49%). It was found through X-ray photoelectron spectroscopy analysis that a N–Ti–O bond was formed in the 2.5 vol % N/CM(Ti), which is more conducive to charge transfer. Photocurrent and electrochemical impedance data also showed that the carrier separation efficiency of 2.5 vol % N/CM(Ti) was significantly superior to that of MIL-125(Ti). In addition, the TiIII–TiIV of MIL-125(Ti) acts as the active center for photocatalytic removal of NO. Two possible electron migration paths were proposed: electron transfer from N/CQDs to TiIII–TiIV center of MIL-125(Ti) due to the photoinduced electron transfer property of N/CQDs, and absorption of UV light generated from the N/CQDs by the terephthalic acid ligand followed by electron transfer to metal active sites for photocatalytic removal of NO.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2021
·Vol. 168
·期 10
·106510
·
IF 4.316
Yijing Xia,Yan Yan,Lingbing Hu,Qizhou Dai,Xiangjuan Ma,Juqing Lou,Yi Xia
This study focused on the enhanced mechanism of electrochemical degradation of antibiotic norfloxacin (NOR) using a self-made Ti/SnO2-Sb2O3/α,β-Co-PbO2 electrode. The electrode characterization, reaction mechanism, degradation performance, and toxicity assessment were studied. In contrast to the conventional Ti/SnO2-Sb2O3/α,β-PbO2 electrode, our prepared Co-doped PbO2 electrode showed the characteristics of more compact surface, smaller crystal size, higher oxygen evolution potential (OEP) and an increased yield of ·OH concentration. The application of Co-doped PbO2 electrode for the electrochemical oxidation of NOR was systematically analyzed. The optimal operating parameters were found to be Na2SO4 concentration of 0.1 mol L−1, initial NOR concentration of 50 mg L−1, initial pH of 5 and current density of 20 mA cm−2. Under these conditions, NOR, chemical oxygen demand (COD) and total organic carbon (TOC) removals reached 85.29%, 43.65% and 41.89% after 60 min of electrolysis, respectively. Through the intermediates detected during the electrochemical treatment process, a reaction pathway involving decarboxylation, defluorination and piperazine ring-opening was proposed. Finally, the toxicity assessment of the treated NOR solution towards Vibrio fischeri rapidly fell to non-toxicity and even reached to negative values after 50 min of electrolysis, indicating that electrochemical oxidation of NOR is an effective approach to reduce its toxicity to environmental ecosystem.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Lin He,Yimin Gao,Yefei Li,Zhiwei Liu,Weiyao Zhang,Guangcan Zhou,Hongying He,Siyong Zhao,Honggang Liu,Wentao Yan
Ti(C,N)-304ss cermets with various rare earth yttrium addition were fabricated via powder metallurgy . Fe and Cr atoms dissolved into Ti(C,N) grains and formed a core-rim structure. The first-principle method was employed to calculate the lattice parameters and elastic modulus of the solid solution. The formation of solid solution not only reduced the lattice misfit between the binder phase and hard phase but also improved the hardness of hard phase. The in-situ formed nano-Y 2 O 3 particles existed at the center of Ti(C,N) grains acting as ‘mid effect’ heteromorphic nuclei. The microstructure of cermets was refined with Y addition and the abnormal growth of hard phase was suppressed. The mechanical properties were also improved with Y addition. When the Y content reached 0.3 wt%, the optimal mechanical properties were obtained with a TRS value of 1527 MPa and a hardness value of 91.7 HRA.
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高影响因子
POLYMER SCIENCE SERIES B
·
2019
·Vol. 61
·期 2
·124-131
·
IF 0.907
Guanghong Lin,Xiang Hongping,Xi Lu,Wen Zhixia,Wang Zhaowei,Yu Junwei,Liu Xiaoxuan
Abstract A tricomponent catalyst comprising titanium tetrachloride, triisobutyl aluminum and diphenyl ether is developed for the highly cis -1,4-selective polymerization of isoprene. The influence of the content of diphenyl ether and its complexation order on polymerization, microstructure and performance of polyisoprene are studied. The polyisoprene synthesized presents high monomer conversion (91–99%). With the increasing of diphenyl ether content, intrinsic viscosity and viscosity-average molecular weight of polyisoprene increase. The molar percentage of cis -1,4-unit is almost unaffected by diphenyl ether and different complexation sequence. The polyisoprene reveals comparable T g (–61.31°C) and mechanical strengths (11.14 MPa, 667%) to commercially available LHIR-80 synthesized with neodymium. However, the viscosity and viscosity-average molecular weight of the former are lower than that of the latter, which avails the processability and maintains excellent mechanical properties.
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危险品化学品经营许可证（带存储）