CHEMOSPHERE
·
2019
·
IF 5.108
Tong Zhang,Fan-xin Kong,Xi-chen Li,Qian Liu,Jin-fu Chen,Chun-mei Guo
Polysulfone ultrafiltration (UF) and polypiperazine-amide nanofiltration (NF) membranes were first fabricated by phase inversion and interfacial polymerization, and then modified by the commonly used TiO 2 on the membrane surface, respectively. Compared with the pristine UF and NF membranes, pure water flux decreased by 40.66% for modified UF membrane and 12.92% for modified NF membrane, while the contact angle of the modified membranes decreased from 66.5° to 35.3° for UF membrane and from 48.2° to37.7° for NF membrane. However, the membrane modified by TiO 2 nanoparticles for both UF and NF membranes exhibited much better anti-fouling and separation performance for two types of oil-in-water emulsions with different droplet size (i.e., prepared oil-in-water emulsion with low salinity and oil produced water in Shengli oilfield, China). It was obvious that water flux of modified UF only slightly decreased and the stable water flux was 2.2 times and 15.6% higher than that of pristine membranes for the prepared oil-in-water emulsion and produced water, respectively. According to the five fouling models for UF, the TiO 2 modified UF membrane could alleviate the fouling on membrane surface and greatly increase water flux by reducing the adsorption, deposition, blockage of membrane pores and formation of cake layer for two types of oil-in-water emulsion. For NF, water flux of the modified membrane increased by 66.1% and 22.8% for prepared oil-in-water emulsion and produced water, respectively. TiO 2 coating effectively alleviated the oil adhesion and cake layer formation on the membrane surface.
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DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Yan Li,Guangyu Chen,Jie Lin,Liuqing Huang,Chentong Zhang,Xuetao Luo
TC4 (Ti–6Al–4V) nanoparticles (TC4NPs) and silicon nanoparticles (SiNPs) with a median size of 146 and 51 nm were prepared by sand milling from scrap produced by refining silicon and TC4. The SiNPs and TC4NPs are mixed, carbonized, and leached in different proportions to obtain Si@C/TiO2@C/Hollow-C anode materials. The special structure of the anode materials provided more space for the volume expansion of silicon. The anatase TiO2 in TC4NPs relieves the volume expansion and reduces the transfer impedance, and the lithiated TiO2 can promote the electrical conductivity of the Si@C/TiO2@C/Hollow-C anode during the charge/discharge process. Furthermore, the Si@C/TiO2@C/Hollow-C (SiNPs/TC4NPs = 2:1) electrode delivers excellent rate performance; after cycling at a series of higher current densities, 92% of the original level of the reversible capacity can be maintained. The Si@C/TiO2@C/Hollow-C (SiNPs/TC4NPs = 2:1) anode retains 558 mA h·g–1 after 400 cycles with a large current density of 1000 mA·g–1. The synthesis method of the Si@C/TiO2@C/Hollow-C anode is a low-cost, facile, and nontoxic process, endowing it with the potential for application as energy materials for mass production.
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DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 6
·065515
·
IF 1.449
Xialin Peng,Yonggang Zhang,Ying Liu
Noble metal Ag nanoparticles were deposited on Ag3PO4/P25 heterojunction structure by ultraviolet (UV) light induction to construct Ag/Ag3PO4/P25 double heterojunction catalyst for efficient decomposition of phenacetin (PNT). X-Ray Diffraction (XRD), x-ray photoelectron spectroscopy (XPS), Raman and photoluminescence (PL) spectroscopy analyses were employed to evaluate the microstructure, chemical structure and photocatalytic activity of synthesized catalyst materials. PL spectroscopy analyses revealed that a considerable enhancement in photochemistry activity of Ag3PO4/P25 due to the deposition of Ag. The effects of Ag3PO4 mass ratios, operating conditions on PNT degradation and catalyst stability were also investigated. Results showed that Ag/10% Ag3PO4/P25 under the operating conditions of catalysts concentration of 0.5 g L−1 and pH of 9.0 with UV light irradiation displayed a better photocatalysis degradation performance. When the concentration of PNT was 20 mg L−1, the removal rate of PNT and TOC obtained from Ag/Ag3PO4/P25 system were up to 97 % and 83%, respectively. The removal rate of PNT drops from 97% to 85% between the first and last cycles after 60-min conversion. Ag/Ag3PO4/P25 with a high catalytic reaction efficiency was ascribed to the deposition of Ag. Ag is an electron acceptor and Ag3PO4 have excellent electron conductivity in a heterostructure, the novel Ag/Ag3PO4/P25 composite catalyst could reduce the recombination rate of electron-hole pairs and prolong the lifetime of photogenerated electrons.
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高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Hualin Jiang,Jun Liu,Menglin Li,Lei Tian,Gongsheng Ding,Pinghua Chen,Xubiao Luo
Lattice-doping and surface decoration are prospective routes to improve the visible-light photocatalytic ability of TiO 2 , but the two techniques are difficult to combine into one preparation process because they are usually conducted under different conditions, which limits the efficiency of TiO 2 modification. In this study, TiO 2 was successfully modified by simultaneous lattice-doping and surface decoration, and the visible-light photocatalytic capacity was largely improved. Upon comparing the method reported here with previous ones, the most significant difference is that Fe(II)-phenanthroline was first used as the co-precursor of the introduced elements of C, N, and Fe. These three elements were simultaneously introduced to TiO 2 at high levels by this co-precursor method. The as-synthesized photocatalysts were systemically investigated and analyzed by several characterization methods such as XRD , FT-IR, XPS , Raman spectroscopy , EPR , UV-Vis DRS, photoluminescence spectra, photocurrent , electrochemical impedance spectra, TEM, and HRTEM . The photocatalytic degradation of 4-NP under visible-light irradiation was used to evaluate the photocatalytic activity of the photocatalysts. Based on the experimental data, a probable mechanism for the photocatalytic degradation by the photocatalysts is proposed. This is a novel method of using one source to simultaneously introduce metal and non-metal elements to TiO 2 at high levels, which may provide a new way to prepare highly effective TiO 2 photocatalysts.
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高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Esimoneze Emmanuel Chinedu,Dilong Qiang,Xueqian Wu,Wei Liu,Haizhou Cao,Zhaolian Ye,Zhen Li,Songjian Zhao
The Pt-based catalyst for purifying chlorinated volatile organic compounds (Cl-VOCs) has the advantages of high catalytic efficiency and low ignition temperature, but the problem of poor resistance to chlorine and water poisoning has not been effectively solved. A series of 0.5 Pt-Ti catalysts were prepared for chlorobenzene (CB) catalytic oxidation by adjusting the interfacial stability and dispersibility of the TiO 2 and Pt through the organic acid strategy in this study. The introduction of tartaric acid (TA) effectively enhanced the surface reduction performance of 0.5Pt-Ti-TA and the proportion of Pt 4+ on the surface. In addition, TA can strongly coordinate with Ti center to form stable titanium-containing complexes, improve the dispersion of Pt, prevent particles from agglomerating, and make the distribution of active sites more uniform. The designed 0.5Pt-Ti-TA exhibits excellent chlorine and water resistance at 300℃ (5 %H 2 O, 500 ppm CB), and has a higher potential of application.
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产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Jiye Jia,Shijie Chen,Haifeng Tian,Dong Wang,Feng Yang,Pei Feng,Cijun Shuai
The low photogenerated charge carriers and quick complex annihilation of titanium dioxide (TiO 2 )/rGO composite leading to an unsatisfactory photocatalysis antibacterial effect limit its application in the bone scaffold. Herein, graphitic carbon nitride (g-C 3 N 4 ) was assembled with TiO 2 /rGO via a solvothermal method for enhancing the photocatalysis antibacterial properties of poly (lactic acid) (PLLA) bone scaffold prepared via selective laser sintering. The results revealed that g-C 3 N 4 expanded the light absorption range of TiO 2 /rGO from blue-violet light to visible light, resulting in the composites having a narrower band gap and producing more photoinduced charge carriers. More importantly, an S-scheme heterojunction was formed between g-C 3 N 4 and TiO 2 , which promoted the recombination of the electrons in the conduction band of TiO 2 and the holes in the valence band of g-C 3 N 4 . Meanwhile, rGO with excellent electrical conductivity reduced the interfacial charge transfer resistance and enhanced charge transfer efficiency, thus further avoiding the recombination rate of electrons and holes, whether TiO 2 or g-C 3 N 4 , and enhancing the photocatalytic properties. Consequently, the holes in the valence band of TiO 2 and the electrons in the conduction band of g-C 3 N 4 possessed high oxidation and reduction capacity, which oxidized H 2 O and reduced O 2 in the microenvironment, respectively, and generated lots of reactive oxygen species. In vitro antibacterial experiments indicated that the PLLA/TiO 2 /g-C 3 N 4 /rGO scaffold showed a better antibacterial effect, with the bacteriostasis rates of E. coli and S. aureus being 99.1% and 98.9%, respectively. In addition, cell adhesion and fluorescence results indicated that the scaffold had good biocompatibility and could provide a suitable microenvironment for the growth and proliferation of cells.
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产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 8
·759
·
IF 4
Wenbin Qu,Bountheva Louangsouphom,Xiaoling Ye,Huimei Liu,Xin Wang
Integrating photocatalysis with adsorption represents an efficient approach to improving the removal performance of organic contaminants from aqueous environments. To address the issues of severe charge recombination and poor adsorption activity in TiO2photocatalysts during the photocatalytic degradation of organic pollutants. In this study, we used macroporous resin as a carrier and prepared La/N-doped TiO2/macroporous resin composite materials (La/N/TiO2-MAR) via a hydrothermal-assisted sol–gel method. The results show that the composite material has a spherical morphology. N can be doped into the TiO2crystal, while La3+remains on the surface of TiO2without entering the crystal lattice. La/N/TiO2-MAR demonstrates a higher specific surface area and enhanced light absorption capacity, which facilitates both adsorption and photocatalytic degradation. At the La3+doping concentration of 0.05 M, La0.05/N/TiO2-MAR demonstrates optimal photocatalytic degradation performance, achieving an 85.36% removal rate of Rhodamine B after 240 min of visible-light exposure.
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产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Ling Chen,Penghui Nie,LiYang Yao,YiZhou Tang,Wuding Hong,Wenting Liu,Fen Fu,Hengyi Xu
The effect of one of the most widely studied nanomaterials at present, TiO 2 nanoparticles (NPs), on pregnancy-related diseases is not clear. In this study, the adverse effects of TiO 2 NPs on mice with gestational diabetes mellitus (GDM) and their possible mechanism were investigated. GDM mice were orally administered 0, 10, 50 and 250 mg/kg TiO 2 NPs for 14 days. GDM reduced the weight of pregnant mice, destroyed the placental structure and caused abnormal fetal development. After exposure to increasing doses of TiO 2 NPs, blood glucose levels increased significantly and body weight further decreased in GDM mice. The accumulation of the Ti content was detected in the placenta and fetus, which may further damage the placental structure in GDM mice, thereby exacerbating abnormal fetal development. In addition, the MDA and SOD activities were obviously increased, and the expression of genes associated with endoplasmic reticulum stress (ERS) ( PERK, eIF2α, AFT4, IRE1α , and XBP1s ) and apoptosis ( CHOP, JNK, Bax/Bcl-2, Caspase-12, Caspase-9, and Caspase-3 ) were also obviously increased in the placenta, which reflected the possible activation of apoptosis. It could be speculated that the reproductive toxicity of TiO 2 NPs in GDM mice triggered oxidative stress that subsequently activated ERS pathways to induce cell apoptosis.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Wenxiang Zhou,Qinming Wang,Jinlin Wan,Xingfu Zhou
The modification of the interface represents a crucial step in the preparation of efficient and stable carbon-based perovskite solar cells(C–PSCs). A multifunctional interfacial material 1-phenylguanidine hydrochloride (PGCl) was introduced between the double electron transport layer of TiO 2 /SnO 2 and perovskite to modify the interface and promote the crystal growth. The Cl - in PGCl can passivate oxygen vacancies and chemically link to ETL through electrostatic coupling , while helping to fix PbI 2 in perovskite. The grain size increase while the surface roughness decreases in the PGCl-modified ETL. The internal electric field attribute to the increase of the open-circuit voltage. The method achieves better energy orientation, fewer interface defects and uniform perovskite crystals, achieving an impressive power conversion efficiency (PCE) of 15.52 %, an open circuit voltage of 0.94 V, and a substantial increase in the fill factor to 77.96 %. The C-PSC based on PGCl modification show 15.4% increase in PCE. More importantly, the initial PCE of the unpackaged device remains at 75.4% after aging for 300 h at 45-50 °C and 60-70% relative humidity . The findings indicate that the incorporation of PGCl represents a promising approach to modifying the perovskite interface and regulating the crystallization of perovskite, with the objective of achieving efficient and stable C–PSCs.
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Ya-Ping Que,Jian Weng,Lin-Hua Hu,Ji-Huai Wu,Song-Yuan Dai
The morphology, microstructure and crystallography of titanium dioxide (TiO 2 ) have great effect on the photoelectric performance of dye-sensitized solar cells (DSSCs). Herein, flower-like 3D TiO 2 microstructures based on well-defined high-crystalline nanosheets are synthesized through a facile hydrothermal method . Especially, morphological evolution process and mechanism of this hierarchical structure are investigated. Due to the highly crystalline nature and smaller surface area of these nanosheets , the corresponding device shows an extremely high open-current voltage up to 0.84 V, which results from the less electron recombination. When applied as a scattering layer on top of the nanoparticle layer, the power conversion efficiency (PCE) can be significantly improved and give birth to a PCE value of 9.6%, which is 24.6% higher than that of an analogous device using nanoparticles (NP) (7.7%). As reflected by diffusion reflection spectra, intensity of the modulated photocurrent/photovoltage spectroscopy (IMPS/IMVS) and electrochemical impedance spectra (EIS), this hierarchical structure can not only enhance light harvesting, but also reduce electron recombination, facilitate electron transport and improve electron collection efficiency.
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DOI
高影响因子
CATALYSIS TODAY
·
2015
·
IF 3.893
Yanjie Wang,Yanjie Zhang,Fuhai Yu,Changzi Jin,Xin Liu,Jingyuan Ma,Yu Wang,Yuying Huang,Junhu Wang
Rutile Sn-Fe-TiO 2 photocatalysts with high visible-light-driven activity were synthesized by an improved soft chemical solution process for investigating the potential correlation between their photocatalytic performance and coordination structure. The prepared photocatalysts were systematically characterized by XRD, BET, Raman, TEM, UV–vis, XPS, XAFS and Mössbauer techniques. Their photocatalytic performances were evaluated by degrading the model pollutant of methylene blue aqueous solution under visible light irradiation ( λ ≥ 400 nm). The results indicated that tin and iron ions could substitute Ti 4+ in the rutile TiO 2 lattice, and specially, iron ions were located at tetrahedrally coordinated titanium sites. Their visible-light-driven photocatalytic activities were found to culminate at a very low level of iron doping (Fe/Ti = ∼0.1 at.%, Sn/Ti = 2.0 at.%), this was 5-fold of P25 and 2-fold of undoped rutile TiO 2 . It was confirmed that besides the high surface area, fine crystallinity, enhanced visible light absorption and optimized oxygen vacancy concentration, the mole ratio of tetrahedrally coordinated iron and titanium was also essential to modify their visible-light-driven photocatalytic properties.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 20
·12190-12197
·
IF 10.7
Fanqi Bu,Ali Wajid,Na Yang,Mengyue Gu,Xuewen Zhao,Lei Huang,Xin Ji,Shujiang Ding,Yonghong Cheng,Jinying Zhang
Magnesium hydrides are promising solid-state hydrogen storage materials due to their high gravimetric hydrogen storage density and low cost. However, the high temperature, slow kinetics, and poor cycle stability hinder the practical application of magnesium hydrides as hydrogen storage materials. Here, amorphous TiO2 was embedded into MgH2 particles as hydrogen conveying channels by atomic layer deposition followed by a ball-milling process to improve their hydrogen adsorption and desorption kinetics. The MgH2 particles embedded with amorphous TiO2 were then wrapped by graphene nanosheets (MgH2–20 nm TiO2@Gra) to enhance their cycle stability. The onset hydrogen desorption temperature of MgH2–20 nm TiO2@Gra has been reduced to 199 °C, which is about 100 °C lower than that of pristine MgH2 (290 °C). MgH2–20 nm TiO2@Gra has been demonstrated to rapidly release 6.04 wt% H2 at 275 °C in 10 min, where only 0.086 wt% H2 was released from pristine MgH2 at 300 °C in 10 min. MgH2–20 nm TiO2@Gra has been found to absorb 5.39 wt% H2 at a temperature as low as 50 °C (30 bar H2), where only 1.67 wt% H2 was absorbed by pristine dehydrogenated MgH2 at 200 °C in 20 min. Moreover, MgH2–20 nm TiO2@Gra has been demonstrated to still release 5.92 wt% of H2 after 50 cycles with a capacity retention of 95.5%. The multivalent Ti+ and abundant oxygen defects have been measured during different de/rehydrogenation states to explore the effects of amorphous TiO2 as hydrogen conveying channels. The amorphous TiO2 hydrogen channels with graphene wrappers have been demonstrated to be an effective strategy to enhance the hydrogen storage properties and cycle stability of MgH2, which is applicable for various solid-state hydrogen storage materials.
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高影响因子
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