Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yiwei Huang,Kunyu Chen,Meina Huang,Renjie Bi,Zhen Li,Yanqiu Zhu,Ming Tang,Zhangfa Tong,Yuanbo Ye,Meiping Zhu
Developing visible-light-responsive TiO 2 -based photocatalysts provides a promising avenue for addressing VOCs pollution. Herein, polydopamine (PDA) template pyrolysis waste was in-situ up-cycled for simultaneous growth of N and C co-doped hollow porous TiO 2 microreactors (H-NT-0.2) in air. The resulting H-NT-0.2 with a highly intact hollow structure, thin spherical shell (∼ 13 nm) and high porosity possesses the highest N and C co-doping ratio and largest oxygen vacancies (OVs) amount, leading to the highest concentration of reactive oxygen species (ROS) among all H-NT- x . A crucial role of OVs in enhancing H 2 O adsorption for the generation of hydroxyl radicals (⋅OH) has been revealed by DFT calculations. As a result, H-NT-0.2 shows the highest photocatalytic oxidation (PCO) efficiency of flowing acetaldehyde gas (90%) under visible light irradiation, which exceeds 3.5 times of commercial TiO 2 (P25)), and outperforms most of the reported photocatalysts. The growth mechanism, as well as the photocatalytic reaction pathways, were analyzed based on TG-MS and in-situ DRIFTS results, respectively. This work provides an economical, green and feasible strategy to develop advanced visible-light-responsive photocatalysts for aldehydes VOCs abatement in practical applications.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Gang Tian,Jingyu Lin,Yu Zhou,Ziyu Huang,Xiaoping Wei,Jianping Li
A novel extended-gate field-effect transistor based molecularly imprinted polymer photoelectrochemical (EGFET-MIP-PEC) sensor was constructed for the detection of neomycin in meat samples. Bi 2 O 3 /TiO 2 NTs heterojunction materials were synthesized by anodic oxidation and electrodeposition. With neomycin as the template and 3-aminophenylboronic acid as the functional monomer, a molecularly imprinted film was prepared on the Bi 2 O 3 /TiO 2 NTs electrode by electropolymerization. The MIP/Bi 2 O 3 /TiO 2 NTs electrode was connected to an extended-gate field-effect transistor. Under the irradiation of xenon lamp simulated visible light, the holes generated on the MIP/Bi 2 O 3 /TiO 2 NTs electrodes oxidize the neomycin adsorbed by the molecularly imprinted film, generating a photovoltage, which causes the gate voltage of the extended-gate field-effect transistor to change, thereby increasing the source-drain current. The sensor showed good linearity with the source-drain current in the neomycin concentration range of 5.0 × 10 −13 –5.0 × 10 −8 mol L −1 , with a detection limit of 1.0 × 10 −13 mol L −1 (3σ/S). Owing to the amplification of EGFET on photoelectrochemical signal produced by the Bi 2 O 3 /TiO 2 NTs heterojunction with high photoelectric conversion efficiency and wider wavelength range of optical response, the sensitivity of the sensor was significantly improved. The selectivity of the sensor was remarkably enhanced due to the MIP film.
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FOOD CHEMISTRY
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2022
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IF 9.231
Wei Zhong,Jin Zou,Qi Yu,Yansha Gao,Fengli Qu,Shuwu Liu,Hui Zhou,Limin Lu
The development of effective electrochemical methods for the determination of pesticide residues is highly desirable for food safety requirements. Herein, a novel electrochemical sensing strategy for indirect detection of thiabendazole (TBZ) was achieved by monitoring the anodic stripping peak signal change of media Cu 2+ induced by a significant activity difference between active Cu 2+ and inactive Cu 2+ -TBZ complexes. In this sensing system, a heterostructured Ti 3 C 2 T x -TiO 2 composite synthesized via a simple in-situ-oxidization strategy is used as the electrode material to boost the anodic stripping peak signal. After optimizing various conditions, the developed sensor presents satisfactory analytical performance for TBZ assay with a linear range from 0.3 to 100.0 nM and a limit of detection as low as 0.1 nM (S/N = 3). Furthermore, the proposed sensing platform also exhibits outstanding anti-interference, repeatability, and stability, which is effective for the determination of TBZ in fruit and water samples.
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高影响因子
Materials
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2022
·Vol. 15
·期 17
·5962
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IF 3.748
Bo Chen,Yu Liang,Yunjia Song,Yunkai Liang,Jian Jiao,Hong Bai,Ying Li
Host immune response has gradually been accepted as a critical factor in achieving successful implant osseointegration. The aim of this study is to create a favorable immune microenvironment by the dominant release of IL-4 during the initial few days after implant insertion to mitigate early inflammatory reactions and facilitate osseointegration. Herein, the B-TNT/PDA/IL-4 substrate was established by immobilizing an interleukin-4 (IL-4)/polydopamine (PDA) coating on a black TiO2nanotube (B-TNT) surface, achieving on-demand IL-4 release under near infrared (NIR) irradiation. Gene Ontology (GO) enrichment analyses based on high-throughput DNA microarray data revealed that IL-4 addition inhibited osteoclast differentiation and function. Animal experiment results suggested that the B-TNT/PDA/IL-4+Laser substrate induced the least inflammatory, tartrate-resistant acid phosphatase, inducible nitric oxide synthase and the most CD163 positive cells, compared to the Ti group at 7 days post-implantation. In addition, 28 days post-implantation, micro-computed tomography results showed the highest bone volume/total volume, trabecular thickness, trabecular number and the lowest trabecular separation, while Hematoxylin-eosin and Masson-trichrome staining revealed the largest amount of new bone formation for the B-TNT/PDA/IL-4+Laser group. This study revealed the osteoimmunoregulatory function of the novel B-TNT/PDA/IL-4 surface by photothermal release of IL-4 at an early period post-implantation, thus paving a new way for dental implant surface modification.Keywords:photothermal;controlled release;IL-4;PDA;TiO2nanotubes;osseointegration;near-infrared laser;titanium
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Zhimin Xu,Zhaobin Zhang,Xingfu Zhou
Vertical-oriented Cs-doped rutile TiO 2 nanorod (Cs-TiO 2 NR) arrays were prepared without a seed layer through the hydrothermal method . One-dimension TiO 2 nanorod (TiO 2 NR) arrays not only provide a direct and fast channel for charge transfer but also increase the perovskite loading amount. Further research shows that the conduction band minimum of Cs-TiO 2 NRs increases from − 3.94 eV to − 3.86 eV when compared with the pristine TiO 2 NRs, which favors the positive band alignment at the ETL/perovskite interface and reduces the carrier recombination and energy loss. Furthermore, we simultaneously replaced the expensive and unstable organic hole transport layer and noble metal electrode with a carbon electrode for the purpose of reducing the cost of the PSCs . The study proves that Cs-TiO 2 NRs not only improve the energy level arrangement at the ETL/perovskite interface but also reduce the density of defect states at the interface and increase carrier lifetime. The hole-transport-material-free carbon-based all-inorganic FTO/Cs-TiO 2 NRs/CsPbI 2.25 Br 0.75 /C solar devices exhibited a high-power conversion efficiency (PCE) of 12.72%, showing a 16% increase in PCE when compared with the control device. This work opens the door to the preparation of high-efficiency hole-transport-material-free carbon-based all-inorganic PSCs via the energy level calibration engineering.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Ge Yang,Jinyan Xiong,Mengjie Lu,Weiming Wang,Wei Li,Zhipan Wen,Shaozhong Li,Weijie Li,Rong Chen,Gang Cheng
Photocatalytic CO 2 reduction into valuable fuel and chemical production has been regarded as a prospective strategy for tackling with the issues of the increasing of greenhouse gases and shortage of sustainable energy. A composite photocatalysis system employing a semiconductor enriched with oxygen vacancy and coupled with metallic cocatalyst can facilitate charge separation and transfer electrons . In this work, mesoporous TiO 2 and titanium-based perovskite oxides (BaTiO 3 and SrTiO 3 ) nanoparticle assembly incorporated with abundant oxygen vacancy and copper particles have been successfully synthesized for CO 2 photoreduction . As an example, the TiO 2 decorated with different amounts of Cu particles has an impact on photocatalytic CO 2 reduction into CH 4 and CO. Particularly, the optimal TiO 2 /Cu-0.1 exhibits nearly 13.5 times higher CH 4 yield (22.27 μmol g −1 h −1 ) than that of pristine TiO 2 (1.65 μmol g −1 h −1 ). The as-obtained BaTiO 3 /Cu-0.1 and SrTiO 3 /Cu-0.1 also show enhanced CH 4 yields towards photocatalytic CO 2 reduction compared with pristine ones. Based on the temperature programmed desorption (TPD) and photo/electrochemical measurements, the co-embedding of Cu particles and abundant oxygen vacancy into the titanium-based oxides could promote CO 2 adsorption capacity as well as separation and transfer of photoinduced electron-hole pairs, and finally result in efficient CO 2 photoreduction upon the TiO 2 /Cu, SrTiO 3 /Cu, and BaTiO 3 /Cu composites.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yanke Yu,Desheng Wei,Zhaojian Tong,Jinxiu Wang,Jinsheng Chen,Chi He
Ammonia (NH 3 ) is a critical component causing environmental problems like haze and water pollution. Selective catalytic oxidation of ammonia (NH 3 -SCO) to N 2 and H 2 O is a promising method to abate NH 3 emission. However, inferior SO 2 tolerance is still a tremendous challenge to be conquered for present NH 3 -SCO catalysts regarding practical applications. Application of materials which was difficult to be sulfated by SO 2 should be an effective way to solve this problem. Here, a ReO x -CuSO 4 /TiO 2 catalyst which coupled the advantages of ReO x (Rhenium oxides, supplying highly active adsorbed surface oxygen enhancing NH 3 -SCO reaction) and CuSO 4 (providing Brønsted acid sites inhibiting the formation of N 2 O) was rationally fabricated. Results indicated that ReO x -CuSO 4 /TiO 2 catalyst exhibited excellent catalytic performance in NH 3 -SCO with almost 100% of NH 3 oxidized at 300 °C (N 2 selectivity as high as 96%). Crucially, the composite catalyst exhibited incredible activity and stability under harsh reaction conditions toward SO 2 (600 ppm) and H 2 O (4.0 vol%) owing to the superior inhibition capability for SO 2 adsorption. In situ DRIFTS, in situ Raman and in situ XPS demonstrated that the NH 3 -SCO reaction over ReO x -CuSO 4 /TiO 2 catalyst mainly obeyed a N 2 H 4 reaction mechanism and oxidation–reduction circle between Re 7+ and Re 6+ played a vital role. Moreover, SO 2 would not affect this reaction mechanism on ReO x -CuSO 4 /TiO 2 catalyst. The knowledge and understanding reported could provide critical insights for the design and optimization of efficient materials for industrial NH 3 oxidative elimination.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yuan Deng,Ruoxi He,Huaiqian Lu,Yujing Guo,Qiang Wang,Yong Xiao,Chuan Dong,Lifang Fan
Here, a visible-light driven and efficient photoelectrochemical (PEC) aptasensor for highly sensitive and specific detection of di-2-ethylhexyl phthalate (DEHP) was constructed based on N-doped carbon quantum dots-decorated TiO 2 nanorods (N-CQDs-decorated TiO 2 NRs) subtly integrated with biocatalytic precipitation (BCP). The N-CQDs-decorated TiO 2 NRs synthesized through a facile hydrothermal method possess enhanced visible-light absorption capability and excellent PEC performance. The synthesized composites were used as the sensing material for developing a PEC aptasensor. Amino-functionalized complementary strand (cDNA) was first covalently immobilized on the N-CQDs-decorated TiO 2 NRs, and then horseradish peroxidase (HRP)-labeled aptamer molecules were introduced onto the surface of composites by hybridization with cDNA. HRP-induced biocatalytic precipitation (BCP) caused the decrease of PEC detection signal, playing a role of signal amplification. The proposed PEC aptasensor shows good detection performance for DEHP with high sensitivity, selectivity, stability and reproducibility, and the detection limit is as low as 0.017 ng/L. Moreover, satisfying results were achieved for the DEHP assays in real environmental samples using the proposed PEC aptasensor. Thus, this present method would contribute a fresh idea to monitor DEHP or other pollutants in the environment.
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JOURNAL OF THE ENERGY INSTITUTE
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2023
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IF 5.7
Lin Ai,Haonan Shi,Jixiang Chen
Herein, TiO 2 supported Ni–Re alloy catalysts (i.e., NiRe(x:y)/TiO 2 , x:y denotes the Ni/Re atomic ratio) were prepared and tested for in situ deoxygenation of methyl palmitate to hydrocarbons in aqueous phase using methanol as hydrogen donor. Raman spectra indicates that there is interaction between NiO and ReO 4 − species via forming Ni–O-Re(=O) 3 species in the calcined catalysts, which contributes to the formation of Ni–Re alloy and promotes the Ni dispersion during the reduction with H 2 . Particularly, the Ni–Re alloy particles with average size of ∼1.4 nm highly disperse on spherical TiO 2 particles (∼14 nm in diameter) in NiRe(3:4)/TiO 2 (the nominal Ni content of 3 wt %). XPS reveals a charge transfer from metallic Ni to Re in the Ni–Re alloy. In in situ deoxygenation of methyl palmitate, compared with Ni/TiO 2 , NiRe(x:y)/TiO 2 give remarkably higher deoxygenation activity and lower activity for the C–C bond hydrogenolysis , ascribed to the synergistic effect between Ni and Re species and the geometrical effect of Re, respectively, which are further verified by propanoic acid-TPD and TPSR. The yield of C 6 ∼C 16 liquid hydrocarbons can achieve as high as 98.0% on NiRe(3:4)/TiO 2 at 330 °C. There is no obvious sintering of Ni–Re alloy and support TiO 2 particles during the recycling of NiRe(3:4)/TiO 2 , while the carbon deposition and the leaching of Re species slightly reduce the catalyst activity.
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CHEMICAL ENGINEERING SCIENCE
·
2026
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IF 5.1
Xinyi Yu,Yinglu Liu,Jinze Li,Zhengtao Xu,Zhihao Zhang,Yuan Pu,Dan Wang
Uniform TiO 2 nanoparticles with low polydispersity index of 0.121. • Highly dispersed TiO 2 nanoparticles in epoxy resin with high refractive index. • Enhanced luminous flux of AlGaInP LED by 30.66% using nanocomposites encapsulant. Physical blending of high-refractive-index titanium dioxide (TiO 2 ) nanoparticles into optical resins offers a novel and efficient approach to prepare high-transparency and high-refractive-index optical materials, which are promising for light-emitting diode (LED) packing and advanced displays. Efficient synthesis and uniform dispersion of inorganic nanoparticles are crucial for their commercialization. In this work, methoxy triethyleneoxypropyl trimethoxysilane (MTE-TMS) modified TiO 2 nanoparticles with excellent dispersibility were synthesized using a high-gravity-assisted rotating packed bed (RPB) reactor. The as-prepared nanoparticles possess an extremely low polydispersity index (PDI) of 0.121 and are homogeneously dispersed in alicyclic epoxy resin, namely 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexane carboxylate (EEC). The resultant nanocomposite films exhibit tunable refractive indices ranging from 1.49 to 1.74, while the intrinsic refractive index of MTE-TMS-modified TiO 2 (named as M-TiO 2 ) nanoparticles is determined to reach up to 2.416. The intense mixing of RPB improves the grafting content of surface modifiers and reaction efficiency, thus achieving uniform coating on nanoparticle surfaces. With 50 wt% M-TiO 2 incorporated, the 200 μm-thick film retains transmittance over 85% in the visible region, accompanied by a haze of 0.45% and a refractive index of 1.74. The nanocomposites also possess better hardness, water resistance and thermal conductivity than pure EEC resin. When used for packaging AlGaInP-based (refractive index ≈3.0) LEDs, the materials boost the luminous flux of devices by 30.66%, showing bright prospects in high-refractive-index chip packaging.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Huan Yao,Ruifeng Zhang,Yu Wen,Yue Liu,Gang Yu,Zhi-Hui Xie
Metal-organic framework [MOF, i.e., NH 2 -MIL-53(Al)] modified TiO 2 (NMT) composite photoanodes were successfully prepared by hydrothermal synthesis and were used for the photoelectrochemical cathodic protection (PECCP) of nickel-plated magnesium alloy (Mg/Ni). Results showed that the synthesis temperature significantly impacted the morphology and PECCP performance of the NMT photoanodes. The NMT@150 photoanode prepared at a reaction temperature of 150 °C exhibited the best PECCP performance and produced a current density of 1980 μA cm −2 under visible light irradiation, which was 19.8 times higher than that of a single TiO 2 photoanode. The composite photoanode could polarize the open circuit potential of the coupled Mg/Ni electrode to -876 mV and remain relatively stable within 35 h. XPS and EPR tests showed that a Z -scheme heterojunction was formed between the NH 2 -MIL-53(Al) and TiO 2 nanotubes, allowing the photogenerated electrons to accumulate mainly on the conduction band of NH 2 -MIL-53(Al). The heterojunction greatly promoted the separation and transfer of photogenerated electron-hole in the NMT composite photoanode, significantly enhancing the PECCP performance for Mg/Ni.
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高影响因子
CHINESE CHEMICAL LETTERS
·
2023
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IF 9.1
Yifen He,Chao Qu,Na Ren,Dawei Liang
ABSTRACT Recently, a novel 2-electron oxygen reduction reaction (ORR) based electro-oxidation (EO) system was developed, which utilizes a H 2 O 2 generation cathode instead of H 2 evolution cathode. A Ti-based Ni-Sb co-doped SnO 2 (Ti/NATO) anode was selected for efficient degradation of refractory organics and O 3 production. The synergistic reaction of O 3 /H 2 O 2 further accelerated the generation of hydroxyl radicals ( • OH) in the ORR-EO system. However, the catalytic activity and long-term effectiveness of the Ti/NATO anode limited the large-scale application of the ORR-EO process. In this study, a blue TiO 2 nanotube array (blue-TiO 2 -NTA) inter-layer was introduced into the fabrication process between the Ti substrate and NATO catalyst layer. Compared to the Ti/NATO anode, the Ti/blue-TiO 2 -NTA/NATO anode achieved higher efficiency of organic removal and O 3 generation. Additionally, the accelerated lifetime of the Ti/blue-TiO 2 -NTA/NATO anode was increased by 7 times compared to the Ti/NATO anode. When combined with CNTs-C/PTFE air cathode in ORR-EO system, all anodic oxidation and O 3 /H 2 O 2 processes achieved higher • OH production. Over 92% of TOC in leachate bio-effluent was effectively eliminated with a relatively low energy cost of 45 kWh/t.
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危险品化学品经营许可证（带存储）