CHEMOSPHERE
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2019
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IF 5.108
Kané Rabé,Lifen Liu,Noor Ahmed Nahyoon
Visible-light-driven photocatalytic Fuel Cell (PFC) is of great interest in the environmental pollutant remediation with energy recovering. Herein, enhancement in photocatalytic degradation of Tetracycline Hydrochloride (TC) with electricity generation was achieved in a single reactor of PFC with paired stainless-steel mesh electrode loaded with anodic g-C 3 N 4 /Fe 0 (1%)/TiO 2 and cathodic WO 3 catalyst (at various pH, 0.05 M Na 2 SO 4 , 10 Ω external resistance) with visible light and without light. With light, TC molecules were successfully removed (97.3% in 90 min, at initial and optimal pH 5), while generating 0.98 V cell voltage and 24 W m −2 power density, simultaneous removal of COD (chemical oxygen demand) and TOC (total organic carbon) was 91.3% and 95%, respectively, suggesting superior mineralization that can be explained by the excitation of the anodic triple component g-C 3 N 4 /Fe 0 (1%)/TiO 2. In contrast, without light, the removal of COD, TOC and the cell voltage were much lower (48.8%, 65.3%, 0.78 V). In dark, the fuel cell is self-driven and self-biased, forming potential gradient and degrading pollutants. The effects of solution pH, initial TC concentration on degradation and power generation were evaluated. This PFC degrading TC can maintain high photocatalytic activity and high power output capacity after 5 cycles with light. Without light, the electricity generation capacity was 50–70% that in visible light PFC. These features reveal that fuel cell with g-C 3 N 4 /Fe 0 (1%)/TiO 2 photo anode and WO 3 photocathode has great application potential for removing refractory pollutants from wastewater.
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高影响因子
LANGMUIR
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2014
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IF 4.384
Xun Ma,Xiuyuan Ni
We used the photoexcited TiO2 films to initiate the copolymerization of 3,4-ethylenedioxythiophene with pyrrole, aiming to develop an organic/inorganic heterojunction. Specular reflection infrared spectroscopy analysis was used to monitor the process of polymerization and indicated that the copolymers directly grew on the TiO2 substrate. Dissecting the copolymers with ultraviolet photoelectron spectroscopy revealed the evolution of the valence-band electronic structures. Moreover, the resulting copolymer/TiO2 heterojunctions were investigated using electrochemical impedence and X-ray photoelectron spectroscopy. The Al/poly(3,4-ethylenedioxythiophene-co-pyrrole)/TiO2/ITO heterojunction device that was prepared from the hybrid film exhibited a conspicuous rectification. The heterojunction device was also explored with respect to the conduction models.
研究领域:
材料科学
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高分子化学
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半导体物理
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纳米技术
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电化学
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·42970-42981
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IF 7.8
Ma Chaofan,Su Huiyu,Liu Zhongneng,Zhu Chaoqi,Yang Yazhou,Zeng Dawen
It is crucial to detect hydrogen (H 2 ) release from battery packs to provide early warning of battery thermal runaway. In this article, the hollow octahedral CuO x /TiO 2 were prepared using an efficient MOF template strategy, and nitrogen (N) -doped carbon (C) nanofibers embedded with CuO x /TiO 2 were designed by electrospinning, which were CuO x /TiO 2 @NCFs. The hollow heterojunctions (CuO x /TiO 2 ) formed based on MOF templates can reduce the recombination rate of carriers in TiO 2 , and DFT calculations reveal charge transfer occurring at the heterojunction, with a substantial migration of electrons from TiO 2 to CuO, significantly enhancing the ability of TiO 2 surface to adsorb H 2 . Simultaneously, the nanofibers composed of CuO x /TiO 2 and PAN contain substantial amounts of nitrogen and carbon. The introduced N atoms can activate the adjacent C atoms, the 3D framework constructed from N-doped C nanofibers exhibits extremely strong electron transport capability. At the optimal TiO 2 :PAN ratio of 4.0:1, the sensor achieves the response of 48% toward 10 ppm H 2 , and can detect as low as 20 ppb H 2 at room temperature, which is a potential competitive candidate for monitoring LIBs thermal runaway.
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Yizhi Zeng,Xianghong Ren
Unsymmetrical dimethylhydrazine (UDMH), as a high-energy liquid rocket fuel widely used for energy liquid rocket fuel, inevitably produces huge volumes of UDMH wastewater during use. As UDMH and its byproducts are both highly toxic, this poses a severe threat to ecological environment and human health, making it an urgent need to develop an efficient, environmentally friendly treatment for UDMH wastewater. Photocatalytic technology has emerged as a research hotspot in the field of water pollution control owing to its low cost and eco-friendliness. In this study, a (001) facet-dominated 001-TiO 2 /CeO 2 S-scheme heterojunction was constructed via a solvothermal-photoassisted method, effectively achieving primary carrier separation. Under simulated solar irradiation, this structure achieved a 98.7 % degradation efficiency for 100 mg/L UDMH wastewater within 140 min, with degradation rate constants 3.8 times and 5.5 times higher than those of 001-TiO 2 and P25, respectively. To address the challenge of recovering powdered photocatalysts, this study immobilized the nanopowders using a silver conductive adhesive, creating a two-dimensional conductor interface for electron transport and a nanoparticle structure for hole retention, thereby enabling secondary carrier separation. Under simulated solar irradiation, this immobilized structure achieved a 75.1 % degradation efficiency for 100 mg/L UDMH wastewater within 420 min. More importantly, it demonstrated excellent reusability and recyclability. This study provides a practical and feasible approach for the efficient degradation of UDMH wastewater.
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高影响因子
Biochar
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2023
·Vol. 5
·期 1
·1-20
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IF 12.7
Yang Bowen,Dai Jiawei,Zhao Yuan,Wang Zhanchao,Wu Jingwei,Ji Caiya,Zhang Yuhu,Pu Xiao
Biochar-coupled Fe 3 O 4 @SiO 2 /TiO 2 /g-C 3 N 4 composites were successfully constructed through simple sol–gel and calcination methods. The composites efficiently removed high-concentration toxic tetracycline (TC) by means of ·OH and · \({\rm O}_2^{-}\) , whose removal rate exhibited 91.88% during 3 h, and the degradation rate constant reached up to 0.0068 min −1 . The excellent performance can be attributed to the high specific surface area, enhanced visible light response, the introduction of magnetic nanoparticles and biochars expediting charge transfer, Z-scheme heterojunction enhancing the spatial separation of photo-generate carriers and, importantly extraordinary adsorption capacity of 147.96 mg g −1 . Moreover, the composites showed the most excellent efficiency under the calcination temperature of 450 ℃, and exhibited good stability with tolerance to a wide range of pH and anions. Interestingly, a synergistic photocatalytic effect was discovered in the TC/Cr(VI) combined pollution systems, resulting in significantly improved removal of Cr(VI). Besides, the photocatalytic mechanism and degradation path of tetracycline were also elucidated. All these findings suggested the as-synthesized catalyst was an excellent photocatalyst for removal of TC/Cr(VI)-contaminated water. Graphical Abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yunning Chen,Zhengkai Wu,Renquan Guan,Xueying Cheng,Qingkun Shang,Yingnan Sun
Improving the efficiency of photogenerated charge separation and transport is the primary goal of designing and constructing efficient composite photocatalysts. The matching of energy bands and the formation of chemical bond between the two components are very conducive to the separation and transmission of photogenerated charges. Herein, three perylene diimide derivatives (PDIs) are synthesized by introducing sulfonic acid group (PDI-SA) and benzenesulfonic acid (PDI-BSA) respectively into the amide bond and further chlorine bay-substituting (Cl-PDI-BSA). The good water solubility of Cl-PDI-BSA ensures its forms a stable chemical bond with TiO 2 through the sulfonic acid group in the single molecular state, coupled with the matching of energy band structure, TiO 2 @Cl-PDI-BSA exhibited excellent performance upon visible light photocatalytic degradation to phenol and trenbolone acetate (TBA). It can remove 100% of phenol in 15 min and 100% trenbolone acetate (TBA) in 30 min, which is 14.3 times that of TiO 2 . Combining to DFT calculation, Kelvin probe force microscope and EPR analysis prove that bay chlorine substitution has a greater impact on the energy band structure and electron cloud distribution of PDIs than N-sulfonation, thereby seriously affecting the transport of photogenerated carriers with TiO 2 .
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CERAMICS INTERNATIONAL
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2023
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IF 5.2
Linfeng Miao,Zhongli Ji,Xuetao Wang,Xiaolin Wu
The fibrous ceramic-based catalytic filter element (CFE) is a promising multifunctional material capable of simultaneously removing dust and NO x from hot gases. In this study, various calcination temperatures and titanium sols with different solid contents were used to prepare CFEs based on microwave drying, and their influences on the catalytic performance were experimentally investigated. The results showed that both the calcination temperature and the solid content of the titanium sol had important impacts on the catalytic activity. As the calcination temperature increased, the particle size, crystallite size , and average pore diameter of the loaded catalyst support (TiO 2 ) increased, while the specific surface area decreased, ultimately resulting in a decline in the catalytic activity. However, a suitable calcination temperature ranging from 300 to 400 °C was required to achieve a good combination between the catalyst and the fibrous ceramic and a relatively uniform mesoporous structure. Furthermore, the increase in the solid content gave rise to a corresponding increase in the TiO 2 loading amount, which increased the pressure drop and reaction surface area of the CFE. Excessive vanadium content caused by insufficient catalyst support induced side reactions of NH 3 oxidation under high-temperature conditions, thereby reducing catalytic activity. Therefore, the preferred calcination temperature and solid content were set at approximately 300–400 °C and 8 wt%, respectively. The final prepared CFE demonstrated superior catalytic performance and adaptable gas velocity properties.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Ximin Chen,Yingqing Zhan,Ao Sun,Qingying Feng,Wei Yang,Hongyu Dong,Yiwen Chen,Yujie Zhang
Membrane separation technology offers the unique advantages in oily wastewater treatment. However, the oily wastewater in petrochemical industry often contains oil emulsions and soluble organic pollutants, which pose great obstacles to membrane materials. Herein, to address the aforementioned challenges, a multifunctional fibrous composite membrane (FCM) was prepared by simple spraying of three-dimensional (3D) TiO 2 @crumpled graphene oxide (GO) core–shell sphere onto electrospun poly (arylene ether nitrile) (PEN) porous support. In the hierarchical skin layer of composite membrane, the TiO 2 nanoparticles were anchored onto 3D crumpled graphene oxide sphere surface assisted by the mussel-inspired dopamine coating, which further triggered the formation of chemical cross-linking networks and hydrogen bond interaction with tannic acid. Such rational design not only ensured the structure stability of the functional layer, but also achieved the extraordinary versatility and high separation efficiency compared the conventional two-dimensional GO stacked lamellar membranes. Due to the super-hydrophilicity/underwater hydrophobic feature, low oil adhesion, and well-regulated water channels, the GO@TiO 2 /PEN FCM exhibited superior permeance for various surfactant free (4830–5160 L·m −2 ·h −1 ) and stabilized oil-in-water emulsions (3142–3514 L·m −2 ·h −1 ) while keeping stable rejection rate over 99%. Moreover, the combination of TiO 2 nanoparticles and GO endowed the FCM with synergistically enhanced photocatalytic degradation performance for the soluble organics. Under visible light irradiation, the degradation rate of methylene blue (MeB) and crystal violet (CV) could reach 90.8% and 92.5% in 60 min, respectively. Therefore, combination of high permeability and efficient photocatalytic degradation of the soluble organics enable the fibrous composite membrane to realize the fast separation of multi-component pollutant-oil–water emulsion.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
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IF 4.889
Jie Liu,Jianhao Cui,Lei Chen,Jingjing Chen,Huidong Zheng,S. Ted Oyama
The conversion of terpinolene epoxide to terpinen-4-ol is a desirable chemical transformation for the production of a valuable intermediate. This paper describes a one-pot, two-step system for the reaction that uses a bifunctional Ni/TiO 2 -SiO 2 catalyst with isomerization and hydrogenation capabilities. The TiO 2 -SiO 2 serves to isomerize the starting epoxide. The Ni component works to hydrogenate the allylic double bond. The tandem system achieves a high 64% yield of terpinen-4-ol. X-ray diffraction analysis showed that TiO 2 -SiO 2 was a mixed binary oxide, and Fourier transform infrared spectroscopy of adsorbed pyridine suggested that acid sites were mainly Lewis acid sites. Electron microscopy showed that the Ni/TiO 2 -SiO 2 catalyst consisted of spherical particles comprising a titanosilicate phase with highly dispersed zero-valent Ni or anatase on the surface. Additionally, there was strong interaction between Ni and the TiO 2 -SiO 2 mixed oxides. Control kinetic experiments demonstrated that the tandem use of the catalysts was more effective than simultaneous operation.
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高影响因子
ELECTROCHIMICA ACTA
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2022
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IF 7.336
Siqi Zhang,Shuopan Dun,Xugeng Guo,Jinglai Zhang
Introducing upconversion nanoparticles (UCNPs) or fabricating TiO 2 hollow spheres (TiO 2 -HSs) are considered two feasible strategies to enhance the photovoltaic performance of dye-sensitized solar cells (DSSCs). However, studies investigating a combination of UCNPs and TiO 2 -HSs for the application in DSSCs are still scarce. In this contribution, NaYF 4 :Yb,Er@NaGdF 4 :Nd@SiO 2 UCNPs and TiO 2 -HSs were synthesized and respectively applied as upconversion layers and scattering layers on the TiO 2 photoanode of DSSCs. The influence of different doping ratios of UCNPs on cell performance was explored. The present results reveal that the DSSCs device based on conventional P25 photoanode films incorporating the UCNPs with 10% can achieve a photovoltaic efficiency of 6.65%, showing 29.63% enhancement in comparison to the device without UCNPs. When the TiO 2 -HSs are used as scattering layers above the P25 film, the DSSCs device obtains a higher photovoltaic efficiency of 6.97%. More importantly, combining the UCNPs and TiO 2 -HSs can further enhance the photoelectrical property of DSSCs, realizing an optimal efficiency of 8.17%. Such an improvement can be attributed to a synergistic mechanism arising from the upconversion effect of UCNPs and the light scattering effect of TiO 2 -HSs. This work opens a new way of preparing composite photoanode films to improve the photovoltaic performances of DSSCs.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Yanning Qu,Xinyang Li,Hengli Zhang,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
Multifunctional photocatalytic surfaces for pollutant degradation and antimicrobial application are often in high demand, however they confront many challenges in charge transfer and light capture ability. In this work, a sponge-like N,S-CQDs/Bi 2 MoO 6 @TiO 2 film was constructed via hydrothermal technique aiming to solve above problems. As a result, the ternary film showed enhanced photocatalytic efficiency under visible and near-infrared (NIR) light, in which 85.8% and 44.6% of ciprofloxacin (CIP) were degraded after 240 min irradiation with visible and NIR light, respectively. Moreover, the composite film effectively realized photocatalytic sterilization of gram-positive B. subtilis and gram-negative E. coli under visible light irradiation. The bacterial colony decreased significantly from 7.56-log to 1-log cfu/mL after adding the ternary film within 1.5 h. The enhanced photocatalytic efficiency was closely related to both introduction of surface-functional N,S-CQDs and the construction of N,S-CQDs/Bi 2 MoO 6 @TiO 2 Z-scheme system, in which the transfer efficiency of photoinduced carriers and the light absorption property were significantly improved. We consider that the N,S-CQDs/Bi 2 MoO 6 @TiO 2 film is promising for the degradation of refractory pollutants and antimicrobial application under visible/NIR light irradiation. The relatively convenient recycling property and excellent photocatalytic performance of the N,S-CQDs/Bi 2 MoO 6 @TiO 2 film are beneficial for industrial applications.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Liu Yang,Yingxue Wu,Hongyi Shu,Chuang Wang,Changetong Song,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Polymer-supported catalysts have attracted intensive research attentions due to easy handling, facile separation and outstanding recycling performance. Herein, a simple, efficient and universal strategy was developed to fabricate isocyanate-functionalized polymer microspheres bearing highly reactive surface isocyanate groups, which could serve as a versatile support for the immobilization of photocatalyst. Firstly, self-stabilized precipitation polymerization of maleimide, maleic anhydride and styrene was performed in the presence of divinyl benzene (crosslinker) to prepare imide-functionalized poly(styrene- co -maleimide- co -maleic anhydride) (PSMM) microspheres. By simply adjusting the solvent composition and monomer feed ratio, monodisperse PSMM particles with diameter in the range of 0.52–1.01 μm were successfully obtained, which were further modified with hexamethylene diisocyanate (HDI). As a proof-of-concept, TiO 2 nanoparticles were readily and covalently bound to the surface of HDI-functionalized PSMM (PSMM-HDI) particles through reaction with isocyanate groups, leading to the formation of PSMM-HDI supported TiO 2 (PSMM-HDI@TiO 2 ). Furthermore, anhydride groups on the surface of PSMM was hydrolyzed to endow PSMM-HDI@TiO 2 with better dispersibility and adsorption performance. The degradation of methylene blue under UV-light was performed to evaluate the photocatalytic performance of the resultant PSMM-HDI@TiO 2 . Compared with pristine TiO 2 , the PSMM-HDI@TiO 2 exhibited not only higher degradation efficiency, but also facile separation and better reusability.
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高影响因子
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