Catalysis Science & Technology
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2024
·Vol. 14
·期 6
·1568-1578
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IF 4.4
Qifeng Chen,Peng Zheng,Haodi Liu,Yuanrong Zhang,Shuaitao Li,Hongpian Guo,Yanfen Fang,Xun Hu,Ran Duan
The combination of photocatalytic dehalogenation of halogenated aromatics and C–C coupling synthesis of valuable organics is an interesting method for the elimination of pollutants and synthesis of valuable chemicals. Herein, we present a green method for the photocatalytic dehalogenation of benzyl bromide and selective coupling synthesis of bibenzyl achieved on the dual active sites of single-atom Cu and surface oxygen vacancies (VOS) generated in situ on ultrathin 2D-TiO2(B) nanosheets. The experimental results show that single-atom Cu sites on ultrathin TiO2(B) nanosheets can improve charge transfer and separation efficiency and stabilize VOS formed in situ; the presence of VOS not only improves light absorption capacity but also favors the adsorption of reactant benzyl bromide molecules. More importantly, the dual sites of single-atom Cu and adjacent VOS form a solid frustrated Lewis pair, favor the adsorption of benzyl bromide molecules, activate the C–Br bond, and boost the C–C coupling synthesis of bibenzyl. This work provides a novel insight into photocatalytic C–C coupling through the synergistic effect of single-atom Cu and VOS on ultrathin nanosheet photocatalysts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Jingxuan Zhao,Hongxu Liu,Yuchao Qi,Ruijia Wang,Ziwei Lv,Yang Yu,Shulin Sun,Yiming Wang
In this work CS-SDAEM polymer brushes with long-chain structure were synthesized, and TiO 2 /CS-SDAEM nanoparticles were prepared by modifying them on the TiO 2 surface. The prepared modified membrane can effectively degrade dyes through photocatalysis and can reduce the contamination rate of the membrane during use. The separation membrane achieves efficient removal of contamination by self-cleaning. The results of the membrane surface analysis test show that the formation of coordination bonds between o-benzenetriol of GA and TiO 2 , and the chemical reaction between CS and GA, which promote the stability between coating components. The results of filtering tests show that with the excellent anti-fouling performance of long-chain polymer brush, the photodegradability of TiO 2 and a large number of hydrophilic groups contained in GA and CS, PVDF- TiO 2 /CS-SDAEM membranes overcome the above shortcomings and achieve super-hydrophilicity, anti-fouling and self-cleaning. In addition, DFT model simulations of photocatalytic processes show that there is a charge transfer between CS and TiO 2 , which increases the width of the high light absorption band and improves the efficiency of photodegradation. Modified membranes achieve efficient self-cleaning processes and low flux decline rates, which hold great promise for use in real wastewater application scenarios.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Huiyu Yang,Jinyi Zhou,Zijian Duan,Xin Liu,Bo Deng,Jian Fang,Weilin Xu
In this work, visible light total reflective SiO 2 @TiO 2 core-shell catalyst was synthesized by atomic layer deposition (ALD). This core-shell catalyst processing a total reflection character against full visible light favors the total effective traveling length of visible light inside the TiO 2 shell. Subsequently, higher catalyst temperature under visible light irradiation expands the light absorbing window of amorphous TiO 2 to full visible light due to its negative temperature coefficient of the forbidden bandwidth. Boosted photothermal conversion efficiency (145% that of amorphous TiO 2 ) can be achieved to exhibit a 17β-estrogen degradation rate 1.5 times that of the commercial P25 (a mixed TiO 2 crystal of 20% rutile and 80% anatase) and 2.9 times catalytic velocity that of P25. The boosted catalytic performance of SiO 2 @TiO 2 core-shell catalyst is attributed by expanded visible-light absorption, boosted photothermal conversion efficiency, and prolonged carrier lifetime.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Zhifeng Jiang,Deli Jiang,Zaoxue Yan,Dong Liu,Kun Qian,Jimin Xie
Novel TiO 2 –In 2 O 3 @g–C 3 N 4 hybrid system was synthesized by a facile solvothermal method. The photocatalytic activity of the TiO 2 –In 2 O 3 @g–C 3 N 4 hybrid material was evaluated via degradation of RhB and hydrogen-production. It could be found that TiO 2 –In 2 O 3 @g–C 3 N 4 ternary composites exhibit the highest RhB degradation rate, which was 6.6 times than that of pure g–C 3 N 4 . As expected, the H 2 -generation rate of the as-prepared ternary materials was found to increase by 48 times than that of pure g–C 3 N 4 . The enhanced activities were mainly attributed to the interfacial transfer of photogenerated electrons and holes among TiO 2 , In 2 O 3 and g–C 3 N 4 , leading to the effective charge separation on these semiconductors, which were evidenced by photoluminescence spectroscopy, electrochemical impedance spectroscopy and photocurrent analysis. The photocatalytic mechanism and photostability of the ternary hybrid materials were also proposed. This work may provide a stepping stone towards the design and practical application of multifunctional hybrids photocatalysts in the photocatalytic degradation of pollutions and hydrogen generation.
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Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Jiamin Li,Xiaoli Li,Guang Wu,Jiaqing Guo,Xiaohong Yin,Manman Mu
Visible light driven photocatalytic degradation of organic pollutants , such as bisphenol A (BPA) in wastewater, is considered as a promising strategy to solve the environmental issue . A two-dimensional (2D) porphyrin Co-TCPP MOF decorated 2D B-TiO 2−X nanosheet was successfully prepared through a facile hydrothermal method. The 2D–2D heterostructure could give rise to a built-in electric field to effectively promote the interfacial charge transfer and separation of photogenerated electron and holes. The presence of oxygen vacancy in the as-prepared heterostructure could greatly enhance the visible light harvesting ability to generate more photogenerated carriers. The Co-TCPP MOF@B-TiO 2−X exhibited remarkable photocatalytic performance for the degradation of BPA, whose degradation rate was up to 97% within 120 min irradiation. The degradation efficiency of this composite was 7.3 and 19.3 times higher than those of single Co-TCPP MOF and B-TiO 2−X respectively. The intimate contact between B-TiO 2−X and Co-TCPP MOF reduced interface resistance for charge migration, prolonged photoelectron lifetime and facilitated the charge carriers’ separation. The trapping tests verified that ·O 2 - was the mainly active species of BPA degradation. This strategy not only proves that the combination of B-TiO 2−X and Co-TCPP MOF is a feasible strategy to improve the photocatalytic degradation of BPA, but also provides some new inspirations for the construction of efficient 2D–2D composite photocatalysts.
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ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Ya Liu,Jiayi Hu,Huiqiong Huang,Xiaofang Yang,Xin Liu,Ning Lu,Shengchun Yang,Xiaodong Wen
Background Lead (Pb 2+ ) is a persistent and non-degradable pollutant that poses serious threats to human health and food safety. However, conventional methods are often limited by matrix interferences, sensitivity, and selectivity pose significant challenges for the direct quantification of trace metal ions in complex samples. Therefore, the development of efficient sample pretreatment techniques is necessary to address these limitations and enable reliable quantification of trace Pb 2+ in food and environmental samples. Results A novel method for the separation and enrichment of trace Pb 2+ in Angelica sinensis (Oliv.) Diels (AS) and water samples was developed, using a newly synthesized pH-responsive amorphous MIL-68(In)–NH 2 –TiO 2 (aMIL-68(In)–NH 2 –TiO 2 ) composite prepared with green deep eutectic solvents as a dispersive micro solid-phase extraction (DMSPE) adsorbent. At pH = 3, the composite showed excellent selectivity for Pb 2+ adsorption in multi-metal ion systems and achieves adsorption equilibrium within 3 min, providing a practical improvement over conventional extraction process and enhancing overall experimental efficiency. Under the optimized conditions, the method showed efficient extraction of Pb 2+ with an enrichment factor of 31, a limit of detection (LOD) of 0.1 μg L −1 , and a wide linear range (1–6000 μg L −1 ). Significance In this work, aMIL-68(In)–NH 2 –TiO 2 was prepared as a DMSPE adsorbent for the environmentally friendly, highly sensitive, and highly selective monitoring of trace Pb 2+ in AS and water samples, providing a novel strategy for the sensitive detection of metal ions, offering a promising approach for food and environmental monitoring.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xiang Qin,Tiantian Yi,Rong Cao,Junchen Luo,Hui Luo,Lijun Ji
The development of efficient S-scheme heterojunctions was crucial for addressing the limitations of insufficient light absorption and rapid charge recombination in photocatalysis. In this study, a dual-synergistic 0D/2D/0D (001)TiO 2 /Ti 3 C 2 /ZnTCPP S-scheme heterojunction was rationally designed. The matched energy levels between (001)TiO 2 and ZnTCPP metalloporphyrin drove the formation of a robust built-in electric field, serving as the endogenous S-scheme charge separation core that preserved strong redox capacity. Meanwhile, the metallic Ti 3 C 2 MXene acted as an exogenous high-conductivity transport bridge, accelerating directional carrier migration to surface active sites. The composite was successfully fabricated via a hydrothermal method combined with electrostatic self-assembly. Comprehensive characterization by XRD, TEM, and XPS confirmed that (001)TiO 2 nanoparticles and amorphous ZnTCPP were uniformly anchored onto Ti 3 C 2 nanosheets, forming intimate 0D/2D/0D interfacial contacts with strong electronic interactions. The incorporation of ZnTCPP significantly extended the optical absorption into the visible region, while Ti 3 C 2 functioned as an efficient electron mediator and photothermal agent, further boosting reaction kinetics. Under visible-light irradiation, the optimized TTZ-2 composite exhibited exceptional dual-functional performance: a tetracycline degradation rate of 93.4% and a hydrogen evolution rate of 590.2 μmol·g −1 ·h −1 . Mechanistic investigations, supported by Kelvin probe force microscopy (KPFM) and density functional theory (DFT) calculations, revealed that the dual synergy between the endogenous built-in electric field and the exogenous Ti 3 C 2 channel synergistically facilitated the directional migration of photogenerated carriers along the S-scheme pathway, effectively suppressing recombination while preserving strong redox capabilities. This work demonstrated a viable strategy for designing multifunctional MXene-based photocatalysts for environmental remediation and solar energy conversion.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
·
IF 3.5
Qingmao Yang,Anyan He,Junyan Tan,Weichen Zhao,Haoyi Wu,Shengning Luan,Wei Feng,Chun Shen
Developing a novel EPCS combining GOase with Au/TiO 2 . • Achieving ∼92.3% DFF yield with ∼97.0% selectivity within 2 h in pure water. • The by-product H 2 O 2 is in-situ decomposed into O 2 by Au/TiO 2 . • •OH, •O 2 – and O 2 precisely required for GOase activation generated by Au/TiO 2 . 2,5-Diformylfuran (DFF), as the oxidation product of the biomass platform molecule 5-hydroxymethylfurfural (HMF), has attracted considerable attention because of its broad utility as a precursor for pharmaceuticals, renewable polymers, and other functional products. Efficient oxidation of HMF into DFF through biocatalysis in pure water is extremely desirable but still faces significant challenges: complex multi-enzyme systems and low reaction efficiency. Herein, we develop a novel enzyme-photo-coupled catalytic system (EPCS) combining GOase with Au/TiO 2 photocatalyst, achieving “waste-to-wealth”. The mechanism study reveals that the Au/TiO 2 acts as the role of “killing two birds with one stone”: in-situ decomposing inhibitory H 2 O 2 by-product into O 2 and H 2 O, thereby mitigating enzyme inhibition; and ingeniously generating reactive oxygen species (ROS) (hydroxyl radicals (·OH) and superoxide radicals ( )) and regenerative O 2 that precisely are required for GOase activation. Under visible light conditions, the EPCS achieves (92.3±1.4)% DFF yield with (97.0±0.8)% selectivity within 2 h, significantly outperforming the single enzyme system (DFF yield: (40.9±2.4)%). The “green chemistry” concept is implemented in the EPCS, which provides a generalizable strategy for developing efficient, green, and concise oxidation systems by turning a toxic by-product into catalytic promoters. Download: Download high-res image (335KB) Download: Download full-size image
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FOOD CHEMISTRY
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2022
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IF 9.231
Yanli Zheng,Xiaoyu Jia,Zhiyong Zhao,Yalin Ran,Meijun Du,Haiyu Ji,Yanfang Pan,Ziqin Li,Xiaowei Ma,Yue Liu,Lihua Duan,Xihong Li
Poly (butylene adipate- co -terephthalate) (PBAT)/polylactic acid (PLA) blended with compatibilizers (polycaprolactone, PCL; poly (ethylene glycol), PEG; titanium dioxide, nano-TiO 2 ) ( [email protected] composites) were developed by melt processing. Natamycin incorporated into [email protected] blend composites formed [email protected] films, which exhibited high tensile strength (24.1–43.5 MPa) and elongation at break (85.8–258.2 %), and exhibited good oxygen permeability, water vapor permeability, surface hydrophobicity and biodegradability. The in vitro results revealed that inhibition of Penicillium expansum cell growth of the [email protected] films with addition of 1.0 wt% natamycin reached 95.72 %. The [email protected] film with natamycin effectively reduced incidence of decay (1.52 %) on grapes, maintained their quality, and inhibited the growth of pathogenic fungi to up to 0.42 log cfu·g −1 . This study generates new insights into the preservation properties of antimicrobial [email protected] film, which endow it with great application potential as a novel and eco-friendly packaging material for the food industry.
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JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Meisheng Han,Yongbiao Mu,Fu Yuan,Xuedong Bai,Jie Yu
To date, development of a lithium-ion battery anode with high capacity, long cycling life over ten thousands of cycles, and fast lithium ion storage within a few seconds for each cycle is still a challenge. Here, a highly mesoporous TiO 2 /C nanocomposite consisting of ultrathin carbon layers tightly coating on the surface of anatase TiO 2 nanocrystals with an average size of 20 nm via interfacial chemical bonds of Ti-O-C is obtained by a simple and facile vapor pressure-assisted synthesis route that pyrolysis of the solution of tetrabutyl orthotitanate tetramer dissolved in ethanol in a sealed vessel. As anode for lithium ion battery , the TiO 2 /C nanocomposite shows a reversible capacity of 630.3 mAh g −1 at 0.5C after 400 cycles, which is unprecedent for the ever reported TiO 2 /C electrode at similar cycle number. Besides, the TiO 2 /C nanocomposite also exhibits ultralong cycling lifetime (over 10000 cycles without capacity loss at 120C) and ultrahigh rate capability (20.5 mAh g −1 at 144C). The outstanding lithium ion storage performances are ascribed to its unique structures, i.e., ultrathin carbon coating, ultrasmall TiO 2 particles, the formation of interfacial chemical bonds of Ti-O-C, and highly mesoporous structure.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Cong Liu,Xu Cui,Yanhui Li,Qian Duan
A novel hybrid Cu 2 O@TiO 2 - g -zinc-tetraamino-phthalocyanine (CT- g -ZnTAPc) hollow sphere as “ day-night ” photocatalyst with spatially separated structures was prepared successfully. Firstly, three layers SiO 2 @Cu 2 O@TiO 2 (SCT) was synthesized with core–shell structure. Then zinc-tetraamino-phthalocyanine (ZnTAPc) immobilized on the surface of maleic anhydride (MAH) modified SCT with amide linkages. Finally, hollow CT- g -ZnTAPc spheres were obtained by NaOH etching. In this structure, ZnTAPc was grafted on the outer surface of TiO 2 as the main visible light absorber, while the inner surface was adhered with Cu 2 O as a secondary absorption of the scattered light. Both of Cu 2 O and ZnTAPc sensitized TiO 2 synergistically to broaden light response from ultraviolet to visible region and enhance photocatalytic activity. Meanwhile, TiO 2 - g -ZnTAPc and Cu 2 O@TiO 2 p–n heterojunctions based on the close match band structures, so they were expected to facilitate electron-hole separation more effectively. Moreover, TiO 2 would capture electrons from Cu 2 O and ZnTAPc under visible light and delayed releasing electrons without illumination to perform photocatalyzing in dark as “ day-night ” photocatalysts. K 2 Cr 2 O 7 (Cr (VI)), Rhodamine B (RhB) and tetracycline hydrochloride (TC•HCl) were employed as model pollutants as well as Cr (VI)-RhB coexistence system. Almost 95.2% of Cr (VI) could be reduced by CT- g -ZnTAPc, which was about 1.57 times of Cu 2 O@TiO 2 and 1.64 times of TiO 2 - g -ZnTAPc. Furthermore, CT- g -ZnTAPc had a high specific surface area (219.3 m 2 /g) as an efficient pollutant adsorbent, and was investigated by Langmuir, Freundlich and Temkin isotherm models. The maximum quantity of Cr (VI) adsorbed by CT- g -ZnTAPc was 48.8 mg/g. As a result, CT- g -ZnTAPc would be a potential effective and energy-saving multifunctional photocatalyst.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Tingting Yu,Bing Yang,Rong Zhang,Chenyu Yang,Arramel,Jizhou Jiang
The upsurge of interest in the emergence of photocatalytic fuel cell systems (PFC) presents an efficient and environmentally friendly approach to wastewater treatment. In this work, a Z-scheme coupled with an S-scheme heterojunction electrode was used in the PFC, utilizing TiO 2 /GO/g-C 3 N 4 as the photoanode and BiOAc 1– x Br x /BiOBr as the photocathode. We systematically align the band structures between the anode and cathode, which facilitates the electron transfer between the electrodes. Our attempt successfully demonstrates that collaborative power generation facilitates the high efficiency of tetracycline hydrochloride (TC) degradation at both electrodes. The photoanode achieved a 94.87 % degradation rate for TC, while the photocathode exhibited a 96.33 % degradation rate after 2 h, surpassing pristine BiOBr and BiOAc by factors of ∼5.3 and ∼3.8, respectively. Furthermore, this work proposed a mechanism for electron generation, transport, and pollutant degradation mechanism in the PFC. Intermediate substances generated during the degradation of TC were analyzed through high-performance liquid chromatography-mass spectrometry (HPLC-MS) and ultraviolet photoelectron spectroscopy (UPS), while the optimal degradation pathway was confirmed using density functional theory (DFT). The findings of this work establish the feasibility of efficiently degrading pollutants through PFC treatment, introducing a novel system where various heterojunctions in bipolar materials collaborate with photocatalysis to effectively generate electricity and enhance pollutant removal.
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