Journal of Physical Chemistry C
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2018
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IF 4.484
Jing Ma,Jingjing Chang,Zhenhua Lin,Xing Guo,Long Zhou,Ziye Liu,He Xi,Dazheng Chen,Chunfu Zhang,Yue Hao
With the fast development of the perovskite solar cell, its energy conversion efficiency has improved rapidly. In this paper, a CH3NH3PbI3–xClx organic–inorganic perovskite solar cell (PSC) was successfully prepared by the one-step solvent engineering method, and the planar heterojunction perovskite solar cell was optimized by interface engineering of the cathode interlayers. It was found that TiCl4 treatment could effectively reduce the TiO2 surface roughness, decrease the surface defects, improve the perovskite thin film crystallinity, and reduce the charge carrier recombination; hence, the short-circuit current density of PSCs and charge extraction and collection efficiencies were enhanced. Furthermore, PC60BM fullerene treatment could optimize the contact condition and reduce the interfacial potential loss. The device hysteresis effects after PCBM treatment were also reduced. The combination of TiCl4 and PC60BM treatments could largely improve the PSC device performance with a power conversion efficiency of 16.4% due to the synergetic effect.
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NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Meng Li,Diangen Zhou,Hualiang An,Shanshan Dong,Xinqiang Zhao,Yanji Wang
2-Ethylhexanal (2EH) is an important intermediate for the production of 2-ethyhexanoic acid (2-ETA), and studying the direct synthesis of 2EH through heterogeneous catalysis of n-butanal aldol condensation-selective hydrogenation reaction integration is of great significance for the industrial production of 2-ETA. Herein, a series of Pd/TiO2 catalysts were prepared and characterized by XRD, CO pulse adsorption, TEM, CO2/NH3-TPD and H2-TPR. Their catalytic performance for direct synthesis of 2EH from n-butanal was investigated in stainless steel autoclave first. The results showed that the Pd/TiO2 prepared by the excessive impregnation method, loaded with 0.5 wt.% of Pd, and reduced at 400 ℃ showed excellent catalytic performance: 95.4% conversion of n-butanal and up to 99.9% selectivity of 2EH. The particle size of Pd, the base strength and the amount of acid/base of the catalyst are the main factors affecting its catalytic performance. The smaller the particle size of Pd, the greater the base strength and the larger the amount of acid/base of the catalyst, the better its catalytic performance. Then the integrated reaction mechanism was established based on the results of characterization and FT-IR of online sampling. Furtherly, the continuity of the reaction process was achieved on fixed-bed reactor. Under the reaction conditions of a liquid hourly space velocity (LHSV) of 7.2 h-1, a reaction temperature of 190 °C and a H2 pressure of 3.2 MPa, the conversion of n-butanal and the selectivity of 2EH were 91.2% and 89.8%, respectively. During the continuous operation for 300 h under optimal conditions, the conversion of n-butanal decreased slightly first and then stabilized, while the selectivity of the target product 2EH remained basically unchanged.
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MATERIALS RESEARCH BULLETIN
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2025
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IF 5.7
Yanning Qu,Beibei Lou,Jie Ren,Yuan Yu,Lin Liao,Dongfeng Sun,Ru Yan,Xinyang Zhang,Shihu Lei
Quantum dot-based materials exhibit unique photocatalytic performance, however inefficient electron transfer and weak visible light absorption negatively affect the results. In this study, a hollow TiO 2 /black phosphorus quantum dot (BPQDs) composite with cavity reflection associated oriented electron transfer effects was developed for photocatalytic hydrogen (H 2 ) production. The H 2 evolution rate of TiO 2 /BPQDs composite is 19 times higher than that of BPQDs and 2.3 times higher than that of TiO 2 . BPQDs were demonstrated that effectively loaded into both external and internal layers of TiO 2 , the UV-Vis diffuse reflectance spectra revealed an increased light absorption capacity of the material after BPQDs loading. Photoelectric tests and density functional theory calculations demonstrated improved electron transfer ability of the composite. The research expands the design methods for BP-based composites, providing new insights into heterojunction enhanced efficiency for solar energy conversion.
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ACS Catalysis
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2025
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IF 13.1
Xiaorui Du,Chongshuai Gao,Jiaxin Huang,Yanbin Cui,Shijun Liu,Chenguang Wang
Controlling both the hydrogenation performance and the activation of Schiff base intermediate in catalysts is crucial for attaining high slectivity toward primary amine in the reduction amination of furfural. However, it remains pending for Pt-based catalysts, on which the reduction amination reactions rarely generate primary amines so far. In this work, we developed a Pt/TiO2 nanocluster (NC) catalyst with a size distribution independent of the reduction temperature and loading amount. The reductive amination performance was investigated by regulating the surface electronic state and the distance between Pt NCs, and the results, attractively, revealed that the catalyst with a lower loading amount exhibited a higher furfurylamine (FAM) yield. Further studies unraveled that the catalyst with a larger Pt NC proximity had more abundant effective adsorption sites for the key intermediate Schiff base, i.e., the surface Ti4+ sites adjacent to the Pt NC, promoting the transformation of the Schiff base. Meanwhile, reducing the surface density of Pt NCs helped control the intensity of hydrogen spillover, thereby inhibiting the occurrence of overhydrogenation reactions. Optimal activity for primary amine generation from furfural reductive amination was achieved with a Pt NC catalyst reduced at 500 °C and with a loading amount of only 0.1 wt %, resulting in a FAM yield exceeding 93% and a production rate of 297.9 gFAM gPt h–1. The reaction mechanism, involving the competitive relationship between NH3 and H2, was elucidated through kinetic studies and theoretical calculations. This work provides insights for the designation of catalysts with controllable hydrogenation activity and adsorption selectivity and contributes to the understanding of the mechanism of the reductive amination reaction.
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MOLECULES
·
2024
·Vol. 29
·期 5
·1182
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IF 4.2
Yunqing Zhu,Kaiyue Wen,Bingqing Li,Yirong Hao,Jianjun Zhou
In this study, the performance of a zero-gap flow-through reactor with three-dimensional (3D) porous Ti/RuO2-TiO2@Pt anodes was systematically investigated for the electrocatalytic oxidation of phenolic wastewater, considering phenol and 4-nitrophenol (4-NP) as the target pollutants. The optimum parameters for the electrochemical oxidation of phenol and 4-NP were examined. For phenol degradation, at an initial concentration of 50 mg/L, initial pH of 7, NaCl concentration of 10.0 g/L, current density of 10 mA/cm2, and retention time of 30 min, the degradation efficiency achieved was 95.05%, with an energy consumption of 15.39 kWh/kg; meanwhile, for 4-NP, the degradation efficiency was 98.42% and energy consumption was 19.21 kWh/kg (at an initial concentration of 40 mg/L, initial pH of 3, NaCl concentration of 10.0 g/L, current density of 10 mA/cm2, and retention time of 30 min). The electrocatalytic oxidation of phenol and 4-NP conformed to the pseudo-first-order kinetics model, and thekvalues were 0.2562 min−1and 0.1736 min−1, respectively, which are 1.7 and 3.6-times higher than those of a conventional electrolyzer. Liquid chromatography–mass spectrometry (LC–MS) was used to verify the intermediates formed during the degradation of phenol or 4-NP and a possible degradation pathway was provided. The extremely narrow electrode distance and the flow-through configuration of the zero-gap flow-through reactor were thought to be essential for its lower energy consumption and higher mass transfer efficiency. The zero-gap flow-through reactor with a novel 3D porous Ti/RuO2-TiO2@Pt electrode is a superior alternative for the treatment of industrial wastewater.
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PubMed
高影响因子
TALANTA
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2024
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IF 5.6
Shuning Yang,Li Tian,Weiwei Fu,Huiling Li,Chao Li,Yujia Song,Ruidan Li,Yanjia Guo,Lun Zhao
The novel TiO 2 and Ni-MOF materials were synthesized and utilized for the detection of permethrin (PET). A highly sensitive solid-state electrochemiluminescence (ECL) sensor was developed based on Ni-MOF@Ru(bpy) 3 2+ and Au NPs@TiO 2 . In this sensing platform, Ru(bpy) 3 2+ -Tripropyl Amine (TPrA) was used as a luminescent signal, Ni-MOF acted as a carrier to carry more luminescent reagents Ru(bpy) 3 2+ . Au NPs acted as promoters facilitated electron transport and TiO 2 could further enhance the luminescence intensity of the system by synergistical interaction with Au NPs. The possible mechanisms of signal amplification were investigated. The ECL intensity decreased significantly with increasing PET concentration, enabling the determination of PET amount through the observation of the change in ECL signal intensity (ΔI). Under optimal experimental conditions, the linear range of PET concentration from 1.0 × 10 −11 mol L −1 to 1.0 × 10 −6 mol L −1 , with a detection limit of 3.3 × 10 −12 mol L −1 (3S/N). This method was successfully applied to determine PET in various vegetable samples.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2024
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IF 4.7
Haitao Zhang,Ningchen Ye,Runzhe Dong,Qing Li,Zheng Wang,Zifei Gao,Xiang Ji,Lin Liu,Juanjuan Ma,Zhiwei Tong
A simple electrochemical reduction technique was employed to generate Ti 3+ with strong reducing property on the anodic TiO 2 nanotubes (ATNTs). Utilizing Ti 3+ as the reducing agent, Pd 2+ was successfully reduced in situ to Pd 0 on the anodic TiO 2 nanotubes (Pd@ATNTs). Various characterization methods were employed to confirm that the proportion of Ti 3+ and the size of Pd nanoparticles could be controlled by adjusting the electrochemical reduction voltage. The obtained [email protected] exhibited satisfactory catalytic efficiency (TOF: 1302 h −1 ) in the Heck reaction between various aryl halides and olefins. Furthermore, [email protected] demonstrated high stability, with no significant loss of catalytic activity observed even after six cycles.
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Surfaces and Interfaces
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2024
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IF 5.7
Zhonghui Han,Xiaobin Yang,Xinnan Shi,Leyao Wu,Peng Hu,Haibo Fan,Feng Teng
The band structure of heterojunction plays an important role in the performance of actual application and can be adjusted by the change of preparation condition. Herein, Cu 2 O nanofilms with different band structures were prepared via electrodeposition method by modifying the solution environment. With the value of pH increased from 7 to 12, the conductivity of the Cu₂O nanofilms shifted from n-type to p-type. Combined the obtained Cu 2 O film with TiO 2 nanoarray, the Cu 2 O/TiO 2 heterojunction were prepared. The photoelectrochemical performance of the Cu 2 O/TiO 2 heterojunction was affected by the interfacial band structure. The T7 sample has higher photocurrent (450 μA) caused by the unique S-scheme band structure, the T11 sample with a p-n junction structure takes second place (225 μA). The n-n type II heterojunction has the lowest photocurrent (20 μA). The Fermi level of Cu 2 O nanofilm was affected by the type of defects, such as oxygen and copper vacancies, leading to changes of band structure at the interface between Cu 2 O and TiO 2 . The obtained result further illustrates the importance of energy band engineering, and provides route and sight for the development and application of Cu 2 O/TiO 2 heterojunction.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Hao-Yu Zhou,Bai-Yu Feng,Zhen-bin Pang,Guo-Zhi Han
In this paper, using PVP-modified polystyrene microspheres as template, tetrabutyl titanate (TEOT), tetraethyl orthosilicate (TEOS) and melamine as precursor, we developed a facile one-pot two-step method to preparing a novel kind of mesoporous hollow SiO 2 @TiO 2 @g-C 3 N 4 ternary composite microspheres with plush surface, in which highly active black titanium dioxide (TiO 2 ) was formed by simple calcination without further chemical reduction treatment. The structure and morphology of the composite microspheres were detailed characterized for understanding the formation mechanism. Research results indicated that the hollow SiO 2 microspheres can promote the formation of oxygen vacancies in TiO 2 , and the ternary combination narrowed the bandgap width of the black hollow composite microspheres to 1.43 eV, thus endowing it with excellent broad-spectrum catalytic performance for rapid photo-degradation of persistent organic pollutants (POPs) such as dyes and antibiotics in water under sunlight. The removal rates of dyes reached more than 70 %, as well as that of antibiotics more than 50 % within one hour. Finally, a plausible catalytic degradation mechanism was discussed.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
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IF 4.2
Fanhua Yu,Shaojie Hong,Bin Guo,Xiangqian Ren,Xingfu Zhou
Ozone water is widely used in disinfection area and wastewater treatment due to its strong oxidation. Recent studies have found that Ti/SnO 2 -Sb-Ni (NATO) anode has higher O 3 generation efficiency due to its higher oxygen evolution potential. In this paper, TiO 2 nanotubes (TiO 2 -NTs) were prepared by anodic oxidation method as the basic substrate material for the Ti/SnO 2 -Sb-Ni electrode, and SnO 2 -Sb-Bi was introduced as the intermediate layer to investigate the electro-synthesis of ozonated water. Studies show that the modification of the TiO 2 -NTs substrate provides a larger specific surface area for the reaction and accelerates the transfer of electrons from the oxide layer to the substrate. The introduction of the SnO 2 -Sb-Bi intermediate layer effectively delays the electrode deactivation and also enhances the electron transport. When the Ti/TiO 2 NTs/SnO 2 -Sb-Bi/NATO electrode was used and electrolyzed for 15 min, the ozone water concentration reached 13.15 mg L −1 , about twice as much as the unmodified electrode. The effects of current density and the coating numbers of active layers on the electrosynthesis of the ozonated water were also investigated. Finally, the application of ozonated water in the decolorization of organic dye wastewater was investigated based on its strong oxidation property, the degradation rate of 40 ppm methylene blue reached 94.5 % and the COD removal rate reached 72.9 % in 30 min. In addition, the cell voltage remained constant during decoloration, indicating the good stability of the electrode. This study also opens a door to the rapid electrochemically decoloration of wastewater and sterilization area by using electrochemically obtainable ozone water.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Xuyang Hu,Lihui Huang,Ting Sun,Zhenhui Gao,Zhengjun Qu
In this study, the synthesis of titanium dioxide nanotubes/graphene aerogel (TNGA) as a particle electrode and the application in the three-dimensional (3D) electrode for the treatment of low electrolyte concentration wastewater containing tetracycline hydrochloride (TCH) was studied. The effect of reaction parameters (electrode, electrolyte concentration, cell voltage, initial pH, ratio of TNGA mass to solution volume) on the degradation of TCH in an electrochemical system was investigated. At the optimum conditions (cell voltage 18 V, initial pH 6 and TNGA mass to solution volume ratio 2 mg/mL) predicted by the response surface methodology (RSM), a high TCH degradation rate (90.6 %) was obtained after 3 h. TNGA showed relatively high stability in the electrochemical oxidation of organic pollutants (82.3 %) even after fifty continuous cycling experiments. The quenching experiments and electron paramagnetic resonance (EPR) indicated that TNGA can generate singlet oxygen in the 3D electrode system. Two possible degradation pathways for TCH were given based on possible intermediates. This study first showed that TNGA is an excellent electrocatalytic material as a particle electrode in antibiotic elimination.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Zhukang Bai,Yadong Wu,Jun Li,Shun Wang,Xuqiang Peng,Huile Jin
To attain the high dispersion and strong interfacial bonding of TiO 2 in fluororubber (FKM), a novel “core–shell” structured SiO 2 @TiO 2 nanofillers was designed and synthesized by in-situ polymerization and grafting modification method. For the “core–shell” structured SiO 2 @TiO 2 nanospheres , the rough and irregular silica shell can improve the surface area of the SiO 2 @TiO 2 filler and realize the mechanical riveting with the FKM, which shows a significant mechanical properties enhancement function. Compared with the pristine FKM, the tear strength , tensile strength , hardness, modulus at 100% strain, modulus at 300% strain, and storage modulus at −100 °C of FKM/SiO 2 @TiO 2 enhanced by 42.4%, 196.9%, 10%, 24.4%, 66.7%, and 15.5%, respectively. The sample’s electrical, thermal, and color properties were also improved and showed the highest haze and lowest light transmissions. Such a simple and effective method of preparing “core–shell” structured SiO 2 @TiO 2 nanofillers provides great potential in industrial applications.
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