JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Jiawei Zhao,Bin Wang,Yaru Zhao,Mingming Hou,Changhui Xin,Qian Li,Xin Yu
Strong visible-light absorption and high surface areas contribute to high-perform semiconductor photocatalysis . This work aims to fabricate self-doped Ti 3+ -TiO 2 microspheres and dye sensitized self-doped Ti 3+ -TiO 2 composites with high surface areas and visible-light absorption via one-pot solvothermal strategy for highly enhanced photocatalytic tetracycline degradation under visible-light irradiation. The experimental results showed that the obtained Ti 3+ -TiO 2 microspheres showed enhanced visible-light capture capacity and a larger surface area of 204.9 m 2 g −1 . Besides, the obtained Eosin Y/Ti 3+ -TiO 2 composites showed efficient visible-light absorption and highly boosted photocatalytic performance towards tetracycline degradation. The highest rate constant for Eosin Y/Ti 3+ -TiO 2 -9% composite reached as high as 0.06657 min −1 , approximately 8.09 times that of commercial TiO 2 , strongly demonstrating the significant roles of dye sensitization. Finally, a reasonable dye-sensitization visible-light photocatalytic mechanism was suggested.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 15
·7278-7287
·
IF 3.3
Jie Zhang,Xuemeng Tian,Chaochao Dong,Ruixia Gao,Yuan Hu
There is a growing awareness of practices focused on the in-depth treatment and decontamination processes of firefighters’ personal protective equipment to decrease health risks. Hence, TiO2-nanoparticle-modified Cu-doped BiOBr microflowers (BiOBr–Cu2+/TiO2) have been devised and used as effective constituents to construct a type of decontamination agent that can efficiently and deeply eliminate hazardous chemicals. The 3D microflowers can be admirable carriers for the prevention of aggregation and outstanding adsorption, and the construction of a heterojunction based on the copper-doping strategy and sequential harvesting of light strategy provides enhanced light absorbance and efficient charge separation. The proposed materials have a nanoparticle-interspersed microflower morphology, enhanced light-harvesting ability, and excellent transfer of photogenerated carriers, leading to more effective adsorption and solar-light-driven photocatalytic activity than other catalysts. Moreover, the BiOBr–Cu2+/TiO2 composites mixed with different solvents can be used as decontamination agents for the in-depth treatment of hazardous chemicals under different situations. It is believed that employing heterojunctions as the constituents of decontamination agents has promise to become an effective and feasible method for deep decontamination processes in firefighting work.
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2023
·Vol. 15
·期 7
·e202201687
·
IF 4.5
Wenjing Xu,Yingying Cheng,Jing Hou,Peng Kang
Graphical Mesoporous TiO 2 spheres with large specific surface area were synthesized by a simple two-step method for the electrocatalytic reduction of oxalic acid. The maximum Faradaic efficiency for glycolic acid reached 73.9 % at −0.5 V at ambient temperature, exceeding most recently reported results. Reducing oxalic acid to glycolic acid electrochemically remains a significant challenge due to the high overpotential and low selectivity and stability. This study uses mesoporous TiO 2 spheres of anatase phase as catalysts to reduce oxalic acid to glycolic acid with low overpotential. The maximum Faradaic efficiency of glycolic acid reaches 73.9 % at −0.5 V vs RHE. The mesoporous structure not only increases the specific surface area, but also limits the escape of intermediate glyoxalic acid from the catalyst surface due to the space-limiting effect of the mesoporous channel, such that oxalic acid can be deeply reduced to glycolic acid. Moreover, a mechanism for oxalic acid reduction is proposed, and the Ti 3+ /Ti 4+ redox pair plays an important role in the reduction of oxalic acid.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Low-Carbon Technologies
·
2023
·
IF 2.3
Yang Mengdi,Liu Guangyan,Zhao Wei,Meng Fanbin,Lao Youliang,Liang Yi
The balance of light transmittance, durability and self-cleaning performance of the coating film is the main reason that hinders the wide application of photocatalytic self-cleaning coating on building exterior glass. In this article, TiO2 powder was prepared with different concentrations of tetrabutyl titanate, hydrochloric acid and ethanol; and following with compounded polyvinyl alcohol (PVA) and waterborne polyurethane as adhesives; the mixed composite coating was loaded on the glass surface by spraying method to obtain superhydrophilic glass with self-cleaning properties. The physical and chemical properties of TiO2 composite films were characterized and tested by diffraction, scanning electron microscopy, optical contact angle measuring instrument and photocatalytic testing system. The results showed that the X-ray diffractometer analysis of the powder obtained with different alcohol-ester ratios showed that the crystal synthesis was successful, and the grain size conformed to the nanometer standard. TiO2 dispersion with a concentration of 0.08 g/L, after 30 min of irradiation with an ultraviolet (UV) lamp, the methyl orange added dropwise in the solution can be completely degraded. With the increase of TiO2 concentration, the photocatalytic efficiency increased rapidly, the contact angle decreased, when the TiO2 concentration reached 0.3% and 3% binder compounding, the surface of the composite coating film was still smooth at the nanometer level, the visible light transmittance was between 86.95 and 88.89%, and the contact angle was reduced from the initial 46.49 to 14.89° after 2 h of UV illumination. After 5 repeated degradation experiments and outdoor 180-d standing test, the composite coating film has recyclability and good durability. Therefore, TiO2 composite coating prepared by this method has a wide application prospect in the daily cleaning and subsequent maintenance of building glass.
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·655
·
IF 3.4
Yuxin Bai,Shasha Xu,Jing Chen,Xun Sun,Shan Zhao,Jingcai Chang,Zuoli He
Ternary heterojunction photocatalysts can improve the transport and separation of photogenerated electrons and holes, which could promote their reduction and oxidation properties for environmental and energy applications. In this research, the ternary photocatalyst Ti3C2@TiO2/g-C3N4was successfully synthesized via direct electrostatic self-assembly during hydrothermal process. Ti3C2MXene was used to optimize the interfacial carrier transport and separation between the interfaces. The obtained ternary heterostructured photocatalyst had a higher photocatalytic degradation performance for removing rhodamine B (RhB) and 4-chlorophenol (4-CP). The synergistic effect of heterojunction between g-C3N4and TiO2and Schottky barrier presented among TiO2and Ti3C2suppressed the recombination of the photogenerated electron–hole pairs. Moreover, the Ti3C2can serve as an active site for the adsorption and activation of organic pollutants resulting from sufficient functional groups (F−here).Keywords:Ti3C2;g-C3N4;heterojunction;photocatalyst;4-chlorophenol
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2022
·
IF 11.021
Peipei Shao,Siyuan Huang,Bowen Li,Qingjiao Huang,Yiwen Zhang,Rui-Tao Wen
Titanium dioxide (TiO 2 ) draw great attention in developing electrochromic devices due to its low cost, dual-band optical modulation and wide potential window complementary to other EC films. Akin to other electrochromic oxides, TiO 2 suffers from the tradeoff between cycling stability and large optical modulation because of the ion trapping effect. In this paper, we find formation of β-traps can be prevented through adjusting the applied duration time at high potential, thus β-traps induced bleached state degradation in amorphous TiO 2 films can be eradicated. More importantly, we show the formed β-traps locate at the TiO 2 /electrolyte interface, and are independent of the employed electrolyte systems. The TiO 2 based full electrochromic devices confirm β-traps can be suppressed in a full device fashion. This work paves the way to understand the electrochromic performance degradation for oxide films upon square wave cycling and lays the foundation for adaptation in EC devices.
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-8
·
IF 4.011
Duan Zhuojun,Huang Yingzhou,Zhang Dingke,Chen Shijian
Exploiting photocatalysts with characteristics of low cost, high reactivity and easy recovery offer great potentials for complete elimination of toxic chemicals and environmental remediation. In this work, Au/TiO 2 network-like nanofibers were fabricated using a facile electrospinning technique followed by calcinations in air. Photocatalytic tests indicate that the Au/TiO 2 network-like nanofibers possess an excellent photodegradation rate of rhodamine B (RB) under UV, visible and natural light radiation. The enhanced photocatalytic activity can be attributed to the plasmonic resonance absorption of Au nanoparticles, and photogenerated electrons and holes are effectively separated by the Au/TiO 2 heterojunction structures. Furthermore, the three-dimensional network structure can provide a large number of active sites for RB degradation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Meijie Ren,Guangfei Qu,Heng Li,Ping Ning
The influences of different dissolved organic matter (DOM) components and ionic matters on As(V) adsorption/desorption behavior on the TiO 2 surface were investigated. The results demonstrated that the characteristics and involving order of DOM significantly affected the As(V) adsorption/desorption behavior. The presence of DOM decreased the As(V) adsorption quantity. Fulvic acid (FA) exhibited the most negative effect, and followed by the order of alginate ≈ BSA > SDBS. The precomplexation DOM prevented more As(V) adsorption. While, the presence of DOM caused more As(V) release when the surrounding changed and FA exhibited the strongest effect. The results indicated that the site competition and electrostatic repulsion were the major mechanisms to resist As(V) adsorption. The presence of Fe 3+ and Ca 2+ increased As(V) adsorption by bridge effect, while PO 4 3− and CO 3 2− decreased As(V) adsorption owing to the competition.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·085020
·
IF 1.449
Hexi Zhao,Yan Wu,Hui Nan,Yonglong Du,Guijun Yang,Gang Wang,Huiyuan Chen,Haomin Wei,Hong Lin
TiO2-ZnO, TiO2-Fe2O3, TiO2-NiO binary heterojunction nanocomposites were synthesized by hydrothermal method using tetrabutyl titanate (TBT) as titanium source. Phase composition, microscopic shape ,functional group characteristics and optoelectronic properties of samples were characterized by x-ray diffractometry (XRD), transmission electron microscopy (TEM), photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), cyclic voltammetry(CV),electrochemical impedance spectra(EIS) and Tafel polarization curve(Taf). The photocatalytic properties of TiO2, TiO2-ZnO, TiO2-Fe2O3 and TiO2-NiO were analyzed by the ability of degradation of methyl orange under visible light irradiation. The experimental results show that the binary heterojunction nanocomposites have been successfully constructed to promote the separation of photogenerated electron-hole pairs and improve the photoelectric performance. The photocatalytic results show that TiO2-NiO exhibits the best photocatalytic performance due to the difference in light utilization efficiency and charge transfer characteristics, which is consistent with the charge transfer resistance of TiO2 > TiO2-ZnO > TiO2-Fe2O3 > TiO2-NiO in EIS results. At the same time, the degradation kinetics of methyl orange (MO) in TiO2-NiO binary heterojunction nanocomposites under visible light irradiation is faster than other samples that can be completed in 160 min. The results show that TiO2-NiO binary heterojunction nanocomposites have broad application prospects in water treatment and wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Yumei Peng,Lixia Qin,Jiefei Liu,Shi-Zhao Kang,Guodong Li,Xiangqing Li
Here, by a simple one-step in situ chemical reduction method, the Ag x Cu y alloy was tailored on the surface of mesoporous TiO 2 (M-TiO 2 ), therefore, a series of bi-functional mesoporous TiO 2 nanohybrids (M-TiO 2 /Ag x Cu y ) for both surface enhanced Raman scattering (SERS) detection and photocatalytic degradation of ampicillin (AMP) were achieved. The composition and structure of the nanohybrids were well characterized using XRD, TEM, XPS and HRTEM-EDS measurements. Results indicated that Ag x Cu y alloy was mainly attached around the pores of M-TiO 2 which may generate more active sites than nonporous P25−Ag−Cu. Thus, the M-TiO 2 /Ag x Cu y nanohybrids could be used as efficient SERS substrates to sensitively monitor the AMP in water with lower detection limit (˜ 1 ppt) than P25−Ag−Cu. Besides, the M-TiO 2 /Ag 3 Cu 1 nanohybrid also showed higher photocatalytic activities for the degradation of AMP under UV irradiation over the M-TiO 2 /Ag, the M-TiO 2 /Cu and the P25−Ag−Cu. This work provided a simple and effective approach to synthesize bi-functional nanohybrids for detection and degradation of organic contaminants in wastewater.
✓ 已验证
产品关联
DOI
高影响因子
SUPERLATTICES AND MICROSTRUCTURES
·
2018
·
IF 2.099
Tianjiao Huang,Xiaoshan Zhang,Huan Wang,Xueting Chen,Lingling Wen,Meixin Huang,Yangshuai Zhong,Hui Luo,Guo Tang,Liya Zhou
In this paper, we developed a simple and convenient method for incorporating graphene with anatase-rutile TiO 2 composite and applied it as photoanode to improve the photovoltaic performance of CdS QDSSCs. Our research indicated in a CdS QDSSC system, the photoelectric conversion efficiency (PCE) of anatase-rutile TiO 2 (TGr0) composite photoanode was 86% higher than that rutile TiO 2 NRs. We also found that the PCE increased first and then decreased with the change of graphene content after the graphene was introduced into the anatase-rutile TiO 2 photoanode. When the ratio of optimized graphene/anatase TiO 2 particles composite that spin-coated on rutile TiO 2 NRs photoanode was 5%, we attained a maximum PCE of 2.20%, which was 178% and 50% higher than that pure TiO 2 NRs (0.79%) and TGr0 (1.47%), respectively.
✓ 已验证
产品关联
DOI
高影响因子
OPTICS EXPRESS
·
2019
·Vol. 27
·期 11
·15391-15398
·
IF 3.561
Ying Zhang,Ke Li,Fengyu Su,Zhongyu Cai,Jianxun Liu,Xiaowen Wu,Huilin He,Zhen Yin,Lihong Wang,Bing Wang,Yanqing Tian,Dan Luo,Xiao Wei Sun,Yan Jun Liu
Electrically switchable photonic crystals are demonstrated based on TiO2 inverse opals infiltrated with liquid crystals. Macroporous anatase TiO2 inverse opals are fabricated from polystyrene opal templates through a sandwich vacuum backfilled method and followed by calcination. Upon liquid crystal infiltration, the optical properties of the hybrid organic/inorganic structure are characterized by reflectance measurements of the Bragg peak, the position of which can be switched using an external electric field. The physical mechanism underlying this switchable behavior is the reorientation of the liquid crystal molecules inside the spherical voids by the applied electric field, resulting in a significant change of the refractive index contrast between the liquid crystal and the TiO2 inverse opal. With advantageous features of cost-effective fabrication, easy integration, and electric control, such TiO2 inverse opals infiltrated with liquid crystals could play an important role in future development of active photonic devices.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）