NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 15
·6878-6884
·
IF 3.925
Yunfei Ma,Wenhui Yue,Ziwei Ye,Jinglong Zhang
Doping of TiO2 with metals and/or non-metals is an effective strategy for increasing its inherently low photocatalytic activity. In this work, TiO2 nanocrystals co-doped with nitrogen (N) and terbium (Tb) were prepared using a controlled hydrolysis method with water generated in situ via esterification of acetic acid and n-butanol. Compared with undoped TiO2 nanocrystals, co-doped TiO2 nanocrystals exhibited enhanced visible-light absorption and improved charge-carrier separation efficiency due to the synergy between N and Tb. In addition, they also had larger surface area and stronger interaction with the azo-dye acid orange 7 (AO7) compared with undoped TiO2 nanocrystals, giving rise to catalytic activity which was ca. 2× better than undoped TiO2 nanocrystals for photocatalytic degradation of AO7 under visible-light irradiation. For the given N loading, the optimal Tb doping for co-doped TiO2 nanocrystals to achieve the maximum activity was 1%, at which complete decolorization of AO7 was achieved after 5 hours of visible-light irradiation.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Dandan Liu,Haiou Liang,Chunping Li,Jie Bai
Photocatalytic water splitting is a prospective strategy to solve the shortage of human fossil fuel energy. In this work, we designed and synthesized the Pt as co-catalyst decorated on TiO 2 nanotubes/metastable zinc-blende (ZB) CdS nanoparticles (NPs) with highly exposed (1 1 1) facets (HPTCA3) via the electrospinning-solvothermal and chemical deposition methods. The H 2 evolution rate of HPTCA3 was 15025.38 μmol·g −1 ·h −1 , which was about 111.3 and 2.4 times stronger than that of pure CdS power and Pt-TiO 2 /CdS hollow nanotubes (HPTC). The XRD patterns showed the presence of acetate promoted the growth of ZB CdS (1 1 1) crystal facets, and the photogenerated electrons were easily tended to accumulate on the CdS (1 1 1) facets, whichwas conducive to the transmission of electrons on the CdS and TiO 2 interface. The type II heterojunction can broaden the visible light response range and accelerate the separation and transfer of photo-generated electrons and holes which can be supported by the Optical and Electrochemical characterizations. Band structure calculations and XPS spectrum indicated that the composite catalyst had an efficient electron transfer mechanism, which was beneficial for the spatial separation of photogenerated carriers. The work provides a rational photocatalyst design to improve the performance of photocatalytic splitting of water into hydrogen.
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
Jinpeng Tao,Zaiqiong Liu,Zhenyu Zhu,Yanli Zhang,Hongbin Wang,Pengfei Pang,Chun Yang,Wenrong Yang
An ultrasensitive electrochemical detection of the activity and inhibition of T4 polynucleotide kinase (T4 PNK) was developed by using magnetic Fe 3 O 4 @TiO 2 core-shell nanoparticles , which was triggered by a rolling circle amplification strategy (Fe 3 O 4 @TiO 2 -RCA). We used Fe 3 O 4 @TiO 2 as a substrate to anchor a DNA primer . DNA S1 with 5′-OH termini was phosphorylated in the presence of T4 PNK and ATP, which was adsorbed on the surface of Fe 3 O 4 @TiO 2 NPs and served as the primer for subsequent RCA reactions. After adding circular template DNA S2, RCA was initiated in the presence of phi29 DNA polymerase and dNTPs. Then, Fc-labeled DNA S3 (Fc-S3) was hybridized with RCA. The obtained Fe 3 O 4 @TiO 2 -RCA was adsorbed on the surface of a magnetic gold electrode (MGE) by magnetic enrichment, resulting in an enhanced electrochemical signal. The T4 PNK activity can be monitored by measuring the electrochemical signal generated. This electrochemical assay is sensitive to the activity of T4 PNK with a dynamic linear range of 0.00001–20 U/mL and a low detection limit of 3.0 × 10 −6 U/mL. The proposed strategy can be used to screen the T4 PNK inhibitors, so it has great potential in the discovery of nucleotide kinase-target drug and early clinical diagnosis of cancer.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2022
·Vol. 414
·期 17
·4837-4847
·
IF 4.478
Lv Xiaoyi,Hu Qiong,Miao Tian,Li YanPing,Cui Bo,Fang Yishan
Herein, we fabricated a label-free ECL immunosensor for aflatoxin B 1 (AFB 1 ) detection. In this system, a small organic aggregation-induced electrochemiluminescence luminophore, 2,5-di-tetraphenylethylene-ylthiazolo [5,4-d] thiazole, was designed, named TPETTZ. Polyaniline-wrapped TiO 2 nanoparticles (PANI/TiO 2 NPs) complex was synthesized through one-step in situ oxidation polymerization of aniline, and performed excellent electrical conductivity and abundant amino groups. As an ECL accelerator, TiO 2 nanoparticles (TiO 2 NPs) promoted the oxidation of tri- n -propylamine (TPA) to generate more TPA • ; in addition, it also acted as a donor to improve the ECL intensity of TPETTZ (acceptor) through electrochemiluminescence resonance energy transfer (ECL-RET). Encouraged by the above, under the existence of TPA, TPETTZ displayed a strong and continuously stable ECL anode signal due to the introduction of PANI/TiO 2 NPs. Therefore, the immunosensor was constructed for AFB 1 detection based on the quenching effect of target on the ECL signal, and a linearly decreasing ECL signal was obtained as the increasement of AFB 1 in the range of 75 fg/mL to 100 ng/mL, with a lower detection limit of 27.5 fg/mL. Moreover, the as-prepared sensing platform performed a satisfactory anti-interference, stability, and reproducibility, and appeared a good accuracy in walnut sample analysis, presenting a promising application in the future.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 12
·6649-6661
·
IF 14.511
Junjie Ti,Jingwei Zhu,Benlin He,Zhihao Zong,Xinpeng Yao,Rui Tui,Hao Huang,Cong Chen,Haiyan Chen,Yanyan Duan,Qunwei Tang
The carrier recombination loss induced by defects, imperfect contact and energy level barriers at the buried interface severely restricts the greater advancement of comprehensive performance of perovskite solar cells (PSCs). Herein, a versatile inorganic ammonium salt of diammonium hydrogen phosphate (DAP) is exploited as a “double-sided tape” modifier to be deposited at the TiO2/perovskite buried interface, which not only passivates the surface defects of TiO2 and perovskite layers and simultaneously bridges the two films via the chemical reactions of hydrogen phosphate anions and ammonium cations in DAP with TiO2 and CsPbBr3 perovskite, respectively, but also ameliorates the interface contact and energy level alignment. Moreover, a higher quality perovskite film with fewer grain boundaries and defects is tightly formed on the DAP modified TiO2 layer arising from its lower wettability. Consequently, a substantially improved charge transport and extraction and minimized charge recombination are achieved in DAP tailored all-inorganic hole transport layer-free CsPbBr3 PSCs, yielding a power conversion efficiency as high as 10.31% with an impressive open-circuit voltage of 1.621 V, which is highly increased compared to 7.58% for the control device. Furthermore, the optimized device free of encapsulation exhibits a superior long-term stability after exposure to an air atmosphere at 85 °C with 85% RH over 720 h.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Kangning Liu,Jiliang Ma,Xiaopan Yang,Dongnv Jin,Yancong Li,Gaojie Jiao,Shuangquan Yao,Shaolong Sun,Runcang Sun
Photocatalytic biorefinery catches an ocean of attention because of its environmental friendliness. It is widely known that photocatalytic performance of TiO 2 is poor due to the wide bandgap and sluggish electron kinetics. Herein, biochar nanosheet and anatase TiO 2 (denoted as a- TiO 2 @MC) were combined to accelerate the charge separation/transfer and narrow the bandgap of TiO 2 , which is proved by UPS and Mott-Schottky plot analysis. With improved electron kinetics, comes excellent photocatalytic performance, which gave great yield of xylonic acid (52.26%) and lactic acid (49.22%). Furthermore, h + ,·OH, and 1 O 2 exerted positive effects on the synthesis of biomass-derived organic acids, in which the h + plays the major role in the biorefinery over a- TiO 2 @MC, whereas the·O 2 - is not. 1000-fold scale-up experiment indicated that 69.1% of the photocatalytic performance was achieved when compared with the similar conditions irradiated by visible light. This work provides an efficient photocatalytic biorefinery via a facile and low-cost way.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jiayao Yang,Jinfeng Dai,Xiaohuan Liu,Shenyuan Fu,Enmin Zong,Pingan Song
Lignin, as a natural polymer material, has the advantages of green safety, renewable, and pollution-free. It has a wide application prospect in the field of thermosetting. However, it has been attractive but a huge challenge to design high performance and high added-value lignin-based epoxy resin. Herein, lignin-based epoxy (LEP) was synthesized from moso bamboo-derived lignin, and then lignin-based epoxy/titanium dioxide (LEP/TiO 2 ) hybrid nanoparticle was synthesized via liquid deposition method for modifying lignin-based epoxy resin to prepare multifunctional bio-based epoxy. The results show that the LEP/TiO 2 hybrid nanoparticle exhibits a stable topological surface shape and good dispersion and uniformity. By adding 10 wt% LEP/TiO 2 hybrid nanoparticles, the multifunctional bio-based epoxy exhibits good mechanical strength and toughness, and the tensile strength and fracture toughness reach 36 MPa and 1.26 MPa·m 1/2 , respectively. In addition, the thermal stability , UV absorption and antibacterial properties of the multifunctional bio-based epoxy are further improved. This study provides a facile and efficient method for the preparation of high-performance multifunctional bio-based epoxy composite and a novel solution for the utilization of lignin.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zihan Tian,Shixiao Wang,Yilin Wu,Feng Yan,Shuhao Qin,Jingkui Yang,Jianxin Li,Zhenyu Cui
PVDF@TiO 2 NPs hybrid membranes with different hybrid modes were fabricated. The chemical structure , surface characteristic features and optical properties of the hybrid membranes were characterised. The effects of different hybrid modes on photocatalytic performance are discussed for the first time. The results indicated that the membrane with both chemical bonding and coordination between TiO 2 NPs and polymer matrix showed the best photocatalytic performance. Furthermore, the aggregation tendency of TiO 2 NPs on the hybrid membrane surface was effectively suppressed and the band gap of TiO 2 NPs was significantly reduced. The photogenerated electron-hole recombination rate was significantly decreased by the strongly electronegative fluorine (F), carboxyl and ester groups. Additionally, the negatively charged carboxyl groups on the surface of hybrid membrane facilitated the adsorption of methylene blue (MB) dye and promoted the adsorption-photocatalytic degradation of the MB. The photocatalytic degradation efficiency ( η ) of MB was higher than 95.4% and the η remained greater than 90% after 5 recycling cycles. Compared with membranes prepared by dip coating or blending, the grafted membrane exhibited higher degradation efficiency and improved recyclability. Therefore, this membrane provided a simple method for preparing stable hybrid membranes with better photocatalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Ji Shi,Wenyu Huang,Hongxiang Zhu,Jianhua Xiong,Huiting Bei,Shuangfei Wang
Widespread application of TiO2 for degradation of antibiotics is restricted by mainly the low photodegradation efficiency under solar irradiation. To expand the application of TiO2, the key factors that should be improved are visible-light response, yield of electrons and holes, and durability. Herein, we report a visible-light responsive and durable sugarcane-bagasse-derived biochar supported hydrogenated TiO2 (HSCB/H2-TiO2) photocatalyst with higher electron production fabricated by a facile one-pot hydrogenation. Mild hydrogenation temperature preserved the lotus-stem-like structure of sugarcane bagasse and gave the photocatalyst great separability. The superior durability of HSCB/H2-TiO2 was demonstrated by 12 rounds of repeated degradation of methylene blue (MB). In addition, the electron paramagnetic resonance (EPR) results demonstrated that the biochar skeleton contains abundant persistent free radicals (PFRs), which can provide excess electrons to form more •O2–. Meanwhile, radical quenching experiment and EPR radical trapping results also revealed that •O2– was the most dominant species for enrofloxacin (ENR) degradation. Thus, the as-fabricated photocatalyst shows excellent solar-driven degradation of ENR, and 95.6% of ENR was degraded in 180 min under simulated solar irradiation. Possible ENR degradation pathways and mechanism are also proposed based on the identified intermediates.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xian Li,Jiafeng He,Weilong Zhang,Lijun You,Jumei Li
A sandwich structured Fe 3 O 4 /Ag/m(TiO 2 -ZrO 2 ) magnetic nanosphere with Ag nanoparticles as an interim layer was fabricated with in situ deposition of Ag nanoparticles onto Fe 3 O 4 nanospheres and subsequent coating an outmost shell of mesoporous TiO 2 -ZrO 2 . As compared to Fe 3 O 4 /m(TiO 2 -ZrO 2 )/Ag with Ag nanoparticles as the outmost layer, unique Fe 3 O 4 /Ag/m(TiO 2 -ZrO 2 ) sandwich nanospheres possess higher efficient charge migration and larger specific surface area disclosed by the BET and photoelectrochemical characterizations, so they present improved photocatalytic activity toward Cr(VI) reduction. In addition, they have high thermal stability because mesoporous TiO 2 -ZrO 2 outmost shell could protect the interim Ag nanoparticles from damage and agglomeration at high temperature. Results showed reduction efficiency of Cr(VI) of Fe 3 O 4 /Ag/m(TiO 2 -ZrO 2 ) reached 98.4 % in 30 min, as 1.6 times as that of Fe 3 O 4 /m(TiO 2 -ZrO 2 )/Ag. The Fe 3 O 4 /Ag/m(TiO 2 -ZrO 2 ) still obtained 91.3 % and 87.9 % reduction ratio after calcination at 500 ℃ and recycling 5 times, respectively. The photocatalytic mechanism was also revealed by scavenger experiments and ERP analysis. This work provided a good example for further design and preparation of magnetic photocatalysts with high performance for the remediation of heavy metal pollutants.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hui Li,Juan Lai,Min Yao,Yingmeng Leng,Zhengde Wu,Jian Zhang,Hailong Peng,Zumin Qiu
A new method was applied to modify TiO 2 nanoparticles. Epoxy resin (EP) and M-TiO 2 nanoparticles were used to prepare a novel superhydrophobic composite coating (M-TiO 2 @EP) by a one-step spraying method. The M-TiO 2 @EP coating surface has rough surface with hierarchical micro-/nanostructures. The M-TiO 2 @EP coating showed excellent superhydrophobicity capability with a high water contact angle (156°) and low sliding angle (6°). The M-TiO 2 @EP coating exhibited outstanding mechanical durability owing to multilayer structure of M-TiO 2 and the adhesion enhancement of EP, and the coating still retained superhydrophobicity after long-distance (10 m) mechanical wear under the weight of 200 g. Meanwhile, the M-TiO 2 @EP coating can capture stable air film to prevent the permeation of H + , Cl − , and OH − from water and simultaneously absorb more UV irradiation. Additionally, the M-TiO 2 @EP coating superhydrophobicity was also proven for various droplets and excellent self-cleaning performance. Meanwhile, the M-TiO 2 @EP coating also showed outstanding resistance to both extreme temperatures, UV resistance, corrosion resistance, and anti-icing ability. Therefore, the novel M-TiO 2 @EP coating with these excellent properties could yield a prospective candidate for promising outdoor and harsh condition applications.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 36
·17505-17516
·
IF 3.925
Kuang Wang,Jialong Tian,Wenhui Yu,Ling Lin,Zhenming Qi,Chunxia Wang
A novel and efficient approach is presented herein to develop self-cleaning and ultraviolet resistant cotton fabrics loaded with a self-dispersed and reactive TiO2/BiOBr photocatalyst. TiO2/BiOBr was synthesized by a facile hydrothermal method and characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) and photocatalytic activity. Amino-functionalized TiO2/BiOBr was prepared through the reaction of 3-aminopropyltriethoxysilane with TiO2/BiOBr and then reacted with sodium 2-(4-(4,6-dichloro-1,3,5-triazine-2-ylamino)phenylsulfonyl)ethyl sulfate (SDTES) to obtain self-dispersed and reactive TiO2/BiOBr. The chemical structure and dispersity of TiO2/BiOBr, amino-functionalized TiO2/BiOBr and self-dispersed and reactive TiO2/BiOBr were revealed utilizing Fourier transform infrared spectroscopy (FTIR) and a zeta potential test. Cotton fabric was loaded with self-dispersed and reactive TiO2/BiOBr by the dip dyeing method. XRD and SEM were employed to characterize the crystalline structure and surface morphology of cotton fabrics, respectively. In addition, the anti-ultraviolet, self-cleaning and wash fastness properties of cotton fabrics were studied. The photocatalytic test demonstrated that TiO2/BiOBr has superior photocatalytic activity than TiO2 or BiOBr under simulated sunlight irradiation. In addition, the experimental results showed that self-dispersed and reactive TiO2/BiOBr had commendable dispersity and storage stability. The cotton fabric loaded with self-dispersed and reactive TiO2/BiOBr had exceptional anti-ultraviolet, self-cleaning and washing properties. The photocatalytic mechanism of self-dispersed and reactive TiO2/BiOBr and its binding reactions with cotton fabric were proposed, which may provide a reference for broad application potential in functional textiles.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）