JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Rabigul Tursun,Yuchang Su,Jing Zhang,Reyimuaji Yakefu
In this study, different volume ratios (NiTiO 3 : CoFe 2 O 4 = 1:3, 2:3, 1:1) of NiTiO 3 /CoFe 2 O 4 composites were synthesized using the sol-gel method. The effects of different NiTiO 3 volume ratios on the structural, morphological, magnetic, and microwave properties were systematically investigated by X-ray diffraction spectroscopy (XRD), field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy (RAMAN), vibrating-sample magnetometery (VSM), and vector network analysis. Electromagnetic wave absorption analysis indicated that 1:3 composite sample showed the greatest reflection loss (−21.7 dB at 17.1 GHz frequency) at a thickness of 10.0 mm. The microwave absorbing properties decrease with the increasing NiTiO 3 volume ratio. The observed improvement can be attributed to the low degree crystallization of NiTiO 3 that increases magnetic losses through increased exchange resonance.
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 29
·e202401592
·
IF 1.9
Yazhou Wang,Shunxiang Wang,Qingjie He,Weiqi Sun,Jiaao Wu,Yongpeng Xia,Cuili Xiang,Yongjin Zou,Fen Xu,Lixian Sun
Graphical We employ a hydrothermal method and high-temperature calcination to prepare well-dispersed NiTiO 3 nanoparticles with smaller than 20 nm. The NiTiO 3 nanoparticles show good catalytic effect on hydrogen storage of MgH 2 . The further structural analysis shows that the excellent hydrogen storage performance of MgH 2 -NiTiO 3 benefits from multivalent state of titanium and Mg 2 Ni/Mg 2 NiH 4 . Magnesium hydride (MgH 2 ) has gained significant consideration as a cost-effective solid-state hydrogen-storage material with a substantial hydrogen capacity. However, its practical applications are impeded by its poor kinetics and high thermal stability. In this study, we employed a hydrothermal method and high-temperature calcination to prepare well-dispersed NiTiO 3 nanoparticles smaller than 20 nm. Next, we investigated the effect of the NiTiO 3 nanoparticles for educating the hydrogen storage performance of MgH 2 . The synergistic catalytic effect of multivalent titanium and Mg 2 Ni/Mg 2 NiH 4 enhanced hydrogen storage performance of the MgH 2 system. The addition of 5 wt % NiTiO 3 lowered the initial hydrogen evolution temperature of MgH 2 to 194 °C. After 12 minutes at 275 °C, the 5 wt % NiTiO 3 -MgH 2 composites released 6.1 wt % of hydrogen. The dehydrogenation activation energy ( E a ) of the 5 wt % NiTiO 3 -MgH 2 composites decreased significantly to 38.78±2.1 kJ/mol. Furthermore, hydrogen uptake of 5 wt % NiTiO 3 -MgH 2 at 125 °C reaches 5.1 wt % in 300 s under hydrogen pressure of 20 bar. These findings introduce an innovative concept for preparing high active catalysts for improving the dehydrogenation/hydrogenation kinetics of MgH 2 .
研究领域:
材料科学
·
能源存储
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高影响因子
CERAMICS INTERNATIONAL
·
2016
·Vol. 43
·期 3
·3314-3318
·
IF 2.758
Gao-yu Zhao,Yu Zhang,Lin Jiang,Hong-mei Zhang
A series of NiTiO 3 /Ag 3 PO 4 composites were prepared by a simple ion-exchange deposition method . The composition and morphology of the samples were determined by XRD , EDS and SEM. UV–vis DRS was used to characterize their optical absorption properties. The loading of NiTiO 3 could promote the efficient separation of photoinduced electron-hole pairs and enhance the charge carrier transport to improve the photocatalytic activity . The APO-5 composite exhibited the best photocatalytic activity for the degradation of methyl violet (MV). Kinetics studies indicated that the APO-5 composite showed an apparent rate constant of 0.115 min −1 , which was 2.61 times that of pure Ag 3 PO 4 .
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 47
·24767-24774
·
IF 8.867
Chenlong Dong,Xiangye Liu,Xin Wang,Xiaotao Yuan,Ziwan Xu,Wujie Dong,Muhammad Sohial Riaz,Guobao Li,Fuqiang Huang
Developing economical and stable bifunctional electrocatalysts for overall water splitting is of enormous importance for sustainable energy systems. Here, Ni/NiTiO3 with a villiform structure assembled by nanosheets is presented as an efficient bifunctional electrocatalyst. The Ni/NiTiO3 with a molar ratio of 15 : 1 (Ni : Ti) manifests remarkable catalytic performance for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline solutions, with onset overpotentials of 270 mV for the OER and ∼50 mV for the HER. Large amounts of Ni nanoparticles inset in the NiTiO3 nanosheets possess a high specific surface of 28.4 m2 g−1 which is far greater than that of bare Ni (7.7 m2 g−1). The results of long-term OER operation confirm that the introduction of Ti4+ is favorable for enhanced stability. When the catalyst is employed as both the cathode and anode for overall water splitting, it displays an onset potential of 1.55 V in 1 M KOH solution which can rival that of the integrated performance of Pt/C and RuO2. Hence, our Ni/NiTiO3 electrocatalysts have enormous potential for realistic large-scale water splitting.
研究领域:
材料科学
·
能源化学
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Pengfei Zhou,Mingqiang Fan,Cheng Ye,Tao Wang,Bo Yang,Miaolian Ma,Wanpeng Zhou,Ling Qin,Bin Li,Chuanliang Wei,Jie Ren,Maofeng Zhang
Modulating surface defects via sulfur engineering, combined with rational heterojunction design, represents a promising strategy to enhance the photocatalytic hydrogen evolution performance. This study presents a facile synthesis of CuIn5S8 quantum dots (CIS QDs) through sulfur engineering and their subsequent anchoring onto NiTiO3 (NTO) nanorods via a one-pot hydrothermal approach. The structural characterization revealed that the heterojunction possessed 2–6 nm CIS QDs, while NTO nanorods exhibited an average diameter of 361 nm and a length of 1.5–2.5 μm. Through comprehensive analysis, the excess S2– ions could form a passivation layer on the QD surfaces, which effectively suppressed surface defects and significantly improved charge separation efficiency. The optimized Z-scheme NTO/CIS-16S heterojunction achieved an exceptional hydrogen evolution rate of 22.7 mmol g–1 h–1, which surpasses most reported CIS- or NTO-based photocatalysts to date, representing 65.2- and 9.1-fold enhancements over pristine CIS-16S and NTO/CIS-1S, respectively. This work provides valuable insights into the construction of band-aligned heterojunctions and the regulation of interfacial charge dynamics, paving the way for efficient, solar-driven hydrogen production.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Rui Xu,Rui Feng,Dong Wei,Tao Yan,Yong Zhang,Wei Cao,Dawei Fan,Qin Wei,Huangxian Ju
An original signal amplification photoelectrochemical (PEC) immunosensor for procalcitonin detection was fabricated based on Zn x Bi 2 S 3+x sensitized NiTiO 3 nanorods. Using ethylene glycol as medium, the NiTiO 3 nanorods were successfully manufactured after calcination in air atmosphere, the rod-like structure have rough surface that produced benefit to capture lots of functional Zn x Bi 2 S 3+x , the sensitizer sensitized NiTiO 3 on ITO substrate by means of a sequential ionic layer adsorption reaction, and the obtained Zn x Bi 2 S 3+x /NiTiO 3 composites showed an excellent absorption of visible light owing to the matched band gap. By the way, Zn x Bi 2 S 3+x /NiTiO 3 composites as mimic enzyme of glucose oxidase, high sensitivity was achieved due to the generated H 2 O 2 as holes scavenger when glucose added, that promote the photo electrons transfer quickly, further increased the PEC signal. The as prepared sensor showed a large linear range of 0.0001–50 ng·mL −1 with 0.04 pg·mL −1 detection limit. Simultaneously, the signal amplification strategy of this sensor provides applicable to other PEC immunosensors for detection of other targets.
研究领域:
生物分析化学
·
分子诊断学
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纳米生物技术
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临床检验医学
·
免疫传感
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Heng Zhang,Jialu Li,Renjie Lu,Huidong Shen,Lihong Wang,Feng Fu,Yucang Liang
Sulfur/oxygen dual-vacancy CuS-S v /NiTiO 3 -O v S-scheme heterojunction was successfully fabricated. • Built-in electric field accelerates electron transfer in sulfur/oxygen-vacancy heterojunction. • Cu centers in CuS-S v accumulate electrons for CO 2 reduction while NiTiO 3 -O v enriches holes in CuS-S v /NiTiO 3 -O v . • Optimized 5% CuS-S v /NiTiO 3 -O v heterojunction exhibits highest CO evolution rate (490 μmol g −1 h −1 ). • Photocatalytic mechanism is proposed for CO 2 reduction. Harnessing solar energy for the photocatalytic CO 2 reduction into valuable fuels presents a sustainability strategy to simultaneously alleviate the global energy crisis and mitigate carbon emission. However, the efficiency of photocatalytic CO 2 reduction is hindered by weak adsorption and sluggish charge separation in semiconductor materials. Herein, a sulfur/oxygen dual-vacancy engineered CuS-S v /NiTiO 3 -O v S-scheme heterojunction is constructed to achieve a remarkable CO production rate of 490.0 μmol g −1 h −1 with 89.1% selectivity. Experimental results reveal that sulfur vacancies probably strengthen CO 2 adsorption and activation, while oxygen defects induced interfacial charge redistribution at the S-scheme heterojunction interface by intensifying the built-in electric field, promoting efficient separation and migration of photogenerated charge carriers. Density functional theory calculations further uncover that sulfur vacancies (S v ) are beneficial to CO 2 adsorption and activation while promoting the stabilization of the key *COOH intermediate, thereby favoring the CO 2 reduction reaction. Moreover, oxygen vacancies (O v ) promote charge redistribution and facilitate charge transfer across the heterojunction interface onto CuS-S v . In-situ diffuse reflectance infrared Fourier transform spectroscopy and Gibbs free energy (ΔG) calculations clarify the reaction pathway, showing that the synergistic interaction of sulfur and oxygen vacancies efficiently decreased the energy barrier for *CO formation by reinforcing the interaction between *COOH intermediates and the catalyst surface. This study highlights a synergistic strategy combining defect engineering and S-scheme heterojunction design to achieve highly selective and efficient photocatalytic CO 2 to CO conversion. The deliberate introduction of sulfur/oxygen dual vacancies induces electron redistribution within the CuS-S v /NiTiO 3 -O v S-scheme heterostructure, concentrating electrons Cu sites and localizing charge on Ni. The built-in electric field drives interfacial transfer, enriching Cu centers that enhance C O activation and accelerate key intermediate formation. Download: Download high-res image (152KB) Download: Download full-size image
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jie Zhou,Nan Zhou,Mingjie Liu,Haokun Tan,Zhichao Wang,Xiaoyuan Zhang,Zhiqiang Su
Sensors in intelligent monitoring and personal healthcare generally face power supply problems, such as cycle charging, regular maintenance, and battery replacement, which greatly limit the applications of sensing devices. Self-powered sensing system with a visible-light-driven photo-fuel cell (PFC) exhibits the advantage of not requiring any external power source for the chemical sensing of analytes. In this work, an enzyme-free PFC self-powered sensing platform was established for sensing sweat lactate using photoelectric conversion technology. A NiTiO 3 /Bi 2 O 3 /MoS 2 double Z-type heterojunction system was prepared by electrostatic interaction and self-assembly as the anode of the PFC. NiTiO 3 , Bi 2 O 3 and MoS 2 formed a double Z-type heterojunction system accelerated the electron transfer and improved the light absorption and photocatalytic efficiency, which in turn improved the perception of LA. In addition. lactic acid sensing experiments showed that the prepared non-enzymatic photoelectrochemical sensors had good detection performance. The assay results showed that the prepared biosensor has a wide detection range (30 μM-5 mM), low detection limit (6 μM), high selectivity(8μA μM −1 cm −2 ) and long-term stability. These assay results demonstrate its potential for applications in fields such as biomedicine and drug analysis.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiabao Wu,Meiyu Xu,Bo Wang,Lijun Liao,Mingxia Li,Wei Zhou
The low utilization of solar energy and rapid recombination of photogenerated carriers severely restrict the development of photocatalytic H 2 O 2 production. In this study, a Ni/NiTiO 3 heterojunction (Ni/NTO) with an atomically shared heterointerface is synthesized via an in-situ reduction strategy. The constructed Ni/NTO heterojunction possesses an intimate interface originating from the shared Ni atoms between metallic Ni nanoparticles and NiTiO 3 nanorods (NTO), effectively facilitating interfacial charge transfer and separation between the two components. Additionally, the localized surface plasmon resonance (LSPR) effect induced by oxygen vacancy defects endows the Ni/NTO heterojunction with enhanced near-infrared (NIR) light-harvesting capability and substantial photothermal conversion efficiency. The synergistic effect between oxygen vacancy defects and the strongly coupled interface with shared Ni atoms significantly enhances solar energy utilization efficiency and photogenerated charge carrier separation efficiency of Ni/NTO heterojunction. The Ni/NTO heterojunction exhibits excellent photocatalytic H 2 O 2 production performance, achieving an H 2 O 2 generation rate of 10608 µM/g/h, which is approximately 55 times higher than pristine NTO. Notably, under NIR light (λ > 800 nm) irradiation, a H 2 O 2 production rate of 4022 µM/g/h is achieved. This work is anticipated to provide valuable guidance for the rational design of high-efficiency full-spectrum-responsive heterojunction photocatalysts through coupling interface and defect engineering.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guojun Li,Zheng Lian,Zhengwei Wan,Zhinian Liu,Jingwen Qian,Yue Deng,Shule Zhang,Qin Zhong
Photocatalytic oxidation offers a viable method for removing low-concentration NO from the atmosphere. However, poor oxygen adsorption-activation capacity and high re-combination rate of electrons and holes limit the photocatalytic NO oxidation activity. To over-come these problems, Ni(OH) 2 clusters decorated NiTiO 3 Z-scheme heterojunctions are constructed by a precipitation method. The tight interfacial contacts and built-in electric field between the (0 0 2) crystal facet of Ni(OH) 2 and (0 1 2) crystal facet of NiTiO 3 promote a Z-scheme charge transfer mechanism. This Z-scheme mechanism will enhance the charge-transfer driving force and result in high separation efficiency of the charges, thus leading to an enhanced photocatalytic performance. Importantly, introducing Ni(OH) 2 is considered a promising strategy to enhance the adsorption ability of the O 2 , NO and NO 2 . This might help to increase O 2 activation efficiency and speed up NO deep oxidation, leading to high NO removal efficiency and low NO 2 selectivity. Benefiting from the above excellent properties, the photocatalytic NO oxidation efficiency of Ni(OH) 2 /NiTiO 3 composites is enhanced and the formation of more toxic NO 2 is inhibited compared with that of NiTiO 3 . This work offers a promising and effective route to design efficient NiTiO 3 -based photocatalysts in the application of environmental remediation.
研究领域:
环境修复
·
光催化
·
材料科学
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无机化学
·
空气污染控制
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Environmental Science-Water Research & Technology
·
2022
·Vol. 8
·期 8
·1763-1776
·
IF 5.819
Di Li,Mingyang Long,Qianqian Zhao,Hongmiao Li,Qi Wen,Fang Song
Nanosized CoTiO3, NiTiO3 and Fe2TiO5 photocatalysts were synthesized by a simple sol–gel method successfully. However, they showed lower photocatalytic activity for the degradation of oxytetracycline hydrochloride under visible light irradiation. After the CoTiO3, NiTiO3 and Fe2TiO5 nanoparticles were loaded in the SBA-15 channels, the photocatalytic activity was enhanced obviously. In order to further enhance the removal efficiency of CoTiO3/SBA-15, NiTiO3/SBA-15 and Fe2TiO5/SBA-15, they were used to activate peroxymonosulfate under visible light irradiation. In particular, CoTiO3/SBA-15 could completely photodegrade oxytetracycline hydrochloride with the assistance of peroxymonosulfate in an hour. The influencing factors on activating peroxymonosulfate to degrade oxytetracycline hydrochloride were investigated in detail. In addition, the electron transfer and peroxymonosulfate activation mechanism for the efficient improvement in the photocatalytic performance were also proposed and proved by radical quenching experiments, electron spin resonance analysis, X-ray photoelectron spectroscopy, transient photocurrent responses and cyclic voltammetry. It was found that the combined activation effects of photogenerated electrons and transition metals on peroxymonosulfate to produce sulfate radicals could enhance the degradation efficiency obviously. This study could provide a new way for the synergetic effect of photocatalysis and peroxymonosulfate activation by transition metal to be used for efficient photocatalytic degradation in the field of antibiotic removal.
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