Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Jia Guangri,Sun Fusai,Zhou Tao,Wang Ying,Cui Xiaoqiang,Guo Zhengxiao,Fan Fengtao,Yu Jimmy C.
Artificial photosynthesis is a promising approach to produce clean fuels via renewable solar energy. However, it is practically constrained by two issues of slow photogenerated carrier migration and rapid electron/hole recombination. It is also a challenge to achieve a 2:1 ratio of H 2 and O 2 for overall water splitting. Here we report a rational design of spatially differentiated two-dimensional Bi 4 Ti 3 O 12 nanosheets to enhance overall water splitting. Such a spatially differentiated structure overcomes the limitation of charge transfer across different crystal planes in a single crystal semiconductor. The experimental results show a redistribution of charge within a crystal plane. The resulting photocatalyst produces 40.3 μmol h –1 of hydrogen and 20.1 μmol h –1 of oxygen at a near stoichiometric ratio of 2:1 and a solar-to-hydrogen efficiency of 0.1% under simulated solar light.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2026
·
IF 6.5
Reshalaiti Hailili,Zongmian Wang,Liyong Ding,Zelong Li,Xinghao Zhang
Surface oxygen vacancies (Vos) in bismuth-based layered photocatalysts are highly active yet prone to deactivation via refilling by ambient oxidants, posing a major stability challenge for their practical application in urban environmental remediation. To address this, Ag nanoparticles were in-situ photodeposited onto Vo-rich Bi 4 Ti 3 O 12 (BTO-Vo) to construct Ag@BTO-Vo- n composites with varied Ag loadings. The optimal catalyst Ag@BTO-Vo-20 displays exceptionally enhanced photocatalytic activity, with both its degradation kinetics and turnover frequency (TOF) reaching levels over 28.5 and 22.7 times higher than those of pristine BTO and BTO-Vo, respectively. This performance improvement originated from optimized charge carrier dynamics, where the synergistic effect of Vos and Ag/BTO-Vo Schottky junction prolonged carrier lifetime by 2.1 times, enhanced photocurrents by 2.7-fold, and reduced interfacial charge-transfer resistance, leading to efficient charge separation. Mechanistic investigations identified superoxide radicals and holes as the primary active species. Crucially, Ag nanoparticles provide effective protection for the surface Vos through interfacial electron modulation and competitive O 2 adsorption, thereby inhibiting their deactivation and ensuring catalyst stability. This was further validated by comparative EPR analysis of H 2 O 2 -filling experiment. This work elucidates a dual stabilization mechanism where Ag crucially prevents the healing of surface Vos, offering a strategic pathway to design durable and highly active layered photocatalysts for efficient purification of urban environmental pollutants.
✓ 已验证
DOI
高影响因子
Environmental Science-Nano
·
2024
·
IF 5.8
Junzhuyan Wang,Chenjie Zhang,Zhao Qi,Minmin Xu,Yaxian Yuan,Jianlin Yao
Photocatalytic degradation and low-concentration detection of tetracycline (TC) are often limited by the high recombination ratio of carriers and low sensitivity. Herein, we synthesized Bi4Ti3O12 nanosheets (BiTO NSs) by a molten salt method and decorated them with silver nanoparticles (Ag NPs) to obtain BiTO/Ag heterojunctions for degradation via piezo-photocatalysis and detection by surface enhanced Raman spectroscopy (SERS). The synergetic effect originating from piezoelectricity and surface plasmon resonance (SPR) can improve the photon utilization, resulting in an enhancement in the catalytic performance and detection sensitivity. The reduction of TC by BiTO/Ag was as high as 92.1% within 120 min in a solution of 10 ppm, and the limit of detection (LOD) can reach 0.01 ppm. This work offers a new strategy to achieve the effective degradation and high-sensitivity detection of TC by a BiTO/Ag bifunctional heterojunction material.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2025
·
IF 4.7
Yuqing Gao,Zhen Zhan,Jingxiang Hao,Mingxia Li,Liping Guo,Zhenzi Li,Songhua Cai,Xuepeng Wang,Wei Zhou
The high cost of noble metal cocatalysts is impractical for the practical application of photocatalytic hydrogen production. Therefore, the development of photocatalysts to achieve hydrogen production under cocatalyst-free conditions has important economical value. In this work, an excellent visible light responsive covalent organic framework (TpPa-1-COF) and Bi 4 Ti 3 O 12 (BTO) are covalently bonded to construct BTO/TpPa-1-COF inorganic/organic heterojunctions. The obtained BTO/40 %TpPa-1-COF heterojunction achieves high photocatalytic activity without adding cocatalyst. The optimal photocatalytic hydrogen production rate is up to 1055 μmol/g/h, which is 24.3 and 6.2 times higher than that of TpPa-1-COF and physically mixed BTO-40 %TpPa-1-COF. Further studies confirm that the covalent connection between BTO and TpPa-1-COF components can greatly improve the photogenerated charge transfer of TpPa-1-COF, resulting in efficient hydrogen production activity. This provides a new perspective for promoting the practical application of efficient photocatalytic applications.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Binbin Tan,Jing Wang,Yao Deng,Huidi Zhang,Jiang Wang,Zhihao Zhang,Wenlei Wang
The key to enhancing the activation efficiency of peroxydisulfate (PDS) lies in facilitating the adsorption of PDS and accelerating the rate of electron transfer at the interface. In this work, the oxygen vacancy (Ovs) concentration of ultrathin Bi 4 Ti 3 O 12 (BTO) was controlled in situ by high-energy electron beam bombardment. BTO V -300 exhibited a significant activation effect on PDS. The degradation rate constant ( k obs ) for the removal of ciprofloxacin (CIP) was measured to be 0.2080 min −1 under visible light irradiation, which was 3.71 times greater than that of the original BTO. Density functional theory calculations uncovered the principal role of oxygen vacancies as active sites for PDS activation. Introducing OVs significantly boosted the adsorption energy of PDS on BTO and lengthened the O O bond of PDS. This study represents the potential mechanism behind the activation of PDS by BTO V and provides valuable insights for enhancing the photoactivation efficiency of PDS.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Canwen Liu,Lin Zhou,Wenxue Wang,Yang Zhang,Su Zhan,Feng Zhou
Photocatalytic water splitting for clean energy production holds significant practical potential in addressing the global energy crisis. However, the oxygen evolution reaction (OER) remains the primary bottleneck in overall efficiency due to its kinetically sluggish and complex four-electron transfer process. Bi4Ti3O12 theoretically meets the reaction conditions of OER because of its high valence band value and unique layered structure formed by alternately stacking perovskite layers [Bi2Ti3O10]2– and bismuth oxide layers [Bi2O2]2+. However, its application in OER is limited due to its unsatisfactory charge distribution, poor separation efficiency, and low selectivity for O2. Therefore, the Ag-Bi4Ti3O12 composite photocatalyst was prepared by photodeposition. The Schottky barrier between the n-type semiconductor Bi4Ti3O12 and the noble metal Ag can be used as an effective charge transfer channel. This can alter the surface charge distribution and space charge separation efficiency of Bi4Ti3O12, prevent the selective generation of hydroxyl radicals, further enhance its product selectivity to O2, and raise Bi4Ti3O12’s OER efficiency. The results show that the OER rate of Bi4Ti3O12 after Ag loading is obviously improved, which is about twice that of unmodified Bi4Ti3O12. The research results of this work will provide research ideas for the design of efficient OER catalysts.
研究领域:
光催化
·
材料科学
·
能量转换
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 16
·1016
·
IF 4.8
Dehang Ren,Yujiang Sun,Yuzhe Zhang,Xiao Sun,Shijie Xu,Jiakai Wang,Yifan Yan,Xuanting Ding,Yongan Yang
The practical viability of lithium–sulfur batteries (LSBs) is severely hindered by sluggish liquid–solid conversion kinetics and the polysulfide shuttle effect. Herein, we report an in situ-derived ferroelectric-semiconductor Bi4Ti3O12-Bi2S3heterojunction as a multifunctional separator coating. The intimate atomic-level coupling at the heterointerface generates a built-in electric field that, synergizing with the spontaneous ferroelectric polarization of Bi4Ti3O12, structurally intensifies polysulfide chemisorption and lowers the activation energy for bi-directional Li2S precipitation/dissociation. Furthermore, the localized polar field appears to homogenize lithium-ion flux, which may contribute to improved lithium anode stability. Consequently, cells featuring the modified separator deliver a high initial capacity of 1172 mAh g−1at 0.5 C and demonstrate good cycling stability over 500 cycles with a low capacity decay rate of 0.096% per cycle. This in situ interfacial engineering offers a promising kinetic regulatory strategy for improving the performance of LSBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jun Liu,Si-Yao Du,Meng-Jie Chang,Jia Li
Bismuth titanate (Bi 4 Ti 3 O 12 , BTO) has been demonstrated as a promising photocatalyst, but suffers from limited visible-light response, rapid recombination of photogenerated carrier, and few applications for the activation of peroxymonosulfate (PMS). In this work, Fe doped bismuth titanate (Fe/BTO) with very small thickness was successfully synthesized via a molten salt method by using Fe salt source. Compared with the conventional Fe/BTO prepared with Fe 2 O 3 source, the Fe/BTO prepared in this work has homogeneous nanosheet morphology with much smaller thickness around 13.8 nm and higher specific surface area. The doped Fe can significantly decrease the band gap, enhance the light absorption and charge separation. As a result, the Fe/BTO exhibits a significantly enhanced ability to activate PMS for the degradation of organic pollutants. By optimizing the Fe content and calcination temperature, the best Fe/BTO can degrade 99 % rhodamine B (RhB) within 15 min under visible light-PMS (L-PMS) condition with a kinetic constant of 0.4168, which is fairly superior to the BTO or the Fe/BTO under the individual light or PMS condition. Mechanistic studies confirm the involvement of 1 O 2 , e - , ·O 2 - , ·OH and SO 4 · - in the degradation process. This work provides a viable and efficient strategy for designing and preparing visible-light-driven Fe/BTO photocatalyst, advancing their potential for environmental remediation applications.
研究领域:
材料科学
·
环境科学
·
光催化
·
纳米材料
·
环境修复
·
能源化学
·
无机功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xinyu Zhang,Chenxin Ding,Peijie Yang,Jiarong Liu,Meiyu Yang,Xihong Qin,Xinliang Peng,Yun Liao,Hongqing Wang
Featuring both piezoelectric and photocatalytic properties, 2D Bi 4 Ti 3 O 12 (BIT) offers high potential for uranium(VI) (U(VI)) remediation by efficiently suppressing photogenerated electron–hole recombination. However, its practical efficiency is severely limited by the low piezoelectric coefficient, insufficient active sites, and large bandgap. Herein, a series of alkaline-earth metals (ca, Sr, Ba, etc.) were, for the first time, introduced as A-site dopants in BIT to systematically investigate their piezo-photoelectric performance. Through combined theoretical and experimental verification, Ba-doping proved to be optimal for enhancing the piezo-photocatalysis of BIT. Accordingly, Ba-doped Bi 4 Ti 3 O 12 (BBIT-x) catalysts with varying doping concentrations (x = 0.3, 0.5, 1.0, 2.0, 3.0) were synthesized for piezo-photocatalytic U(VI) removal. U(VI) capture experiments show that BBIT-0.5 possesses a superior U(VI) removal of 93.2% within 120 min under piezo-photocatalysis, far exceeding the 55.8% achieved by pristine BIT. Its kinetic rate constant is 3.5 times that of BIT, and 84.6 and 5.6 times those of the individual piezo-catalytic and photocatalytic modes, respectively. Mechanistic studies reveal that the superior U(VI) removal performance originates from the Ba-doping-induced synergistic effect, which promotes the generation of abundant electron-hole pairs via a narrowed bandgap, accelerates charge carrier separation through an enhanced built-in electric field, strengthens U(VI) capture by enriched oxygen vacancy sites, and enables the release of active sites upon the formation of uranyl deposits (i.e., UO 2 , (UO 2 )O 2 ·4H 2 O) with electrons as the catalytic shuttle. Overall, this work deepens our understanding of the rational design of piezo-photocatalysts and offers mechanistic insight into nuclide pollution remediation
✓ 已验证
DOI
PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
Ruan Xiaowen,Ding Chunsheng,Cai Hao,Jiang Runren,Xu Minghua,Meng Depeng,Fang Guozhen,Zhang Dian,Wang Lin,Cui Xiaoqiang,Huang Hongwei,Ravi Sai Kishore
Piezocatalytic hydrogen peroxide (H 2 O 2 ) production holds promise as a sustainable technology, but its practicability is hindered by inadequate polarization fields, sluggish charge transport, and rapid bulk carrier recombination. Herein, we propose a catalyst-design strategy integrating bulk iodine doping with surface MXene cocatalyst coupling in a typical piezoelectric bismuth titanate (Bi 4 Ti 3 O 12 , BTO). This design generates intensified bulk polarization fields that markedly suppress electron-hole recombination, while MXene functions as an efficient interfacial electron sink, significantly reducing surface kinetic barriers by facilitating electron transfer for the oxygen reduction reaction (ORR). The optimized iodine-doped MXene-coupled BTO (MBTO-I) catalyst demonstrates a piezocatalytic H₂O₂ production rate of 5890 µmol g⁻¹ h⁻¹ under ambient conditions without any sacrificial agents. Theoretical calculations and advanced characterization techniques reveal that iodine doping effectively lowers energy barriers for *OH intermediate formation and stabilizes O–H bonds, while MXene coupling significantly improves interfacial charge transfer and accelerates the ORR kinetics. Furthermore, the produced H 2 O 2 was successfully employed for bacterial sterilization and rapid degradation of pollutants. Subsequent chemical analyses and biological assessments confirm a substantial reduction in the toxicity of sulfamethoxazole (SMX) degradation products, highlighting the catalyst’s considerable potential for environmental remediation applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhinian Liu,Guojun Li,Mingjia Zhang,Chen Zhang,Wangsheng Zheng,Xiangting You,Shule Zhang,Qin Zhong
The lack of compactness in heterojunction interfaces and poor charge separation is a great challenge in developing high-efficiency heterojunction photocatalysts . Herein, a novel Bi 4 Ti 3 O 12 -BiPO 4 heterojunction was successfully prepared for the first time by epitaxial growth of BiPO 4 on the surface of Bi 4 Ti 3 O 12 nanosheets . The optimized Bi 4 Ti 3 O 12 -BiPO 4 -0.5 increased the NO oxidation efficiency to 73.05%, surpassing pure Bi 4 Ti 3 O 12 (63.45%) and BiPO 4 (8.35%). Experiments and theoretical calculations indicated that the closely contacted heterointerface between BTO and BPO promoted the generation of the built-in electric field, which led to the formation of the Z- scheme transfer pathway for the photogenerated carriers . Therefore, the separation of photogenerated carriers was facilitated while retaining high redox potential , generating more ·O 2 – and ·OH to participate in NO oxidation. Furthermore, the adsorption of NO and O 2 was enhanced by introducing BiPO 4 , further improving the photocatalytic NO oxidation performance. This work emphasizes the critical role of heterointerface in accelerating charge transfer, providing a basis for the design and construction of tightly contacted heterojunction photocatalysts .
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhaoyang Wang,Pei Wang,Chunyu Bi,Xinxin Zhang,Haitao Yu,Xudong Xiao,Ying Xie
Wastewater containing organic pollutants poses significant risks to both the natural environment and human health, highlighting the urgent need for developing efficient photocatalytic materials. In this study, Pr-doped Bi 4 Ti 3 O 12 nanoflowers with different doping concentrations were synthesized by a one-step hydrothermal method. Density functional theory (DFT) calculations combined with experimental characterization revealed that the introduction of Pr 4f energy levels creates intermediate states within the bandgap, which act as electron trapping centers and prolong the carrier lifetime. Experimental results demonstrated that the 15.5% Pr/Bi 4 Ti 3 O 12 catalyst exhibited the optimal photocatalytic activity for ciprofloxacin degradation, achieving a removal rate of 89.41% within 60 min. Mechanistic investigations revealed that the coexistence of Pr 4+ and Pr 3+ oxidation states facilitates the conversion of O 2 into superoxide radicals (·O 2 − ), which function as one of the predominant reactive species in the catalytic cycle and are responsible for the enhanced photocatalytic degradation efficiency of the material. As a result, Pr doping significantly improves the photocatalytic performance of the catalyst. This work provides further insight into the underlying mechanism of rare-earth doping in photocatalysts.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）