APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Tao Cai,Wengao Zeng,Yutang Liu,Longlu Wang,Wanyue Dong,Hui Chen,Xinnian Xia
Silver orthophosphate (Ag 3 PO 4 ) based semiconductor photocatalysis have been widely investigated for environmental purification due to its strong oxidation ability. Yet, its poor photostability and low photoactivity hamper its extensive applications. Here, an inorganic-organic Z-scheme photocatalytic system for antibiotic degradation demonstrated high photoactivity and stability through the use of Ag 3 PO 4 /Perylene diimide organic supermolecule (PDIsm). The apparent rate constant of tetracycline hydrochloride (TC-H) degradation with Ag 3 PO 4 /PDIsm was 1.5 times that of Ag 3 PO 4 and 8 times that of PDIsm. The photocatalytic activity of Ag 3 PO 4 /PDIsm toward TC-H still kept 65 % after four reuses, while pure Ag 3 PO 4 only kept 22 %. We revealed that this high photoactivity and photostability arisen from the efficient carriers separation and the formation of direct Z-scheme junction. Importantly, this Z-scheme electron transfer pathway was confirmed by thorough experimental study and density functional theory (DFT) calculation. This work demonstrated the significant potential of Ag 3 PO 4 -based inorganic-organic Z-scheme photocatalyst in environmental remediation.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Rongdi Tang,Daoxin Gong,Yaoyu Zhou,Yaocheng Deng,Chengyang Feng,Sheng Xiong,Ying Huang,Guanwei Peng,Ling Li
Herein, a g-C 3 N 4 /PDI-g-C 3 N 4 homojunction has been fabricated for piezo-photocatalytic atrazine removal and exhibited better performance than individual photocatalysis or piezocatalysis. The introduction of PDI induces the π-π interaction facilitating electrons migration, and twists the g-C 3 N 4 plane into a more polar porous structure with enhanced piezoelectricity. The homojunction facilitates the photoelectron transfer at the g-C 3 N 4 /PDI-g-C 3 N 4 interfaces. The photoelectricity and the piezoelectricity of g-C 3 N 4 /PDI-g-C 3 N 4 were assessed. The finite element simulation showed that the porous structure of the g-C 3 N 4 /PDI-g-C 3 N 4 is essential to the enhanced piezoelectricity. Astonishingly, the piezo-photocatalytic atrazine degradation rate under an optimized condition (pH=2.97) reached 94% within 60 min. Moreover, the g-C 3 N 4 /PDI-g-C 3 N 4 homojunction produced 625.54 μM H 2 O 2 during the one-hour piezo-photocatalysis. Given the quenching experiments, reactive species detection and the electronic band of g-C 3 N 4 /PDI-g-C 3 N 4 , the piezo-photocatalytic mechanism has been proposed. In addition, the degradation pathways and the reduced intermediates toxicity intermediates of atrazine have been investigated.
研究领域:
环境科学
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材料科学
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催化化学
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产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
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IF 3.9
Congzhi Hu,Yuye Li,Tingting Du,Youyong Pang,Yongping Liu,Botian Liu,Ling Li,Huidan Lu,Bin Huang
In this paper, a new supramolecular Z-scheme heterojunction photocatalyst, designated as Ag/Ag 3 PO 4 /Perylene diimide organic molecules after secondary acid-base self-assembly (PDI-2), was synthesized through precipitation and photoreduction techniques. Ag/Ag 3 PO 4 /60 %PDI-2 (APP-6) exhibited the best photocatalytic activity due to the synergistic effect of Z-scheme heterojunction and surface plasmon resonance (SPR) effect of Ag nanoparticles (Ag NPs). Under visible light (λ > 420 nm), the degradation efficiency of APP-6 for Rhodamine B (RhB) and Bisphenol A (BPA) was 99.7 % and 90.7 %, respectively. Additionally, PDI-2 was transformed into smaller nanoclusters, which increased the specific surface area of the photocatalyst, and reduced the charge transport distance. Moreover, APP-6 exhibited the smallest electrochemical impedance, the largest photocurrent, the smallest fluorescence lifetime. Free radical trapping experiments showed that •O 2 − was the main reactive group and a possible photocatalytic mechanism was proposed by combining the Ultraviolet–visible diffuse reflectance spectrophotometer (UV–vis DRS) and the Mott-Schottky plots.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Qiuyi Ji,Zhe Xu,Weiming Xiang,Yijie Wu,Xinying Cheng,Chenmin Xu,Chengdu Qi,Huan He,Jiapeng Hu,Shaogui Yang,Shiyin Li,Limin Zhang
A novel n-n type inorganic/organic heterojunction of flaky-like BiOCl/PDI photocatalyst was constructed by water bath heating method. Meanwhile, a simple method - secondary self-assembly was used to prepare the BiOCl/PDI with a special band structure. The photocatalytic activities were evaluated by degrading aqueous organic pollutants under visible light (λ > 420 nm). The removal rates of 5 mg L −1 phenol (non-ionic type), methyl orange (MO, anionic type), rhodamine B (RhB, cationic type) and 10 mg L −1 RhB by secondary self-assembly BiOCl/PDI (BiOCl/PDI-2) were 8.0%, 3.4%, 27.8% and 78.9% higher than self-assembly BiOCl/PDI (BiOCl/PDI-1) under visible light (λ > 420 nm). The better photocatalytic activity for BiOCl/PDI-2 was attributed to the optimization of energy-band structures, which arose from different exposed surfaces, narrower interplanar spacing and stronger visible light absorption performance. Under acidic condition, BiOCl/PDI-2 showed a good photocatalytic activity, which was not affected by neutral ionic intensity and had good recycling properties. Moreover, the photocatalytic mechanism was explored by free radical capture test and electron paramagnetic resonance (EPR), and contribution of active species was calculated. The main active species of BiOCl/PDI-2 were ·O 2 − , 1 O 2 and h + . Our work may provide a route to design efficient inorganic/organic heterojunctions for organic pollutants degradation .
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Wei Cai,Jincheng Liu,Zewei Liao,Yijun Luo,Xiaoyan Xiang,Bingjie Li,Wenxin Yang,Yanxiong Fang
Overcoming limited charge separation and inefficient solar utilization remains critical for photocatalytic hydrogen evolution. This study addresses these challenges by constructing an organic-inorganic composite photocatalyst by integrating CdZnS nanoparticles with perylene-3,4,9,10-tetracarboxylic diimide (PDI) nanosheets via controlled assembly. Optimizing the PDI content yielded a remarkable hydrogen evolution rate of 7.09 mmol·g −1 ·h −1 under visible light irradiation, representing a 2.3-fold enhancement over pristine CdZnS. This superior photocatalytic performance originates from synergistic effects: exceptional light harvesting by PDI supramolecular structures, enhanced charge mobility via π-π conjugation pathways, and efficient charge separation with high redox potential preservation enabled by the S-scheme heterojunction mechanism. This work establishes a strategic paradigm for developing high-efficiency heterojunction photocatalysts through rational interface engineering.
研究领域:
光催化
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材料科学
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纳米技术
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能量转换
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Rongdi Tang,Daoxin Gong,Yaocheng Deng,Sheng Xiong,Jie Deng,Ling Li,Zhanpeng Zhou,Jiangfu Zheng,Long Su,Lihua Yang
In this study, a novel π-π stacked PDI/g-C 3 N 4 /TiO 2 @Ti 3 C 2 photocatalyst with step-scheme (S-scheme) heterojunction was constructed to boost the atrazine (ATZ) photocatalytic degradation by activating peroxymonosulfate (PMS). The π-π interaction in the PDI/g-C 3 N 4 induced the delocalization of the photoelectrons, therefore promoted their migration. Meanwhile, the intimate contact and the staggered band configurations between the PDI/g-C 3 N 4 and TiO 2 @Ti 3 C 2 results in the S-scheme heterojunction thus declined the recombination of photocarriers. The π-π interaction and S-scheme heterojunction synergistically promoted the ATZ removal rate to 75% within one hour and can be well-adapted in a variety of environments. It was found that 1 O 2 domain the photocatalysis, and the H 2 O 2 generated during the reaction may also be helpful for the process. The transformation of ATZ, intermediates, and three pathways during the process were also investigated via LC-MS. Moreover, the total organic carbon analysis shows that the mineralization of ATZ reached 46.08%.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Liwei Yang,Xuyang Hao,Dian Yu,Peng Zhou,Yaqi Peng,Yanyan Jia,Chuanliang Zhao,Jiaojie He,Chuanlang Zhan,Bo Lai
Due to the low concentrations of pharmaceuticals and personal care products (PPCPs), traditional water treatment processes are difficult to degrade them effectively. 2,5-bis (tributylstannyl) thiophene-perylene diimide-T@TiO 2 (Bis-PDI-T@TiO 2 ) composite photocatalyst is firstly prepared by the bisolvent phase transfer method and has a good ability to activate persulfate (PS) under visible light. 5 ppm Carbamazepine (CBZ) (a typical PPCPs) can be completely degraded by 1.0 g/L prepared photocatalyst and 1.0 mM PS within 30 min in the 0.1 wt% Bis-PDI-T@TiO 2 (PT 0.1 ) system under visible light. Four species of reactive oxidizing species were identified for CBZ degradation, including sulfate radical (SO 4 •− ), hydroxyl radical ( • OH), superoxide radical (O 2 •− ), and positive hole (h + ), and all contributed to CBZ degradation. Furthermore, the PT 0.1 photocatalyst exhibits the high stability and recyclability. This study also proposed the reaction mechanism of the Vis/PS/Bis-PDI-T@TiO 2 system and constructed a route of carbamazepine degradation in the coupled system.
研究领域:
环境科学
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化学
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水处理
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催化
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Yali Song,Ziyan Li,Cairong Yang,Xiaoyu Wen,Long Huang,Xiaojing Zhang,Yongpeng Ma,Qiong Wang,Hongzhong Zhang
To improve the generation of main active substances (·O 2 – and h + ) in sulfamethoxazole (SMX) photocatalytic processes by g–C 3 N 4 , graphitic carbon nitride/perylene diimide (g–C 3 N 4 /PDI, CNPDI) organic photocatalyst with Z–scheme heterojunction was synthesized. Simultaneously, the in–situ self–assembled PDI was realized by introducing short straight–chain alkanes containing terminal carboxylic acid groups at the imide position of PDI molecule and regulating the pH value of the reaction system. g–C 3 N 4 and PDI successfully combined via the formation of –O C–NH– during the preparation process. The π–π interaction between them was conducive to the charge migration at the heterogeneous interface. The addition of PDI in g–C 3 N 4 significantly improved the absorption ability of visible light and facilitated the transportation of photogenerated carriers, leading to enhanced photocatalytic properties. When 2 mg of PDI combined with 500 mg of g–C 3 N 4 , the obtained CNPDI–2 demonstrated the optimal degradation rate for SMX. When reacted for 120 min under visible light, the SMX photodegradation rate by CNPDI–2 was up to 96.3 % because more ·O 2 – and h + generated and participated in the reaction process. The corresponding pseudo–first–order kinetic constant (0.0281 min –1 ) in CNPDI–2 photocatalytic system was 2.4 and 51 times than that in g–C 3 N 4 system (0.0105 min –1 ) and PDI system (0.0005 min –1 ), respectively. Additionally, CNPDI–2 demonstrated the commendable stability, which was suitable for SMX removal in water environment.
研究领域:
环境科学
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材料科学
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有机化学
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光催化
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水处理
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Wengao Zeng,Tao Cai,Yutang Liu,Longlu Wang,Wanyue Dong,Hui Chen,Xinnian Xia
Tungsten trioxide (WO 3 ) has a wide application in environmental remediation due to its stability. Yet, the application of WO 3 is severely limited by its wide band gap and weak electron reduction ability. In this work, we intend to enhance the visible light absorption and photocatalytic performance by constructing an organic-inorganic Z-scheme system WO 3 @Cu@PDI. Apparently, WO 3 @Cu@PDI has excellent visible light absorption and photocatalytic degradation ability in the degradation of tetracycline hydrochloride (TC). Under visible light irradiation, the degradation rate of composites is 40 times faster than that of sole WO 3 and 5 times than PDI. The photocatalytic activity of WO 3 @Cu@PDI toward TC still kept 85% after three reuses. We revealed that this high photoactivity arisen from the efficient carriers separation and the formation of Z-scheme junction. Importantly, this Z-scheme electron transfer pathway was confirmed by thorough experimental study. This work demonstrated the significant potential of WO 3 -based inorganic-organic Z-scheme photocatalyst in environmental remediation.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jie Zhao,Yunning Chen,Renquan Guan,Xueying Cheng,Zhengkai Wu,Nana Zhao,Qingkun Shang,Yingnan Sun
In this paper, we successfully constructed two composite photocatalysts TiO 2 @PDI-NapSO 3 H and Fe-TiO 2 @PDI-NapSO 3 H by utilizing water-soluble PDI derivatives to bond with TiO 2 or iron-doped TiO 2 . Their photocatalytic performance to degrade phenol and diclofenac sodium (DCF) under visible light were investigated. The results show that PDI-NapSO 3 H can effectively improve the optical absorption properties of TiO 2 . Furthermore, the oxygen vacancy produced by doping of Fe in TiO 2 prevents the recombination of photogenerated carriers effectively. The larger conjugate plane of PDI-NapSO 3 H provides a convenient channel for the migration and separation of photogenerated carriers. Thus almost 99 % of phenol or DCF can be degraded by Fe-TiO 2 @PDI-NapSO 3 H within 90 or 120 min, respectively. However, the photocatalytic activity of Fe-TiO 2 @PDI-NapSO 3 H is better. The rate of phenol degradation is much higher than that of TiO 2 @PDI-NapSO 3 H. Further, through the photoelectric response characteristic analysis, radical trapping experiment and EPR test, the effects mechanism of the energy band structure, photogenerated carrier separation efficiency on the photocatalytic performance of Fe-TiO 2 @PDI-NapSO 3 H were discussed. In addition, the possible degradation pathways of DCF and the reasons for the obvious reduction of environmental toxicity after photocatalytic degradation were proposed.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Haoruo Xu,Chenxi Huang,Weili Yu,Ningjie Fang,Yinghao Chu,Jinhui Li
The combined pollution toxicity of hexavalent chromium heavy metal (Cr(VI)) and antibiotics (such as ofloxacin, OFL) is much higher than that of a single pollutant, posing a serious challenge to the ecological environment. Photocatalytic technology can achieve the removal of both single pollutants and composite pollutants. It is urgent to develop catalysts with high carrier separation efficiency and photocatalytic degradation performance. In this work, we successfully prepared m-PDI/BiOI heterojunction catalysts (mPB-3) with tight contact interfaces using the continuous ion layer adsorption and reaction method, and applied them to the synergistic removal of OFL and Cr(VI). The results showed that mPB-3 exhibited a bidirectional enhancement effect. The degradation rate of OFL reached more than 99.5 % within 40 min, the corresponding reduction efficiency of Cr(Ⅵ) reached 63.7 % at pH = 9. Furthermore, the influence of different environmental factors on the degradation process have also been clarified, indicating that mPB-3 has good stability and adaptability. The system characterization results confirmed that a S-scheme heterojunction has been formed. This can accelerate the rapid migration of electrons from m-PDI to BiOI, achieving efficient charge separation, and ultimately enhancing the photocatalytic activity. Finally, the degradation intermediate products and degradation mechanism were analyzed. This study provides a feasible solution for the design of efficient photocatalytic materials and their application in the combined pollution treatment of OFL and Cr(VI). Environmental implication Cr(VI) and OFL coexisting in water bodies pose significant ecological risks due to their enhanced combined toxicity. Traditional treatment techniques often struggle to effectively address such complex pollution systems. This study demonstrates that the m-PDI/BiOI heterojunction photocatalyst can efficiently synergistically remove both contaminants under environmentally relevant conditions (e.g., pH = 9), providing a practical strategy to mitigate composite pollution challenges. The S-scheme charge separation mechanism offers insights for designing advanced catalysts to tackle emerging multi-pollutant threats in aquatic ecosystems, supporting sustainable water treatment solutions.
研究领域:
环境科学
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催化
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材料科学
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水处理技术
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污染控制
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Jing Ding,Mengming Sun,Jinming Liu,Xueqiang Liu,Wenlong Hou,Lu Liu,Haiquan Zhang
The photophysical properties of the hydrogen bond complexes consisting of low-barrier hydrogen bond (LBHB) depend on their environmental condition. However, the stimuli responsive materials based on LBHB are still a challenging problem. Here, we report a novel material system which has high color response to CO 2 based on the position changes of the proton between the two heavy atoms in the low barrier hydrogen bond. Perylene diimide radical anion/branched polyethyleneimine hydrogen bonding complex (TFPDI-b-PEI) linked by low-barrier hydrogen bond ([O 1 -----H 1 ---N 1 ] −1 ) is obtained and it shows the maximum absorption of 789 nm. Meanwhile, the maximum absorption of TFPDI-b-PEI appears at 561 nm with purple when CO 2 is adsorbed in the branched polyethyleneimine . In essence, the geometry of LBHB in TFPDI-b-PEI can switch between two types of hydrogen bond ([O 1 ----H 1 ----N 1 ] −1 and [O 1 -----H 1 ---N 1 ] −1 ) via adjusting the interaction between the surrounding molecule and amine groups in LBHB by interaction of CO 2 with TFPDI-b-PEI. Further the TFPDI-b-PEI shows excellent color switching and colorimetric sensing performance for CO 2 aqueous solution and its gas based on this hydrogen bond dynamic characteristic.
研究领域:
化学
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材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）