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| 1 | Ag_(3)PO_(4) decorated black urchin-like defective TiO_(2) for rapid and long-term bacteria-killing under visible light显示文摘Both phototherapy via photocatalysts and physical puncture by artificial nanostructures are promising substitutes for antibiotics when treating drug-resistant bacterial infectious diseases.However,the photodynamic therapeutic efficacy of photocatalysts is seriously restricted by the rapid recombination of photogenerated electron-hole pairs.Meanwhile,the nanostructures of physical puncture are limited to two-dimensional(2D)platforms,and they cannot be fully used yet.Thus,this research developed a synergistic system of Ag_(3)PO_(4) nanoparticles(NPs),decorated with black urchin-like defective TiO_(2)(BU-TiO_(2-X)/Ag_(3)PO_(4)).These NPs had a decreased bandgap compared to BU-TiO_(2-X),and BU-TiO_(2)-X/Ag_(3)PO_(4)(3:1)exhibited the lowest bandgap and the highest separation efficiency for photogenerated electron-hole pairs.After combination with BU-TiO_(2-X),the photostability of Ag_(3)PO_(4) improved because the oxygen vacancy of BU-TiO_(2-X) retards the reduction of Ag^(+) in Ag_(3)PO_(4) into Ag^(0),thus reducing its toxicity.In addition,the nanospikes on the surface of BU-TiO_(2-X) can,from all directions,physically puncture bacterial cells,thus assisting the hybrid’s photodynamic therapeutic effects,alongside the small amount of Ag^(+) released from Ag_(3)PO_(4).This achieves synergy,endowing the hybrid with high antibacterial efficacy of 99.76±0.15%and 99.85±0.09%against Escherichia coli and Staphylococcus aureus,respectively,after light irradiation for 20 min followed by darkness for 12 h.It is anticipated that these findings may bring new insight for developing synergistic treatment strategies against bacterial infectious diseases or pathogenic bacterial polluted environments. | Yingde Xu Xiangmei Liu Yufeng Zheng Changyi Li Kelvin Wai Kwok Yeung Zhenduo Cui Yanqin Liang Zhaoyang Li Shengli Zhu Shuilin Wu | 2021 | Bioactive Materials2021，6，6： | 2 |
| 2 | 稀土基纳米抗菌材料研究进展显示文摘抗生素滥用导致了细菌耐药性的增加和超级细菌的出现,使开发新型抗菌药物迫在眉睫.稀土元素具有独特的理化性质,在抗菌领域的应用得到了越来越多的关注.文章主要介绍了三类稀土基纳米抗菌材料:稀土氧化物、稀土配合物、稀土掺杂复合物,简述了这三类材料的抗菌机制和应用现状,同时对材料未来的抗菌应用前景进行了展望. | 李张荣 牟娟 吴惠霞 | 2022 | 上海师范大学学报(自然科学版)2022，51，5： | 1 |
| 3 | 花球状Ti_(3)C_(2)/TiO_(2)复合材料的制备及其光催化性能显示文摘利用二维(2D)层状Ti_(3)C_(2)衍生出三维(3D)花球状Ti_(3)C_(2)/TiO_(2)复合材料。通过XRD、SEM、TEM、UV-Vis DRS和PL对材料进行了表征,并比较不同温度下合成的Ti_(3)C_(2)/TiO_(2)的光催化活性。结果表明,500℃下合成的Ti_(3)C_(2)/TiO_(2)对酸性品红(AF)表现出更好的光催化降解效率,光催化反应90 min,AF降解率达到97.57%。Ti_(3)C_(2)凭借其高导电性以及与TiO_(2)界面形成的肖特基势垒有效地提高了电荷分离率,抑制了电子-空穴对的复合,从而提高了材料的光催化活性。此外,光催化剂稳定性较好,循环5次后,AF降解率仍能达到86.39%。活性物种捕获实验表明,空穴(h^(+))和超氧自由基(·O_(2)^(–))是降解AF的主要活性物质。 | 李兵 吴福礼 黄有鹏 杨本宏 | 2022 | 精细化工2022，39，2： | 0 |
| 4 | In,X(X=B,Ce)共掺杂TiO_(2)光催化活性研究显示文摘室温下,以硼酸、硝酸铟和硝酸铈为前驱体,采用超声辅助的溶胶-凝胶法制备B,In-TiO_(2)和In,Ce-TiO_(2)光催化剂,并用XRD、XPS、UV-Vis DRS、FT-IR和SEM等对其进行表征。以罗丹明B(RhB)为模拟污染物,考察其在太阳光照射下催化活性。结果表明,共掺杂能显著改善TiO_(2)表面形态,增加活性氧物种的数量,所制备的TiO_(2)催化剂均为锐钛矿;在B,In-TiO_(2)中,填隙B离子的B2p与O_(2)p轨道杂化形成混合价带,部分In取代TiO_(2)晶格中的Ti,形成Ti-O-In结构,使带隙变窄,光催化活性增强。在In,Ce-TiO_(2)中,Ce的氧化物能与TiO_(2)形成异质结间的相互作用及共掺杂In和Ce元素对TiO_(2)电子结构的协同作用,使TiO_(2)的吸收边红移,带隙变窄。太阳光照射下,B,In-TiO_(2)和In,Ce-TiO_(2)降解RhB的速率常数分别为0.7907和0.8525 min^(-1),RhB降解率超过了99%。 | 张鹏会 李艳春 刘东 潘凯涛 胡怀生 胡浩斌 | 2022 | 功能材料2022，53，6： | 0 |
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