Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic reaction.Herein,polyvinylidene fluoride(PVDF...Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic reaction.Herein,polyvinylidene fluoride(PVDF),a flexible piezoelectric material,was introduced to synthesize a novel Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF(CZS-ZO@C/PVDF)piezo-photocatalytic film by spin coating and immersion phase conversion method.Benefiting from the piezoelectricity of PVDF and the internal electric field(IEF)of CZS-ZO@C Step-scheme(S-Scheme)heterojunction,CZS-ZO@C/PVDF was able to induce a hydrogen generation rate of 34.9 mmol g^(−1)h^(−1)activated by ultrasound and visible light(U-L),which is∼17.5 times of Cd_(0.9)Zn_(0.1)S/PVDF(CZS/PVDF)and∼7.4 times of the photocatalysis rate activated by visible light only(L).Piezoelectric measurements and COMSOL simulation illustrated the excellent piezoelectricity of CZS-ZO@C/PVDF film,which exhibits a piezoelectric coefficient(d33)of 9.9 pm V−1 and a piezoelectric potential of 874 mV(under 0.5 MPa).The reaction mechanism for the exceptional piezo-photocatalytic performance was finally disclosed through density functional theory(DFT)calculation and electrochemical tests.This study enriches the application scope of piezoelectric materials in sustainable energy catalysis and provides a new direction to develop efficient piezoelectric photocatalysts.展开更多
目的:探究伴有干眼的年龄相关性白内障(age related cataract, ARC)患者在超声乳化联合人工晶体植入术术前应用0.1%玻璃酸钠滴眼液的应用效果。方法:选取2020年4月至2023年8月河南省直第三人民医院眼科收治的伴有干眼的ARC患者120例,按...目的:探究伴有干眼的年龄相关性白内障(age related cataract, ARC)患者在超声乳化联合人工晶体植入术术前应用0.1%玻璃酸钠滴眼液的应用效果。方法:选取2020年4月至2023年8月河南省直第三人民医院眼科收治的伴有干眼的ARC患者120例,按照随机数字表法分为参照组和研究组各60例。参照组术前常规治疗,研究组术前使用0.1%玻璃酸钠滴眼液,两组均进行超声乳化联合人工晶体植入术。对比两组患者疗效,治疗前及治疗后4周泪膜破裂时间、中央角膜厚度、中央前房深度,治疗前及治疗1、2、4周后眼表疾病指数评分,以及治疗前及治疗2、4周后泪液分泌试验、角膜荧光素染色评分。结果:参照组、研究组的临床有效率占83.33%、95.00%,相较于参照组,研究组更高(P<0.05)。相较于治疗前,两组治疗后4周泪膜破裂时间均延长,研究组泪膜破裂时间相较于参照组延长(P<0.05),两组患者治疗后4周中央角膜厚度、中央前房深度差异无统计学意义(P>0.05)。相较于治疗前,两组治疗1、2、4周后眼表疾病指数评分均升高,研究组眼表疾病指数评分相较于参照组降低(P<0.05)。相较于治疗前,两组治疗2、4周后泪液分泌试验均降低,角膜荧光素染色评分均升高,研究组泪液分泌试验相较于参照组升高,研究组角膜荧光素染色评分相较于参照组降低(P<0.05)。结论:超声乳化联合人工晶体植入术术前应用0.1%玻璃酸钠滴眼液对于伴有干眼的ARC患者疗效较为明显,致使泪膜破裂时间延长,促进泪膜功能恢复,有效缓解术后眼表改变,避免术后干眼症加重。展开更多
基金supported by the Shandong Provincial Natural Science Foundation,China(ZR2022ME179,ZR2021ME046).
文摘Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic reaction.Herein,polyvinylidene fluoride(PVDF),a flexible piezoelectric material,was introduced to synthesize a novel Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF(CZS-ZO@C/PVDF)piezo-photocatalytic film by spin coating and immersion phase conversion method.Benefiting from the piezoelectricity of PVDF and the internal electric field(IEF)of CZS-ZO@C Step-scheme(S-Scheme)heterojunction,CZS-ZO@C/PVDF was able to induce a hydrogen generation rate of 34.9 mmol g^(−1)h^(−1)activated by ultrasound and visible light(U-L),which is∼17.5 times of Cd_(0.9)Zn_(0.1)S/PVDF(CZS/PVDF)and∼7.4 times of the photocatalysis rate activated by visible light only(L).Piezoelectric measurements and COMSOL simulation illustrated the excellent piezoelectricity of CZS-ZO@C/PVDF film,which exhibits a piezoelectric coefficient(d33)of 9.9 pm V−1 and a piezoelectric potential of 874 mV(under 0.5 MPa).The reaction mechanism for the exceptional piezo-photocatalytic performance was finally disclosed through density functional theory(DFT)calculation and electrochemical tests.This study enriches the application scope of piezoelectric materials in sustainable energy catalysis and provides a new direction to develop efficient piezoelectric photocatalysts.
文摘目的:探究伴有干眼的年龄相关性白内障(age related cataract, ARC)患者在超声乳化联合人工晶体植入术术前应用0.1%玻璃酸钠滴眼液的应用效果。方法:选取2020年4月至2023年8月河南省直第三人民医院眼科收治的伴有干眼的ARC患者120例,按照随机数字表法分为参照组和研究组各60例。参照组术前常规治疗,研究组术前使用0.1%玻璃酸钠滴眼液,两组均进行超声乳化联合人工晶体植入术。对比两组患者疗效,治疗前及治疗后4周泪膜破裂时间、中央角膜厚度、中央前房深度,治疗前及治疗1、2、4周后眼表疾病指数评分,以及治疗前及治疗2、4周后泪液分泌试验、角膜荧光素染色评分。结果:参照组、研究组的临床有效率占83.33%、95.00%,相较于参照组,研究组更高(P<0.05)。相较于治疗前,两组治疗后4周泪膜破裂时间均延长,研究组泪膜破裂时间相较于参照组延长(P<0.05),两组患者治疗后4周中央角膜厚度、中央前房深度差异无统计学意义(P>0.05)。相较于治疗前,两组治疗1、2、4周后眼表疾病指数评分均升高,研究组眼表疾病指数评分相较于参照组降低(P<0.05)。相较于治疗前,两组治疗2、4周后泪液分泌试验均降低,角膜荧光素染色评分均升高,研究组泪液分泌试验相较于参照组升高,研究组角膜荧光素染色评分相较于参照组降低(P<0.05)。结论:超声乳化联合人工晶体植入术术前应用0.1%玻璃酸钠滴眼液对于伴有干眼的ARC患者疗效较为明显,致使泪膜破裂时间延长,促进泪膜功能恢复,有效缓解术后眼表改变,避免术后干眼症加重。
